001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.geronimo.activation.handlers; 018 019 import java.awt.Graphics2D; 020 import java.awt.Image; 021 import java.awt.datatransfer.DataFlavor; 022 import java.awt.datatransfer.UnsupportedFlavorException; 023 import java.awt.image.BufferedImage; 024 import java.awt.image.RenderedImage; 025 import java.io.IOException; 026 import java.io.OutputStream; 027 import java.util.Iterator; 028 import javax.activation.DataContentHandler; 029 import javax.activation.DataSource; 030 import javax.activation.UnsupportedDataTypeException; 031 import javax.imageio.IIOImage; 032 import javax.imageio.ImageIO; 033 import javax.imageio.ImageReader; 034 import javax.imageio.ImageWriter; 035 036 /** 037 * @version $Rev: 547376 $ $Date: 2007-06-14 15:38:13 -0400 (Thu, 14 Jun 2007) $ 038 */ 039 public class AbstractImageHandler implements DataContentHandler { 040 private final DataFlavor flavour; 041 042 public AbstractImageHandler(DataFlavor flavour) { 043 this.flavour = flavour; 044 } 045 046 public DataFlavor[] getTransferDataFlavors() { 047 return new DataFlavor[]{flavour}; 048 } 049 050 public Object getTransferData(DataFlavor dataFlavor, DataSource dataSource) throws UnsupportedFlavorException, IOException { 051 return flavour.equals(dataFlavor) ? getContent(dataSource) : null; 052 } 053 054 public Object getContent(DataSource ds) throws IOException { 055 Iterator i = ImageIO.getImageReadersByMIMEType(ds.getContentType()); 056 if (!i.hasNext()) { 057 throw new UnsupportedDataTypeException("Unknown image type " + ds.getContentType()); 058 } 059 ImageReader reader = (ImageReader) i.next(); 060 return reader.read(0); 061 } 062 063 public void writeTo(Object obj, String mimeType, OutputStream os) throws IOException { 064 Iterator i = ImageIO.getImageWritersByMIMEType(mimeType); 065 if (!i.hasNext()) { 066 throw new UnsupportedDataTypeException("Unknown image type " + mimeType); 067 } 068 ImageWriter writer = (ImageWriter) i.next(); 069 writer.setOutput(os); 070 071 if (obj instanceof RenderedImage) { 072 writer.write((RenderedImage) obj); 073 } else if (obj instanceof BufferedImage) { 074 BufferedImage buffered = (BufferedImage) obj; 075 writer.write(new IIOImage(buffered.getRaster(), null, null)); 076 } else if (obj instanceof Image) { 077 Image image = (Image) obj; 078 BufferedImage buffered = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB); 079 Graphics2D graphics = buffered.createGraphics(); 080 graphics.drawImage(image, 0, 0, null, null); 081 writer.write(new IIOImage(buffered.getRaster(), null, null)); 082 } else { 083 throw new UnsupportedDataTypeException("Unknown image type " + obj.getClass().getName()); 084 } 085 os.flush(); 086 } 087 }