UTF8DataInputJsonParser.java
package com.fasterxml.jackson.core.json;
import java.io.*;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.exc.StreamConstraintsException;
import com.fasterxml.jackson.core.io.CharTypes;
import com.fasterxml.jackson.core.io.IOContext;
import com.fasterxml.jackson.core.sym.ByteQuadsCanonicalizer;
import com.fasterxml.jackson.core.util.*;
import static com.fasterxml.jackson.core.JsonTokenId.*;
/**
* This is a concrete implementation of {@link JsonParser}, which is
* based on a {@link java.io.DataInput} as the input source.
*<p>
* Due to limitations in look-ahead (basically there's none), as well
* as overhead of reading content mostly byte-by-byte,
* there are some
* minor differences from regular streaming parsing. Specifically:
*<ul>
* <li>Input location offsets not being tracked, as offsets would need to
* be updated for each read from all over the place. If caller wants
* this information, it has to track this with {@link DataInput}.
* This also affects column number, so the only location information
* available is the row (line) number (but even that is approximate in
* case of two-byte linefeeds -- it should work with single CR or LF tho)
* </li>
* <li>No white space validation:
* checks are simplified NOT to check for control characters.
* </li>
* </ul>
*
* @since 2.8
*/
public class UTF8DataInputJsonParser
extends JsonParserBase
{
/*
/**********************************************************
/* Configuration
/**********************************************************
*/
/**
* Symbol table that contains field names encountered so far
*/
protected final ByteQuadsCanonicalizer _symbols;
/*
/**********************************************************
/* Parsing state
/**********************************************************
*/
/**
* Temporary buffer used for name parsing.
*/
protected int[] _quadBuffer = new int[16];
/**
* Flag that indicates that the current token has not yet
* been fully processed, and needs to be finished for
* some access (or skipped to obtain the next token)
*/
protected boolean _tokenIncomplete;
/**
* Temporary storage for partially parsed name bytes.
*/
private int _quad1;
/*
/**********************************************************
/* Current input data
/**********************************************************
*/
protected DataInput _inputData;
/**
* Sometimes we need buffering for just a single byte we read but
* have to "push back"
*/
protected int _nextByte = -1;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
public UTF8DataInputJsonParser(IOContext ctxt, int features, DataInput inputData,
ObjectCodec codec, ByteQuadsCanonicalizer sym,
int firstByte)
{
super(ctxt, features, codec);
_symbols = sym;
_inputData = inputData;
_nextByte = firstByte;
}
/*
/**********************************************************
/* Overrides for life-cycle
/**********************************************************
*/
@Override
public int releaseBuffered(OutputStream out) throws IOException {
return 0;
}
@Override
public Object getInputSource() {
return _inputData;
}
/*
/**********************************************************
/* Overrides, low-level reading
/**********************************************************
*/
@Override
protected void _closeInput() throws IOException { }
/**
* Method called to release internal buffers owned by the base
* reader. This may be called along with {@link #_closeInput} (for
* example, when explicitly closing this reader instance), or
* separately (if need be).
*/
@Override
protected void _releaseBuffers() throws IOException
{
super._releaseBuffers();
// Merge found symbols, if any:
_symbols.release();
}
/*
/**********************************************************
/* Public API, data access
/**********************************************************
*/
@Override
public String getText() throws IOException
{
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
return _finishAndReturnString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
return _getText2(_currToken);
}
@Override
public int getText(Writer writer) throws IOException
{
JsonToken t = _currToken;
if (t == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
return _textBuffer.contentsToWriter(writer);
}
if (t == JsonToken.FIELD_NAME) {
String n = _parsingContext.getCurrentName();
writer.write(n);
return n.length();
}
if (t != null) {
if (t.isNumeric()) {
return _textBuffer.contentsToWriter(writer);
}
char[] ch = t.asCharArray();
writer.write(ch);
return ch.length;
}
return 0;
}
// // // Let's override default impls for improved performance
@Override
public String getValueAsString() throws IOException
{
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
return _finishAndReturnString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
if (_currToken == JsonToken.FIELD_NAME) {
return currentName();
}
return super.getValueAsString(null);
}
@Override
public String getValueAsString(String defValue) throws IOException
{
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
return _finishAndReturnString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
if (_currToken == JsonToken.FIELD_NAME) {
return currentName();
}
return super.getValueAsString(defValue);
}
@Override
public int getValueAsInt() throws IOException
{
JsonToken t = _currToken;
if ((t == JsonToken.VALUE_NUMBER_INT) || (t == JsonToken.VALUE_NUMBER_FLOAT)) {
// inlined 'getIntValue()'
if ((_numTypesValid & NR_INT) == 0) {
if (_numTypesValid == NR_UNKNOWN) {
return _parseIntValue();
}
if ((_numTypesValid & NR_INT) == 0) {
convertNumberToInt();
}
}
return _numberInt;
}
return super.getValueAsInt(0);
}
@Override
public int getValueAsInt(int defValue) throws IOException
{
JsonToken t = _currToken;
if ((t == JsonToken.VALUE_NUMBER_INT) || (t == JsonToken.VALUE_NUMBER_FLOAT)) {
// inlined 'getIntValue()'
if ((_numTypesValid & NR_INT) == 0) {
if (_numTypesValid == NR_UNKNOWN) {
return _parseIntValue();
}
if ((_numTypesValid & NR_INT) == 0) {
convertNumberToInt();
}
}
return _numberInt;
}
return super.getValueAsInt(defValue);
}
protected final String _getText2(JsonToken t) throws IOException
{
if (t == null) {
return null;
}
switch (t.id()) {
case ID_FIELD_NAME:
return _parsingContext.getCurrentName();
case ID_STRING:
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.contentsAsString();
default:
return t.asString();
}
}
@Override
public char[] getTextCharacters() throws IOException
{
if (_currToken != null) { // null only before/after document
switch (_currToken.id()) {
case ID_FIELD_NAME:
if (!_nameCopied) {
String name = _parsingContext.getCurrentName();
int nameLen = name.length();
if (_nameCopyBuffer == null) {
_nameCopyBuffer = _ioContext.allocNameCopyBuffer(nameLen);
} else if (_nameCopyBuffer.length < nameLen) {
_nameCopyBuffer = new char[nameLen];
}
name.getChars(0, nameLen, _nameCopyBuffer, 0);
_nameCopied = true;
}
return _nameCopyBuffer;
case ID_STRING:
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.getTextBuffer();
default:
return _currToken.asCharArray();
}
}
return null;
}
@Override
public int getTextLength() throws IOException
{
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
return _textBuffer.size();
}
if (_currToken == JsonToken.FIELD_NAME) {
return _parsingContext.getCurrentName().length();
}
if (_currToken != null) { // null only before/after document
if (_currToken.isNumeric()) {
return _textBuffer.size();
}
return _currToken.asCharArray().length;
}
return 0;
}
@Override
public int getTextOffset() throws IOException
{
// Most have offset of 0, only some may have other values:
if (_currToken != null) {
switch (_currToken.id()) {
case ID_FIELD_NAME:
return 0;
case ID_STRING:
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.getTextOffset();
default:
}
}
return 0;
}
@Override
public byte[] getBinaryValue(Base64Variant b64variant) throws IOException
{
if (_currToken != JsonToken.VALUE_STRING &&
(_currToken != JsonToken.VALUE_EMBEDDED_OBJECT || _binaryValue == null)) {
_reportError("Current token ("+_currToken+") not VALUE_STRING or VALUE_EMBEDDED_OBJECT, can not access as binary");
}
/* To ensure that we won't see inconsistent data, better clear up
* state...
*/
if (_tokenIncomplete) {
try {
_binaryValue = _decodeBase64(b64variant);
} catch (IllegalArgumentException iae) {
throw _constructError("Failed to decode VALUE_STRING as base64 ("+b64variant+"): "+iae.getMessage());
}
/* let's clear incomplete only now; allows for accessing other
* textual content in error cases
*/
_tokenIncomplete = false;
} else { // may actually require conversion...
if (_binaryValue == null) {
@SuppressWarnings("resource")
ByteArrayBuilder builder = _getByteArrayBuilder();
_decodeBase64(getText(), builder, b64variant);
_binaryValue = builder.toByteArray();
}
}
return _binaryValue;
}
@Override
public int readBinaryValue(Base64Variant b64variant, OutputStream out) throws IOException
{
// if we have already read the token, just use whatever we may have
if (!_tokenIncomplete || _currToken != JsonToken.VALUE_STRING) {
byte[] b = getBinaryValue(b64variant);
out.write(b);
return b.length;
}
// otherwise do "real" incremental parsing...
byte[] buf = _ioContext.allocBase64Buffer();
try {
return _readBinary(b64variant, out, buf);
} finally {
_ioContext.releaseBase64Buffer(buf);
}
}
protected int _readBinary(Base64Variant b64variant, OutputStream out,
byte[] buffer) throws IOException
{
int outputPtr = 0;
final int outputEnd = buffer.length - 3;
int outputCount = 0;
while (true) {
// first, we'll skip preceding white space, if any
int ch;
do {
ch = _inputData.readUnsignedByte();
} while (ch <= INT_SPACE);
int bits = b64variant.decodeBase64Char(ch);
if (bits < 0) { // reached the end, fair and square?
