de.unisb.cs.st.javalanche.mutation.bytecodeMutations.removeSystemExit.RemoveSystemExitMethodAdapter.java Source code

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Here is the source code for de.unisb.cs.st.javalanche.mutation.bytecodeMutations.removeSystemExit.RemoveSystemExitMethodAdapter.java

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/*
* Copyright (C) 2011 Saarland University
* 
* This file is part of Javalanche.
* 
* Javalanche is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* 
* Javalanche 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 Public License for more details.
* 
* You should have received a copy of the GNU Lesser Public License
* along with Javalanche.  If not, see <http://www.gnu.org/licenses/>.
*/
package de.unisb.cs.st.javalanche.mutation.bytecodeMutations.removeSystemExit;

import org.apache.log4j.Logger;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodAdapter;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import de.unisb.cs.st.javalanche.mutation.bytecodeMutations.MutationMarker;

public class RemoveSystemExitMethodAdapter extends MethodAdapter {

    private static Logger logger = Logger.getLogger(RemoveSystemExitMethodAdapter.class);

    public RemoveSystemExitMethodAdapter(MethodVisitor mv) {
        super(mv);
    }

    @Override
    public void visitMethodInsn(int opcode, String owner, String name, String desc) {
        if (name.equals("exita") && owner.equals("java/lang/System")) {
            logger.info("Replacing System.exit ");

            Label mutationStartLabel = new Label();
            mutationStartLabel.info = new MutationMarker(true);
            mv.visitLabel(mutationStartLabel);

            mv.visitInsn(Opcodes.POP);
            mv.visitTypeInsn(Opcodes.NEW, "java/lang/RuntimeException");
            mv.visitInsn(Opcodes.DUP);
            mv.visitLdcInsn("Replaced System Exit");
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/RuntimeException", "<init>",
                    "(Ljava/lang/String;)V");
            mv.visitInsn(Opcodes.ATHROW);

            Label mutationEndLabel = new Label();
            mutationEndLabel.info = new MutationMarker(false);
            mv.visitLabel(mutationEndLabel);

        } else {
            super.visitMethodInsn(opcode, owner, name, desc);
        }
    }

}