/*
 * Copyright 2009-2013 the Fess 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 jp.sf.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<String, DataStore>();

    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<String>();
        nameList.addAll(nameSet);
        return nameList;
    }

}
