com.sun.xml.ws.encoding.ImageDataContentHandler Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2019 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package com.sun.xml.ws.encoding;
import javax.activation.DataContentHandler;
import javax.activation.ActivationDataFlavor;
import javax.activation.DataSource;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.datatransfer.DataFlavor;
import java.util.logging.Logger;
import java.util.Iterator;
import java.io.IOException;
import java.io.BufferedInputStream;
import java.io.OutputStream;
import java.util.Arrays;
/**
* @author Jitendra Kotamraju
*/
public class ImageDataContentHandler extends Component
implements DataContentHandler {
private static final Logger log = Logger.getLogger(ImageDataContentHandler.class.getName());
private final 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(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 Arrays.copyOf(flavor, flavor.length);
}
/**
* 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 (DataFlavor aFlavor : flavor) {
if (aFlavor.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 getTransferDataFlavors 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 type 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;
if (obj instanceof BufferedImage) {
bufImage = (BufferedImage)obj;
} else if (obj instanceof Image) {
bufImage = render((Image)obj);
} else {
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 = i.next();
}
if (writer != null) {
ImageOutputStream stream = ImageIO.createImageOutputStream(os);
writer.setOutput(stream);
writer.write(bufImage);
writer.dispose();
stream.close();
} else {
throw new IOException("Unsupported mime type:"+ type);
}
} catch (Exception e) {
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;
}
}