DefaultFailureDetailView


1   package junit.swingui;
2   
3   import java.awt.Component  ;
4   import java.awt.Font  ;
5   import java.util.StringTokenizer  ;
6   import java.util.Vector  ;
7   
8   import javax.swing.AbstractListModel  ;
9   import javax.swing.DefaultListCellRenderer  ;
10  import javax.swing.JList  ;
11  import javax.swing.ListSelectionModel  ;
12  
13  import junit.framework.TestFailure;
14  import junit.runner.BaseTestRunner;
15  import junit.runner.FailureDetailView;
16  
17  /**
18   * A view that shows a stack trace of a failure
19   */
20  public class DefaultFailureDetailView implements FailureDetailView {
21      JList   fList;  
22      
23      /**
24       * A ListModel representing the scanned failure stack trace.
25       */
26      static class StackTraceListModel extends AbstractListModel   {
27          private Vector   fLines= new Vector  (20);
28          
29          public Object   getElementAt(int index) {
30              return fLines.elementAt(index);
31          }
32  
33          public int getSize() {
34              return fLines.size();
35          }
36          
37          public void setTrace(String   trace) {
38              scan(trace);
39              fireContentsChanged(this, 0, fLines.size());
40          }
41          
42          public void clear() {
43              fLines.removeAllElements();
44              fireContentsChanged(this, 0, fLines.size());
45          }
46          
47          private void scan(String   trace) {
48              fLines.removeAllElements();
49              StringTokenizer   st= new StringTokenizer  (trace, "\n\r", false);
50              while (st.hasMoreTokens()) 
51                  fLines.addElement(st.nextToken());
52          }
53      }
54      
55      /**
56       * Renderer for stack entries
57       */
58      static class StackEntryRenderer extends DefaultListCellRenderer   {
59                          
60          public Component   getListCellRendererComponent(
61                  JList   list, Object   value, int modelIndex, 
62                  boolean isSelected, boolean cellHasFocus) {
63              String   text= ((String  )value).replace('\t', ' ');
64              Component   c= super.getListCellRendererComponent(list, text, modelIndex, isSelected, cellHasFocus);
65              setText(text);
66              setToolTipText(text);
67              return c;
68          }
69      }
70      
71      /**
72       * Returns the component used to present the trace
73       */
74      public Component   getComponent() {
75          if (fList == null) {
76              fList= new JList  (new StackTraceListModel());
77              fList.setFont(new Font  ("Dialog", Font.PLAIN, 12));
78              fList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
79              fList.setVisibleRowCount(5);
80              fList.setCellRenderer(new StackEntryRenderer());
81          }
82          return fList;
83      }
84      
85      /**
86       * Shows a TestFailure
87       */
88      public void showFailure(TestFailure failure) {
89          getModel().setTrace(BaseTestRunner.getFilteredTrace(failure.trace()));
90      }
91      /**
92       * Clears the output.
93       */
94      public void clear() {
95          getModel().clear();
96      }
97      
98      private StackTraceListModel getModel() {
99          return  (StackTraceListModel)fList.getModel();
100     }
101 }
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