1	// AvailableCommand.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	 * The WISE command to check available times
    11	 */
    12	public class AvailableCommand extends WISECommand
    13	{
    14	    private final static String USAGE =
    15		"usage: available courses|professors time\n" +
    16		"       available studentName|id";
    17	
    18	    /**
    19	     * Check for times.
    20	     *
    21	     * @param args the remainder of the command line.
    22	     * @param wise the current WISE.
    23	     *
    24	     * @exception WISEException for reporting errors
    25	     */
    26	    public void doIt( StringTokenizer args, WISE wise )
    27	    	 throws WISEException  
    28	    {
    29		Terminal t = wise.getTerminal();
    30		String firstArg = null;
    31		WISEList mainList = null;
    32		try {
    33		    firstArg = args.nextToken(); 
    34		    mainList = wise.get(firstArg);
    35		}
    36		catch( NoSuchElementException e ) {
    37		    throw new WISEException(USAGE);
    38		}
    39		catch( WISEException e) { 
    40		    // firstArg not a list, so try student name
    41		    Student student = wise.getStudent( firstArg );
    42		    TimeOfDay[] allTimes = TimeOfDay.getAllTimes();
    43		    for( int i = 0; i < allTimes.length; i++ ) {
    44			if (student.isAvailable( allTimes[i] )) {
    45			    t.println( allTimes[i] );
    46			}
    47		    }
    48		    return;
    49		}
    50		// now we have the list of courses or professors, 
    51		// so get the time of day
    52		TimeOfDay tod = null;
    53		try {
    54		    tod = new TimeOfDay( args.nextToken(), args.nextToken() );
    55		}
    56		catch( NoSuchElementException e ) {
    57		    throw new WISEException(USAGE);
    58		}
    59		Iterator i = mainList.iterator();
    60		while (i.hasNext()) {
    61		    WISEObject obj = (WISEObject)i.next();
    62		    if (obj.isAvailable( tod )) {
    63			t.println(obj.getName());
    64		    }
    65		}
    66	    }
    67	}