parser.java

The Funambol J2ME Mail Client aims to be a light, easy to use, free email client for J2ME devices.

/*
 * Copyright (C) 2006-2007 Funambol
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *
 */

package com.funambol.mailclient.ui.utils;

import com.funambol.util.ChunkedString;
import com.funambol.util.Log;
import java.util.Enumeration;
import java.util.Vector;


public class Parser {
    private static String[] VALID_PREFIX= { "http://", "www.", "ftp://", "https://" } ;
    private static int MIN_PHONE_NUMER_LEN=4;
    
    /**
     * Creates a new instance of Parser
     */
    private Parser() {
    }
    
    public static Vector extractLinks(String text) {
        String[] sep = {
            " ", 
            "\n\r", 
            "\r\n",
            "\n", 
            ",", 
            "\r"};
        Vector links=new Vector();
        ChunkedString cs = new ChunkedString(text);
        
        String word;
        while ( (word=cs.getNextString(sep)) != null ) {
          
            if (isLink(word)) {
                links.addElement(word);
            }
        }
        
        return links;
    }
    
    public static Vector extractNumbers(String text) {
        Vector numbers=new Vector();
        
        Enumeration en=split(text).elements();
        while (en.hasMoreElements()) {
            String el=(String)en.nextElement();
            if (isPhoneNumber(el)) {
                numbers.addElement(el);
            }
        }
        
        return numbers;
        
    }
    
    
    public static Vector split( String text, String separator ){
        Vector result = new Vector();
        int start=0;
        //Log.debug("index=" + text.indexOf(separator));
        int pos=text.substring(start).indexOf(separator);
        //Log.debug("pos= "+ pos);
        while (pos !=-1) {
            
            //Log.debug("Adding -" + text.substring( start, start+pos ).trim()+"-");
            result.addElement(text.substring( start, start+pos ).trim());
            start+=pos+separator.length();
            pos=text.substring(start).indexOf(separator);
            //Log.debug("pos= "+ pos);
        }
        //Log.debug("Adding last entry: -" + text.substring(start).trim()+ "-");
        result.addElement(text.substring(start).trim());
        return result;
    }
    
    public static Vector split( String text){
        return split(text, " ");
    }
    
    private static boolean isLink(String el) {
        for (int i=0; i<VALID_PREFIX.length;i++) {
            // WARNING!! Be careful with turkish localization ,
            // turkish alphabet has 2 lower-case i, string comparison may
            // return unexpected results!!
            if ( el.toLowerCase().startsWith(VALID_PREFIX[i])) {
                return true;
            }
        }
        
        return false;
    }
    
    
    // TODO: use a real isPhoneNumber function i.e. that can handle
    // strings like (+39)02#8373311
    private static boolean isPhoneNumber(String el) {
        
        try {
            Integer.parseInt(el);
            if (el.length()>=MIN_PHONE_NUMER_LEN)
                return true;
            else
                return false;
        } catch (NumberFormatException ex){
           // here we don't need a log.error output, because we have no real error!
            return false;
        }
        
    }
    
    
}