balancecommand.java

国外的数据结构与算法分析用书

package Commands;

import Interfaces.StaffInterface;
import Sets.AccountSetAccess;
import Accounts.Account;
import SystemEntities.*;
import dslib.exception.ItemNotFoundUosException;

/**	Command to obtain the balance for an account. */
public class BalanceCommand extends Command
{
	/**	The interface to be used for this command. */
	protected StaffInterface cmdInterface;

	/**	The balance command constructor. */
	public BalanceCommand(StaffInterface userInterface)
	{
		cmdInterface = userInterface;
	}

	/**	Execute the balance command. */
	public void execute()
	{
		date = Clock.date();
		int acctID = cmdInterface.getAcctID();
		try
		{
			acct = (Account) AccountSetAccess.dictionary().obtain(new Integer(acctID));
		} catch (ItemNotFoundUosException e) 
		{
			cmdInterface.sendMessage("Account number " + acctID + " not found.");
			return;
		}
		Printer.printBalance(acct.number(), acct.balance(), date);
	}
}