1 /* ================================================================
2 * Cewolf : Chart enabling Web Objects Framework
3 * ================================================================
5 * Project Info: http://cewolf.sourceforge.net
6 * Project Lead: Guido Laures (guido@laures.de);
8 * (C) Copyright 2002, by Guido Laures
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.
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.
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.
23 package de.laures.cewolf;
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
31 public interface ChartHolder {
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
40 * @throws ConfigurationException if there is something wrong in the
41 * Cewolf configuration
42 * @throws PostProcessingException if a post processor failed to
45 public Object getChart() throws DatasetProduceException, PostProcessingException, ChartValidationException;
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
54 public Object getDataset() throws DatasetProduceException;