/*
* Copyright 2010 Henry Coles
*
* 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.pitest.mutationtest.engine.gregor.mutators.experimental;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.pitest.mutationtest.engine.MutationIdentifier;
import org.pitest.mutationtest.engine.gregor.MethodInfo;
import org.pitest.mutationtest.engine.gregor.MethodMutatorFactory;
import org.pitest.mutationtest.engine.gregor.MutationContext;
public enum RemoveIncrementsMutator implements MethodMutatorFactory {
REMOVE_INCREMENTS_MUTATOR;
@Override
public MethodVisitor create(final MutationContext context,
final MethodInfo methodInfo, final MethodVisitor methodVisitor) {
return new RemoveIncrementsMethodVisitor(this, context, methodVisitor);
}
@Override
public String getGloballyUniqueId() {
return this.getClass().getName();
}
@Override
public String getName() {
return name();
}
}
class RemoveIncrementsMethodVisitor extends MethodVisitor {
private final MethodMutatorFactory factory;
private final MutationContext context;
RemoveIncrementsMethodVisitor(final MethodMutatorFactory factory,
final MutationContext context, final MethodVisitor delegateMethodVisitor) {
super(Opcodes.ASM5, delegateMethodVisitor);
this.factory = factory;
this.context = context;
}
@Override
public void visitIincInsn(final int var, final int increment) {
final MutationIdentifier newId = this.context.registerMutation(
this.factory, "Removed increment " + increment);
if (this.context.shouldMutate(newId)) {
this.mv.visitInsn(Opcodes.NOP);
} else {
this.mv.visitIincInsn(var, increment);
}
}
}