/* * 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; } }