/*
 * [TestRegexFindInsensitive.java]
 *
 * Summary: Finding with a Regex, case-insensitive. Prove \\p{lower] trumps CASE_INSENSITIVE.
 *
 * Copyright: (c) 2011-2017 Roedy Green, Canadian Mind Products, http://mindprod.com
 *
 * Licence: This software may be copied and used freely for any purpose but military.
 *          http://mindprod.com/contact/nonmil.html
 *
 * Requires: JDK 1.8+
 *
 * Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
 *
 * Version History:
 *  1.0 2011-01-17 initial release
 */
package com.mindprod.example;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static java.lang.System.*;

/**
 * Finding with a Regex, case-insensitive. Prove \\p{lower] trumps CASE_INSENSITIVE.
 * <p/>
 * Use a regex to see repeated instances of a pattern embedded in a large string .
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 1.0 2011-01-17 initial release
 * @since 2011-01-17
 */
public class TestRegexFindInsensitive
    {
    /**
     * Regex pattern we look for embedded in big string. By default case-sensitive.
     */
    private static final Pattern pattern = Pattern.compile( "\\p{Lower}+", Pattern.CASE_INSENSITIVE );

    /**
     * test harness
     *
     * @param args not used
     */
    public static void main( String[] args )
        {
        final String lookIn = "apple pear 66 banana Orange LEMON pomegranATE ";
        final Matcher m = pattern.matcher( lookIn );  // Matchers are used both for matching and finding.
        while ( m.find() )
            {
            final int gc = m.groupCount();
            // group 0 is the whole pattern matched,
            // loops runs from from 0 to gc, not 0 to gc-1 as is traditional.
            for ( int i = 0; i <= gc; i++ )
                {
                out.println( i + " : " + m.group( i ) );
                }
            }
        // prints
        // 0 : apple
        // 0 : pear
        // 0 : banana
        // 0 : range
        // 0 : pomegran
        // in other words lower over-rides CASE_SENSITIVE. not upper case letters are matched
        }
    }