if (ch == INT_QUOTE) {
break;
}
bits = _decodeBase64Escape(b64variant, ch, 0);
if (bits < 0) { // white space to skip
continue;
}
}
// enough room? If not, flush
if (outputPtr > outputEnd) {
outputCount += outputPtr;
out.write(buffer, 0, outputPtr);
outputPtr = 0;
}
int decodedData = bits;
// then second base64 char; can't get padding yet, nor ws
ch = _inputData.readUnsignedByte();
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
bits = _decodeBase64Escape(b64variant, ch, 1);
}
decodedData = (decodedData << 6) | bits;
// third base64 char; can be padding, but not ws
ch = _inputData.readUnsignedByte();
bits = b64variant.decodeBase64Char(ch);
// First branch: can get padding (-> 1 byte)
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// could also just be 'missing' padding
if (ch == INT_QUOTE) {
decodedData >>= 4;
buffer[outputPtr++] = (byte) decodedData;
if (b64variant.requiresPaddingOnRead()) {
_handleBase64MissingPadding(b64variant);
}
break;
}
bits = _decodeBase64Escape(b64variant, ch, 2);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
// Ok, must get padding
ch = _inputData.readUnsignedByte();
if (!b64variant.usesPaddingChar(ch)) {
if ((ch != INT_BACKSLASH)
|| _decodeBase64Escape(b64variant, ch, 3) != Base64Variant.BASE64_VALUE_PADDING) {
throw reportInvalidBase64Char(b64variant, ch, 3, "expected padding character '"+b64variant.getPaddingChar()+"'");
}
}
// Got 12 bits, only need 8, need to shift
decodedData >>= 4;
buffer[outputPtr++] = (byte) decodedData;
continue;
}
}
// Nope, 2 or 3 bytes
decodedData = (decodedData << 6) | bits;
// fourth and last base64 char; can be padding, but not ws
ch = _inputData.readUnsignedByte();
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// could also just be 'missing' padding
if (ch == INT_QUOTE) {
decodedData >>= 2;
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
if (b64variant.requiresPaddingOnRead()) {
_handleBase64MissingPadding(b64variant);
}
break;
}
bits = _decodeBase64Escape(b64variant, ch, 3);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
/* With padding we only get 2 bytes; but we have
* to shift it a bit so it is identical to triplet
* case with partial output.
* 3 chars gives 3x6 == 18 bits, of which 2 are
* dummies, need to discard:
*/
decodedData >>= 2;
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
continue;
}
}
// otherwise, our triplet is now complete
decodedData = (decodedData << 6) | bits;
buffer[outputPtr++] = (byte) (decodedData >> 16);
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
}
_tokenIncomplete = false;
if (outputPtr > 0) {
outputCount += outputPtr;
out.write(buffer, 0, outputPtr);
}
return outputCount;
}
/*
/**********************************************************
/* Public API, traversal, basic
/**********************************************************
*/
/**
* @return Next token from the stream, if any found, or null
* to indicate end-of-input
*/
@Override
public JsonToken nextToken() throws IOException
{
if (_closed) {
return null;
}
/* First: field names are special -- we will always tokenize
* (part of) value along with field name to simplify
* state handling. If so, can and need to use secondary token:
*/
if (_currToken == JsonToken.FIELD_NAME) {
return _nextAfterName();
}
// But if we didn't already have a name, and (partially?) decode number,
// need to ensure no numeric information is leaked
_numTypesValid = NR_UNKNOWN;
if (_tokenIncomplete) {
_skipString(); // only strings can be partial
}
int i = _skipWSOrEnd();
if (i < 0) { // end-of-input
// Close/release things like input source, symbol table and recyclable buffers
close();
return _updateTokenToNull();
}
// clear any data retained so far
_binaryValue = null;
_tokenInputRow = _currInputRow;
// Closing scope?
if ((i | 0x20) == INT_RCURLY) { // ~ '}]'
_closeScope(i);
return _currToken;
}
// Nope: do we then expect a comma?
if (_parsingContext.expectComma()) {
if (i != INT_COMMA) {
_reportUnexpectedChar(i, "was expecting comma to separate "+_parsingContext.typeDesc()+" entries");
}
i = _skipWS();
// Was that a trailing comma?
if ((_features & FEAT_MASK_TRAILING_COMMA) != 0) {
if ((i | 0x20) == INT_RCURLY) { // ~ '}]'
_closeScope(i);
return _currToken;
}
}
}
/* And should we now have a name? Always true for
* Object contexts, since the intermediate 'expect-value'
* state is never retained.
*/
if (!_parsingContext.inObject()) {
return _nextTokenNotInObject(i);
}
// So first parse the field name itself:
String n = _parseName(i);
_parsingContext.setCurrentName(n);
_updateToken(JsonToken.FIELD_NAME);
i = _skipColon();
// Ok: we must have a value... what is it? Strings are very common, check first:
if (i == INT_QUOTE) {
_tokenIncomplete = true;
_nextToken = JsonToken.VALUE_STRING;
return _currToken;
}
JsonToken t;
switch (i) {
case '-':
t = _parseNegNumber();
break;
case '+':
if (isEnabled(JsonReadFeature.ALLOW_LEADING_PLUS_SIGN_FOR_NUMBERS.mappedFeature())) {
t = _parsePosNumber();
} else {
t = _handleUnexpectedValue(i);
}
break;
case '.': // as per [core#611]
t = _parseFloatThatStartsWithPeriod(false, false);
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
t = _parseUnsignedNumber(i);
break;
case 'f':
_matchToken("false", 1);
t = JsonToken.VALUE_FALSE;
break;
case 'n':
_matchToken("null", 1);
t = JsonToken.VALUE_NULL;
break;
case 't':
_matchToken("true", 1);
t = JsonToken.VALUE_TRUE;
break;
case '[':
t = JsonToken.START_ARRAY;
break;
case '{':
t = JsonToken.START_OBJECT;
break;
default:
t = _handleUnexpectedValue(i);
}
_nextToken = t;
return _currToken;
}
private final JsonToken _nextTokenNotInObject(int i) throws IOException
{
if (i == INT_QUOTE) {
_tokenIncomplete = true;
return _updateToken(JsonToken.VALUE_STRING);
}
switch (i) {
case '[':
createChildArrayContext(_tokenInputRow, _tokenInputCol);
return _updateToken(JsonToken.START_ARRAY);
case '{':
createChildObjectContext(_tokenInputRow, _tokenInputCol);
return _updateToken(JsonToken.START_OBJECT);
case 't':
_matchToken("true", 1);
return _updateToken(JsonToken.VALUE_TRUE);
case 'f':
_matchToken("false", 1);
return _updateToken(JsonToken.VALUE_FALSE);
case 'n':
_matchToken("null", 1);
return _updateToken(JsonToken.VALUE_NULL);
case '-':
return _updateToken(_parseNegNumber());
case '+':
if (isEnabled(JsonReadFeature.ALLOW_LEADING_PLUS_SIGN_FOR_NUMBERS.mappedFeature())) {
return _updateToken(_parsePosNumber());
}
return _updateToken(_handleUnexpectedValue(i));
case '.': // as per [core#611]
return _updateToken(_parseFloatThatStartsWithPeriod(false, false));
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return _updateToken(_parseUnsignedNumber(i));
}
return _updateToken(_handleUnexpectedValue(i));
}
private final JsonToken _nextAfterName() throws IOException
{
_nameCopied = false; // need to invalidate if it was copied
JsonToken t = _nextToken;
_nextToken = null;
// Also: may need to start new context?
if (t == JsonToken.START_ARRAY) {
createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return _updateToken(t);
}
@Override
public void finishToken() throws IOException {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
}
/*
/**********************************************************
/* Public API, traversal, nextXxxValue/nextFieldName
/**********************************************************
*/
// Cannot implement without look-ahead...
// public boolean nextFieldName(SerializableString str) throws IOException
@Override
public String nextFieldName() throws IOException
{
// // // Note: this is almost a verbatim copy of nextToken()
_numTypesValid = NR_UNKNOWN;
if (_currToken == JsonToken.FIELD_NAME) {
_nextAfterName();
return null;
}
if (_tokenIncomplete) {
_skipString();
}
int i = _skipWS();
_binaryValue = null;
_tokenInputRow = _currInputRow;
if ((i | 0x20) == INT_RCURLY) { // ~ '}]'
_closeScope(i);
return null;
}
// Nope: do we then expect a comma?
if (_parsingContext.expectComma()) {
if (i != INT_COMMA) {
_reportUnexpectedChar(i, "was expecting comma to separate "+_parsingContext.typeDesc()+" entries");
}
i = _skipWS();
// Was that a trailing comma?
