001    // Copyright 2007 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.hivemind.definition;
016    
017    /**
018     * Defines a contribution to a {@link ConfigurationPointDefinition}.
019     * The actual contribution is done by an instance of {@link Contribution}.
020     * 
021     * @author Huegen
022     */
023    public interface ContributionDefinition extends ExtensionDefinition
024    {
025        /**
026         * @return  the contribution implementation.
027         */
028        public Contribution getContribution();
029    
030        /**
031         * @return  true if the contribution is the initial one to be processed first. Only one
032         *          contribution of a configuration point is allowed to return true here. 
033         */
034        public boolean isInitalContribution();
035    }