// this file formatted by JFormat - jlbalder@netscape.net
// 2021 FALL CS 445 PROJECT #2  STUDENT START FILE 
import java.io.*;
import java.util.*;

public class ArrBagTester
{
    public static void main(String args[]) throws Exception
    {
        if ( args.length < 2 ) die( "usage: java ArrBagTester <filename> <filename>\n" );
        // INSTANCE AN OBECT OF OUR GENERIC CLASS AND SPECIFY IT AS A CONTAINER OF TYPE ARRAY OF STRING
        
        ArrBag<String> bagStr1 = new ArrBag<String>();
        loadFromFile( bagStr1, args[0] );
        System.out.println( "\nbagStr1 loaded from " + args[0] + ": "  + bagStr1 );
        
        ArrBag<String> bagStr2 = new ArrBag<String>();
        loadFromFile( bagStr2, args[1] );
        System.out.println( "bagStr2 loaded from " + args[1] + ": "  + bagStr2 );
        
        System.out.println();
        
        ArrBag<String> unionStr = bagStr1.union( bagStr2 );
        System.out.println( "union: " + unionStr  );
        
        ArrBag<String> intersectStr = bagStr1.intersection( bagStr2 );
        System.out.println( "intersection: " + intersectStr  );
        
        ArrBag<String> diffStr = bagStr1.difference( bagStr2 );	// BAG1 - BA2.   ORDER MATTTERS
        System.out.println( "difference: " + diffStr  );
        
        ArrBag<String> xorStr = bagStr1.xor( bagStr2 );
        System.out.println( "xor: " + xorStr  );
        
        // ECHO BAG 1 & 2 TO PROVE THEY WERE NOT MODIFIED
        
        System.out.println();
        System.out.println( "bagStr1 after set ops: " + bagStr1 );
        System.out.println( "bagStr2 after set ops: " + bagStr2 );
        
        // CLEAR BAG 1 & 2 THEN PRINT ON ELAST TIME. SHOULD BE EMPTY!
        
        System.out.println(); bagStr1.clear() ; bagStr2.clear();
        System.out.println( "bagStr1 after clear: " + bagStr1 );
        System.out.println( "bagStr2 after clear: " + bagStr2 );
    }  // END MAIN
    
    static void die( String errMsg )
    {
        System.out.println( "\nFATAL ERROR: " + errMsg );
        System.exit(0);
    }
    
    static void loadFromFile( ArrBag<String> bag, String filename ) throws Exception
    {
        Scanner infile = new Scanner( new File( filename) );
        while( infile.hasNext() )
        bag.add( infile.next() );
        infile.close();
    }
}// END CLASS