/*
* Copyright 2013, 2014 Deutsche Nationalbibliothek
*
* 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.culturegraph.mf.metamorph;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Implements {@link Registry} with a {@link HashMap}.
*
* @author Markus Michael Geipel
*
* @param <T>
*/
final class SimpleDataRegistry<T> implements Registry<T> {
private final Map<String, List<T>> map = new HashMap<String, List<T>>();
@Override
public void register(final String path, final T value) {
List<T> matchingData = map.get(path);
if (matchingData == null) {
matchingData = new ArrayList<T>();
map.put(path, matchingData);
}
matchingData.add(value);
}
@Override
public List<T> get(final String path) {
final List<T> matchingData = map.get(path);
if (matchingData == null) {
return Collections.emptyList();
}
return matchingData;
}
}