org.sakaiproject.sitestats.tool.wicket.components.ChartImage.java Source code

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Here is the source code for org.sakaiproject.sitestats.tool.wicket.components.ChartImage.java

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/**
 * $URL$
 * $Id$
 *
 * Copyright (c) 2006-2009 The Sakai Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ECL-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.sakaiproject.sitestats.tool.wicket.components;

import java.awt.image.BufferedImage;

import org.apache.wicket.request.resource.IResource;
import org.apache.wicket.markup.html.image.Image;
import org.apache.wicket.request.resource.DynamicImageResource;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.request.http.WebResponse;
import org.apache.wicket.request.resource.AbstractResource;
import org.apache.wicket.util.time.Duration;

/**
 * @author Nuno Fernandes
 */
@SuppressWarnings("serial")
public class ChartImage extends Panel {
    private static final long serialVersionUID = 1L;
    private transient BufferedImage bufferedImage = null;
    private Image chartImage = null;

    public ChartImage(String id, final BufferedImage image) {
        super(id);
        this.bufferedImage = image;

        createImage();
        add(chartImage);
    }

    public void setBufferedImage(BufferedImage bufferedImage) {
        this.bufferedImage = bufferedImage;
        createImage();
    }

    public BufferedImage getBufferedImage() {
        System.out.println("getBufferedImage()");
        return bufferedImage;
    }

    private void createImage() {
        chartImage = new Image("chartImage") {
            @Override
            protected IResource getImageResource() {
                return new DynamicImageResource() {

                    @Override
                    protected byte[] getImageData(IResource.Attributes attributes) {
                        return toImageData(getBufferedImage());
                    }

                    // adapted from https://cwiki.apache.org/confluence/display/WICKET/JFreeChart+and+wicket+example
                    @Override
                    protected void configureResponse(AbstractResource.ResourceResponse response,
                            IResource.Attributes attributes) {
                        super.configureResponse(response, attributes);

                        response.setCacheDuration(Duration.NONE);
                        response.setCacheScope(WebResponse.CacheScope.PRIVATE);
                    }
                };
            }
        };
        chartImage.setOutputMarkupId(true);
    }

}