de.bodden.tamiflex.playout.transformation.clazz.ClassGetFieldTransformation.java Source code

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Here is the source code for de.bodden.tamiflex.playout.transformation.clazz.ClassGetFieldTransformation.java

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/*******************************************************************************
 * Copyright (c) 2010 Eric Bodden.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Andreas Sewe - initial implementation
 ******************************************************************************/
package de.bodden.tamiflex.playout.transformation.clazz;

import static de.bodden.tamiflex.playout.rt.Kind.ClassGetField;
import static org.objectweb.asm.Opcodes.ALOAD;
import static org.objectweb.asm.Opcodes.GETSTATIC;
import static org.objectweb.asm.Opcodes.INVOKESTATIC;
import static org.objectweb.asm.Opcodes.IRETURN;
import static org.objectweb.asm.Opcodes.RETURN;

import org.objectweb.asm.MethodAdapter;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.Method;

import de.bodden.tamiflex.playout.rt.Kind;
import de.bodden.tamiflex.playout.transformation.AbstractTransformation;

public class ClassGetFieldTransformation extends AbstractTransformation {

    public ClassGetFieldTransformation() {
        super(Class.class, new Method("getField", "(Ljava/lang/String;)Ljava/lang/reflect/Field;"));
    }

    @Override
    protected MethodVisitor getMethodVisitor(MethodVisitor parent) {
        return new MethodAdapter(parent) {

            @Override
            public void visitInsn(int opcode) {
                if (IRETURN <= opcode && opcode <= RETURN) {
                    mv.visitInsn(Opcodes.DUP); //duplicate return value (the Field instance)
                    mv.visitFieldInsn(GETSTATIC, "de/bodden/tamiflex/playout/rt/Kind", ClassGetField.name(),
                            Type.getDescriptor(Kind.class));
                    mv.visitVarInsn(ALOAD, 0); // Load Class instance
                    mv.visitMethodInsn(INVOKESTATIC, "de/bodden/tamiflex/playout/rt/ReflLogger",
                            "fieldMethodInvoke",
                            "(Ljava/lang/reflect/Field;Lde/bodden/tamiflex/playout/rt/Kind;Ljava/lang/Class;)V");
                }
                super.visitInsn(opcode);
            }

        };
    }

}