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 26package com.sun.xml.internal.ws.encoding; 27 28import javax.activation.DataContentHandler; 29import javax.activation.ActivationDataFlavor; 30import javax.activation.DataSource; 31import javax.imageio.ImageIO; 32import javax.imageio.ImageWriter; 33import javax.imageio.stream.ImageOutputStream; 34import java.awt.*; 35import java.awt.image.BufferedImage; 36import java.awt.datatransfer.DataFlavor; 37import java.util.logging.Logger; 38import java.util.Iterator; 39import java.io.IOException; 40import java.io.BufferedInputStream; 41import java.io.OutputStream; 42import java.util.Arrays; 43 44/** 45 * @author Jitendra Kotamraju 46 */ 47 48public class ImageDataContentHandler extends Component 49 implements DataContentHandler { 50 51 private static final Logger log = Logger.getLogger(ImageDataContentHandler.class.getName()); 52 private final DataFlavor[] flavor; 53 54 public ImageDataContentHandler() { 55 String[] mimeTypes = ImageIO.getReaderMIMETypes(); 56 flavor = new DataFlavor[mimeTypes.length]; 57 for(int i=0; i < mimeTypes.length; i++) { 58 flavor[i] = new ActivationDataFlavor(Image.class, mimeTypes[i], "Image"); 59 } 60 } 61 62 /** 63 * Returns an array of DataFlavor objects indicating the flavors the 64 * data can be provided in. The array should be ordered according to 65 * preference for providing the data (from most richly descriptive to 66 * least descriptive). 67 * 68 * @return The DataFlavors. 69 */ 70 public DataFlavor[] getTransferDataFlavors() { 71 return Arrays.copyOf(flavor, flavor.length); 72 } 73 74 /** 75 * Returns an object which represents the data to be transferred. 76 * The class of the object returned is defined by the representation class 77 * of the flavor. 78 * 79 * @param df The DataFlavor representing the requested type. 80 * @param ds The DataSource representing the data to be converted. 81 * @return The constructed Object. 82 */ 83 public Object getTransferData(DataFlavor df, DataSource ds) 84 throws IOException { 85 for (DataFlavor aFlavor : flavor) { 86 if (aFlavor.equals(df)) { 87 return getContent(ds); 88 } 89 } 90 return null; 91 } 92 93 /** 94 * Return an object representing the data in its most preferred form. 95 * Generally this will be the form described by the first DataFlavor 96 * returned by the <code>getTransferDataFlavors</code> method. 97 * 98 * @param ds The DataSource representing the data to be converted. 99 * @return The constructed Object. 100 */ 101 public Object getContent(DataSource ds) throws IOException { 102 return ImageIO.read(new BufferedInputStream(ds.getInputStream())); 103 } 104 105 /** 106 * Convert the object to a byte stream of the specified MIME type 107 * and write it to the output stream. 108 * 109 * @param obj The object to be converted. 110 * @param type The requested MIME type of the resulting byte stream. 111 * @param os The output stream into which to write the converted 112 * byte stream. 113 */ 114 115 public void writeTo(Object obj, String type, OutputStream os) 116 throws IOException { 117 118 try { 119 BufferedImage bufImage; 120 if (obj instanceof BufferedImage) { 121 bufImage = (BufferedImage)obj; 122 } else if (obj instanceof Image) { 123 bufImage = render((Image)obj); 124 } else { 125 throw new IOException( 126 "ImageDataContentHandler requires Image object, " 127 + "was given object of type " 128 + obj.getClass().toString()); 129 } 130 ImageWriter writer = null; 131 Iterator<ImageWriter> i = ImageIO.getImageWritersByMIMEType(type); 132 if (i.hasNext()) { 133 writer = i.next(); 134 } 135 if (writer != null) { 136 ImageOutputStream stream = ImageIO.createImageOutputStream(os); 137 writer.setOutput(stream); 138 writer.write(bufImage); 139 writer.dispose(); 140 stream.close(); 141 } else { 142 throw new IOException("Unsupported mime type:"+ type); 143 } 144 } catch (Exception e) { 145 throw new IOException("Unable to encode the image to a stream " 146 + e.getMessage()); 147 } 148 } 149 150 151 private BufferedImage render(Image img) throws InterruptedException { 152 153 MediaTracker tracker = new MediaTracker(this); 154 tracker.addImage(img, 0); 155 tracker.waitForAll(); 156 BufferedImage bufImage = new BufferedImage(img.getWidth(null), 157 img.getHeight(null), BufferedImage.TYPE_INT_RGB); 158 Graphics g = bufImage.createGraphics(); 159 g.drawImage(img, 0, 0, null); 160 g.dispose(); 161 return bufImage; 162 } 163 164} 165