1 /*
   2  * Copyright (c) 1997, 2017, 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     @Override
  56     public DataFlavor[] getTransferDataFlavors() { // throws Exception;
  57         return new DataFlavor[] { getDF()};
  58     }
  59 
  60     /**
  61      * Return the Transfer Data of type DataFlavor from InputStream.
  62      *
  63      * @param df The DataFlavor
  64      * @param ds The DataSource
  65      * @return String object
  66      * @exception IOException in case of an I/O error
  67      */
  68     @Override
  69     public Object getTransferData(DataFlavor df, DataSource ds)
  70         throws IOException {
  71         // use myDF.equals to be sure to get ActivationDataFlavor.equals,
  72         // which properly ignores Content-Type parameters in comparison
  73         if (getDF().equals(df))
  74             return getContent(ds);
  75         else
  76             return null;
  77     }
  78 
  79     @Override
  80     public Object getContent(DataSource ds) throws IOException {
  81         InputStream is = ds.getInputStream();
  82         int pos = 0;
  83         int count;
  84         byte buf[] = new byte[1024];
  85 
  86         while ((count = is.read(buf, pos, buf.length - pos)) != -1) {
  87             pos += count;
  88             if (pos >= buf.length) {
  89                 int size = buf.length;
  90                 if (size < 256*1024)
  91                     size += size;
  92                 else
  93                     size += 256*1024;
  94                 byte tbuf[] = new byte[size];
  95                 System.arraycopy(buf, 0, tbuf, 0, pos);
  96                 buf = tbuf;
  97             }
  98         }
  99         Toolkit tk = Toolkit.getDefaultToolkit();
 100         return tk.createImage(buf, 0, pos);
 101     }
 102 
 103     /**
 104      * Write the object to the output stream, using the specified MIME type.
 105      * @param obj object to write
 106      * @param type requested MIME type of the resulting byte stream
 107      * @param os OutputStream
 108      */
 109     @Override
 110     public void writeTo(Object obj, String type, OutputStream os)
 111                         throws IOException {
 112         if (obj != null && !(obj instanceof Image))
 113             throw new IOException("\"" + getDF().getMimeType() +
 114                 "\" DataContentHandler requires Image object, " +
 115                 "was given object of type " + obj.getClass().toString());
 116 
 117         throw new IOException(getDF().getMimeType() + " encoding not supported");
 118     }
 119 
 120 
 121 }