KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > de > laures > cewolf > taglib > PlotTypes


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.taglib;
24
25 import java.util.Arrays JavaDoc;
26 import java.util.List JavaDoc;
27
28 import org.jfree.chart.renderer.AbstractRenderer;
29 import org.jfree.chart.renderer.category.AreaRenderer;
30 import org.jfree.chart.renderer.category.BarRenderer;
31 import org.jfree.chart.renderer.category.LineAndShapeRenderer;
32 import org.jfree.chart.renderer.xy.CandlestickRenderer;
33 import org.jfree.chart.renderer.xy.HighLowRenderer;
34 import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
35 import org.jfree.chart.renderer.xy.XYAreaRenderer;
36 import org.jfree.chart.renderer.xy.XYBarRenderer;
37 import org.jfree.chart.renderer.xy.XYStepRenderer;
38
39 /**
40  * Contains the list of all possible plot type string values which can be used
41  * in the <code>type</code> attribute of a &lt;chart&gt; tag.
42  *
43  * It also contains all the renders that correspond with the plot types
44  * @author Chris McCann
45  */
46 public class PlotTypes {
47
48     /** All type strings in an array */
49     public static final String JavaDoc[] typeNames =
50         {
51             "xyarea",
52             "xyline",
53             "xyshapesandlines",
54             "scatter",
55             "xyverticalbar",
56             "step",
57             "candlestick",
58             "highlow",
59             "signal",
60             "verticalbar",
61             "area",
62             "line",
63             "shapesandlines" };
64
65     /**
66      * The whole typeNames array inside of a list.
67      * @see #typeNames
68      */
69     private static final List JavaDoc typeList = Arrays.asList(typeNames);
70     
71     /**
72      * Create a renderer for the given type index.
73      * We create a new renderer instance for each chart, because they may want to customize
74      * it in a post-processor.
75      *
76      * @param idx The index of the type
77      * @return A new renderer instance
78      */
79     public static AbstractRenderer getRenderer(int idx) {
80         switch (idx) {
81             case 0: return new XYAreaRenderer();
82             case 1: return new StandardXYItemRenderer();
83             case 2: return new StandardXYItemRenderer(StandardXYItemRenderer.SHAPES_AND_LINES);
84             case 3: return new StandardXYItemRenderer(StandardXYItemRenderer.SHAPES);
85             case 4: return new XYBarRenderer();
86             case 5: return new XYStepRenderer();
87             case 6: return new CandlestickRenderer();
88             case 7: return new HighLowRenderer();
89             //case 8: return new SignalRenderer();
90 case 9: return new BarRenderer();
91             case 10: return new AreaRenderer();
92             case 11: return new LineAndShapeRenderer(true,false);
93             case 12: return new LineAndShapeRenderer(true,true);
94             default:
95                 throw new RuntimeException JavaDoc("Invalid renderer index:" + idx);
96         }
97     }
98
99     private PlotTypes() {
100     }
101
102     /**
103      * Get the renderer index for the given plot type.
104      * @param plotType The type string of the plot
105      * @return The index The index of renderer
106      * @throws AttributeValidationException if unknown type
107      */
108     public static int getRendererIndex(String JavaDoc plotType) throws AttributeValidationException {
109         int rendererIndex = PlotTypes.typeList.indexOf(plotType.toLowerCase());
110         if (rendererIndex < 0) {
111           throw new AttributeValidationException("plot.type", plotType);
112         }
113         return rendererIndex;
114     }
115
116 }
117
Popular Tags