/*
 * 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.netbeans.modules.j2ee.metadata.model.api;

/**
 * Represents action executed against the model.
 *
 * @author Andrei Badea
 * @since 1.2
 */
public interface MetadataModelAction<T, R> {

    /**
     * Invoked in the context of the model.
     *
     * @param  metadata the model's metadata.
     * @return any value. It will be returned by {@link MetadataModel#runReadAction}.
     * @throws Exception any <code>Exception</code>, which will be rethrown
     *         by {@link MetadataModel#runReadAction}.
     */
    R run(T metadata) throws Exception;
}
