001/* 002 * Copyright 2006 - 2013 003 * Stefan Balev <stefan.balev@graphstream-project.org> 004 * Julien Baudry <julien.baudry@graphstream-project.org> 005 * Antoine Dutot <antoine.dutot@graphstream-project.org> 006 * Yoann Pigné <yoann.pigne@graphstream-project.org> 007 * Guilhelm Savin <guilhelm.savin@graphstream-project.org> 008 * 009 * This file is part of GraphStream <http://graphstream-project.org>. 010 * 011 * GraphStream is a library whose purpose is to handle static or dynamic 012 * graph, create them from scratch, file or any source and display them. 013 * 014 * This program is free software distributed under the terms of two licenses, the 015 * CeCILL-C license that fits European law, and the GNU Lesser General Public 016 * License. You can use, modify and/ or redistribute the software under the terms 017 * of the CeCILL-C license as circulated by CEA, CNRS and INRIA at the following 018 * URL <http://www.cecill.info> or under the terms of the GNU LGPL as published by 019 * the Free Software Foundation, either version 3 of the License, or (at your 020 * option) any later version. 021 * 022 * This program is distributed in the hope that it will be useful, but WITHOUT ANY 023 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 024 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. 025 * 026 * You should have received a copy of the GNU Lesser General Public License 027 * along with this program. If not, see <http://www.gnu.org/licenses/>. 028 * 029 * The fact that you are presently reading this means that you have had 030 * knowledge of the CeCILL-C and LGPL licenses and that you accept their terms. 031 */ 032package org.graphstream.stream.file; 033 034import java.util.concurrent.ConcurrentHashMap; 035 036/** 037 * Try to instantiate the correct writer given a graph filename. 038 * 039 * <p> 040 * This class tries to instantiate a writer given a filename. Actually it purely 041 * tries to analyze the extension and propose the writer according to this 042 * extension. 043 * </p> 044 */ 045public class FileSinkFactory { 046 private static final ConcurrentHashMap<String, Class<? extends FileSink>> ext2sink; 047 048 static { 049 ext2sink = new ConcurrentHashMap<String, Class<? extends FileSink>>(); 050 051 ext2sink.put("dgs", FileSinkDGS.class); 052 ext2sink.put("dgsz", FileSinkDGS.class); 053 ext2sink.put("dgml", FileSinkDynamicGML.class); 054 ext2sink.put("gml", FileSinkGML.class); 055 ext2sink.put("dot", FileSinkDOT.class); 056 ext2sink.put("svg", FileSinkSVG2.class); 057 ext2sink.put("pgf", FileSinkTikZ.class); 058 ext2sink.put("tikz", FileSinkTikZ.class); 059 ext2sink.put("tex", FileSinkTikZ.class); 060 ext2sink.put("gexf", FileSinkGEXF.class); 061 ext2sink.put("xml", FileSinkGEXF.class); 062 ext2sink.put("png", FileSinkImages.class); 063 ext2sink.put("jpg", FileSinkImages.class); 064 } 065 066 /** 067 * Looks at the file name given and its extension and propose a file output 068 * for the format that match this extension. 069 * 070 * @param filename 071 * The file name where the graph will be written. 072 * @return A file sink or null. 073 */ 074 public static FileSink sinkFor(String filename) { 075 if (filename.indexOf('.') > 0) { 076 String ext = filename.substring(filename.lastIndexOf('.') + 1); 077 ext = ext.toLowerCase(); 078 079 if (ext2sink.containsKey(ext)) { 080 Class<? extends FileSink> fsink = ext2sink.get(ext); 081 082 try { 083 return fsink.newInstance(); 084 } catch (InstantiationException e) { 085 e.printStackTrace(); 086 } catch (IllegalAccessException e) { 087 e.printStackTrace(); 088 } 089 } 090 } 091 092 return null; 093 } 094}