buildutils/no-package-cycles-enforcer-rule/src/main/java/org/apache/axiom/buildutils/enforcer/MethodProcessor.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.axiom.buildutils.enforcer;

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

final class MethodProcessor extends MethodVisitor {
    private final ReferenceProcessor referenceProcessor;

    MethodProcessor(ReferenceProcessor referenceProcessor) {
        super(Opcodes.ASM5);
        this.referenceProcessor = referenceProcessor;
    }

    @Override
    public void visitLocalVariable(String name, String desc, String signature, Label start,
            Label end, int index) {
        referenceProcessor.processType(Type.getType(desc));
    }

    @Override
    public void visitTypeInsn(int opcode, String type) {
        referenceProcessor.processType(Type.getObjectType(type));
    }

    @Override
    public void visitFieldInsn(int opcode, String owner, String name, String desc) {
        referenceProcessor.processType(Type.getObjectType(owner));
        referenceProcessor.processType(Type.getMethodType(desc));
    }

    @Override
    public void visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) {
        // AspectJ inter-method dispatch methods are defined on the aspect and the first argument
        // is "this". We need to ignore the reference to the aspect here.
        if (!name.startsWith("ajc$interMethodDispatch")) {
            referenceProcessor.processType(Type.getObjectType(owner));
        }
        referenceProcessor.processType(Type.getMethodType(desc));
    }

    @Override
    public void visitTryCatchBlock(Label start, Label end, Label handler, String type) {
        if (type != null) {
            referenceProcessor.processType(Type.getObjectType(type));
        }
    }
}