001: /*
002: * $Id: JpegDataContentHandler.java,v 1.2 2007/07/16 16:41:21 ofung Exp $
003: * $Revision: 1.2 $
004: * $Date: 2007/07/16 16:41:21 $
005: */
006:
007: /*
008: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
009: *
010: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
011: *
012: * The contents of this file are subject to the terms of either the GNU
013: * General Public License Version 2 only ("GPL") or the Common Development
014: * and Distribution License("CDDL") (collectively, the "License"). You
015: * may not use this file except in compliance with the License. You can obtain
016: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
017: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
018: * language governing permissions and limitations under the License.
019: *
020: * When distributing the software, include this License Header Notice in each
021: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
022: * Sun designates this particular file as subject to the "Classpath" exception
023: * as provided by Sun in the GPL Version 2 section of the License file that
024: * accompanied this code. If applicable, add the following below the License
025: * Header, with the fields enclosed by brackets [] replaced by your own
026: * identifying information: "Portions Copyrighted [year]
027: * [name of copyright owner]"
028: *
029: * Contributor(s):
030: *
031: * If you wish your version of this file to be governed by only the CDDL or
032: * only the GPL Version 2, indicate your decision by adding "[Contributor]
033: * elects to include this software in this distribution under the [CDDL or GPL
034: * Version 2] license." If you don't indicate a single choice of license, a
035: * recipient has the option to distribute your version of this file under
036: * either the CDDL, the GPL Version 2 or to extend the choice of license to
037: * its licensees as provided above. However, if you add GPL Version 2 code
038: * and therefore, elected the GPL Version 2 license, then the option applies
039: * only if the new code is made subject to such option by the copyright
040: * holder.
041: */
042: package com.sun.xml.messaging.saaj.soap;
043:
044: import java.awt.*;
045: import java.awt.datatransfer.DataFlavor;
046: import java.awt.image.BufferedImage;
047: import java.io.*;
048:
049: import javax.activation.*;
050:
051: import com.sun.image.codec.jpeg.*;
052:
053: /**
054: * JAF data handler for Jpeg content
055: *
056: * @author Ana Lindstrom-Tamer
057: */
058:
059: public class JpegDataContentHandler extends Component implements
060: DataContentHandler {
061: public final String STR_SRC = "java.awt.Image";
062:
063: /**
064: * return the DataFlavors for this <code>DataContentHandler</code>
065: * @return The DataFlavors.
066: */
067: public DataFlavor[] getTransferDataFlavors() { // throws Exception;
068: DataFlavor flavors[] = new DataFlavor[1];
069:
070: try {
071: flavors[0] = new ActivationDataFlavor(Class
072: .forName(STR_SRC), "image/jpeg", "JPEG");
073: } catch (Exception e) {
074: System.out.println(e);
075: }
076:
077: return flavors;
078: }
079:
080: /**
081: * return the Transfer Data of type DataFlavor from InputStream
082: * @param df The DataFlavor.
083: * @param ins The InputStream corresponding to the data.
084: * @return The constructed Object.
085: */
086: public Object getTransferData(DataFlavor df, DataSource ds) {
087:
088: // this is sort of hacky, but will work for the
089: // sake of testing...
090: if (df.getMimeType().startsWith("image/jpeg")) {
091: if (df.getRepresentationClass().getName().equals(STR_SRC)) {
092: InputStream inputStream = null;
093: JPEGImageDecoder decoder = null;
094: BufferedImage jpegLoadImage = null;
095:
096: try {
097: inputStream = ds.getInputStream();
098: decoder = JPEGCodec.createJPEGDecoder(inputStream);
099: jpegLoadImage = decoder.decodeAsBufferedImage();
100:
101: } catch (Exception e) {
102: System.out.println(e);
103: }
104:
105: return jpegLoadImage;
106: }
107: }
108: return null;
109: }
110:
111: /**
112: *
113: */
114: public Object getContent(DataSource ds) { // throws Exception;
115: InputStream inputStream = null;
116: JPEGImageDecoder decoder = null;
117: BufferedImage jpegLoadImage = null;
118:
119: try {
120: inputStream = ds.getInputStream();
121: decoder = JPEGCodec.createJPEGDecoder(inputStream);
122: jpegLoadImage = decoder.decodeAsBufferedImage();
123:
124: } catch (Exception e) {
125: }
126:
127: return (Image) jpegLoadImage;
128: }
129:
130: /**
131: * construct an object from a byte stream
132: * (similar semantically to previous method, we are deciding
133: * which one to support)
134: */
135: public void writeTo(Object obj, String mimeType, OutputStream os)
136: throws IOException {
137: if (!mimeType.equals("image/jpeg"))
138: throw new IOException("Invalid content type \"" + mimeType
139: + "\" for ImageContentHandler");
140:
141: if (obj.equals(null)) {
142: throw new IOException("Null object for ImageContentHandler");
143: }
144:
145: try {
146: BufferedImage bufImage = null;
147: if (obj instanceof BufferedImage) {
148: bufImage = (BufferedImage) obj;
149:
150: } else {
151: Image img = (Image) obj;
152: MediaTracker tracker = new MediaTracker(this );
153: tracker.addImage(img, 0);
154: tracker.waitForAll();
155: if (tracker.isErrorAny()) {
156: throw new IOException("Error while loading image");
157: }
158: bufImage = new BufferedImage(img.getWidth(null), img
159: .getHeight(null), BufferedImage.TYPE_INT_RGB);
160:
161: Graphics g = bufImage.createGraphics();
162: g.drawImage(img, 0, 0, null);
163: }
164:
165: JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(os);
166: JPEGEncodeParam param = encoder
167: .getDefaultJPEGEncodeParam(bufImage);
168: param.setQuality(1, false);
169: encoder.encode(bufImage, param);
170:
171: } catch (Exception ex) {
172: throw new IOException(
173: "Unable to run the JPEG Encoder on a stream "
174: + ex.getMessage());
175: }
176: }
177: }
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