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package com.sun.xml.messaging.saaj.soap;
import java.awt.*;
import java.awt.datatransfer.DataFlavor;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Iterator;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.activation.*;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
import com.sun.xml.messaging.saaj.util.LogDomainConstants;
public class ImageDataContentHandler extends Component
implements DataContentHandler {
protected static final Logger log =
Logger.getLogger(LogDomainConstants.SOAP_DOMAIN,
"com.sun.xml.messaging.saaj.soap.LocalStrings");
private DataFlavor[] flavor;
public ImageDataContentHandler() {
String[] mimeTypes = ImageIO.getReaderMIMETypes();
flavor = new DataFlavor[mimeTypes.length];
for(int i=0; i < mimeTypes.length; i++) {
flavor[i] = new ActivationDataFlavor(
java.awt.Image.class, mimeTypes[i], "Image");
}
}
/**
* Returns an array of DataFlavor objects indicating the flavors the
* data can be provided in. The array should be ordered according to
* preference for providing the data (from most richly descriptive to
* least descriptive).
*
* @return The DataFlavors.
*/
public DataFlavor[] getTransferDataFlavors() {
return flavor;
}
/**
* Returns an object which represents the data to be transferred.
* The class of the object returned is defined by the representation class
* of the flavor.
*
* @param df The DataFlavor representing the requested type.
* @param ds The DataSource representing the data to be converted.
* @return The constructed Object.
*/
public Object getTransferData(DataFlavor df, DataSource ds)
throws IOException {
for (int i=0; i < flavor.length; i++) {
if (flavor[i].equals(df)) {
return getContent(ds);
}
}
return null;
}
/**
* Return an object representing the data in its most preferred form.
* Generally this will be the form described by the first DataFlavor
* returned by the <code>getTransferDataFlavors</code> method.
*
* @param ds The DataSource representing the data to be converted.
* @return The constructed Object.
*/
public Object getContent(DataSource ds) throws IOException {
return ImageIO.read(new BufferedInputStream(ds.getInputStream()));
}
/**
* Convert the object to a byte stream of the specified MIME type
* and write it to the output stream.
*
* @param obj The object to be converted.
* @param mimeType The requested MIME type of the resulting byte stream.
* @param os The output stream into which to write the converted
* byte stream.
*/
public void writeTo(Object obj, String type, OutputStream os)
throws IOException {
try {
BufferedImage bufImage = null;
if (obj instanceof BufferedImage) {
bufImage = (BufferedImage)obj;
} else if (obj instanceof Image) {
bufImage = render((Image)obj);
} else {
log.log(Level.SEVERE,
"SAAJ0520.soap.invalid.obj.type",
new String[] { obj.getClass().toString() });
throw new IOException(
"ImageDataContentHandler requires Image object, "
+ "was given object of type "
+ obj.getClass().toString());
}
ImageWriter writer = null;
Iterator i = ImageIO.getImageWritersByMIMEType(type);
if (i.hasNext()) {
writer = (ImageWriter)i.next();
}
if (writer != null) {
ImageOutputStream stream = null;
stream = ImageIO.createImageOutputStream(os);
writer.setOutput(stream);
writer.write(bufImage);
writer.dispose();
stream.close();
} else {
log.log(Level.SEVERE, "SAAJ0526.soap.unsupported.mime.type",
new String[] { type });
throw new IOException("Unsupported mime type:"+ type);
}
} catch (Exception e) {
log.severe("SAAJ0525.soap.cannot.encode.img");
throw new IOException("Unable to encode the image to a stream "
+ e.getMessage());
}
}
private BufferedImage render(Image img) throws InterruptedException {
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(img, 0);
tracker.waitForAll();
BufferedImage bufImage = new BufferedImage(img.getWidth(null),
img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics g = bufImage.createGraphics();
g.drawImage(img, 0, 0, null);
g.dispose();
return bufImage;
}
}