001 /* FileImageOutputStream.java -- 002 Copyright (C) 2004 Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 039 package javax.imageio.stream; 040 041 import java.io.File; 042 import java.io.FileNotFoundException; 043 import java.io.IOException; 044 import java.io.RandomAccessFile; 045 046 /** 047 * @author Michael Koch (konqueror@gmx.de) 048 */ 049 public class FileImageOutputStream extends ImageOutputStreamImpl 050 { 051 private RandomAccessFile file; 052 053 public FileImageOutputStream(File file) 054 throws FileNotFoundException, IOException 055 { 056 if (file == null) 057 throw new IllegalArgumentException("file may not be null"); 058 059 // Do security check. 060 file.canRead(); 061 062 this.file = new RandomAccessFile(file, "r"); 063 } 064 065 public FileImageOutputStream(RandomAccessFile file) 066 { 067 if (file == null) 068 throw new IllegalArgumentException("file may not be null"); 069 070 this.file = file; 071 } 072 073 public void close() 074 throws IOException 075 { 076 file.close(); 077 } 078 079 public long length() 080 { 081 try 082 { 083 return file.length(); 084 } 085 catch (IOException e) 086 { 087 return -1L; 088 } 089 } 090 091 public int read() 092 throws IOException 093 { 094 checkClosed(); 095 096 setBitOffset(0); 097 return file.read(); 098 } 099 100 public int read(byte[] data, int offset, int len) 101 throws IOException 102 { 103 checkClosed(); 104 105 setBitOffset(0); 106 return file.read(data, offset, len); 107 } 108 109 public void seek(long position) 110 throws IOException 111 { 112 super.seek(position); 113 file.seek(position); 114 } 115 116 public void write(byte[] data, int offset, int len) 117 throws IOException 118 { 119 checkClosed(); 120 121 flushBits(); 122 file.write(data, offset, len); 123 } 124 125 public void write(int value) 126 throws IOException 127 { 128 checkClosed(); 129 130 // FIXME: Flush pending bits. 131 file.write(value); 132 } 133 }