001/*-------------------------------------------------------------------------+
002|                                                                          |
003| Copyright 2005-2011 The ConQAT Project                                   |
004|                                                                          |
005| Licensed under the Apache License, Version 2.0 (the "License");          |
006| you may not use this file except in compliance with the License.         |
007| You may obtain a copy of the License at                                  |
008|                                                                          |
009|    http://www.apache.org/licenses/LICENSE-2.0                            |
010|                                                                          |
011| Unless required by applicable law or agreed to in writing, software      |
012| distributed under the License is distributed on an "AS IS" BASIS,        |
013| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
014| See the License for the specific language governing permissions and      |
015| limitations under the License.                                           |
016+-------------------------------------------------------------------------*/
017package org.conqat.lib.commons.filesystem;
018
019import java.util.HashMap;
020import java.util.Map;
021
022/**
023 * Pool for {@link CanonicalFile}s.
024 * 
025 * @author juergens
026 */
027public class CanonicalFilePool {
028
029        /** Set that manages pooled files */
030        private final Map<CanonicalFile, CanonicalFile> internedFiles = new HashMap<CanonicalFile, CanonicalFile>();
031
032        /** Get file from pool */
033        public CanonicalFile intern(CanonicalFile file) {
034                if (!internedFiles.containsKey(file)) {
035                        internedFiles.put(file, file);
036                }
037
038                return internedFiles.get(file);
039        }
040}