/*
    * Copyright 2012-2017 CodeLibs Project and the Others.
    *
    * Licensed 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.codelibs.fess.ds;
  
  import java.util.ArrayList;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  public class DataStoreFactory {
      protected Map<String, DataStore> dataStoreMap = new LinkedHashMap<>();
  
      public void add(final String name, final DataStore dataStore) {
          if (name == null || dataStore == null) {
              throw new IllegalArgumentException("name or dataStore is null.");
          }
          dataStoreMap.put(name, dataStore);
      }
  
      public DataStore getDataStore(final String name) {
          return dataStoreMap.get(name);
      }
  
      public List<String> getDataStoreNameList() {
          final Set<String> nameSet = dataStoreMap.keySet();
          final List<String> nameList = new ArrayList<>();
          nameList.addAll(nameSet);
          return nameList;
      }
  
  }