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55  * by Daniel F. Savarese. We appreciate his contributions.
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57
58 import org.apache.oro.text.regex.*;
59 import org.apache.oro.text.awk.*;
60
61 /**
62  * This is a test program demonstrating the use of the Util.substitute()
63  * method. It is the same as the version in the OROMatcher distribution
64  * except that it uses Awk classes instead of Awk classes.
65  *
66  @author <a HREF="dfs@savarese.org">Daniel F. Savarese</a>
67  @version $Id: substituteExample.java,v 1.1.1.1 2000/07/23 23:08:48 jon Exp $
68  */
69 public final class substituteExample {
70
71   /**
72    * A good way for you to understand the substitute() method is to play around
73    * with it by using this test program. The program takes 3 to 5 arguments
74    * as follows:
75    * java substituteExample
76    * regex substitution input [sub limit] [interpolation limit]
77    * regex - A regular expression used to find parts of the input to be
78    * substituted.
79    * sub limit - An optional argument limiting the number of substitutions.
80    * If no limit is given, the limit used is Util.SUBSTITUTE_ALL.
81    * input - A string to be used as input for substitute().
82    * interpolation limit - An optional argument limiting the number of
83    * interpolations performed.
84    *
85    * Try the following command line for a simple example of subsitute().
86    * It changes (2,3) to (3,2) in the input.
87    * java substituteExample '\(2,3\)' '(3, 2)' '(1,2) (2,3) (4,5)'
88    *
89    * The following command line shows the substitute limit at work. It
90    * changed the first four 1's in the input to 4's.
91    * java substituteExample '1' '4' '381298175 1111'
92    */
93   public static final void main(String JavaDoc args[]) {
94     int limit, interps, i;
95     PatternMatcher matcher = new AwkMatcher();
96     Pattern pattern = null;
97     PatternCompiler compiler = new AwkCompiler();
98     String JavaDoc regularExpression, input, result;
99     Substitution sub;
100
101     // Make sure there are sufficient arguments
102 if(args.length < 3) {
103       System.err.println("Usage: substituteExample regex substitution " +
104              "input [sub limit]");
105       System.exit(1);
106     }
107
108     limit = Util.SUBSTITUTE_ALL;
109
110     regularExpression = args[0];
111     sub = new StringSubstitution(args[1]);
112     input = args[2];
113
114     if(args.length > 3)
115       limit = Integer.parseInt(args[3]);
116
117     try {
118       pattern = compiler.compile(regularExpression);
119       System.out.println("substitute regex: " + regularExpression);
120     } catch(MalformedPatternException e){
121       System.err.println("Bad pattern.");
122       System.err.println(e.getMessage());
123       System.exit(1);
124     }
125
126     // Perform substitution and print result.
127 result = Util.substitute(matcher, pattern, sub, input, limit);
128     System.out.println("result: " + result);
129   }
130 }
131
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