com.beetle.framework.web.controller.DrawController.java Source code

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Here is the source code for com.beetle.framework.web.controller.DrawController.java

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/*
 * BJAF - Beetle J2EE Application Framework
 * J2EE
 * 2003-2009  (www.beetlesoft.net)
 * 
 * J2EE
 *
 *   GNU Lesser General Public License v3.0
 *<http://www.gnu.org/licenses/lgpl-3.0.txt/>
 *
 * 
 *  <yuhaodong@gmail.com/>.
 */
package com.beetle.framework.web.controller;

import com.beetle.framework.web.common.CommonUtil;
import com.beetle.framework.web.controller.draw.DrawFactory;
import com.beetle.framework.web.controller.draw.DrawInfo;
import com.beetle.framework.web.controller.draw.IDraw;
import org.jfree.chart.ChartUtilities;

import javax.servlet.ServletException;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;

/**
 * <p>
 * Title: BeetleWeb
 * </p>
 * 
 * <p>
 * Description: MVC Web Framework
 * </p>
 * 
 * <p>
 * Copyright: Copyright (c) 2005
 * </p>
 * 
 * <p>
 * Company: 
 * </p>
 * 
 * @author not attributable
 * @version 1.0
 */
final public class DrawController extends AbnormalViewControlerImp {
    public DrawController() {
        this.setCacheSeconds(-1);
    }

    private void drawing(OutputStream out, DrawInfo drawInfo) throws IOException {
        if (drawInfo.getPlusObj() != null && drawInfo.getQuality() == -1) {
            BufferedImage image = (BufferedImage) drawInfo.getPlusObj();
            ChartUtilities.writeBufferedImageAsJPEG(out, image);
        } else {
            ChartUtilities.writeChartAsJPEG(out, drawInfo.getQuality(), drawInfo.getChart(), drawInfo.getWidth(),
                    drawInfo.getHeight(), drawInfo.getInfo());
        }
        drawInfo = null;
    }

    /**
     * performX
     * 
     * @param webInput
     *            WebInput
     * @param outputStream
     *            OutputStream
     * @throws ServletException
     * @todo Implement this
     *       com.beetle.framework.web.controller.AbnormalViewControlerImp method
     */
    public void performX(WebInput webInput, OutputStream outputStream) throws ControllerException {
        this.setContentType("image/jpeg");
        // response.setHeader("Pragma", "No-cache");
        // response.setHeader("Cache-Control", "no-cache");
        // response.setDateHeader("Expires", 0);
        try {
            IDraw draw = (IDraw) webInput.getRequest().getAttribute("DRAW_CTRL_IOBJ");
            if (draw == null) {
                draw = DrawFactory.getDrawInstance(webInput.getControllerName(), this.getServletContext(),
                        (String) webInput.getRequest().getAttribute(CommonUtil.controllerimpclassname));
            }
            drawing(outputStream, draw.draw(webInput));
        } catch (Exception ex) {
            throw new ControllerException("errCode[-1007]:" + ex.getMessage(), ex);
        }
    }
}