01: /* ================================================================
02: * Cewolf : Chart enabling Web Objects Framework
03: * ================================================================
04: *
05: * Project Info: http://cewolf.sourceforge.net
06: * Project Lead: Guido Laures (guido@laures.de);
07: *
08: * (C) Copyright 2002, by Guido Laures
09: *
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 getChart() throws DatasetProduceException,
46: PostProcessingException, ChartValidationException;
47:
48: /**
49: * Returns the dataset produced when using this definition.The type of this object is dependant on the underlying
50: * chart implementation. As of this version of Cewolf it is of type
51: * org.jfree.data.Dataset.
52: * @return Object the dataset for this definition
53: * @throws DatasetProduceException if the dataset could not be produced
54: */
55: public Object getDataset() throws DatasetProduceException;
56:
57: }
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