if ((_features & FEAT_MASK_TRAILING_COMMA) != 0) {
if ((i | 0x20) == INT_RCURLY) { // ~ '}]'
_closeScope(i);
return null;
}
}
}
if (!_parsingContext.inObject()) {
_nextTokenNotInObject(i);
return null;
}
final String nameStr = _parseName(i);
_parsingContext.setCurrentName(nameStr);
_updateToken(JsonToken.FIELD_NAME);
i = _skipColon();
if (i == INT_QUOTE) {
_tokenIncomplete = true;
_nextToken = JsonToken.VALUE_STRING;
return nameStr;
}
JsonToken t;
switch (i) {
case '-':
t = _parseNegNumber();
break;
case '+':
if (isEnabled(JsonReadFeature.ALLOW_LEADING_PLUS_SIGN_FOR_NUMBERS.mappedFeature())) {
t = _parsePosNumber();
} else {
t = _handleUnexpectedValue(i);
}
break;
case '.': // as per [core#611]
t = _parseFloatThatStartsWithPeriod(false, false);
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
t = _parseUnsignedNumber(i);
break;
case 'f':
_matchToken("false", 1);
t = JsonToken.VALUE_FALSE;
break;
case 'n':
_matchToken("null", 1);
t = JsonToken.VALUE_NULL;
break;
case 't':
_matchToken("true", 1);
t = JsonToken.VALUE_TRUE;
break;
case '[':
t = JsonToken.START_ARRAY;
break;
case '{':
t = JsonToken.START_OBJECT;
break;
default:
t = _handleUnexpectedValue(i);
}
_nextToken = t;
return nameStr;
}
@Override
public String nextTextValue() throws IOException
{
// two distinct cases; either got name and we know next type, or 'other'
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_updateToken(t);
if (t == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
return _finishAndReturnString();
}
return _textBuffer.contentsAsString();
}
if (t == JsonToken.START_ARRAY) {
createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return null;
}
return (nextToken() == JsonToken.VALUE_STRING) ? getText() : null;
}
@Override
public int nextIntValue(int defaultValue) throws IOException
{
// two distinct cases; either got name and we know next type, or 'other'
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_updateToken(t);
if (t == JsonToken.VALUE_NUMBER_INT) {
return getIntValue();
}
if (t == JsonToken.START_ARRAY) {
createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return defaultValue;
}
return (nextToken() == JsonToken.VALUE_NUMBER_INT) ? getIntValue() : defaultValue;
}
@Override
public long nextLongValue(long defaultValue) throws IOException
{
// two distinct cases; either got name and we know next type, or 'other'
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_updateToken(t);
if (t == JsonToken.VALUE_NUMBER_INT) {
return getLongValue();
}
if (t == JsonToken.START_ARRAY) {
createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return defaultValue;
}
return (nextToken() == JsonToken.VALUE_NUMBER_INT) ? getLongValue() : defaultValue;
}
@Override
public Boolean nextBooleanValue() throws IOException
{
// two distinct cases; either got name and we know next type, or 'other'
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_updateToken(t);
if (t == JsonToken.VALUE_TRUE) {
return Boolean.TRUE;
}
if (t == JsonToken.VALUE_FALSE) {
return Boolean.FALSE;
}
if (t == JsonToken.START_ARRAY) {
createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return null;
}
JsonToken t = nextToken();
if (t == JsonToken.VALUE_TRUE) {
return Boolean.TRUE;
}
if (t == JsonToken.VALUE_FALSE) {
return Boolean.FALSE;
}
return null;
}
/*
/**********************************************************
/* Internal methods, number parsing
/**********************************************************
*/
@Deprecated // since 2.14
protected final JsonToken _parseFloatThatStartsWithPeriod() throws IOException {
return _parseFloatThatStartsWithPeriod(false, false);
}
protected final JsonToken _parseFloatThatStartsWithPeriod(final boolean neg,
final boolean hasSign)
throws IOException
{
// [core#611]: allow optionally leading decimal point
if (!isEnabled(JsonReadFeature.ALLOW_LEADING_DECIMAL_POINT_FOR_NUMBERS.mappedFeature())) {
return _handleUnexpectedValue(INT_PERIOD);
}
final char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
int outPtr = 0;
// 27-Jun-2022, tatu: [core#784] would add plus here too but not yet
if (neg) {
outBuf[outPtr++] = '-';
}
return _parseFloat(outBuf, outPtr, INT_PERIOD, neg, 0);
}
/**
* Initial parsing method for number values. It needs to be able
* to parse enough input to be able to determine whether the
* value is to be considered a simple integer value, or a more
* generic decimal value: latter of which needs to be expressed
* as a floating point number. The basic rule is that if the number
* has no fractional or exponential part, it is an integer; otherwise
* a floating point number.
*<p>
* Because much of input has to be processed in any case, no partial
* parsing is done: all input text will be stored for further
* processing. However, actual numeric value conversion will be
* deferred, since it is usually the most complicated and costliest
* part of processing.
*
* @param c The first non-null digit character of the number to parse
*
* @return Type of token decoded, usually {@link JsonToken#VALUE_NUMBER_INT}
* or {@link JsonToken#VALUE_NUMBER_FLOAT}
*
* @throws IOException for low-level read issues, or
* {@link JsonParseException} for decoding problems
*/
protected JsonToken _parseUnsignedNumber(int c) throws IOException
{
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
int outPtr;
// One special case: if first char is 0, must not be followed by a digit.
// Gets a bit tricky as we only want to retain 0 if it's the full value
if (c == INT_0) {
c = _handleLeadingZeroes();
if (c <= INT_9 && c >= INT_0) { // skip if followed by digit
outPtr = 0;
} else if (c == 'x' || c == 'X') {
return _handleInvalidNumberStart(c, false);
} else {
outBuf[0] = '0';
outPtr = 1;
}
} else {
outBuf[0] = (char) c;
c = _inputData.readUnsignedByte();
outPtr = 1;
}
int intLen = outPtr;
// With this, we have a nice and tight loop:
while (c <= INT_9 && c >= INT_0) {
++intLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
c = _inputData.readUnsignedByte();
}
if (c == '.' || (c | 0x20) == INT_e) { // ~ '.eE'
return _parseFloat(outBuf, outPtr, c, false, intLen);
}
_textBuffer.setCurrentLength(outPtr);
// As per [core#105], need separating space between root values; check here
_nextByte = c;
if (_parsingContext.inRoot()) {
_verifyRootSpace();
}
// And there we have it!
return resetInt(false, intLen);
}
protected final JsonToken _parsePosNumber() throws IOException
{
return _parseSignedNumber(false);
}
protected final JsonToken _parseNegNumber() throws IOException
{
return _parseSignedNumber(true);
}
private final JsonToken _parseSignedNumber(boolean negative) throws IOException
{
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
int outPtr = 0;
if (negative) {
// Need to prepend sign?
outBuf[outPtr++] = '-';
}
int c = _inputData.readUnsignedByte();
outBuf[outPtr++] = (char) c;
// Note: must be followed by a digit
if (c <= INT_0) {
// One special case: if first char is 0 need to check no leading zeroes
if (c == INT_0) {
c = _handleLeadingZeroes();
} else if (c == INT_PERIOD) {
return _parseFloatThatStartsWithPeriod(negative, true);
} else {
return _handleInvalidNumberStart(c, negative, true);
}
} else {
if (c > INT_9) {
return _handleInvalidNumberStart(c, negative, true);
}
c = _inputData.readUnsignedByte();
}
// Ok: we can first just add digit we saw first:
int intLen = 1;
// With this, we have a nice and tight loop:
while (c <= INT_9 && c >= INT_0) {
++intLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
c = _inputData.readUnsignedByte();
}
if (c == '.' || (c | 0x20) == INT_e) { // ~ '.eE'
return _parseFloat(outBuf, outPtr, c, negative, intLen);
}
_textBuffer.setCurrentLength(outPtr);
// As per [core#105], need separating space between root values; check here
_nextByte = c;
if (_parsingContext.inRoot()) {
_verifyRootSpace();
}
// And there we have it!
return resetInt(negative, intLen);
}
/**
* Method called when we have seen one zero, and want to ensure
* it is not followed by another, or, if leading zeroes allowed,
* skipped redundant ones.
*
* @return Character immediately following zeroes
*
* @throws IOException for low-level read issues, or
* {@link JsonParseException} for decoding problems
*/
private final int _handleLeadingZeroes() throws IOException
{
int ch = _inputData.readUnsignedByte();
// if not followed by a number (probably '.'); return zero as is, to be included
if (ch < INT_0 || ch > INT_9) {
return ch;
}
// we may want to allow leading zeroes them, after all...
if ((_features & FEAT_MASK_LEADING_ZEROS) == 0) {
reportInvalidNumber("Leading zeroes not allowed");
}
// if so, just need to skip either all zeroes (if followed by number); or all but one (if non-number)
while (ch == INT_0) {
ch = _inputData.readUnsignedByte();
}
return ch;
}
private final JsonToken _parseFloat(char[] outBuf, int outPtr, int c,
boolean negative, int integerPartLength) throws IOException
{
int fractLen = 0;
// And then see if we get other parts
if (c == INT_PERIOD) { // yes, fraction
// May have rather long integral part so need to check there's space:
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
fract_loop:
while (true) {
c = _inputData.readUnsignedByte();
if (c < INT_0 || c > INT_9) {
break fract_loop;
}
++fractLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
}
// must be followed by sequence of ints, one minimum
if (fractLen == 0) {
if (!isEnabled(JsonReadFeature.ALLOW_TRAILING_DECIMAL_POINT_FOR_NUMBERS.mappedFeature())) {
_reportUnexpectedNumberChar(c, "Decimal point not followed by a digit");
}
}
}
int expLen = 0;
if ((c | 0x20) == INT_e) { // ~ 'eE' exponent?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
c = _inputData.readUnsignedByte();
// Sign indicator?
if (c == '-' || c == '+') {
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
c = _inputData.readUnsignedByte();
}
while (c <= INT_9 && c >= INT_0) {
++expLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
c = _inputData.readUnsignedByte();
}
// must be followed by sequence of ints, one minimum
if (expLen == 0) {
_reportUnexpectedNumberChar(c, "Exponent indicator not followed by a digit");
}
}
// Ok; unless we hit end-of-input, need to push last char read back
// As per #105, need separating space between root values; check here
_nextByte = c;
if (_parsingContext.inRoot()) {
_verifyRootSpace();
}
_textBuffer.setCurrentLength(outPtr);
// And there we have it!
return resetFloat(negative, integerPartLength, fractLen, expLen);
}
/*
* Method called to ensure that a root-value is followed by a space token,
* if possible.
