| /* |
| * 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.tuscany.sca.domain.search; |
| |
| import java.util.HashMap; |
| |
| import org.apache.tuscany.sca.domain.search.impl.Document; |
| |
| /** |
| * A map that holds a collection of {@link Document}s. Each {@link Document} key |
| * should ideally be something that is unique across the entire contribution |
| * documents. This class overrides {@link HashMap#get(Object)} method, so it |
| * adds an empty {@link Document} object if the specified key is not found in |
| * the map. |
| * |
| * @version $Rev$ $Date$ |
| */ |
| public class DocumentMap extends HashMap<Object, Document> { |
| |
| private static final long serialVersionUID = -2402910290314939928L; |
| |
| /** |
| * Returns a {@link Document} object mapped from the specified key. If no |
| * {@link Document} object is found from the specified key, a empty |
| * {@link Document} object is created and added to the map. |
| * |
| * @param key the {@link Document} key |
| * @return the {@link Document} object mapped from the key |
| */ |
| @Override |
| public Document get(Object key) { |
| Document doc = super.get(key); |
| |
| if (doc == null) { |
| doc = new Document(); |
| put(key, doc); |
| |
| } |
| |
| return doc; |
| |
| } |
| |
| } |