1 /*
   2  * Copyright (c) 1997, 2013, 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.xml.internal.messaging.saaj.soap;
  27 
  28 import java.awt.datatransfer.DataFlavor;
  29 import java.io.*;
  30 import java.awt.*;
  31 
  32 import javax.activation.*;
  33 
  34 /**
  35  * DataContentHandler for image/gif.
  36  *
  37  * @author Ana Lindstrom-Tamer
  38  */
  39 public class GifDataContentHandler extends Component implements DataContentHandler {
  40     private static ActivationDataFlavor myDF =
  41         new ActivationDataFlavor(
  42             java.awt.Image.class,
  43             "image/gif",
  44             "GIF Image");
  45 
  46     protected ActivationDataFlavor getDF() {
  47         return myDF;
  48     }
  49 
  50     /**
  51      * Return the DataFlavors for this <code>DataContentHandler</code>.
  52      *
  53      * @return The DataFlavors
  54      */
  55     public DataFlavor[] getTransferDataFlavors() { // throws Exception;
  56         return new DataFlavor[] { getDF()};
  57     }
  58 
  59     /**
  60      * Return the Transfer Data of type DataFlavor from InputStream.
  61      *
  62      * @param df The DataFlavor
  63      * @param ins The InputStream corresponding to the data
  64      * @return String object
  65      */
  66     public Object getTransferData(DataFlavor df, DataSource ds)
  67         throws IOException {
  68         // use myDF.equals to be sure to get ActivationDataFlavor.equals,
  69         // which properly ignores Content-Type parameters in comparison
  70         if (getDF().equals(df))
  71             return getContent(ds);
  72         else
  73             return null;
  74     }
  75 
  76     public Object getContent(DataSource ds) throws IOException {
  77         InputStream is = ds.getInputStream();
  78         int pos = 0;
  79         int count;
  80         byte buf[] = new byte[1024];
  81 
  82         while ((count = is.read(buf, pos, buf.length - pos)) != -1) {
  83             pos += count;
  84             if (pos >= buf.length) {
  85                 int size = buf.length;
  86                 if (size < 256*1024)
  87                     size += size;
  88                 else
  89                     size += 256*1024;
  90                 byte tbuf[] = new byte[size];
  91                 System.arraycopy(buf, 0, tbuf, 0, pos);
  92                 buf = tbuf;
  93             }
  94         }
  95         Toolkit tk = Toolkit.getDefaultToolkit();
  96         return tk.createImage(buf, 0, pos);
  97     }
  98 
  99     /**
 100      * Write the object to the output stream, using the specified MIME type.
 101      */
 102     public void writeTo(Object obj, String type, OutputStream os)
 103                         throws IOException {
 104         if (obj != null && !(obj instanceof Image))
 105             throw new IOException("\"" + getDF().getMimeType() +
 106                 "\" DataContentHandler requires Image object, " +
 107                 "was given object of type " + obj.getClass().toString());
 108 
 109         throw new IOException(getDF().getMimeType() + " encoding not supported");
 110     }
 111 
 112 
 113 }