*<p>
* NOTE: with {@link DataInput} source, not really feasible, up-front.
* If we did want, we could rearrange things to require space before
* next read, but initially let's just do nothing.
*/
private final void _verifyRootSpace() throws IOException
{
int ch = _nextByte;
if (ch <= INT_SPACE) {
_nextByte = -1;
if (ch == INT_CR || ch == INT_LF) {
++_currInputRow;
}
return;
}
_reportMissingRootWS(ch);
}
/*
/**********************************************************
/* Internal methods, secondary parsing
/**********************************************************
*/
protected final String _parseName(int i) throws IOException
{
if (i != INT_QUOTE) {
return _handleOddName(i);
}
// If so, can also unroll loops nicely
/* 25-Nov-2008, tatu: This may seem weird, but here we do
* NOT want to worry about UTF-8 decoding. Rather, we'll
* assume that part is ok (if not it will get caught
* later on), and just handle quotes and backslashes here.
*/
final int[] codes = INPUT_CODES_LATIN1;
int q = _inputData.readUnsignedByte();
if (codes[q] == 0) {
i = _inputData.readUnsignedByte();
if (codes[i] == 0) {
q = (q << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] == 0) {
q = (q << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] == 0) {
q = (q << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] == 0) {
_quad1 = q;
return _parseMediumName(i);
}
if (i == INT_QUOTE) { // 4 byte/char case or broken
return findName(q, 4);
}
return parseName(q, i, 4);
}
if (i == INT_QUOTE) { // 3 byte/char case or broken
return findName(q, 3);
}
return parseName(q, i, 3);
}
if (i == INT_QUOTE) { // 2 byte/char case or broken
return findName(q, 2);
}
return parseName(q, i, 2);
}
if (i == INT_QUOTE) { // one byte/char case or broken
return findName(q, 1);
}
return parseName(q, i, 1);
}
if (q == INT_QUOTE) { // special case, ""
return "";
}
return parseName(0, q, 0); // quoting or invalid char
}
private final String _parseMediumName(int q2) throws IOException
{
final int[] codes = INPUT_CODES_LATIN1;
// Ok, got 5 name bytes so far
int i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 5 bytes
return findName(_quad1, q2, 1);
}
return parseName(_quad1, q2, i, 1); // quoting or invalid char
}
q2 = (q2 << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 6 bytes
return findName(_quad1, q2, 2);
}
return parseName(_quad1, q2, i, 2);
}
q2 = (q2 << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 7 bytes
return findName(_quad1, q2, 3);
}
return parseName(_quad1, q2, i, 3);
}
q2 = (q2 << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 8 bytes
return findName(_quad1, q2, 4);
}
return parseName(_quad1, q2, i, 4);
}
return _parseMediumName2(i, q2);
}
private final String _parseMediumName2(int q3, final int q2) throws IOException
{
final int[] codes = INPUT_CODES_LATIN1;
// Got 9 name bytes so far
int i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 9 bytes
return findName(_quad1, q2, q3, 1);
}
return parseName(_quad1, q2, q3, i, 1);
}
q3 = (q3 << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 10 bytes
return findName(_quad1, q2, q3, 2);
}
return parseName(_quad1, q2, q3, i, 2);
}
q3 = (q3 << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 11 bytes
return findName(_quad1, q2, q3, 3);
}
return parseName(_quad1, q2, q3, i, 3);
}
q3 = (q3 << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 12 bytes
return findName(_quad1, q2, q3, 4);
}
return parseName(_quad1, q2, q3, i, 4);
}
return _parseLongName(i, q2, q3);
}
private final String _parseLongName(int q, final int q2, int q3) throws IOException
{
_quadBuffer[0] = _quad1;
_quadBuffer[1] = q2;
_quadBuffer[2] = q3;
// As explained above, will ignore UTF-8 encoding at this point
final int[] codes = INPUT_CODES_LATIN1;
int qlen = 3;
while (true) {
int i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) {
return findName(_quadBuffer, qlen, q, 1);
}
return parseEscapedName(_quadBuffer, qlen, q, i, 1);
}
q = (q << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) {
return findName(_quadBuffer, qlen, q, 2);
}
return parseEscapedName(_quadBuffer, qlen, q, i, 2);
}
q = (q << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) {
return findName(_quadBuffer, qlen, q, 3);
}
return parseEscapedName(_quadBuffer, qlen, q, i, 3);
}
q = (q << 8) | i;
i = _inputData.readUnsignedByte();
if (codes[i] != 0) {
if (i == INT_QUOTE) {
return findName(_quadBuffer, qlen, q, 4);
}
return parseEscapedName(_quadBuffer, qlen, q, i, 4);
}
// Nope, no end in sight. Need to grow quad array etc
if (qlen >= _quadBuffer.length) {
_quadBuffer = growArrayBy(_quadBuffer, qlen);
}
_quadBuffer[qlen++] = q;
q = i;
}
}
private final String parseName(int q1, int ch, int lastQuadBytes) throws IOException {
return parseEscapedName(_quadBuffer, 0, q1, ch, lastQuadBytes);
}
private final String parseName(int q1, int q2, int ch, int lastQuadBytes) throws IOException {
_quadBuffer[0] = q1;
return parseEscapedName(_quadBuffer, 1, q2, ch, lastQuadBytes);
}
private final String parseName(int q1, int q2, int q3, int ch, int lastQuadBytes) throws IOException {
_quadBuffer[0] = q1;
_quadBuffer[1] = q2;
return parseEscapedName(_quadBuffer, 2, q3, ch, lastQuadBytes);
}
/* Slower parsing method which is generally branched to when
* an escape sequence is detected (or alternatively for long
* names, one crossing input buffer boundary).
* Needs to be able to handle more exceptional cases, gets slower,
* and hence is offlined to a separate method.
*/
protected final String parseEscapedName(int[] quads, int qlen, int currQuad, int ch,
int currQuadBytes) throws IOException
{
/* 25-Nov-2008, tatu: This may seem weird, but here we do not want to worry about
* UTF-8 decoding yet. Rather, we'll assume that part is ok (if not it will get
* caught later on), and just handle quotes and backslashes here.
*/
final int[] codes = INPUT_CODES_LATIN1;
while (true) {
if (codes[ch] != 0) {
if (ch == INT_QUOTE) { // we are done
break;
}
// Unquoted white space?
if (ch != INT_BACKSLASH) {
// As per [JACKSON-208], call can now return:
_throwUnquotedSpace(ch, "name");
} else {
// Nope, escape sequence
ch = _decodeEscaped();
}
/* Oh crap. May need to UTF-8 (re-)encode it, if it's
* beyond 7-bit ascii. Gets pretty messy.
* If this happens often, may want to use different name
* canonicalization to avoid these hits.
*/
if (ch > 127) {
// Ok, we'll need room for first byte right away
if (currQuadBytes >= 4) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = 0;
currQuadBytes = 0;
}
if (ch < 0x800) { // 2-byte
currQuad = (currQuad << 8) | (0xc0 | (ch >> 6));
++currQuadBytes;
// Second byte gets output below:
} else { // 3 bytes; no need to worry about surrogates here
currQuad = (currQuad << 8) | (0xe0 | (ch >> 12));
++currQuadBytes;
// need room for middle byte?
if (currQuadBytes >= 4) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = 0;
currQuadBytes = 0;
}
currQuad = (currQuad << 8) | (0x80 | ((ch >> 6) & 0x3f));
++currQuadBytes;
}
// And same last byte in both cases, gets output below:
ch = 0x80 | (ch & 0x3f);
}
}
// Ok, we have one more byte to add at any rate:
if (currQuadBytes < 4) {
++currQuadBytes;
currQuad = (currQuad << 8) | ch;
} else {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = ch;
currQuadBytes = 1;
}
ch = _inputData.readUnsignedByte();
}
if (currQuadBytes > 0) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = pad(currQuad, currQuadBytes);
}
String name = _symbols.findName(quads, qlen);
if (name == null) {
name = addName(quads, qlen, currQuadBytes);
}
return name;
}
/**
* Method called when we see non-white space character other
* than double quote, when expecting a field name.
* In standard mode will just throw an exception; but
* in non-standard modes may be able to parse name.
