mcapacitycommand.java

基于Java的软件信息系统－项目管理

package cmd;

import core.*;
import db.*;
import java.text.ParseException;
import java.util.*;
import ui.CapacityDisplayDialog;
import ui.EnterDateDialog;

public class MCapacityCommand extends MDatabaseCommand
{
    private static final String [] PARAM_NAMES =
    { "date" };
    private static final String [] PARAM_PROMPTS =
    { "Enter date (mm/dd/yy):" };
    
    public MCapacityCommand ()
	throws java.io.IOException
    {
	super ();
    }

    public String [] getParameterNames ()
    {
	return PARAM_NAMES;
    }
    
    public String [] getParameterPrompts ()
    {
	return PARAM_PROMPTS;
    }

    public void setParametersGUI ()
    {
        EnterDateDialog dlog = new EnterDateDialog (this);
        if (!dlog.isCanceled ())
        {
            setParameter("date", 
                         DBUtilities.formatDate (dlog.getDate()));
	    setInitialized ();
        }
    }

    protected void executeDatabaseCommand (HotelDB database)
    {
	try 
        {
            String dateString = getParameter ("date");
            Date reportDate = DBUtilities.parseDate (dateString);
	    List capInfoList = database.getCapacity (reportDate);
            displayResults ("Capacity Report", capInfoList);
	} catch (java.text.ParseException e)
	{
	    System.err.println ("CapacityCommand: Error in date format: " +
				getParameter ("date"));
	    System.err.println ("Command not executed.");
	}
    }

    protected void displayResultsGUI (String title, List capInfoList)
    {
        new CapacityDisplayDialog (getFrame(), title, capInfoList);
    }

    protected void displayResultsText (String title, List capInfoList)
    {
        System.out.println (title);
        if (capInfoList.size() == 0)
        {
            System.out.println ("  No reservations");
            return;
        }		
        Iterator capIter = capInfoList.iterator ();
        while (capIter.hasNext())
        {
            CapacityInfo capInfo = (CapacityInfo) capIter.next();
            System.out.println ("   " + capInfo.getCount() + "\t" +
                Reservation.getDescription(capInfo.getRoomType()));
        }
    }

    public String getMenuName ()
    { return "Capacity..."; }
    public String getName ()
    { return "capacity"; }
    public String getDescription ()
    { 
	return "Prints a capacity report for a particular date.";
    }
    public Command makeInstance ()
    {
	try
	{
	    return new MCapacityCommand ();
	} catch (java.io.IOException e)
	{
	    return null;
	}
    }
}