SummaryAttribute


1   /* SummaryAttribute.java */
2   
3   package org.quilt.frontend.ant;
4   
5   import org.apache.tools.ant.BuildException;
6   
7   /**
8    * Accept a limited set of String values for the summary attribute. 
9    */
10  public class SummaryAttribute {
11  
12      private String   value;
13      private boolean bVal;
14  
15      /**
16       * Constructor.
17       * @param v A candidate value; causes exception if invalid.
18       */
19      public SummaryAttribute (String   v) {
20          setValue (v);
21      }
22      /**
23       * Return the value successfully set.
24       * 
25       * @return The String passed as the value of the summary attribute. 
26       */
27      public String   getValue() {
28          return value;
29      }
30      /** 
31       * Ant-compatible set method.  Interprets on/true/withoutanderr/yes
32       * as true, false/no/off as false, and throws exception otherwise.
33       * 
34       * @param v String, converted to lower case before checking.
35       */
36      public final void setValue (String   value) throws BuildException {
37          this.value = value.toLowerCase();
38          if ( value.equals("on") || value.equals("true")  
39                  || value.equals("withoutanderr") || value.equals("yes") ) { 
40              bVal = true;
41          } else if ( value.equals("false") || value.equals("no") 
42                                                  || value.equals("off" ) ) {
43              bVal = false;
44          } else {
45              throw new BuildException(
46                      "invalid summary attribute value: " + value);
47          }
48      }
49      /** 
50       * @return True if the value was on/true/withoutanderr/yes, false
51       * otherwise.
52       */
53      public boolean asBoolean() {
54          return bVal;
55      }
56  }
57
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