1 /*
   2  * Copyright (c) 1995, 1996, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.awt.image;
  27 
  28 import java.io.InputStream;
  29 import java.io.FileInputStream;
  30 import java.io.BufferedInputStream;
  31 import java.io.FileNotFoundException;
  32 
  33 public class FileImageSource extends InputStreamImageSource {
  34     String imagefile;
  35 
  36     public FileImageSource(String filename) {
  37         SecurityManager security = System.getSecurityManager();
  38         if (security != null) {
  39             security.checkRead(filename);
  40         }
  41         imagefile = filename;
  42     }
  43 
  44     final boolean checkSecurity(Object context, boolean quiet) {
  45         // File based images only ever need to be checked statically
  46         // when the image is retrieved from the cache.
  47         return true;
  48     }
  49 
  50     protected ImageDecoder getDecoder() {
  51         if (imagefile == null) {
  52             return null;
  53         }
  54 
  55         InputStream is;
  56         try {
  57             is = new BufferedInputStream(new FileInputStream(imagefile));
  58         } catch (FileNotFoundException e) {
  59             return null;
  60         }
  61         // Don't believe the file suffix - many users don't know what
  62         // kind of image they have and guess wrong...
  63         /*
  64         int suffixpos = imagefile.lastIndexOf('.');
  65         if (suffixpos >= 0) {
  66             String suffix = imagefile.substring(suffixpos+1).toLowerCase();
  67             if (suffix.equals("gif")) {
  68                 return new GifImageDecoder(this, is);
  69             } else if (suffix.equals("jpeg") || suffix.equals("jpg") ||
  70                        suffix.equals("jpe") || suffix.equals("jfif")) {
  71                 return new JPEGImageDecoder(this, is);
  72             } else if (suffix.equals("xbm")) {
  73                 return new XbmImageDecoder(this, is);
  74             }
  75         }
  76         */
  77         return getDecoder(is);
  78     }
  79 }