/*
* Copyright (C) 2009-2010 Mathias Doenitz
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.parboiled.transform;
import org.jetbrains.annotations.NotNull;
import org.objectweb.asm.tree.InsnNode;
import org.objectweb.asm.tree.MethodInsnNode;
import org.objectweb.asm.tree.VarInsnNode;
import static org.objectweb.asm.Opcodes.*;
import static org.parboiled.transform.AsmUtils.createArgumentLoaders;
/**
* Replaces the method code with a simple call to the super method.
*/
class BodyWithSuperCallReplacer implements RuleMethodProcessor {
public boolean appliesTo(@NotNull ParserClassNode classNode, @NotNull RuleMethod method) {
return !method.isBodyRewritten() && method.getOwnerClass() == classNode.getParentClass();
}
public void process(@NotNull ParserClassNode classNode, @NotNull RuleMethod method) throws Exception {
// replace all method code with a simple call to the super method
method.instructions.clear();
method.instructions.add(new VarInsnNode(ALOAD, 0));
method.instructions.add(createArgumentLoaders(method.desc));
method.instructions.add(new MethodInsnNode(INVOKESPECIAL,
classNode.getParentType().getInternalName(), method.name, method.desc));
method.instructions.add(new InsnNode(ARETURN));
}
}