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 }