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