ManipulationVisitor.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.felix.ipojo.manipulator;

import org.apache.felix.ipojo.metadata.Element;

/**
 * Visit manipulation results.
 *
 * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a>
 */
public interface ManipulationVisitor {

    /**
     * Accept a manipulation result for the given component metadata.
     * @param metadata component's metadata (from XML or annotations)
     * @return a ManipulationResultVisitor if interested in theses manipulation results
     */
    ManipulationResultVisitor visitManipulationResult(Element metadata);

    /**
     * Visit metadata not associated with a component (ie no bytecode manipulation needed).
     * @param metadata usually {@code instance}/{@code composite} metadata
     */
    void visitMetadata(Element metadata);

    /**
     * Called when all metadata have been processed.
     */
    void visitEnd();
}