TableStatusDScriptlet


1   package net.sf.jasperreports.mysql.reports;
2   
3   import java.awt.Color  ;
4   
5   import net.sf.jasperreports.engine.JRDefaultScriptlet;
6   import net.sf.jasperreports.engine.JRRenderable;
7   import net.sf.jasperreports.engine.JRScriptletException;
8   import net.sf.jasperreports.renderers.JCommonDrawableRenderer;
9   
10  import org.jfree.chart.ChartFactory;
11  import org.jfree.chart.JFreeChart;
12  import org.jfree.data.general.DefaultPieDataset;
13  
14  /**
15   *
16   */
17  public class TableStatusDScriptlet extends JRDefaultScriptlet 
18  {
19  
20      /**
21       *
22       */
23      private DefaultPieDataset pieDataset = null;
24      private Long   other = null;
25      
26      /**
27       *
28       */
29      public void afterGroupInit(String   group) throws JRScriptletException
30      {
31          if ("DatabaseGroup".equals(group))
32          {
33              pieDataset = new DefaultPieDataset();
34              other = null;
35          }
36      }
37  
38      /**
39       *
40       */
41      public void afterDetailEval() throws JRScriptletException
42      {
43          String   name = (String  )getFieldValue("name");
44          Number   size = (Number  )getFieldValue("rows");
45  
46          if (size == null)
47          {
48              size = new Long  (0);
49          }
50          
51          if (((Number  )getVariableValue("DatabaseGroup_COUNT")).intValue() >= 6)
52          {
53              if (other == null)
54              {
55                  other = new Long  (0);
56              }
57              other = new Long  (other.longValue() + size.longValue());
58              name = "Other";
59              size = other;
60          }
61          
62          pieDataset.setValue(name, size);
63      }
64  
65      /**
66       *
67       */
68      public JRRenderable getChart()
69      {
70          JFreeChart chart = 
71              ChartFactory.createPieChart(
72                  "Table rows", 
73                  pieDataset, 
74                  true, 
75                  true, 
76                  false
77                  );
78          
79          chart.setBackgroundPaint(Color.white);
80          chart.getPlot().setOutlinePaint(Color.white);
81          
82          return new JCommonDrawableRenderer(chart);
83      }
84  
85  }
86
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