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/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * Licensed 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.axis.attachments;

import org.apache.axis.components.logger.LogFactory;
import org.apache.axis.utils.Messages;
import org.apache.commons.logging.Log;

import javax.activation.DataSource;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;

public class ImageDataSource implements DataSource {
    protected static Log log =
        LogFactory.getLog(ImageDataSource.class.getName());
    
    public static final String CONTENT_TYPE = "image/jpeg";

    private final String name;
    private final String contentType;
    private byte[] data;
    private ByteArrayOutputStream os;

    public ImageDataSource(String name, Image data) {
        this(name, CONTENT_TYPE, data);
    } // ctor

    public ImageDataSource(String name, String contentType, Image data) {
        this.name = name;
        this.contentType = contentType == null ? CONTENT_TYPE : contentType;
        os = new ByteArrayOutputStream();
        try {
            if (data != null) {
                ImageWriter writer = null;
                Iterator iter = ImageIO.getImageWritersByMIMEType(contentType);
                if (iter.hasNext()) {
                    writer = (ImageWriter) iter.next();
                }
                writer.setOutput(ImageIO.createImageOutputStream(os));
                BufferedImage rendImage = null;
                if (data instanceof BufferedImage) {
                    rendImage = (BufferedImage) data;
                } else {
                    MediaTracker tracker = new MediaTracker(new Component() {});
                    tracker.addImage(data, 0);
                    tracker.waitForAll();
                    rendImage = new BufferedImage(data.getWidth(null), data.getHeight(null), 1);
                    Graphics g = rendImage.createGraphics();
                    g.drawImage(data, 0, 0, null);
                }
                writer.write(new IIOImage(rendImage, null, null));
                writer.dispose();
            }
        }
        catch (Exception e) {
            log.error(Messages.getMessage("exception00"), e);
        }
    } // ctor

    public String getName() {
        return name;
    } // getName

    public String getContentType() {
        return contentType;
    } // getContentType

    public InputStream getInputStream() throws IOException {
        if (os.size() != 0) {
            data = os.toByteArray();
            os.reset();
        }
        return new ByteArrayInputStream(data == null ? new byte[0] : data);
    } // getInputStream

    public OutputStream getOutputStream() throws IOException {
        if (os.size() != 0) {
            data = os.toByteArray();
            os.reset();
        }
        return os;
    } // getOutputStream
} // class ImageDataSource