001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.activemq.store;
018    
019    import java.io.IOException;
020    import java.util.Iterator;
021    
022    import org.apache.activemq.util.ByteSequence;
023    
024    /**
025     * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
026     */
027    public interface PList {
028        String getName();
029    
030        void destroy() throws IOException;
031    
032        Object addFirst(String id, ByteSequence bs) throws IOException;
033    
034        Object addLast(String id, ByteSequence bs) throws IOException;
035    
036        boolean remove(Object position) throws IOException;
037    
038        boolean isEmpty();
039    
040        PListIterator iterator() throws IOException;
041    
042        long size();
043    
044        public interface PListIterator extends Iterator<PListEntry> {
045            void release();
046        }
047    }