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/*
* $Id: substituteExample.java,v 1.9 2003/11/07 20:16:23 dfs Exp $
*
* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation", "Jakarta-Oro"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "Apache"
* or "Jakarta-Oro", nor may "Apache" or "Jakarta-Oro" appear in their
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*
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* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* .
*/
package examples;
import org.apache.oro.text.regex.*;
/**
* This is a test program demonstrating the use of the Util.substitute()
* method.
*
* @version @version@
*/
public final class substituteExample {
/**
* A good way for you to understand the substitute() method is to play around
* with it by using this test program. The program takes 3 to 5 arguments
* as follows:
* java substituteExample
* regex substitution input [sub limit] [interpolation limit]
* regex - A regular expression used to find parts of the input to be
* substituted.
* sub limit - An optional argument limiting the number of substitutions.
* If no limit is given, the limit used is Util.SUBSTITUTE_ALL.
* input - A string to be used as input for substitute().
* interpolation limit - An optional argument limiting the number of
* interpolations performed.
*
* Try the following command line for a simple example of subsitute().
* It changes (2,3) to (3,2) in the input.
* java substituteExample '\(2,3\)' '(3, 2)' '(1,2) (2,3) (4,5)'
*
* The following command line shows the substitute limit at work. It
* changed the first four 1's in the input to 4's.
* java substituteExample "1" "4" "381298175 1111" "4"
*
* The next command line shows how to use interpolations. Suppose we
* want to reverse the coordinates of the first 3 entries in the input
* and then have all the rest of the coordinates be equal to the new 3rd
* entry:
java substituteExample '\((\d+),(\d+)\)' '($2,$1)' '(1,2) (2,3) (4,5) (8,8) (9,2)' 5 3
*
*/
public static final void main(String args[]) {
int limit, interps;
PatternMatcher matcher = new Perl5Matcher();
Pattern pattern = null;
PatternCompiler compiler = new Perl5Compiler();
String regularExpression, input, sub, result;
// Make sure there are sufficient arguments
if(args.length < 3) {
System.err.println("Usage: substituteExample regex substitution " +
"input [sub limit] [interpolation limit]");
System.exit(1);
}
limit = Util.SUBSTITUTE_ALL;
interps = Perl5Substitution.INTERPOLATE_ALL;
regularExpression = args[0];
sub = args[1];
input = args[2];
if(args.length > 3)
limit = Integer.parseInt(args[3]);
if(args.length > 4)
interps = Integer.parseInt(args[4]);
try {
pattern = compiler.compile(regularExpression);
System.out.println("substitute regex: " + regularExpression);
} catch(MalformedPatternException e){
System.err.println("Bad pattern.");
System.err.println(e.getMessage());
System.exit(1);
}
// Perform substitution and print result.
result = Util.substitute(matcher, pattern,
new Perl5Substitution(sub, interps),
input, limit);
System.out.println("result: " + result);
}
}
