001 /*--------------------------------------------------------------------------+ 002 $Id: CanonicalFilePool.java 26268 2010-02-18 10:44:30Z juergens $ 003 | | 004 | Copyright 2005-2010 Technische Universitaet Muenchen | 005 | | 006 | Licensed under the Apache License, Version 2.0 (the "License"); | 007 | you may not use this file except in compliance with the License. | 008 | You may obtain a copy of the License at | 009 | | 010 | http://www.apache.org/licenses/LICENSE-2.0 | 011 | | 012 | Unless required by applicable law or agreed to in writing, software | 013 | distributed under the License is distributed on an "AS IS" BASIS, | 014 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 015 | See the License for the specific language governing permissions and | 016 | limitations under the License. | 017 +--------------------------------------------------------------------------*/ 018 package edu.tum.cs.commons.filesystem; 019 020 import java.util.HashMap; 021 import java.util.Map; 022 023 /** 024 * Pool for {@link CanonicalFile}s. 025 * 026 * @author juergens 027 * @author $Author: juergens $ 028 * @version $Rev: 26268 $ 029 * @levd.rating GREEN Hash: 3FEBAFF4FADD8361BE4760B539F64236 030 */ 031 public class CanonicalFilePool { 032 033 /** Set that manages pooled files */ 034 private final Map<CanonicalFile, CanonicalFile> internedFiles = new HashMap<CanonicalFile, CanonicalFile>(); 035 036 /** Get file from pool */ 037 public CanonicalFile intern(CanonicalFile file) { 038 if (!internedFiles.containsKey(file)) { 039 internedFiles.put(file, file); 040 } 041 042 return internedFiles.get(file); 043 } 044 }