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Java > Open Source Codes > de > laures > cewolf > ChartHolder


1 /* ================================================================
2  * Cewolf : Chart enabling Web Objects Framework
3  * ================================================================
4  *
5  * Project Info: http://cewolf.sourceforge.net
6  * Project Lead: Guido Laures (guido@laures.de);
7  *
8  * (C) Copyright 2002, by Guido Laures
9  *
10  * This library is free software; you can redistribute it and/or modify it under the terms
11  * of the GNU Lesser General Public License as published by the Free Software Foundation;
12  * either version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
15  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16  * See the GNU Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public License along with this
19  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20  * Boston, MA 02111-1307, USA.
21  */
22
23 package de.laures.cewolf;
24
25 /**
26  * An object of this type represents a full descritption of a chart.
27  * Therefore it is able to produce the chart and dataset object
28  * resulting out of this definition.
29  * @author Guido Laures
30  */
31 public interface ChartHolder {
32
33     /**
34      * Returns a chart. The type of this object is dependant on the underlying
35      * chart implementation. As of this version of Cewolf it is of type
36      * org.jfree.chart.JFreeChart.
37      * @return the chart object for this definition
38      * @throws DatasetProduceException if there could be no data produced for
39      * the cahrt
40      * @throws ConfigurationException if there is something wrong in the
41      * Cewolf configuration
42      * @throws PostProcessingException if a post processor failed to
43      * process the chart
44      */
45     public Object JavaDoc getChart() throws DatasetProduceException, PostProcessingException, ChartValidationException;
46     
47     /**
48      * Returns the dataset produced when using this definition.The type of this object is dependant on the underlying
49      * chart implementation. As of this version of Cewolf it is of type
50      * org.jfree.data.Dataset.
51      * @return Object the dataset for this definition
52      * @throws DatasetProduceException if the dataset could not be produced
53      */
54     public Object JavaDoc getDataset() throws DatasetProduceException;
55     
56 }
57
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