*
* @param ch First undecoded character of possible "odd name" to decode
*
* @return Name decoded, if allowed and successful
*
* @throws IOException for low-level read issues, or
* {@link JsonParseException} for decoding problems (invalid name)
*/
protected String _handleOddName(int ch) throws IOException
{
if (ch == '\'' && (_features & FEAT_MASK_ALLOW_SINGLE_QUOTES) != 0) {
return _parseAposName();
}
if ((_features & FEAT_MASK_ALLOW_UNQUOTED_NAMES) == 0) {
char c = (char) _decodeCharForError(ch);
_reportUnexpectedChar(c, "was expecting double-quote to start field name");
}
/* Also: note that although we use a different table here,
* it does NOT handle UTF-8 decoding. It'll just pass those
* high-bit codes as acceptable for later decoding.
*/
final int[] codes = CharTypes.getInputCodeUtf8JsNames();
// Also: must start with a valid character...
if (codes[ch] != 0) {
_reportUnexpectedChar(ch, "was expecting either valid name character (for unquoted name) or double-quote (for quoted) to start field name");
}
/* Ok, now; instead of ultra-optimizing parsing here (as with
* regular JSON names), let's just use the generic "slow"
* variant. Can measure its impact later on if need be
*/
int[] quads = _quadBuffer;
int qlen = 0;
int currQuad = 0;
int currQuadBytes = 0;
while (true) {
// Ok, we have one more byte to add at any rate:
if (currQuadBytes < 4) {
++currQuadBytes;
currQuad = (currQuad << 8) | ch;
} else {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = ch;
currQuadBytes = 1;
}
ch = _inputData.readUnsignedByte();
if (codes[ch] != 0) {
break;
}
}
// Note: we must "push back" character read here for future consumption
_nextByte = ch;
if (currQuadBytes > 0) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
}
String name = _symbols.findName(quads, qlen);
if (name == null) {
name = addName(quads, qlen, currQuadBytes);
}
return name;
}
/* Parsing to allow optional use of non-standard single quotes.
* Plenty of duplicated code;
* main reason being to try to avoid slowing down fast path
* for valid JSON -- more alternatives, more code, generally
* bit slower execution.
*/
protected String _parseAposName() throws IOException
{
int ch = _inputData.readUnsignedByte();
if (ch == '\'') { // special case, ''
return "";
}
int[] quads = _quadBuffer;
int qlen = 0;
int currQuad = 0;
int currQuadBytes = 0;
// Copied from parseEscapedFieldName, with minor mods:
final int[] codes = INPUT_CODES_LATIN1;
while (true) {
if (ch == '\'') {
break;
}
// additional check to skip handling of double-quotes
if (ch != '"' && codes[ch] != 0) {
if (ch != '\\') {
// Unquoted white space?
// As per [JACKSON-208], call can now return:
_throwUnquotedSpace(ch, "name");
} else {
// Nope, escape sequence
ch = _decodeEscaped();
}
/* Oh crap. May need to UTF-8 (re-)encode it, if it's beyond
* 7-bit ASCII. Gets pretty messy. If this happens often, may want
* to use different name canonicalization to avoid these hits.
*/
if (ch > 127) {
// Ok, we'll need room for first byte right away
if (currQuadBytes >= 4) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = 0;
currQuadBytes = 0;
}
if (ch < 0x800) { // 2-byte
currQuad = (currQuad << 8) | (0xc0 | (ch >> 6));
++currQuadBytes;
// Second byte gets output below:
} else { // 3 bytes; no need to worry about surrogates here
currQuad = (currQuad << 8) | (0xe0 | (ch >> 12));
++currQuadBytes;
// need room for middle byte?
if (currQuadBytes >= 4) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = 0;
currQuadBytes = 0;
}
currQuad = (currQuad << 8) | (0x80 | ((ch >> 6) & 0x3f));
++currQuadBytes;
}
// And same last byte in both cases, gets output below:
ch = 0x80 | (ch & 0x3f);
}
}
// Ok, we have one more byte to add at any rate:
if (currQuadBytes < 4) {
++currQuadBytes;
currQuad = (currQuad << 8) | ch;
} else {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = ch;
currQuadBytes = 1;
}
ch = _inputData.readUnsignedByte();
}
if (currQuadBytes > 0) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = pad(currQuad, currQuadBytes);
}
String name = _symbols.findName(quads, qlen);
if (name == null) {
name = addName(quads, qlen, currQuadBytes);
}
return name;
}
/*
/**********************************************************
/* Internal methods, symbol (name) handling
/**********************************************************
*/
private final String findName(int q1, int lastQuadBytes)
throws JsonParseException, StreamConstraintsException
{
q1 = pad(q1, lastQuadBytes);
// Usually we'll find it from the canonical symbol table already
String name = _symbols.findName(q1);
if (name != null) {
return name;
}
// If not, more work. We'll need add stuff to buffer
_quadBuffer[0] = q1;
return addName(_quadBuffer, 1, lastQuadBytes);
}
private final String findName(int q1, int q2, int lastQuadBytes)
throws JsonParseException, StreamConstraintsException
{
q2 = pad(q2, lastQuadBytes);
// Usually we'll find it from the canonical symbol table already
String name = _symbols.findName(q1, q2);
if (name != null) {
return name;
}
// If not, more work. We'll need add stuff to buffer
_quadBuffer[0] = q1;
_quadBuffer[1] = q2;
return addName(_quadBuffer, 2, lastQuadBytes);
}
private final String findName(int q1, int q2, int q3, int lastQuadBytes)
throws JsonParseException, StreamConstraintsException
{
q3 = pad(q3, lastQuadBytes);
String name = _symbols.findName(q1, q2, q3);
if (name != null) {
return name;
}
int[] quads = _quadBuffer;
quads[0] = q1;
quads[1] = q2;
quads[2] = pad(q3, lastQuadBytes);
return addName(quads, 3, lastQuadBytes);
}
private final String findName(int[] quads, int qlen, int lastQuad, int lastQuadBytes)
throws JsonParseException, StreamConstraintsException
{
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = pad(lastQuad, lastQuadBytes);
String name = _symbols.findName(quads, qlen);
if (name == null) {
return addName(quads, qlen, lastQuadBytes);
}
return name;
}
/**
* This is the main workhorse method used when we take a symbol
* table miss. It needs to demultiplex individual bytes, decode
* multi-byte chars (if any), and then construct Name instance
* and add it to the symbol table.
*/
private final String addName(int[] quads, int qlen, int lastQuadBytes)
throws JsonParseException, StreamConstraintsException
{
/* Ok: must decode UTF-8 chars. No other validation is
* needed, since unescaping has been done earlier as necessary
* (as well as error reporting for unescaped control chars)
*/
// 4 bytes per quad, except last one maybe less
int byteLen = (qlen << 2) - 4 + lastQuadBytes;
/* And last one is not correctly aligned (leading zero bytes instead
* need to shift a bit, instead of trailing). Only need to shift it
* for UTF-8 decoding; need revert for storage (since key will not
* be aligned, to optimize lookup speed)
*/
int lastQuad;
if (lastQuadBytes < 4) {
lastQuad = quads[qlen-1];
// 8/16/24 bit left shift
quads[qlen-1] = (lastQuad << ((4 - lastQuadBytes) << 3));
} else {
lastQuad = 0;
}
// Need some working space, TextBuffer works well:
char[] cbuf = _textBuffer.emptyAndGetCurrentSegment();
int cix = 0;
for (int ix = 0; ix < byteLen; ) {
int ch = quads[ix >> 2]; // current quad, need to shift+mask
int byteIx = (ix & 3);
ch = (ch >> ((3 - byteIx) << 3)) & 0xFF;
++ix;
if (ch > 127) { // multi-byte
int needed;
if ((ch & 0xE0) == 0xC0) { // 2 bytes (0x0080 - 0x07FF)
ch &= 0x1F;
needed = 1;
} else if ((ch & 0xF0) == 0xE0) { // 3 bytes (0x0800 - 0xFFFF)
ch &= 0x0F;
needed = 2;
} else if ((ch & 0xF8) == 0xF0) { // 4 bytes; double-char with surrogates and all...
ch &= 0x07;
needed = 3;
} else { // 5- and 6-byte chars not valid xml chars
_reportInvalidInitial(ch);
needed = ch = 1; // never really gets this far
}
if ((ix + needed) > byteLen) {
_reportInvalidEOF(" in field name", JsonToken.FIELD_NAME);
}
// Ok, always need at least one more:
int ch2 = quads[ix >> 2]; // current quad, need to shift+mask
byteIx = (ix & 3);
ch2 = (ch2 >> ((3 - byteIx) << 3));
++ix;
if ((ch2 & 0xC0) != 0x080) {
_reportInvalidOther(ch2);
}
ch = (ch << 6) | (ch2 & 0x3F);
if (needed > 1) {
ch2 = quads[ix >> 2];
byteIx = (ix & 3);
ch2 = (ch2 >> ((3 - byteIx) << 3));
++ix;
if ((ch2 & 0xC0) != 0x080) {
_reportInvalidOther(ch2);
}
ch = (ch << 6) | (ch2 & 0x3F);
if (needed > 2) { // 4 bytes? (need surrogates on output)
ch2 = quads[ix >> 2];
byteIx = (ix & 3);
ch2 = (ch2 >> ((3 - byteIx) << 3));
++ix;
if ((ch2 & 0xC0) != 0x080) {
_reportInvalidOther(ch2 & 0xFF);
}
ch = (ch << 6) | (ch2 & 0x3F);
}
}
if (needed > 2) { // surrogate pair? once again, let's output one here, one later on
ch -= 0x10000; // to normalize it starting with 0x0
if (cix >= cbuf.length) {
cbuf = _textBuffer.expandCurrentSegment();
}
cbuf[cix++] = (char) (0xD800 + (ch >> 10));
ch = 0xDC00 | (ch & 0x03FF);
}
}
if (cix >= cbuf.length) {
cbuf = _textBuffer.expandCurrentSegment();
}
cbuf[cix++] = (char) ch;
}
// Ok. Now we have the character array, and can construct the String
String baseName = new String(cbuf, 0, cix);
// 5-May-2023, ckozak: [core#1015] respect CANONICALIZE_FIELD_NAMES factory config.
