franta-hg@1: /* ================================================================
franta-hg@1:  * Cewolf : Chart enabling Web Objects Framework
franta-hg@1:  * ================================================================
franta-hg@1:  *
franta-hg@1:  * Project Info:  http://cewolf.sourceforge.net
franta-hg@1:  * Project Lead:  Guido Laures (guido@laures.de);
franta-hg@1:  *
franta-hg@1:  * (C) Copyright 2002, by Guido Laures
franta-hg@1:  *
franta-hg@1:  * This library is free software; you can redistribute it and/or modify it under the terms
franta-hg@1:  * of the GNU Lesser General Public License as published by the Free Software Foundation;
franta-hg@1:  * either version 2.1 of the License, or (at your option) any later version.
franta-hg@1:  *
franta-hg@1:  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
franta-hg@1:  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
franta-hg@1:  * See the GNU Lesser General Public License for more details.
franta-hg@1:  *
franta-hg@1:  * You should have received a copy of the GNU Lesser General Public License along with this
franta-hg@1:  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
franta-hg@1:  * Boston, MA 02111-1307, USA.
franta-hg@1:  */
franta-hg@1: 
franta-hg@1: package de.laures.cewolf.taglib;
franta-hg@1: 
franta-hg@1: import java.io.Serializable;
franta-hg@1: import java.util.Calendar;
franta-hg@1: import java.util.Date;
franta-hg@1: import java.util.GregorianCalendar;
franta-hg@1: 
franta-hg@1: import org.apache.commons.logging.Log;
franta-hg@1: import org.apache.commons.logging.LogFactory;
franta-hg@1: 
franta-hg@1: import de.laures.cewolf.CewolfException;
franta-hg@1: import de.laures.cewolf.ChartHolder;
franta-hg@1: import de.laures.cewolf.ChartImage;
franta-hg@1: import de.laures.cewolf.ChartValidationException;
franta-hg@1: import de.laures.cewolf.DatasetProduceException;
franta-hg@1: import de.laures.cewolf.PostProcessingException;
franta-hg@1: import de.laures.cewolf.event.ChartImageRenderListener;
franta-hg@1: import de.laures.cewolf.util.RenderedImage;
franta-hg@1: import de.laures.cewolf.util.Renderer;
franta-hg@1: 
franta-hg@1: /**
franta-hg@1:  * Serializable implementaton of a ChartImage.
franta-hg@1:  * @author glaures
franta-hg@1:  * @see de.laures.cewolf.ChartImage
franta-hg@1:  */
franta-hg@1: public class ChartImageDefinition implements ChartImage, ChartHolder, Serializable {
franta-hg@1: 	
franta-hg@1:     private static final Log log = LogFactory.getLog(ChartImageDefinition.class);
franta-hg@1: 
franta-hg@1: 	private final ChartHolder chartHolder;
franta-hg@1: 	private final int height;
franta-hg@1: 	private final int width;
franta-hg@1: 	private final int type;
franta-hg@1: 	private final String mimeType;
franta-hg@1: 	transient private final Date timeoutTime;
franta-hg@1: 	
franta-hg@1: 	private RenderedImage renderedImage;
franta-hg@1: 
franta-hg@1: 	/**
franta-hg@1: 	 * Constructor for ChartImage
franta-hg@1: 	 */
franta-hg@1: 	public ChartImageDefinition(ChartHolder ch, int width, int height, int type, String mimeType, int timeout) {
franta-hg@1: 		if(width <= 0 || height <= 0){
franta-hg@1: 			throw new IllegalArgumentException("ChartImage with height or width <= 0 is illegal");
franta-hg@1: 		}
franta-hg@1: 		this.chartHolder = ch;
franta-hg@1: 		this.width = width;
franta-hg@1: 		this.height = height;
franta-hg@1: 		this.type = type;
franta-hg@1: 		this.mimeType = mimeType;
franta-hg@1:     Calendar cal = new GregorianCalendar();
franta-hg@1:     cal.add(Calendar.SECOND,timeout);
franta-hg@1:     this.timeoutTime = cal.getTime();
franta-hg@1: 	}
franta-hg@1: 		
franta-hg@1: 	/**
franta-hg@1: 	 * Returns the height.
