MethodParameters.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.bcel.classfile;
import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Iterator;
import java.util.stream.Stream;
import org.apache.bcel.Const;
/**
* This class represents a MethodParameters attribute.
*
* @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.24"> The class File Format :
* The MethodParameters Attribute</a>
* @since 6.0
*/
public class MethodParameters extends Attribute implements Iterable<MethodParameter> {
/**
* Empty array.
*/
private static final MethodParameter[] EMPTY_METHOD_PARAMETER_ARRAY = {};
private MethodParameter[] parameters = EMPTY_METHOD_PARAMETER_ARRAY;
MethodParameters(final int nameIndex, final int length, final DataInput input, final ConstantPool constantPool) throws IOException {
super(Const.ATTR_METHOD_PARAMETERS, nameIndex, length, constantPool);
final int parameterCount = input.readUnsignedByte();
parameters = new MethodParameter[parameterCount];
for (int i = 0; i < parameterCount; i++) {
parameters[i] = new MethodParameter(input);
}
}
@Override
public void accept(final Visitor v) {
v.visitMethodParameters(this);
}
@Override
public Attribute copy(final ConstantPool constantPool) {
final MethodParameters c = (MethodParameters) clone();
c.parameters = new MethodParameter[parameters.length];
Arrays.setAll(c.parameters, i -> parameters[i].copy());
c.setConstantPool(constantPool);
return c;
}
/**
* Dump method parameters attribute to file stream in binary format.
*
* @param file Output file stream
* @throws IOException if an I/O error occurs.
*/
@Override
public void dump(final DataOutputStream file) throws IOException {
super.dump(file);
file.writeByte(parameters.length);
for (final MethodParameter parameter : parameters) {
parameter.dump(file);
}
}
public MethodParameter[] getParameters() {
return parameters;
}
@Override
public Iterator<MethodParameter> iterator() {
return Stream.of(parameters).iterator();
}
public void setParameters(final MethodParameter[] parameters) {
this.parameters = parameters;
}
}