parser.java

moblie syncml mail javame

/*
 * Funambol is a mobile platform developed by Funambol, Inc. 
 * Copyright (C) 2003 - 2007 Funambol, Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by
 * the Free Software Foundation with the addition of the following permission 
 * added to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED
 * WORK IN WHICH THE COPYRIGHT IS OWNED BY FUNAMBOL, FUNAMBOL DISCLAIMS THE 
 * WARRANTY OF NON INFRINGEMENT  OF THIRD PARTY RIGHTS.
 * 
 * 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 Affero General Public License 
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA.
 * 
 * You can contact Funambol, Inc. headquarters at 643 Bair Island Road, Suite 
 * 305, Redwood City, CA 94063, USA, or at email address [e-mail].
 * 
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU Affero General Public License
 * version 3, these Appropriate Legal Notices must retain the display of the
 * "Powered by Funambol" logo. If the display of the logo is not reasonably 
 * feasible for technical reasons, the Appropriate Legal Notices must display
 * the words "Powered by Funambol".
 *
 *
 */

package com.funambol.mailclient.ui.utils;

import com.funambol.util.ChunkedString;
import java.util.Enumeration;
import java.util.Hashtable;
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() {
    }
    
    /*
     * Provides an enumeration of String containing links got from a text
     * Links can be URL or email addresses
     */
      
    public static Enumeration extractLinks(String text) {
        String[] sep = {
            " ", 
            "\n\r", 
            "\r\n",
            "\n", 
            ",", 
            "\r"};
        Hashtable links = new Hashtable();
        ChunkedString cs = new ChunkedString(text);

        String word;
        while ( (word=cs.getNextString(sep)) != null ) {
          
            if (isLink(word) || isMailAddress(word)){
                links.put(word, "");
            }
        }
        
        return links.keys();
    }
    
    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;
    }
    
    private static boolean isMailAddress(String word){
        //string like "@xxx.xxx" is not an email address
        //a valid email ends at least with "x.it"
        if(word.indexOf('@')>0 && word.indexOf('@')<(word.length()-4)){
            return true;
        }else{
            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;
        }
        
    }
    
    
}