//  SearchManyBetter.java  Copyright (c) 2005 Kari Laitinen

//  http://www.naturalprogramming.com

//  2005-06-28   File created.
//  2005-06-28   Last modification.

//  The AND and OR features are not implemented in this program.

//  A better solution to exercise 14-5.

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

class SearchManyBetter
{
   static void search_strings_in_file( String  file_name_from_caller,
                                       String[]  strings_to_be_searched )
   {
      try
      {
         BufferedReader file_to_read  =
             new BufferedReader( new FileReader( file_name_from_caller ) ) ;

         int   line_counter  =  0 ;
         boolean  end_of_file_encountered  =  false ;

         while ( end_of_file_encountered  ==  false )
         {
            String  text_line_from_file   =  file_to_read.readLine() ;

            if ( text_line_from_file  ==  null )
            {
               end_of_file_encountered  =  true ;
            }
            else
            {
               line_counter  ++ ;

               for ( int string_index  =  0 ;
                         string_index  <  strings_to_be_searched.length ;
                         string_index  ++ )
               {
                  String  string_to_be_searched  =
                                 strings_to_be_searched[ string_index ] ;

                  if ( text_line_from_file.indexOf(
                                     string_to_be_searched )  !=  -1 )
                  {
                     System.out.print( "\n String \"" +  string_to_be_searched
                                  + "\" was found on line "  +  line_counter ) ;
                  }
               }
            }
         }

         file_to_read.close() ;
      }
      catch ( FileNotFoundException caught_file_not_found_exception )
      {
         System.out.print( "\n Cannot open file " + file_name_from_caller ) ;
      }
      catch ( IOException caught_io_exception )
      {
         System.out.print( "\n\n  File processing error.  \n" ) ;
      }
   }


   public static void main( String[] command_line_parameters )
   {
      Scanner keyboard = new Scanner( System.in ) ;

      String[]  strings_to_be_searched ;

      String  file_name_given_by_user ;

      if ( command_line_parameters.length  > 1 )
      {
         strings_to_be_searched  =  new  String[
                         command_line_parameters.length  - 1 ] ;

         for ( int string_index  =  0 ;
                   string_index  <  strings_to_be_searched.length ;
                   string_index  ++ )
         {
            strings_to_be_searched[ string_index ]  =
                         command_line_parameters[ string_index  +  1 ] ;
         }

         file_name_given_by_user  =  command_line_parameters[ 0 ] ;
      }
      else
      {
         System.out.print( "\n This program can search a String in a "
                      + "\n text file. Give first the file name :  " ) ;

         file_name_given_by_user  =  keyboard.nextLine() ;

         System.out.print( "\n Type in the String to be searched: " ) ;

         String  string_to_be_searched    =  keyboard.nextLine() ;

         strings_to_be_searched  =  new  String[ 1 ] ;
         strings_to_be_searched[ 0 ]  =  string_to_be_searched ;
      }

      search_strings_in_file( file_name_given_by_user,
                              strings_to_be_searched ) ;
   }
}