1	// OutputCommand.java
     2	//
     3	// For final project, cs110. 
     4	// Based on Juno shell command.
     5	// Ethan Bolker  Spring 2004
     6	
     7	import java.util.*;
     8	
     9	/**
    10	 * Abstract command to generate WISE output.
    11	 *
    12	 * @see TypeCommand
    13	 * @see FileCommand
    14	 */
    15	public abstract class OutputCommand extends WISECommand 
    16	{
    17	    /**
    18	     * Output a requested list.
    19	     *
    20	     * @param args the remainder of the command line.
    21	     * @param wise the current WISE.
    22	     *
    23	     * @exception WISEException for reporting errors
    24	     */
    25	    public void doIt( StringTokenizer args, WISE wise )
    26		 throws WISEException  
    27	    {
    28		try {
    29		    String listName   = args.nextToken();
    30		    WISEList mainList = wise.get(listName);
    31		    if (! args.hasMoreTokens() ) {
    32			output( mainList.getPrintableList());
    33			return;
    34		    }
    35		    String wiseObjectName = args.nextToken();
    36		    WISEObject wiseObject = mainList.get(wiseObjectName);
    37		    WISEList subList      = wiseObject.getList();
    38		    output( subList.getPrintableList());
    39		}
    40		catch( WISEException e ) {
    41		    throw e;
    42		}
    43		finally {
    44		    cleanUp();
    45		}
    46	    }
    47	
    48	    public abstract void output( String string )
    49		throws WISEException;
    50	
    51	    public void cleanUp( )
    52		throws WISEException
    53	    {
    54	    }
    55	}