if (!_symbols.isCanonicalizing()) {
return baseName;
}
// And finally, un-align if necessary
if (lastQuadBytes < 4) {
quads[qlen-1] = lastQuad;
}
return _symbols.addName(baseName, quads, qlen);
}
/*
/**********************************************************
/* Internal methods, String value parsing
/**********************************************************
*/
@Override
protected void _finishString() throws IOException
{
int outPtr = 0;
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
final int[] codes = INPUT_CODES_UTF8;
final int outEnd = outBuf.length;
do {
int c = _inputData.readUnsignedByte();
if (codes[c] != 0) {
if (c == INT_QUOTE) {
_textBuffer.setCurrentLength(outPtr);
return;
}
_finishString2(outBuf, outPtr, c);
return;
}
outBuf[outPtr++] = (char) c;
} while (outPtr < outEnd);
_finishString2(outBuf, outPtr, _inputData.readUnsignedByte());
}
private String _finishAndReturnString() throws IOException
{
int outPtr = 0;
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
final int[] codes = INPUT_CODES_UTF8;
final int outEnd = outBuf.length;
do {
int c = _inputData.readUnsignedByte();
if (codes[c] != 0) {
if (c == INT_QUOTE) {
return _textBuffer.setCurrentAndReturn(outPtr);
}
_finishString2(outBuf, outPtr, c);
return _textBuffer.contentsAsString();
}
outBuf[outPtr++] = (char) c;
} while (outPtr < outEnd);
_finishString2(outBuf, outPtr, _inputData.readUnsignedByte());
return _textBuffer.contentsAsString();
}
private final void _finishString2(char[] outBuf, int outPtr, int c)
throws IOException
{
// Here we do want to do full decoding, hence:
final int[] codes = INPUT_CODES_UTF8;
int outEnd = outBuf.length;
main_loop:
for (;; c = _inputData.readUnsignedByte()) {
// Then the tight ASCII non-funny-char loop:
while (codes[c] == 0) {
if (outPtr >= outEnd) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
outEnd = outBuf.length;
}
outBuf[outPtr++] = (char) c;
c = _inputData.readUnsignedByte();
}
// Ok: end marker, escape or multi-byte?
if (c == INT_QUOTE) {
break main_loop;
}
switch (codes[c]) {
case 1: // backslash
c = _decodeEscaped();
break;
case 2: // 2-byte UTF
c = _decodeUtf8_2(c);
break;
case 3: // 3-byte UTF
c = _decodeUtf8_3(c);
break;
case 4: // 4-byte UTF
c = _decodeUtf8_4(c);
// Let's add first part right away:
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
outEnd = outBuf.length;
}
outBuf[outPtr++] = (char) (0xD800 | (c >> 10));
c = 0xDC00 | (c & 0x3FF);
// And let the other char output down below
break;
default:
if (c < INT_SPACE) {
_throwUnquotedSpace(c, "string value");
} else {
// Is this good enough error message?
_reportInvalidChar(c);
}
}
// Need more room?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
outEnd = outBuf.length;
}
// Ok, let's add char to output:
outBuf[outPtr++] = (char) c;
}
_textBuffer.setCurrentLength(outPtr);
}
/**
* Method called to skim through rest of unparsed String value,
* if it is not needed. This can be done bit faster if contents
* need not be stored for future access.
*
* @throws IOException for low-level read issues, or
* {@link JsonParseException} for decoding problems
*/
protected void _skipString() throws IOException
{
_tokenIncomplete = false;
// Need to be fully UTF-8 aware here:
final int[] codes = INPUT_CODES_UTF8;
main_loop:
while (true) {
int c;
ascii_loop:
while (true) {
c = _inputData.readUnsignedByte();
if (codes[c] != 0) {
break ascii_loop;
}
}
// Ok: end marker, escape or multi-byte?
if (c == INT_QUOTE) {
break main_loop;
}
switch (codes[c]) {
case 1: // backslash
_decodeEscaped();
break;
case 2: // 2-byte UTF
_skipUtf8_2();
break;
case 3: // 3-byte UTF
_skipUtf8_3();
break;
case 4: // 4-byte UTF
_skipUtf8_4();
break;
default:
if (c < INT_SPACE) {
_throwUnquotedSpace(c, "string value");
} else {
// Is this good enough error message?
_reportInvalidChar(c);
}
}
}
}
/**
* Method for handling cases where first non-space character
* of an expected value token is not legal for standard JSON content.
*
* @param c First undecoded character of unexpected (but possibly ultimate accepted) value
*
* @return Token that was successfully decoded (if successful)
*
* @throws IOException for low-level read issues, or
* {@link JsonParseException} for decoding problems
*/
protected JsonToken _handleUnexpectedValue(int c)
throws IOException
{
// Most likely an error, unless we are to allow single-quote-strings
switch (c) {
case ']':
if (!_parsingContext.inArray()) {
break;
}
// fall through
case ',':
/* !!! TODO: 08-May-2016, tatu: To support `Feature.ALLOW_MISSING_VALUES` would
* need handling here...
*/
// 11-May-2020, tatu: [core#616] No commas in root level
if (!_parsingContext.inRoot()) {
if ((_features & FEAT_MASK_ALLOW_MISSING) != 0) {
// _inputPtr--;
_nextByte = c;
return JsonToken.VALUE_NULL;
}
}
// fall through
case '}':
// Error: neither is valid at this point; valid closers have
// been handled earlier
_reportUnexpectedChar(c, "expected a value");
case '\'':
if ((_features & FEAT_MASK_ALLOW_SINGLE_QUOTES) != 0) {
return _handleApos();
}
break;
case 'N':
_matchToken("NaN", 1);
if ((_features & FEAT_MASK_NON_NUM_NUMBERS) != 0) {
return resetAsNaN("NaN", Double.NaN);
}
_reportError("Non-standard token 'NaN': enable `JsonReadFeature.ALLOW_NON_NUMERIC_NUMBERS` to allow");
break;
case 'I':
_matchToken("Infinity", 1);
if ((_features & FEAT_MASK_NON_NUM_NUMBERS) != 0) {
return resetAsNaN("Infinity", Double.POSITIVE_INFINITY);
}
_reportError("Non-standard token 'Infinity': enable `JsonReadFeature.ALLOW_NON_NUMERIC_NUMBERS` to allow");
break;
case '+': // note: '-' is taken as number
return _handleInvalidNumberStart(_inputData.readUnsignedByte(), false, true);
}
// [core#77] Try to decode most likely token
if (Character.isJavaIdentifierStart(c)) {
_reportInvalidToken(c, ""+((char) c), _validJsonTokenList());
}
// but if it doesn't look like a token:
_reportUnexpectedChar(c, "expected a valid value "+_validJsonValueList());
return null;
}
protected JsonToken _handleApos() throws IOException
{
int c = 0;
// Otherwise almost verbatim copy of _finishString()
int outPtr = 0;
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
// Here we do want to do full decoding, hence:
final int[] codes = INPUT_CODES_UTF8;
main_loop:
while (true) {
// Then the tight ascii non-funny-char loop:
ascii_loop:
while (true) {
int outEnd = outBuf.length;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
outEnd = outBuf.length;
}
do {
c = _inputData.readUnsignedByte();
if (c == '\'') {
break main_loop;
}
if ((codes[c] != 0)
// 13-Oct-2021, tatu: [core#721] Alas, regular quote is included as
// special, need to ignore here
&& (c != INT_QUOTE)) {
break ascii_loop;
}
outBuf[outPtr++] = (char) c;
} while (outPtr < outEnd);
}
switch (codes[c]) {
case 1: // backslash
c = _decodeEscaped();
break;
case 2: // 2-byte UTF
c = _decodeUtf8_2(c);
break;
case 3: // 3-byte UTF
c = _decodeUtf8_3(c);
break;
case 4: // 4-byte UTF
c = _decodeUtf8_4(c);
// Let's add first part right away:
outBuf[outPtr++] = (char) (0xD800 | (c >> 10));
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
c = 0xDC00 | (c & 0x3FF);
// And let the other char output down below
break;
default:
if (c < INT_SPACE) {
_throwUnquotedSpace(c, "string value");
}
// Is this good enough error message?
