# TaskDescriptionRepositoryFactory.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.synapse.task;

    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;

    import java.util.HashMap;
    import java.util.Map;

    public class TaskDescriptionRepositoryFactory {

        private static final Log log = LogFactory.getLog(TaskDescriptionRepositoryFactory.class);
        private final static Map<String, TaskDescriptionRepository> repositoryMap
                = new HashMap<String, TaskDescriptionRepository>();

        private TaskDescriptionRepositoryFactory() {
        }

        /**
         * Returns a TaskDescriptionRepository instance
         * There is an only one instance of TaskDescriptionRepository for a given id as
         *  Factory caches TaskDescriptionRepositories
         *
         * @param id Identifier for TaskDescriptionRepository
         * @return TaskDescriptionRepository instance
         */
        public static TaskDescriptionRepository getTaskDescriptionRepository(String id) {

            if (id == null || "".equals(id)) {
                throw new SynapseTaskException("Name cannot be found.", log);
            }

            TaskDescriptionRepository repository = repositoryMap.get(id);
            if (repository == null) {
                if (log.isDebugEnabled()) {
                    log.debug("Creating a TaskDescriptionRepository with id : " + id);
                }
                repository = new TaskDescriptionRepository();
                repositoryMap.put(id, repository);
            }
            return repository;
        }
    }