javassist.tools.Dump Maven / Gradle / Ivy
/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later,
* or the Apache License Version 2.0.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.tools;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.PrintWriter;
import javassist.bytecode.ClassFile;
import javassist.bytecode.ClassFilePrinter;
/**
* Dump is a tool for viewing the class definition in the given
* class file. Unlike the JDK javap tool, Dump works even if
* the class file is broken.
*
* For example,
*
% java javassist.tools.Dump foo.class
*
* prints the contents of the constant pool and the list of methods
* and fields.
*/
public class Dump {
private Dump() {}
/**
* Main method.
*
* @param args args[0] is the class file name.
*/
public static void main(String[] args) throws Exception {
if (args.length != 1) {
System.err.println("Usage: java Dump ");
return;
}
DataInputStream in = new DataInputStream(
new FileInputStream(args[0]));
ClassFile w = new ClassFile(in);
PrintWriter out = new PrintWriter(System.out, true);
out.println("*** constant pool ***");
w.getConstPool().print(out);
out.println();
out.println("*** members ***");
ClassFilePrinter.print(w, out);
}
}