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1
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
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 }
88 |
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