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;
franta-hg@1: 
franta-hg@1: import java.io.IOException;
franta-hg@1: import java.util.Date;
franta-hg@1: 
franta-hg@1: 
franta-hg@1: /**
franta-hg@1:  * A special ChartHolder which also holds the image presentation of the chart.
franta-hg@1:  * @author  Guido Laures
franta-hg@1:  */
franta-hg@1: public interface ChartImage {
franta-hg@1: 	
franta-hg@1: 	public static final int IMG_TYPE_CHART = 0;
franta-hg@1: 	public static final int IMG_TYPE_LEGEND = 1;
franta-hg@1:     
franta-hg@1: 	/**
franta-hg@1: 	 * Returns the width of the chart image in pixel.
franta-hg@1: 	 * @return the width of the chart image in pixel
franta-hg@1: 	 */
franta-hg@1:     public int getWidth();
franta-hg@1: 
franta-hg@1: 	/**
franta-hg@1: 	 * Returns the height of the chart image in pixel.
franta-hg@1: 	 * @return the height of the chart image in pixel
franta-hg@1: 	 */
franta-hg@1:     public int getHeight();
franta-hg@1:     
franta-hg@1: 	/**
franta-hg@1: 	 * Returns the type of the chart image.
franta-hg@1: 	 * @return the type of the chart image
franta-hg@1: 	 * @see #IMG_TYPE_CHART
franta-hg@1: 	 * @see #IMG_TYPE_LEGEND
franta-hg@1: 	 */
franta-hg@1:     public int getType();
franta-hg@1:     
franta-hg@1:     /**
franta-hg@1:      * Writes out a cached image to an outputstream. This method only marks the object
franta-hg@1:      * as accessed and therfore frees it for cache cleanup.
franta-hg@1:      * @param key the cache key
franta-hg@1:      * @param out the stream to write to
franta-hg@1:      * @throws IOException if an I/O error occured during write
franta-hg@1:      */
franta-hg@1:     public byte[] getBytes() throws CewolfException;
franta-hg@1:         
franta-hg@1:     /**
franta-hg@1:      * Returns the MIME type of this image.
franta-hg@1:      * @return the MIME type of the image
franta-hg@1:      */
franta-hg@1:     public String getMimeType();
franta-hg@1:         
franta-hg@1: 	/**
franta-hg@1: 	 * Returns the size of the image in bytes.
franta-hg@1: 	 * @return size of the image
franta-hg@1: 	 * @throws CewolfException if the size could not be determined
franta-hg@1: 	 */
franta-hg@1:     public int getSize() throws CewolfException;
franta-hg@1:     
franta-hg@1:     public Date getTimeoutTime();
franta-hg@1: }