NumberSerializers.java
package com.fasterxml.jackson.databind.ser.std;
import java.io.IOException;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.util.Map;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.io.NumberOutput;
import com.fasterxml.jackson.core.type.WritableTypeId;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper;
import com.fasterxml.jackson.databind.jsontype.TypeSerializer;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;
/**
* Container class for serializers used for handling standard JDK-provided
* primitve number types and their wrapper counterparts (like {@link java.lang.Integer}).
*/
@SuppressWarnings("serial")
public class NumberSerializers {
protected NumberSerializers() { }
public static void addAll(Map<String, JsonSerializer<?>> allDeserializers) {
allDeserializers.put(Integer.class.getName(), new IntegerSerializer(Integer.class));
allDeserializers.put(Integer.TYPE.getName(), new IntegerSerializer(Integer.TYPE));
allDeserializers.put(Long.class.getName(), new LongSerializer(Long.class));
allDeserializers.put(Long.TYPE.getName(), new LongSerializer(Long.TYPE));
allDeserializers.put(Byte.class.getName(), IntLikeSerializer.instance);
allDeserializers.put(Byte.TYPE.getName(), IntLikeSerializer.instance);
allDeserializers.put(Short.class.getName(), ShortSerializer.instance);
allDeserializers.put(Short.TYPE.getName(), ShortSerializer.instance);
// Numbers, limited length floating point
allDeserializers.put(Double.class.getName(), new DoubleSerializer(Double.class));
allDeserializers.put(Double.TYPE.getName(), new DoubleSerializer(Double.TYPE));
allDeserializers.put(Float.class.getName(), FloatSerializer.instance);
allDeserializers.put(Float.TYPE.getName(), FloatSerializer.instance);
}
/*
/**********************************************************
/* Shared base class
/**********************************************************
*/
/**
* Shared base class for actual primitive/wrapper number serializers.
* Note that this class is not meant as general-purpose base class nor
* is it part of public API: you may extend it with the caveat that not
* being part of public API its implementation and interfaces may change
* in minor releases; however deprecation markers will be used to allow
* code evolution.
*<p>
* NOTE: {@code public} since 2.10: previously had {@code protected} access.
*/
public abstract static class Base<T> extends StdScalarSerializer<T>
implements ContextualSerializer
{
protected final JsonParser.NumberType _numberType;
protected final String _schemaType;
protected final boolean _isInt;
protected Base(Class<?> cls, JsonParser.NumberType numberType,
String schemaType) {
super(cls, false);
_numberType = numberType;
_schemaType = schemaType;
_isInt = (numberType == JsonParser.NumberType.INT)
|| (numberType == JsonParser.NumberType.LONG)
|| (numberType == JsonParser.NumberType.BIG_INTEGER);
}
/**
* @deprecated Since 2.15
*/
@Deprecated
@Override
public JsonNode getSchema(SerializerProvider provider, Type typeHint) {
return createSchemaNode(_schemaType, true);
}
@Override
public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor,
JavaType typeHint) throws JsonMappingException
{
if (_isInt) {
visitIntFormat(visitor, typeHint, _numberType);
} else {
visitFloatFormat(visitor, typeHint, _numberType);
}
}
@Override
public JsonSerializer<?> createContextual(SerializerProvider prov,
BeanProperty property) throws JsonMappingException
{
JsonFormat.Value format = findFormatOverrides(prov, property, handledType());
if (format != null) {
switch (format.getShape()) {
case STRING:
if (((Class<?>) handledType()) == BigDecimal.class) {
return NumberSerializer.bigDecimalAsStringSerializer();
}
return ToStringSerializer.instance;
default:
}
}
return this;
}
}
/*
*************************************************************
* Concrete serializers, numerics
*************************************************************
*/
@JacksonStdImpl
public static class ShortSerializer extends Base<Object> {
final static ShortSerializer instance = new ShortSerializer();
public ShortSerializer() {
super(Short.class, JsonParser.NumberType.INT, "integer");
}
@Override
public void serialize(Object value, JsonGenerator gen,
SerializerProvider provider) throws IOException {
gen.writeNumber(((Short) value).shortValue());
}
}
/**
* This is the special serializer for regular {@link java.lang.Integer}s
* (and primitive ints)
* <p>
* Since this is one of "natural" types, no type information is ever included
* on serialization (unlike for most scalar types, except for {@code double}).