franta-hg@1: 	 * @return int
franta-hg@1: 	 */
franta-hg@1: 	public int getHeight() {
franta-hg@1: 		return height;
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	/**
franta-hg@1: 	 * Returns the width.
franta-hg@1: 	 * @return int
franta-hg@1: 	 */
franta-hg@1: 	public int getWidth() {
franta-hg@1: 		return width;
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	public int getType() {
franta-hg@1: 		return type;
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	public Object getChart() throws DatasetProduceException, ChartValidationException, PostProcessingException {
franta-hg@1: 		return chartHolder.getChart();
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	public Object getDataset() throws DatasetProduceException {
franta-hg@1: 		return chartHolder.getDataset();
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	/**
franta-hg@1: 	 * Returns the mimeType.
franta-hg@1: 	 * @return String
franta-hg@1: 	 */
franta-hg@1: 	public String getMimeType() {
franta-hg@1: 		return mimeType;
franta-hg@1: 	}
franta-hg@1: 	
franta-hg@1: 	/**
franta-hg@1: 	 * @see java.lang.Object#finalize()
franta-hg@1: 	 */
franta-hg@1: 	protected void finalize() throws Throwable {
franta-hg@1: 		super.finalize();
franta-hg@1: 		log.debug(this + " finalized.");
franta-hg@1: 	}
franta-hg@1: 	
franta-hg@1: 	/**
franta-hg@1: 	 * @see de.laures.cewolf.ChartImage#getRenderingInfo()
franta-hg@1: 	 */
franta-hg@1: 	public Object getRenderingInfo() throws CewolfException {
franta-hg@1: 		ensureRendered();
franta-hg@1: 		return renderedImage.renderingInfo;
franta-hg@1: 	}
franta-hg@1: 	
franta-hg@1: 	public byte[] getBytes() throws CewolfException{
franta-hg@1: 		ensureRendered();
franta-hg@1: 		return renderedImage.data;
franta-hg@1: 	}
franta-hg@1: 	
franta-hg@1: 	private void ensureRendered() throws CewolfException{
franta-hg@1: 		if(renderedImage == null){
franta-hg@1: 			renderedImage = Renderer.render(this, chartHolder.getChart());
franta-hg@1: 			onImageRendered(renderedImage);
franta-hg@1: 		}
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	/**
franta-hg@1: 	 * @see de.laures.cewolf.ChartImage#getSize()
franta-hg@1: 	 */
franta-hg@1: 	public int getSize() throws CewolfException {
franta-hg@1: 		ensureRendered();
franta-hg@1: 		return renderedImage.data.length;
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	/* (non-Javadoc)
franta-hg@1: 	 * @see de.laures.cewolf.ChartImage#getTimeoutTime()
franta-hg@1: 	 */
franta-hg@1: 	public Date getTimeoutTime() {
franta-hg@1: 		return timeoutTime;
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: 	/**
franta-hg@1: 	 * Implemented onImageRendered method.
franta-hg@1: 	 * @see de.laures.cewolf.ChartHolder#onImageRendered(de.laures.cewolf.util.RenderedImage).
franta-hg@1: 	 * @param renderedImage The image
franta-hg@1: 	 */
franta-hg@1: 	private void onImageRendered(RenderedImage renderedImage) {
franta-hg@1: 		if (chartHolder instanceof ChartImageRenderListener) {
franta-hg@1: 			// delegate to chartHolder if it's interested...
franta-hg@1: 			((ChartImageRenderListener) chartHolder).onImageRendered(renderedImage);
franta-hg@1: 		}
franta-hg@1: 	}
franta-hg@1: 
franta-hg@1: }