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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 javax.activation.*;
//import com.sun.image.codec.jpeg.*;
import javax.imageio.ImageIO;
/**
* JAF data handler for Jpeg content
*
* @author Ana Lindstrom-Tamer
*/
public class JpegDataContentHandler
extends Component
implements DataContentHandler {
public final String STR_SRC = "java.awt.Image";
/**
* return the DataFlavors for this <code>DataContentHandler</code>
* @return The DataFlavors.
*/
public DataFlavor[] getTransferDataFlavors() { // throws Exception;
DataFlavor flavors[] = new DataFlavor[1];
try {
flavors[0] =
new ActivationDataFlavor(
Class.forName(STR_SRC),
"image/jpeg",
"JPEG");
} catch (Exception e) {
System.out.println(e);
}
return flavors;
}
/**
* return the Transfer Data of type DataFlavor from InputStream
* @param df The DataFlavor.
* @param ins The InputStream corresponding to the data.
* @return The constructed Object.
*/
public Object getTransferData(DataFlavor df, DataSource ds) {
// this is sort of hacky, but will work for the
// sake of testing...
if (df.getMimeType().startsWith("image/jpeg")) {
if (df.getRepresentationClass().getName().equals(STR_SRC)) {
InputStream inputStream = null;
BufferedImage jpegLoadImage = null;
try {
inputStream = ds.getInputStream();
jpegLoadImage = ImageIO.read(inputStream);
} catch (Exception e) {
System.out.println(e);
}
return jpegLoadImage;
}
}
return null;
}
/**
*
*/
public Object getContent(DataSource ds) { // throws Exception;
InputStream inputStream = null;
BufferedImage jpegLoadImage = null;
try {
inputStream = ds.getInputStream();
jpegLoadImage = ImageIO.read(inputStream);
} catch (Exception e) {
}
return (Image) jpegLoadImage;
}
/**
* construct an object from a byte stream
* (similar semantically to previous method, we are deciding
* which one to support)
*/
public void writeTo(Object obj, String mimeType, OutputStream os)
throws IOException {
if (!mimeType.equals("image/jpeg"))
throw new IOException(
"Invalid content type \""
+ mimeType
+ "\" for ImageContentHandler");
if (obj.equals(null)) {
throw new IOException("Null object for ImageContentHandler");
}
try {
BufferedImage bufImage = null;
if (obj instanceof BufferedImage) {
bufImage = (BufferedImage) obj;
} else {
Image img = (Image) obj;
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(img, 0);
tracker.waitForAll();
if (tracker.isErrorAny()) {
throw new IOException("Error while loading image");
}
bufImage =
new BufferedImage(
img.getWidth(null),
img.getHeight(null),
BufferedImage.TYPE_INT_RGB);
Graphics g = bufImage.createGraphics();
g.drawImage(img, 0, 0, null);
}
ImageIO.write(bufImage, "jpeg", os);
} catch (Exception ex) {
throw new IOException(
"Unable to run the JPEG Encoder on a stream "
+ ex.getMessage());
}
}
}