1 /*
   2  * Copyright (c) 2000, 2010, 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.IOException;
  30 import java.io.OutputStream;
  31 import java.util.Locale;
  32 import javax.imageio.spi.ImageOutputStreamSpi;
  33 import javax.imageio.stream.ImageOutputStream;
  34 import javax.imageio.stream.FileCacheImageOutputStream;
  35 import javax.imageio.stream.MemoryCacheImageOutputStream;
  36 
  37 public class OutputStreamImageOutputStreamSpi extends ImageOutputStreamSpi {
  38 
  39     private static final String vendorName = "Oracle Corporation";
  40 
  41     private static final String version = "1.0";
  42 
  43     private static final Class<?> outputClass = OutputStream.class;
  44 
  45     public OutputStreamImageOutputStreamSpi() {
  46         super(vendorName, version, outputClass);
  47     }
  48 
  49     public String getDescription(Locale locale) {
  50         return "Service provider that instantiates an OutputStreamImageOutputStream from an OutputStream";
  51     }
  52 
  53     public boolean canUseCacheFile() {
  54         return true;
  55     }
  56 
  57     public boolean needsCacheFile() {
  58         return false;
  59     }
  60 
  61     public ImageOutputStream createOutputStreamInstance(Object output,
  62                                                         boolean useCache,
  63                                                         File cacheDir)
  64         throws IOException {
  65         if (output instanceof OutputStream) {
  66             OutputStream os = (OutputStream)output;
  67             if (useCache) {
  68                 return new FileCacheImageOutputStream(os, cacheDir);
  69             } else {
  70                 return new MemoryCacheImageOutputStream(os);
  71             }
  72         } else {
  73             throw new IllegalArgumentException();
  74         }
  75     }
  76 }