helpcommand.java

基于Java的软件信息系统－项目管理

package core;

import java.util.*;

public class HelpCommand extends SimpleCommand
{
    public static CommandMap s_commandMap; 

    public static void setCommands (CommandMap cmdMap)
    {
        s_commandMap = cmdMap;
    }

    public String getMenuName ()
    {
	return "Help";
    }
    public String getName ()
    {
	return "help";
    }

    public String getDescription ()
    {
	return "Displays a list of legal commands";
    }

    public void executeCommand ()
    {
        displayResults ("Legal commands", 
                        db.DBUtilities.toList(s_commandMap.values()));
    }

    protected void displayResultsText (String title, List results)
    {
	System.out.println (title);
	for (Iterator iter = results.iterator();
	     iter.hasNext(); )
        {
	    Command cmd = (Command) iter.next();
	    if (!cmd.getName().equals("_unknown"))
	    {
		System.out.print (cmd.getName () + ": ");
		System.out.println (cmd.getDescription ());
	    }
	}
    }

    public void displayResultsGUI (List result)
    {
    }

    public Command makeInstance ()
    { return new HelpCommand (); }
}