/**
* EasyBeans
* Copyright (C) 2006 Bull S.A.S.
* Contact: easybeans@ow2.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* --------------------------------------------------------------------------
* $Id: JCheckClassAdapter.java 5369 2010-02-24 14:58:19Z benoitf $
* --------------------------------------------------------------------------
*/
package org.ow2.easybeans.tests.enhancer;
import java.util.List;
import org.ow2.easybeans.asm.ClassReader;
import org.ow2.easybeans.asm.ClassVisitor;
import org.ow2.easybeans.asm.Opcodes;
import org.ow2.easybeans.asm.Type;
import org.ow2.easybeans.asm.tree.ClassNode;
import org.ow2.easybeans.asm.tree.MethodNode;
import org.ow2.easybeans.asm.tree.analysis.Analyzer;
import org.ow2.easybeans.asm.tree.analysis.AnalyzerException;
import org.ow2.easybeans.asm.tree.analysis.Frame;
import org.ow2.easybeans.asm.tree.analysis.SimpleVerifier;
import org.ow2.easybeans.asm.util.CheckClassAdapter;
import org.ow2.easybeans.asm.util.TraceMethodVisitor;
/**
* Checks a class.
* @author Florent Benoit
*/
public class JCheckClassAdapter extends CheckClassAdapter {
/**
* Start of int (debug traces).
*/
private static final int START_INT = 100000;
/**
* Constructs a new JCheckClassAdapter.
* @param cv the class visitor to which this adapter must delegate calls.
*/
public JCheckClassAdapter(final ClassVisitor cv) {
super(cv);
}
/**
* Check a set of bytes.
* @param bytes representing a class.
* @throws AnalyzerException if class is incorrect.
*/
public static void checkClass(final byte[] bytes) throws AnalyzerException {
ClassReader cr = new ClassReader(bytes);
ClassNode cn = new ClassNode();
cr.accept(new CheckClassAdapter(cn), ClassReader.SKIP_DEBUG);
List methods = cn.methods;
for (int i = 0; i < methods.size(); ++i) {
MethodNode method = (MethodNode) methods.get(i);
if (method.instructions.size() > 0) {
Analyzer a = new Analyzer(new SimpleVerifier(Type.getType("L" + cn.name + ";"), Type.getType("L" + cn.superName
+ ";"), (cn.access & Opcodes.ACC_INTERFACE) != 0));
AnalyzerException throwE = null;
try {
a.analyze(cn.name, method);
continue;
} catch (AnalyzerException e) {
throwE = e;
}
final Frame[] frames = a.getFrames();
if (throwE != null) {
System.out.println(method.name + method.desc);
TraceMethodVisitor mv = new TraceMethodVisitor() {
@Override
public void visitMaxs(final int maxStack, final int maxLocals) {
for (int i = 0; i < text.size(); ++i) {
String s;
if (frames[i] == null) {
s = "null";
} else {
s = frames[i].toString();
}
while (s.length() < maxStack + maxLocals + 1) {
s += " ";
}
System.out.print(Integer.toString(i + START_INT).substring(1));
System.out.print(" " + s + " : " + text.get(i));
}
System.out.println();
}
};
for (int j = 0; j < method.instructions.size(); ++j) {
method.instructions.get(j).accept(mv);
}
mv.visitMaxs(method.maxStack, method.maxLocals);
throw throwE;
}
}
}
}
}