1	// FileCommand.java
     2	//
     3	// For final project, cs110. 
     4	// Based on Juno shell command.
     5	// Ethan Bolker  Spring 2004
     6	
     7	import java.io.*;
     8	import java.util.*;
     9	
    10	/**
    11	 * The WISE command to write a requested list to a file.
    12	 */
    13	public class FileCommand extends OutputCommand 
    14	{
    15	    private final static String USAGE =
    16		"usage: file filename students|courses|professors [name]";
    17	
    18	    private BufferedWriter outStream = null;
    19	
    20	    public void output( String string ) 
    21		throws WISEException
    22	    {
    23		try {
    24		    outStream.write( string );
    25		    outStream.newLine();
    26		}
    27		catch (IOException e) {
    28		    throw new WISEException( e.getMessage() );
    29		}
    30	    }
    31	
    32	    public void cleanUp( )
    33		throws WISEException
    34	    {
    35		try {
    36		    outStream.close();
    37		}
    38		catch (IOException e) {
    39		    throw new WISEException( e.getMessage() );
    40		}
    41	    }
    42	
    43	    /**
    44	     * Write a requested list to a file.
    45	     *
    46	     * @param args the remainder of the command line.
    47	     * @param wise the current WISE.
    48	     *
    49	     * @exception WISEException for reporting errors
    50	     */
    51	    public void doIt( StringTokenizer args, WISE wise )
    52	    	 throws WISEException  
    53	    {
    54		String fileName = null;
    55		try {
    56		    fileName  = args.nextToken();
    57		    outStream = new BufferedWriter(new FileWriter(fileName));
    58		}
    59		catch( NoSuchElementException e ) {
    60		    throw new WISEException(USAGE);
    61		}
    62		catch( Exception e ) {
    63		    throw new WISEException( e.getMessage() );
    64		}
    65		super.doIt( args, wise );
    66	    }
    67	}