package  com.forward.test.goods;

 import  java.io.*;

 import  javax.xml.parsers.*;

 import  org.xml.sax.*;
 import  org.xml.sax.helpers.*;

 public   class  PhoneBookReader  extends  DefaultHandler
{
     private  String stringToSearch;
     private   final  String searchableTag = "surname";
     private   final  String dataTag = "number";
     public  PhoneBookReader (String search)
    {
         this .stringToSearch = search;
    }

     private  StringBuffer valueBuffer =  new  StringBuffer();

     private   boolean  found = false;
     private   boolean  getPhone = false;
     private  String lastSurname;


     public   void  endElement (String uri, String name, String qName)
             throws  SAXException
    {
        String val = valueBuffer.toString().trim();
         if  (val.length() >  0 ) {
             if  (qName.equals( this .dataTag)) {
                 if  (getPhone) {

                    System.out.println("FOUND PHONE '" + val + "' for '" + lastSurname + "'");
                    found = true;
                    getPhone = false;
                }
            }
             if  (qName.equals( this .searchableTag)) {
                 if  (val.equalsIgnoreCase( this .stringToSearch)) {
                    getPhone = true;
                    lastSurname = val;
                }
            }
        }
        valueBuffer =  new  StringBuffer();
    }

     public   void  characters ( char  ch[],  int  start,  int  length)
    {
         for  ( int  i = start; i < start + length; i++) {
             switch  (ch[i]) {
             case  '\\':
                 break ;
             case  '"':
                 break ;
             case  '\n':
                 break ;
             case  '\r':
                 break ;
             case  '\t':
                 break ;
             default :
                valueBuffer.append(ch[i]);
                 break ;
            }
        }
    }


     public   static   void  main (String args[])
             throws  Exception
    {
         if  (args.length !=  2 ) {
            System.out.println("Use PhoneBookReader <filename> <surnane>");
             return ;
        }  else  {

            System.out.println("Searching '" + args[1] + "' in file '" + args[0] + "'");

            PhoneBookReader reader =  new  PhoneBookReader(args[ 1 ]);

            SAXParserFactory factory = SAXParserFactory.newInstance();
            factory.setValidating(false);
            SAXParser parser = factory.newSAXParser();

            parser.parse( new  File(args[ 0 ]), reader);

             if  (!reader.found) {
                System.out.println("NO PHONES FOUND");
            }
        }
    }
}

<phonebook>

<entry>
     <firstname>
          Mark
     </firstname>
     <surname>
          Twain
     </surname>
     <number>+ 375   29   632494 </number>
</entry>
<entry>
     <firstname>
Jo</firstname>
     <surname>
          Dirty
               </surname>
     <number>
               + 375   29   332494 
          </number>
</entry>
<entry>
     <firstname>
          Andy
     </firstname>
     <surname>
          Ham
     </surname>
     <number>
          + 375   29   623494 
     </number>
</entry>
…
</phonebook>

 package  com.forward.test.goods;

 import  java.io.*;
 import  java.util.*;

 import  javax.xml.parsers.*;

 import  org.xml.sax.*;
 import  org.xml.sax.helpers.*;


 public   class  PhoneBookReader  extends  DefaultHandler
{
     private   final  String searchableTag = "surname";
     private   final  String dataTag = "number";

     private  Map<String, Collection<String>> cache =  new  HashMap<String, Collection<String>> ();

     public  PhoneBookReader ()
    {
    }

     private  StringBuffer valueBuffer =  new  StringBuffer();

     private  String lastSubject;

     public   void  endElement (String uri, String name, String qName)
             throws  SAXException
    {

        String val = valueBuffer.toString().trim();
         if  (val.length() >  0 ) {
             if  (qName.equals( this .dataTag)) {

                Collection<String> subjects = cache.get(lastSubject);
                 if  (subjects ==  null ) {
                    subjects =  new  ArrayList<String> ();
                    cache.put(lastSubject, subjects);
                }
                subjects.add(val);

                lastSubject =  null ;

            }  else   if  (qName.equals( this .searchableTag)) {
                lastSubject = val.toLowerCase();
            }
        }
        valueBuffer =  new  StringBuffer();
    }

     public   void  characters ( char  ch[],  int  start,  int  length)
    {
         for  ( int  i = start; i < start + length; i++) {
             switch  (ch[i]) {
             case  '\\':
                 break ;
             case  '"':
                 break ;
             case  '\n':
                 break ;
             case  '\r':
                 break ;
             case  '\t':
                 break ;
             default :
                valueBuffer.append(ch[i]);
                 break ;
            }
        }
    }
    
     public  Collection<String> getPhones(String surname) {
         return  cache.get(surname.toLowerCase());
    }


     public   static   void  main (String args[])
             throws  Exception
    {
         if  (args.length !=  2 ) {
            System.out.println("Use PhoneBookReader <filename> <surnane>");
             return ;
        }  else  {

            System.out.println("Searching '" + args[1] + "' in file '" + args[0] + "'");

            PhoneBookReader reader =  new  PhoneBookReader();

            SAXParserFactory factory = SAXParserFactory.newInstance();
            factory.setValidating(false);
            SAXParser parser = factory.newSAXParser();
            parser.parse( new  File(args[ 0 ]), reader);

            System.out.println("Search for surname '" + args[1] + "' = " + reader.getPhones(args[ 1 ]));
            System.out.println("Search for surname 'Ham' = " + reader.getPhones("Ham"));
            System.out.println("Search for surname 'kvakva' = " + reader.getPhones("kvakva"));

        }
    }
}