/*
* Copyright 2003-2014 the original author or authors.
*
* Licensed 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.codehaus.groovy.classgen.asm;
import org.codehaus.groovy.control.BytecodeProcessor;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.util.TraceClassVisitor;
import java.io.PrintWriter;
import java.io.Writer;
/**
* An utility class which can be used in test cases to dump generated bytecode.
*
* @author Cédric Champeau
* @since 2.4.0
*/
public class BytecodeDumper implements BytecodeProcessor {
public static final BytecodeDumper STANDARD_ERR = new BytecodeDumper(new PrintWriter(System.err));
private final Writer out;
public BytecodeDumper(final Writer out) {
this.out = out;
}
@Override
public byte[] processBytecode(final String name, final byte[] original) {
PrintWriter pw = out instanceof PrintWriter ? (PrintWriter) out : new PrintWriter(out);
TraceClassVisitor visitor = new TraceClassVisitor(pw);
ClassReader reader = new ClassReader(original);
reader.accept(visitor, 0);
return original;
}
}