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.commons.transaction.file;
018    
019    /**
020     * Maps transaction ids to paths and back.
021     * 
022     * @version $Id: TransactionIdToPathMapper.java 493632 2007-01-07 01:57:31Z joerg $
023     * @since 1.2
024     */
025    public interface TransactionIdToPathMapper {
026    
027        /**
028         * Maps the transaction id object to a path string. 
029         * 
030         * @param txId the transaction id
031         * @return the path string
032         */
033        String getPathForId(Object txId);
034        
035        /**
036         * Maps the path string to a transaction id object. 
037         * 
038         * @param path the path
039         * @return the path string
040         */
041        Object getIdForPath(String path);
042        
043    }