001 /* 002 * Copyright (C) 2008-2010 by Holger Arndt 003 * 004 * This file is part of the Universal Java Matrix Package (UJMP). 005 * See the NOTICE file distributed with this work for additional 006 * information regarding copyright ownership and licensing. 007 * 008 * UJMP is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation; either version 2 011 * of the License, or (at your option) any later version. 012 * 013 * UJMP is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public 019 * License along with UJMP; if not, write to the 020 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 021 * Boston, MA 02110-1301 USA 022 */ 023 024 package org.ujmp.core.util.io; 025 026 import java.io.BufferedWriter; 027 import java.io.Closeable; 028 import java.io.File; 029 import java.io.FileOutputStream; 030 import java.io.FileWriter; 031 import java.io.Flushable; 032 import java.io.IOException; 033 import java.io.OutputStream; 034 import java.io.OutputStreamWriter; 035 import java.io.Writer; 036 import java.lang.reflect.Constructor; 037 import java.util.zip.GZIPOutputStream; 038 import java.util.zip.ZipOutputStream; 039 040 public class IntelligentFileWriter extends Writer implements Appendable, Closeable, Flushable { 041 042 private static final String SEVENZIPOUTPUTSTREAM = "org.ujmp.j7zip.SevenZipOutputStream"; 043 044 private FileWriter fw = null; 045 046 private OutputStream zip = null; 047 048 private BufferedWriter bw = null; 049 050 private String encoding = "UTF-8"; 051 052 public IntelligentFileWriter(String filename) throws IOException, ClassNotFoundException { 053 this(filename, false); 054 } 055 056 public IntelligentFileWriter(String filename, boolean append) throws IOException, 057 ClassNotFoundException { 058 this(new File(filename), append); 059 } 060 061 public IntelligentFileWriter(OutputStream outputStream) throws IOException { 062 bw = new BufferedWriter(new OutputStreamWriter(outputStream, encoding)); 063 } 064 065 public IntelligentFileWriter(File file) throws IOException { 066 this(file, false); 067 } 068 069 public IntelligentFileWriter(File file, boolean append) throws IOException { 070 if (file.getAbsolutePath().toLowerCase().endsWith(".gz")) { 071 zip = new GZIPOutputStream(new FileOutputStream(file, append)); 072 bw = new BufferedWriter(new OutputStreamWriter(zip, encoding)); 073 } else if (file.getAbsolutePath().toLowerCase().endsWith(".z")) { 074 zip = new ZipOutputStream(new FileOutputStream(file, append)); 075 bw = new BufferedWriter(new OutputStreamWriter(zip, encoding)); 076 } else if (file.getAbsolutePath().toLowerCase().endsWith(".7z")) { 077 try { 078 Class<?> c = Class.forName(SEVENZIPOUTPUTSTREAM); 079 Constructor<?> con = c.getConstructor(new Class[] { FileOutputStream.class }); 080 zip = (OutputStream) con.newInstance(new Object[] { new FileOutputStream(file, 081 append) }); 082 } catch (ClassNotFoundException e) { 083 throw new IOException("Could not find ujmp-j7zip in classpath"); 084 } catch (Exception e) { 085 throw new IOException("Could not create SevenZipOutputStream"); 086 } 087 bw = new BufferedWriter(new OutputStreamWriter(zip, encoding)); 088 } else { 089 fw = new FileWriter(file, append); 090 bw = new BufferedWriter(fw); 091 } 092 } 093 094 public static final void save(String filename, String text) throws Exception { 095 IntelligentFileWriter fw = new IntelligentFileWriter(filename, false); 096 fw.write(text); 097 fw.close(); 098 } 099 100 public static final void append(String filename, String text) throws Exception { 101 IntelligentFileWriter fw = new IntelligentFileWriter(filename, true); 102 fw.write(text); 103 fw.close(); 104 } 105 106 107 public void close() throws IOException { 108 if (bw != null) 109 bw.close(); 110 if (fw != null) 111 fw.close(); 112 if (zip != null) 113 zip.close(); 114 } 115 116 117 public void flush() throws IOException { 118 if (bw != null) 119 bw.flush(); 120 if (fw != null) 121 fw.flush(); 122 if (zip != null) 123 zip.flush(); 124 } 125 126 127 public void write(char[] cbuf, int off, int len) throws IOException { 128 bw.write(cbuf, off, len); 129 } 130 131 public static void write(OutputStream os, String text) { 132 try { 133 IntelligentFileWriter fw = new IntelligentFileWriter(os); 134 fw.write(text); 135 fw.close(); 136 } catch (Exception e) { 137 e.printStackTrace(); 138 } 139 } 140 141 }