_reportInvalidChar(c);
}
// Need more room?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
// Ok, let's add char to output:
outBuf[outPtr++] = (char) c;
}
_textBuffer.setCurrentLength(outPtr);
return JsonToken.VALUE_STRING;
}
/*
* Method called if expected numeric value (due to leading sign) does not
* look like a number
*/
protected JsonToken _handleInvalidNumberStart(int ch, final boolean neg) throws IOException
{
return _handleInvalidNumberStart(ch, neg, false);
}
protected JsonToken _handleInvalidNumberStart(int ch, final boolean neg, final boolean hasSign) throws IOException
{
while (ch == 'I') {
ch = _inputData.readUnsignedByte();
String match;
if (ch == 'N') {
match = neg ? "-INF" :"+INF";
} else if (ch == 'n') {
match = neg ? "-Infinity" :"+Infinity";
} else {
break;
}
_matchToken(match, 3);
if ((_features & FEAT_MASK_NON_NUM_NUMBERS) != 0) {
return resetAsNaN(match, neg ? Double.NEGATIVE_INFINITY : Double.POSITIVE_INFINITY);
}
_reportError("Non-standard token '"+match+"': enable `JsonReadFeature.ALLOW_NON_NUMERIC_NUMBERS` to allow");
}
if (!isEnabled(JsonReadFeature.ALLOW_LEADING_PLUS_SIGN_FOR_NUMBERS.mappedFeature()) && hasSign && !neg) {
_reportUnexpectedNumberChar('+', "JSON spec does not allow numbers to have plus signs: enable `JsonReadFeature.ALLOW_LEADING_PLUS_SIGN_FOR_NUMBERS` to allow");
}
final String message = neg ?
"expected digit (0-9) to follow minus sign, for valid numeric value" :
"expected digit (0-9) for valid numeric value";
_reportUnexpectedNumberChar(ch, message);
return null;
}
protected final void _matchToken(String matchStr, int i) throws IOException
{
final int len = matchStr.length();
do {
int ch = _inputData.readUnsignedByte();
if (ch != matchStr.charAt(i)) {
_reportInvalidToken(ch, matchStr.substring(0, i));
}
} while (++i < len);
int ch = _inputData.readUnsignedByte();
if (ch >= '0' && ch != ']' && ch != '}') { // expected/allowed chars
_checkMatchEnd(matchStr, i, ch);
}
_nextByte = ch;
}
private final void _checkMatchEnd(String matchStr, int i, int ch) throws IOException {
// but actually only alphanums are problematic
char c = (char) _decodeCharForError(ch);
if (Character.isJavaIdentifierPart(c)) {
_reportInvalidToken(c, matchStr.substring(0, i));
}
}
/*
/**********************************************************
/* Internal methods, ws skipping, escape/unescape
/**********************************************************
*/
private final int _skipWS() throws IOException
{
int i = _nextByte;
if (i < 0) {
i = _inputData.readUnsignedByte();
} else {
_nextByte = -1;
}
while (true) {
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
return _skipWSComment(i);
}
return i;
} else {
// 06-May-2016, tatu: Could verify validity of WS, but for now why bother.
// ... but line number is useful thingy
if (i == INT_CR || i == INT_LF) {
++_currInputRow;
}
}
i = _inputData.readUnsignedByte();
}
}
/**
* Alternative to {@link #_skipWS} that handles possible {@link EOFException}
* caused by trying to read past the end of the {@link DataInput}.
*
* @since 2.9
*/
private final int _skipWSOrEnd() throws IOException
{
int i = _nextByte;
if (i < 0) {
try {
i = _inputData.readUnsignedByte();
} catch (EOFException e) {
return _eofAsNextChar();
}
} else {
_nextByte = -1;
}
while (true) {
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
return _skipWSComment(i);
}
return i;
} else {
// 06-May-2016, tatu: Could verify validity of WS, but for now why bother.
// ... but line number is useful thingy
if (i == INT_CR || i == INT_LF) {
++_currInputRow;
}
}
try {
i = _inputData.readUnsignedByte();
} catch (EOFException e) {
return _eofAsNextChar();
}
}
}
private final int _skipWSComment(int i) throws IOException
{
while (true) {
if (i > INT_SPACE) {
if (i == INT_SLASH) {
_skipComment();
} else if (i == INT_HASH) {
if (!_skipYAMLComment()) {
return i;
}
} else {
return i;
}
} else {
// 06-May-2016, tatu: Could verify validity of WS, but for now why bother.
// ... but line number is useful thingy
if (i == INT_CR || i == INT_LF) {
++_currInputRow;
}
/*
if ((i != INT_SPACE) && (i != INT_LF) && (i != INT_CR)) {
_throwInvalidSpace(i);
}
*/
}
i = _inputData.readUnsignedByte();
}
}
private final int _skipColon() throws IOException
{
int i = _nextByte;
if (i < 0) {
i = _inputData.readUnsignedByte();
} else {
_nextByte = -1;
}
// Fast path: colon with optional single-space/tab before and/or after:
if (i == INT_COLON) { // common case, no leading space
i = _inputData.readUnsignedByte();
if (i > INT_SPACE) { // nor trailing
if (i == INT_SLASH || i == INT_HASH) {
return _skipColon2(i, true);
}
return i;
}
if (i == INT_SPACE || i == INT_TAB) {
i = _inputData.readUnsignedByte();
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
return _skipColon2(i, true);
}
return i;
}
}
return _skipColon2(i, true); // true -> skipped colon
}
if (i == INT_SPACE || i == INT_TAB) {
i = _inputData.readUnsignedByte();
}
if (i == INT_COLON) {
i = _inputData.readUnsignedByte();
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
return _skipColon2(i, true);
}
return i;
}
if (i == INT_SPACE || i == INT_TAB) {
i = _inputData.readUnsignedByte();
if (i > INT_SPACE) {
if (i == INT_SLASH || i == INT_HASH) {
return _skipColon2(i, true);
}
return i;
}
}
return _skipColon2(i, true);
}
return _skipColon2(i, false);
}
private final int _skipColon2(int i, boolean gotColon) throws IOException
{
for (;; i = _inputData.readUnsignedByte()) {
if (i > INT_SPACE) {
if (i == INT_SLASH) {
_skipComment();
continue;
}
if (i == INT_HASH) {
if (_skipYAMLComment()) {
continue;
}
}
if (gotColon) {
return i;
}
if (i != INT_COLON) {
_reportUnexpectedChar(i, "was expecting a colon to separate field name and value");
}
gotColon = true;
} else {
// 06-May-2016, tatu: Could verify validity of WS, but for now why bother.
// ... but line number is useful thingy
if (i == INT_CR || i == INT_LF) {
++_currInputRow;
}
}
}
}
private final void _skipComment() throws IOException
{
if ((_features & FEAT_MASK_ALLOW_JAVA_COMMENTS) == 0) {
_reportUnexpectedChar('/', "maybe a (non-standard) comment? (not recognized as one since Feature 'ALLOW_COMMENTS' not enabled for parser)");
}
int c = _inputData.readUnsignedByte();
if (c == '/') {
_skipLine();
} else if (c == '*') {
_skipCComment();
} else {
_reportUnexpectedChar(c, "was expecting either '*' or '/' for a comment");
}
}
private final void _skipCComment() throws IOException
{
// Need to be UTF-8 aware here to decode content (for skipping)
final int[] codes = CharTypes.getInputCodeComment();
int i = _inputData.readUnsignedByte();
// Ok: need the matching '*/'
main_loop:
while (true) {
int code = codes[i];
if (code != 0) {
switch (code) {
case '*':
i = _inputData.readUnsignedByte();
if (i == INT_SLASH) {
return;
}
continue main_loop;
case INT_LF:
case INT_CR:
++_currInputRow;
break;
case 2: // 2-byte UTF
_skipUtf8_2();
break;
case 3: // 3-byte UTF
_skipUtf8_3();
break;
case 4: // 4-byte UTF
_skipUtf8_4();
break;
default: // e.g. -1
// Is this good enough error message?
_reportInvalidChar(i);
}
}
i = _inputData.readUnsignedByte();
}
}
private final boolean _skipYAMLComment() throws IOException
{
if ((_features & FEAT_MASK_ALLOW_YAML_COMMENTS) == 0) {
return false;
}
_skipLine();
return true;
}
/**
* Method for skipping contents of an input line; usually for CPP
* and YAML style comments.
*/
private final void _skipLine() throws IOException
{
// Ok: need to find EOF or linefeed
final int[] codes = CharTypes.getInputCodeComment();
while (true) {
int i = _inputData.readUnsignedByte();
int code = codes[i];
if (code != 0) {
switch (code) {
case INT_LF:
case INT_CR:
++_currInputRow;
return;
case '*': // nop for these comments
break;
case 2: // 2-byte UTF
_skipUtf8_2();
break;
case 3: // 3-byte UTF
_skipUtf8_3();
break;
case 4: // 4-byte UTF
_skipUtf8_4();
break;
default: // e.g. -1
if (code < 0) {
// Is this good enough error message?
