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Java > Open Source Codes > edu > rice > cs > drjava > config > NonNegativeIntegerOption


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33
34 package edu.rice.cs.drjava.config;
35
36 /** Class defining all configuration options with values of type NonNegativeInteger.
37  * @version $Id: NonNegativeIntegerOption.java 3888 2006-06-15 12:06:50Z rcartwright $
38  */
39 public class NonNegativeIntegerOption extends IntegerOption {
40   
41   /** @param key The name of this Option.
42    * @param def The default value for this option
43    */
44   public NonNegativeIntegerOption(String JavaDoc key, Integer JavaDoc def) { super(key,def); }
45
46   /** @param s The String to be parsed.
47    * @return The Integer object represented by "s".
48    * @exception IllegalArgumentException if "s" does not represent an non-negative integer value: only Strings that
49    * can be generated by the method NonNegativeInteger.toString() are supported.
50    */
51   public Integer JavaDoc parse(String JavaDoc s) {
52     int value;
53     try {
54       value = Integer.parseInt(s);
55       if (value < 0)
56         throw new OptionParseException(name, s, "Must be a non-negative integer value.");
57       return new Integer JavaDoc(value);
58     }
59     catch (NumberFormatException JavaDoc e) {
60       throw new OptionParseException(name, s, "Must be a non-negative integer value.");
61     }
62   }
63 }
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