confirm.java

Enjoy Web Dev With Tapestry 一书的源代码

package com.ttdev.shop;

import java.util.*;

import org.apache.tapestry.*;
import org.apache.tapestry.annotations.*;
import org.apache.tapestry.callback.*;
import org.apache.tapestry.event.*;
import org.apache.tapestry.html.*;

public abstract class Confirm extends BasePage implements PageValidateListener {
	@InjectState("cart")
	public abstract List getCart();
	
	@InjectState("user")
	public abstract User getUser();

	@InjectStateFlag("user")
	public abstract boolean getUserExists();

	@InjectPage("Login")
	public abstract Login getLoginPage();

	public void pageValidate(PageEvent event) {
		if (!getUserExists()) {
			Login login = getLoginPage();
			login.setNextPage(new PageCallback("Confirm"));
			throw new PageRedirectException(login);
		}
	}
	public double getTotal() {
		double total = 0;
		for (Iterator iter = getCart().iterator(); iter.hasNext();) {
			String productId = (String) iter.next();
			total += Catalog.getGlobalCatalog().lookup(productId).getPrice();
		}
		return total;
	}
	public String getCreditCardNo() {
		return getUser().getCreditCardNo();
	}
	public String onConfirm() {
		//place the order.
		System.out.println("Placing the order...");
		return "Home";
	}
	public String onContinueShopping() {
		return "Home";
	}
}