package org.xmlsh.commands.util;

import java.util.ArrayList;

/**
 * 
 * 
 * @author David A. Lee
 * @version $Revision$
 */
public class CSVParser
{
	private char mDelim = ','; // csv
	private char mQuote = '"';
	private int mMax ;
	
	
	
	
	
	public CSVParser() {
		
		
	}
	
	public CSVParser( char delim , char quote )
	{
		mDelim = delim ;
		mQuote = quote ;
		mMax   = 0;
	}
	
	public CSVParser( char delim , char quote , int max )
	{
		mDelim = delim ;
		mQuote = quote ;
		mMax   = max ;
	}
	

	/**
     * Parse a single line into String[] each string is 1 csv field
     * If combine 
     */
     
    public CSVRecord parseLine( String line ){
    	if( line == null )
    		return null;
    	
        ArrayList<String>v = new ArrayList<String>();

        int len = line.length();
        char c;
        int i;
        boolean sof = true ; // start of field
        
        StringBuffer	buf = new StringBuffer();
        for( i = 0 ; i < len ; )
        {
        	c = line.charAt(i++);
        	
        	if( c == mDelim && (mMax <= 0 ||  mMax > v.size() )){
        		v.add( buf.toString());
        		buf = new StringBuffer();
        		sof = true ;
        		continue;
        	}
        	// Start quotes only recognized at sof
        	if( sof && c == mQuote ){
        		while ( i < len ){
        			c = line.charAt(i++);
        			if( c == mQuote ){
        				if( i == len || (i < len && line.charAt(i) != mQuote ) )
        					break;
        				c = line.charAt(i++);
        			}
        			buf.append(c);
        		}
        	}
        	else
        		buf.append(c);
        	sof=false ;
        }
        
        // Left over data - add a new field or combine with the last one
        if( i>0 ){
        	if( mMax <= 0 || mMax > v.size() ) 
        			v.add( buf.toString());
        	else {
        		int last = v.size() - 1;
        		
        		v.set( last , v.get(last) + buf.toString() );
        	}
        }
        
        
        
        

        return new CSVRecord( (String[]) v.toArray( new String[ v.size() ] )  );
        
    }


    

}

//
//
//Copyright (C) 2008-2014    David A. Lee.
//
//The contents of this file are subject to the "Simplified BSD License" (the "License");
//you may not use this file except in compliance with the License. You may obtain a copy of the
//License at http://www.opensource.org/licenses/bsd-license.php 
//
//Software distributed under the License is distributed on an "AS IS" basis,
//WITHOUT WARRANTY OF ANY KIND, either express or implied.
//See the License for the specific language governing rights and limitations under the License.
//
//The Original Code is: all this file.
//
//The Initial Developer of the Original Code is David A. Lee
//
//Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
//Contributor(s): none.
//