subscriberbean.java

看了《 使用JSF 构建数据库驱动的应用程序》 一文后

package jsfdb.view;

import jsfdb.model.Subscriber;
import jsfdb.model.ModelUtils;
import jsfdb.model.err.ProfileException;
import jsfdb.model.err.SubscribeException;
import jsfdb.model.err.UnsubscribeException;

import javax.faces.component.UIComponent;
import javax.faces.component.EditableValueHolder;
import javax.faces.context.FacesContext;

public class SubscriberBean extends Subscriber {
    public final static String INVALID_EMAIL_ID
        = "jsfdb.view.SubscriberBean.INVALID_EMAIL";
    public final static String SELECT_NEWSLETTER_ID
        = "jsfdb.view.SubscriberBean.SELECT_NEWSLETTER";
    private transient boolean loggedIn = false;

    public boolean isLoggedIn() {
        return loggedIn;
    }

    public void setLoggedIn(boolean loggedIn) {
        this.loggedIn = loggedIn;
    }

    public void emailValidator(FacesContext context,
            UIComponent comp, Object value) {
        String email = (String) value;
        if (email.indexOf("@") == -1) {
            String compId = comp.getClientId(context);
            ViewUtils.addErrorMessage(
                context, compId, INVALID_EMAIL_ID);
            ((EditableValueHolder) comp).setValid(false);
        }
    }

    public String subscribeAction() {
        if (countNewsletters() == 0) {
            ViewUtils.addErrorMessage(
                FacesContext.getCurrentInstance(),
                null, SELECT_NEWSLETTER_ID);
            return null;
        }
        try {
            ModelUtils.getSubscriberDAO().insert(this);
            setLoggedIn(true);
            return "subscribed";
        } catch (SubscribeException x) {
            ViewUtils.addExceptionMessage(x);
            return null;
        }
    }

    public String profileAction() {
        if (!loggedIn)
            return "login";
        if (countNewsletters() == 0) {
            ViewUtils.addErrorMessage(
                FacesContext.getCurrentInstance(),
                null, SELECT_NEWSLETTER_ID);
            return null;
        }
        try {
            ModelUtils.getSubscriberDAO().update(this);
            return null;
        } catch (ProfileException x) {
            ViewUtils.addExceptionMessage(x);
            return null;
        }
    }

    public String unsubscribeAction() {
        if (!loggedIn)
            return "login";
        try {
            ModelUtils.getSubscriberDAO().delete(this);
            return "unsubscribed";
        } catch (UnsubscribeException x) {
            ViewUtils.addExceptionMessage(x);
            return null;
        }
    }

    public String cancelAction() {
        if (!loggedIn)
            return "login";
        else
            return "cancel";
    }

    public int getDailyConst() {
        return TYPE_DAILY;
    }

    public int getWeeklyConst() {
        return TYPE_WEEKLY;
    }

    public int getMonthlyConst() {
        return TYPE_MONTHLY;
    }

}