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A Java library for reading Apache httpd configuration files
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *
 *   Copyright (C) 2010-2014 Christian Bockermann 
 *    
 *   This file is part of the jwall.org apache-config library. The apache-config library is
 *   a parsing library to handle Apache HTTPD configuration files.
 *
 *   More information and documentation for the jwall-tools can be found at
 *   
 *                      http://www.jwall.org/apache-config
 *   
 *   This program is free software; you can redistribute it and/or modify it under
 *   the terms of the GNU General Public License as published by the Free Software
 *   Foundation; either version 3 of the License, or (at your option) any later version.
 *   
 *   This program is distributed in the hope that it will be useful, but WITHOUT ANY
 *   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 *   FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 *   You should have received a copy of the GNU General Public License along with this 
 *   program; if not, see .
 *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
package org.jwall.apache.httpd.config;

import java.util.ArrayList;
import java.util.List;


/**
 * 
 * This class implements a split-method which takes care of quoted strings, i.e. there will be no
 * split within a char sequence that is surrounded by quotes (single or double quotes). These sequences
 * are simply skipped.
 * 
 * 
 * @author Christian Bockermann <[email protected]>
 */
public class QuotedStringTokenizer {
    
    
    public static List splitRespectQuotes( String input, char sep ){

        List results = new ArrayList();
        int last = 0;
        int i = 0;
        
        while( i <= input.length() - 1 ){
            char c = input.charAt( i );
            
            
            // we skip quoted substrings 
            //
            if( c == '"' || c == '\'' ){
                do {
                    i++;
                    //char d = input.charAt( i );
                } while( i < input.length() && (input.charAt( i ) != c || input.charAt( i - 1 ) == '\\' ) );
            }
            
            // if we hit a separating character, we found another token
            //
            if( input.indexOf( sep, i ) == i  || i+1 == input.length() ){
                if( i + 1 == input.length() )
                    results.add( input.substring( last, i + 1 ) );
                else
                    results.add( input.substring( last, i ) );
                last = i + 1;
            }
            
            i++;
        }
        
        return results;
    }
}