/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.geronimo.activation.handlers;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Iterator;
import javax.activation.DataContentHandler;
import javax.activation.DataSource;
import javax.activation.UnsupportedDataTypeException;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageWriter;
/**
* @version $Rev: 547376 $ $Date: 2007-06-14 15:38:13 -0400 (Thu, 14 Jun 2007) $
*/
public class AbstractImageHandler implements DataContentHandler {
private final DataFlavor flavour;
public AbstractImageHandler(DataFlavor flavour) {
this.flavour = flavour;
}
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[]{flavour};
}
public Object getTransferData(DataFlavor dataFlavor, DataSource dataSource) throws UnsupportedFlavorException, IOException {
return flavour.equals(dataFlavor) ? getContent(dataSource) : null;
}
public Object getContent(DataSource ds) throws IOException {
Iterator i = ImageIO.getImageReadersByMIMEType(ds.getContentType());
if (!i.hasNext()) {
throw new UnsupportedDataTypeException("Unknown image type " + ds.getContentType());
}
ImageReader reader = (ImageReader) i.next();
return reader.read(0);
}
public void writeTo(Object obj, String mimeType, OutputStream os) throws IOException {
Iterator i = ImageIO.getImageWritersByMIMEType(mimeType);
if (!i.hasNext()) {
throw new UnsupportedDataTypeException("Unknown image type " + mimeType);
}
ImageWriter writer = (ImageWriter) i.next();
writer.setOutput(os);
if (obj instanceof RenderedImage) {
writer.write((RenderedImage) obj);
} else if (obj instanceof BufferedImage) {
BufferedImage buffered = (BufferedImage) obj;
writer.write(new IIOImage(buffered.getRaster(), null, null));
} else if (obj instanceof Image) {
Image image = (Image) obj;
BufferedImage buffered = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB);
Graphics2D graphics = buffered.createGraphics();
graphics.drawImage(image, 0, 0, null, null);
writer.write(new IIOImage(buffered.getRaster(), null, null));
} else {
throw new UnsupportedDataTypeException("Unknown image type " + obj.getClass().getName());
}
os.flush();
}
}