_reportInvalidChar(i);
}
}
}
}
}
@Override
protected char _decodeEscaped() throws IOException
{
int c = _inputData.readUnsignedByte();
switch (c) {
// First, ones that are mapped
case 'b':
return '\b';
case 't':
return '\t';
case 'n':
return '\n';
case 'f':
return '\f';
case 'r':
return '\r';
// And these are to be returned as they are
case '"':
case '/':
case '\\':
return (char) c;
case 'u': // and finally hex-escaped
break;
default:
return _handleUnrecognizedCharacterEscape((char) _decodeCharForError(c));
}
// Ok, a hex escape. Need 4 characters
int value = 0;
for (int i = 0; i < 4; ++i) {
int ch = _inputData.readUnsignedByte();
int digit = CharTypes.charToHex(ch);
if (digit < 0) {
_reportUnexpectedChar(ch, "expected a hex-digit for character escape sequence");
}
value = (value << 4) | digit;
}
return (char) value;
}
protected int _decodeCharForError(int firstByte) throws IOException
{
int c = firstByte & 0xFF;
if (c > 0x7F) { // if >= 0, is ascii and fine as is
int needed;
// Ok; if we end here, we got multi-byte combination
if ((c & 0xE0) == 0xC0) { // 2 bytes (0x0080 - 0x07FF)
c &= 0x1F;
needed = 1;
} else if ((c & 0xF0) == 0xE0) { // 3 bytes (0x0800 - 0xFFFF)
c &= 0x0F;
needed = 2;
} else if ((c & 0xF8) == 0xF0) {
// 4 bytes; double-char with surrogates and all...
c &= 0x07;
needed = 3;
} else {
_reportInvalidInitial(c & 0xFF);
needed = 1; // never gets here
}
int d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = (c << 6) | (d & 0x3F);
if (needed > 1) { // needed == 1 means 2 bytes total
d = _inputData.readUnsignedByte(); // 3rd byte
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = (c << 6) | (d & 0x3F);
if (needed > 2) { // 4 bytes? (need surrogates)
d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = (c << 6) | (d & 0x3F);
}
}
}
return c;
}
/*
/**********************************************************
/* Internal methods,UTF8 decoding
/**********************************************************
*/
private final int _decodeUtf8_2(int c) throws IOException
{
int d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
return ((c & 0x1F) << 6) | (d & 0x3F);
}
private final int _decodeUtf8_3(int c1) throws IOException
{
c1 &= 0x0F;
int d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
int c = (c1 << 6) | (d & 0x3F);
d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = (c << 6) | (d & 0x3F);
return c;
}
/**
* @return Character value <b>minus 0x10000</c>; this so that caller
* can readily expand it to actual surrogates
*/
private final int _decodeUtf8_4(int c) throws IOException
{
int d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = ((c & 0x07) << 6) | (d & 0x3F);
d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = (c << 6) | (d & 0x3F);
d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
/* note: won't change it to negative here, since caller
* already knows it'll need a surrogate
*/
return ((c << 6) | (d & 0x3F)) - 0x10000;
}
private final void _skipUtf8_2() throws IOException
{
int c = _inputData.readUnsignedByte();
if ((c & 0xC0) != 0x080) {
_reportInvalidOther(c & 0xFF);
}
}
/* Alas, can't heavily optimize skipping, since we still have to
* do validity checks...
*/
private final void _skipUtf8_3() throws IOException
{
//c &= 0x0F;
int c = _inputData.readUnsignedByte();
if ((c & 0xC0) != 0x080) {
_reportInvalidOther(c & 0xFF);
}
c = _inputData.readUnsignedByte();
if ((c & 0xC0) != 0x080) {
_reportInvalidOther(c & 0xFF);
}
}
private final void _skipUtf8_4() throws IOException
{
int d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
d = _inputData.readUnsignedByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
}
/*
/**********************************************************
/* Internal methods, error reporting
/**********************************************************
*/
protected void _reportInvalidToken(int ch, String matchedPart) throws IOException
{
_reportInvalidToken(ch, matchedPart, _validJsonTokenList());
}
protected void _reportInvalidToken(int ch, String matchedPart, String msg)
throws IOException
{
StringBuilder sb = new StringBuilder(matchedPart);
/* Let's just try to find what appears to be the token, using
* regular Java identifier character rules. It's just a heuristic,
* nothing fancy here (nor fast).
*/
while (true) {
char c = (char) _decodeCharForError(ch);
if (!Character.isJavaIdentifierPart(c)) {
break;
}
sb.append(c);
ch = _inputData.readUnsignedByte();
}
_reportError("Unrecognized token '"+sb.toString()+"': was expecting "+msg);
}
protected void _reportInvalidChar(int c)
throws JsonParseException
{
// Either invalid WS or illegal UTF-8 start char
if (c < INT_SPACE) {
_throwInvalidSpace(c);
}
_reportInvalidInitial(c);
}
protected void _reportInvalidInitial(int mask)
throws JsonParseException
{
_reportError("Invalid UTF-8 start byte 0x"+Integer.toHexString(mask));
}
private void _reportInvalidOther(int mask)
throws JsonParseException
{
_reportError("Invalid UTF-8 middle byte 0x"+Integer.toHexString(mask));
}
/*
/**********************************************************
/* Internal methods, binary access
/**********************************************************
*/
/**
* Efficient handling for incremental parsing of base64-encoded
* textual content.
*
* @param b64variant Type of base64 encoding expected in context
*
* @return Fully decoded value of base64 content
*
* @throws IOException for low-level read issues, or
* {@link JsonParseException} for decoding problems (invalid content)
*/
@SuppressWarnings("resource")
protected final byte[] _decodeBase64(Base64Variant b64variant) throws IOException
{
ByteArrayBuilder builder = _getByteArrayBuilder();
//main_loop:
while (true) {
// first, we'll skip preceding white space, if any
int ch;
do {
ch = _inputData.readUnsignedByte();
} while (ch <= INT_SPACE);
int bits = b64variant.decodeBase64Char(ch);
if (bits < 0) { // reached the end, fair and square?
if (ch == INT_QUOTE) {
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 0);
if (bits < 0) { // white space to skip
continue;
}
}
int decodedData = bits;
// then second base64 char; can't get padding yet, nor ws
ch = _inputData.readUnsignedByte();
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
bits = _decodeBase64Escape(b64variant, ch, 1);
}
decodedData = (decodedData << 6) | bits;
// third base64 char; can be padding, but not ws
ch = _inputData.readUnsignedByte();
bits = b64variant.decodeBase64Char(ch);
// First branch: can get padding (-> 1 byte)
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// could also just be 'missing' padding
if (ch == INT_QUOTE) {
decodedData >>= 4;
builder.append(decodedData);
if (b64variant.requiresPaddingOnRead()) {
_handleBase64MissingPadding(b64variant);
}
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 2);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
ch = _inputData.readUnsignedByte();
if (!b64variant.usesPaddingChar(ch)) {
if ((ch != INT_BACKSLASH)
|| _decodeBase64Escape(b64variant, ch, 3) != Base64Variant.BASE64_VALUE_PADDING) {
throw reportInvalidBase64Char(b64variant, ch, 3, "expected padding character '"+b64variant.getPaddingChar()+"'");
}
}
// Got 12 bits, only need 8, need to shift
decodedData >>= 4;
builder.append(decodedData);
continue;
}
}
// Nope, 2 or 3 bytes
decodedData = (decodedData << 6) | bits;
// fourth and last base64 char; can be padding, but not ws
ch = _inputData.readUnsignedByte();
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// could also just be 'missing' padding
if (ch == INT_QUOTE) {
decodedData >>= 2;
builder.appendTwoBytes(decodedData);
if (b64variant.requiresPaddingOnRead()) {
_handleBase64MissingPadding(b64variant);
}
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 3);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
/* With padding we only get 2 bytes; but we have
* to shift it a bit so it is identical to triplet
* case with partial output.
* 3 chars gives 3x6 == 18 bits, of which 2 are
* dummies, need to discard:
*/
decodedData >>= 2;
builder.appendTwoBytes(decodedData);
continue;
}
}
// otherwise, our triplet is now complete
decodedData = (decodedData << 6) | bits;
builder.appendThreeBytes(decodedData);
}
}
/*
/**********************************************************
/* Improved location updating (refactored in 2.7)
/**********************************************************
*/
@Override
public JsonLocation currentLocation() {
// No column tracking since we do not have pointers, DataInput has no offset
final int col = -1;
return new JsonLocation(_contentReference(), -1L, -1L,
_currInputRow, col);
}
// Since we only know row, may as well return currentLocation()
@Override // @since 2.17
protected JsonLocation _currentLocationMinusOne() {
return currentLocation();
}
@Override
public JsonLocation currentTokenLocation() {
// 03-Jan-2020, tatu: Should probably track this, similar to how
// streaming parsers do it, but... not done yet
// if (_currToken == JsonToken.FIELD_NAME) {
// return new JsonLocation(_getSourceReference(),
// -1L, -1L, _nameStartRow, _nameStartCol);
// }
// No column tracking since we do not have pointers, DataInput has no offset
return new JsonLocation(_contentReference(), -1L, -1L, _tokenInputRow, -1);
}
/*
/**********************************************************
/* Internal methods, other
/**********************************************************
*/
private void _closeScope(int i) throws IOException
{
if (i == INT_RBRACKET) {
if (!_parsingContext.inArray()) {
_reportMismatchedEndMarker(i, '}');
}
_parsingContext = _parsingContext.clearAndGetParent();
_updateToken(JsonToken.END_ARRAY);
}
if (i == INT_RCURLY) {
if (!_parsingContext.inObject()) {
_reportMismatchedEndMarker(i, ']');
}
_parsingContext = _parsingContext.clearAndGetParent();
_updateToken(JsonToken.END_OBJECT);
}
}
/**
* Helper method needed to fix [core#148], masking of 0x00 character
*/
private final static int pad(int q, int bytes) {
return (bytes == 4) ? q : (q | (-1 << (bytes << 3)));
}
}