* <p>
* NOTE: as of 2.6, generic signature changed to Object, to avoid generation
* of bridge methods.
*/
@JacksonStdImpl
public static class IntegerSerializer extends Base<Object> {
public IntegerSerializer(Class<?> type) {
super(type, JsonParser.NumberType.INT, "integer");
}
@Override
public void serialize(Object value, JsonGenerator gen,
SerializerProvider provider) throws IOException {
gen.writeNumber(((Integer) value).intValue());
}
// IMPORTANT: copied from `NonTypedScalarSerializerBase`
@Override
public void serializeWithType(Object value, JsonGenerator gen,
SerializerProvider provider, TypeSerializer typeSer)
throws IOException {
// no type info, just regular serialization
serialize(value, gen, provider);
}
}
/**
* Similar to {@link IntegerSerializer}, but will not cast to Integer:
* instead, cast is to {@link java.lang.Number}, and conversion is by
* calling {@link java.lang.Number#intValue}.
*/
@JacksonStdImpl
public static class IntLikeSerializer extends Base<Object> {
final static IntLikeSerializer instance = new IntLikeSerializer();
public IntLikeSerializer() {
super(Number.class, JsonParser.NumberType.INT, "integer");
}
@Override
public void serialize(Object value, JsonGenerator gen,
SerializerProvider provider) throws IOException {
gen.writeNumber(((Number) value).intValue());
}
}
@JacksonStdImpl
public static class LongSerializer extends Base<Object> {
public LongSerializer(Class<?> cls) {
super(cls, JsonParser.NumberType.LONG, "integer");
}
@Override
public void serialize(Object value, JsonGenerator gen,
SerializerProvider provider) throws IOException {
gen.writeNumber(((Long) value).longValue());
}
}
@JacksonStdImpl
public static class FloatSerializer extends Base<Object> {
final static FloatSerializer instance = new FloatSerializer();
public FloatSerializer() {
super(Float.class, JsonParser.NumberType.FLOAT, "number");
}
@Override
public void serialize(Object value, JsonGenerator gen,
SerializerProvider provider) throws IOException {
gen.writeNumber(((Float) value).floatValue());
}
}
/**
* This is the special serializer for regular {@link java.lang.Double}s (and
* primitive doubles)
* <p>
* Since this is one of "native" types, no type information is ever included
* on serialization (unlike for most scalar types other than {@code long}).
*/
@JacksonStdImpl
public static class DoubleSerializer extends Base<Object> {
public DoubleSerializer(Class<?> cls) {
super(cls, JsonParser.NumberType.DOUBLE, "number");
}
@Override
public void serialize(Object value, JsonGenerator gen,
SerializerProvider provider) throws IOException
{
gen.writeNumber(((Double) value).doubleValue());
}
// IMPORTANT: copied from `NonTypedScalarSerializerBase`
@Override
public void serializeWithType(Object value, JsonGenerator g,
SerializerProvider provider, TypeSerializer typeSer)
throws IOException
{
// 08-Feb-2018, tatu: [databind#2236], NaN values need special care
Double d = (Double) value;
if (NumberOutput.notFinite(d)) {
WritableTypeId typeIdDef = typeSer.writeTypePrefix(g,
// whether to indicate it's number or string is arbitrary; important it is scalar
typeSer.typeId(value, JsonToken.VALUE_NUMBER_FLOAT));
g.writeNumber(d);
typeSer.writeTypeSuffix(g, typeIdDef);
} else {
g.writeNumber(d);
}
}
@Deprecated // since 2.13, call NumberOutput.notFinite() directly
public static boolean notFinite(double value) {
return NumberOutput.notFinite(value);
}
}
}