org.evosuite.instrumentation.RemoveFinalMethodAdapter.java Source code

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Here is the source code for org.evosuite.instrumentation.RemoveFinalMethodAdapter.java

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/**
 * Copyright (C) 2011,2012 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 *
 * EvoSuite 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 Public License for more details.
 *
 * You should have received a copy of the GNU Public License along with
 * EvoSuite. If not, see <http://www.gnu.org/licenses/>.
 */
/**
 * 
 */
package org.evosuite.instrumentation;

import java.util.List;

import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;

/**
 * <p>RemoveFinalMethodAdapter class.</p>
 *
 * @author Gordon Fraser
 */
public class RemoveFinalMethodAdapter extends MethodVisitor {

    private final List<String> finalFields;

    private final String className;

    /**
     * <p>Constructor for RemoveFinalMethodAdapter.</p>
     *
     * @param mv a {@link org.objectweb.asm.MethodVisitor} object.
     * @param className a {@link java.lang.String} object.
     * @param finalFields a {@link java.util.List} object.
     */
    public RemoveFinalMethodAdapter(String className, MethodVisitor mv, List<String> finalFields) {
        super(Opcodes.ASM4, mv);
        this.finalFields = finalFields;
        this.className = className;
    }

    /* (non-Javadoc)
     * @see org.objectweb.asm.MethodAdapter#visitFieldInsn(int, java.lang.String, java.lang.String, java.lang.String)
     */
    /** {@inheritDoc} */
    @Override
    public void visitFieldInsn(int opcode, String owner, String name, String desc) {
        if ((opcode == Opcodes.PUTFIELD || opcode == Opcodes.PUTSTATIC) && owner.equals(className)) {

            if (!finalFields.contains(name)) {
                //System.out.println("Keeping non-final field " + name + " in class "
                //        + owner);
                super.visitFieldInsn(opcode, owner, name, desc);
            } else {
                //System.out.println("Omitting final field " + name + " in class " + owner);
                Type type = Type.getType(desc);
                if (type.getSize() == 1)
                    super.visitInsn(Opcodes.POP);
                else if (type.getSize() == 2)
                    super.visitInsn(Opcodes.POP2);
                if (opcode == Opcodes.PUTFIELD)
                    super.visitInsn(Opcodes.POP);
            }
        } else {
            //if (!owner.equals(className))
            //   System.out.println("Mismatch: " + className + " / " + owner);
            super.visitFieldInsn(opcode, owner, name, desc);
        }
    }
}