1 /*
   2  * Copyright (c) 2000, 2001, 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 com.sun.imageio.spi;
  27 
  28 import java.io.File;
  29 import java.io.RandomAccessFile;
  30 import java.util.Locale;
  31 import javax.imageio.spi.ImageInputStreamSpi;
  32 import javax.imageio.stream.ImageInputStream;
  33 import javax.imageio.stream.FileImageInputStream;
  34 
  35 public class RAFImageInputStreamSpi extends ImageInputStreamSpi {
  36 
  37     private static final String vendorName = "Oracle Corporation";
  38 
  39     private static final String version = "1.0";
  40 
  41     private static final Class inputClass = RandomAccessFile.class;
  42 
  43     public RAFImageInputStreamSpi() {
  44         super(vendorName, version, inputClass);
  45     }
  46 
  47     public String getDescription(Locale locale) {
  48         return "Service provider that instantiates a FileImageInputStream from a RandomAccessFile";
  49     }
  50 
  51     public ImageInputStream createInputStreamInstance(Object input,
  52                                                       boolean useCache,
  53                                                       File cacheDir) {
  54         if (input instanceof RandomAccessFile) {
  55             try {
  56                 return new FileImageInputStream((RandomAccessFile)input);
  57             } catch (Exception e) {
  58                 return null;
  59             }
  60         } else {
  61             throw new IllegalArgumentException
  62                 ("input not a RandomAccessFile!");
  63         }
  64     }
  65 }