1 /**
2 *
3 * Copyright 2005 The Apache Software Foundation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.geronimo.activation.handlers;
18
19 import java.awt.Graphics2D;
20 import java.awt.Image;
21 import java.awt.datatransfer.DataFlavor;
22 import java.awt.datatransfer.UnsupportedFlavorException;
23 import java.awt.image.BufferedImage;
24 import java.awt.image.RenderedImage;
25 import java.io.IOException;
26 import java.io.OutputStream;
27 import java.util.Iterator;
28 import javax.activation.DataContentHandler;
29 import javax.activation.DataSource;
30 import javax.activation.UnsupportedDataTypeException;
31 import javax.imageio.IIOImage;
32 import javax.imageio.ImageIO;
33 import javax.imageio.ImageReader;
34 import javax.imageio.ImageWriter;
35
36 /**
37 * @version $Rev: 356022 $ $Date: 2005-12-11 12:58:34 -0800 (Sun, 11 Dec 2005) $
38 */
39 public class AbstractImageHandler implements DataContentHandler {
40 private final DataFlavor flavour;
41
42 public AbstractImageHandler(DataFlavor flavour) {
43 this.flavour = flavour;
44 }
45
46 public DataFlavor[] getTransferDataFlavors() {
47 return new DataFlavor[]{flavour};
48 }
49
50 public Object getTransferData(DataFlavor dataFlavor, DataSource dataSource) throws UnsupportedFlavorException, IOException {
51 return flavour.equals(dataFlavor) ? getContent(dataSource) : null;
52 }
53
54 public Object getContent(DataSource ds) throws IOException {
55 Iterator i = ImageIO.getImageReadersByMIMEType(ds.getContentType());
56 if (!i.hasNext()) {
57 throw new UnsupportedDataTypeException();
58 }
59 ImageReader reader = (ImageReader) i.next();
60 return reader.read(0);
61 }
62
63 public void writeTo(Object obj, String mimeType, OutputStream os) throws IOException {
64 Iterator i = ImageIO.getImageWritersByMIMEType(mimeType);
65 if (!i.hasNext()) {
66 throw new UnsupportedDataTypeException();
67 }
68 ImageWriter writer = (ImageWriter) i.next();
69 writer.setOutput(os);
70
71 if (obj instanceof RenderedImage) {
72 writer.write((RenderedImage) obj);
73 } else if (obj instanceof BufferedImage) {
74 BufferedImage buffered = (BufferedImage) obj;
75 writer.write(new IIOImage(buffered.getRaster(), null, null));
76 } else if (obj instanceof Image) {
77 Image image = (Image) obj;
78 BufferedImage buffered = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB);
79 Graphics2D graphics = buffered.createGraphics();
80 graphics.drawImage(image, 0, 0, null, null);
81 writer.write(new IIOImage(buffered.getRaster(), null, null));
82 } else {
83 throw new UnsupportedDataTypeException();
84 }
85 os.flush();
86 }
87 }