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1   /*
2   	StatCvs - CVS statistics generation 
3   	Copyright (C) 2002  Lukasz Pekacki <lukasz@pekacki.de>
4   	http://statcvs.sf.net/
5       
6   	This library is free software; you can redistribute it and/or
7   	modify it under the terms of the GNU Lesser General Public
8   	License as published by the Free Software Foundation; either
9   	version 2.1 of the License, or (at your option) any later version.
10  
11  	This library is distributed in the hope that it will be useful,
12  	but WITHOUT ANY WARRANTY; without even the implied warranty of
13  	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  	Lesser General Public License for more details.
15  
16  	You should have received a copy of the GNU Lesser General Public
17  	License along with this library; if not, write to the Free Software
18  	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19      
20  	$RCSfile: RatioColumn.java,v $
21  	$Date: 2008/04/02 11:22:14 $
22  */
23  package net.sf.statcvs.reportmodel;
24  
25  import net.sf.statcvs.renderer.TableCellRenderer;
26  
27  /**
28   * A column showing the ratio between two {@link IntegerColumn}s.
29   * The two columns do not have to be shown in the table.
30   * 
31   * @author Richard Cyganiak <rcyg@gmx.de>
32   * @version $Id: RatioColumn.java,v 1.2 2008/04/02 11:22:14 benoitx Exp $
33   */
34  public class RatioColumn extends Column {
35  
36      private final String title;
37      private final IntegerColumn col1;
38      private final IntegerColumn col2;
39  
40      /**
41       * Creates a new <tt>RatioColumn</tt>, which contains the ratio
42       * between col1 and col2
43       * @param title the title for the column
44       * @param col1 the first column
45       * @param col2 the second column
46       */
47      public RatioColumn(final String title, final IntegerColumn col1, final IntegerColumn col2) {
48          this.title = title;
49          this.col1 = col1;
50          this.col2 = col2;
51      }
52  
53      /**
54       * @see net.sf.statcvs.reportmodel.Column#getRows()
55       */
56      public int getRows() {
57          return col1.getRows();
58      }
59  
60      /**
61       * @see net.sf.statcvs.reportmodel.Column#renderHead(net.sf.statcvs.renderer.TableCellRenderer)
62       */
63      public void renderHead(final TableCellRenderer renderer) {
64          renderer.renderCell(title);
65      }
66  
67      /**
68       * @see net.sf.statcvs.reportmodel.Column#renderCell
69       */
70      public void renderCell(final int rowIndex, final TableCellRenderer renderer) {
71          renderer.renderCell(getRatio(col1.getValue(rowIndex), col2.getValue(rowIndex)));
72      }
73  
74      /**
75       * @see net.sf.statcvs.reportmodel.Column#renderTotal(net.sf.statcvs.renderer.TableCellRenderer)
76       */
77      public void renderTotal(final TableCellRenderer renderer) {
78          renderer.renderCell(getRatio(col1.getSum(), col2.getSum()));
79      }
80  
81      private String getRatio(final int val1, final int val2) {
82          if (val2 == 0) {
83              return "-";
84          }
85          final int ratioTimes10 = (val1 * 10) / val2;
86          final double ratio = (double) ratioTimes10 / 10;
87          return Double.toString(ratio);
88      }
89  }