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/*
 * Copyright (c) 1997, 2021 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package jakarta.faces.view.facelets;

import jakarta.faces.view.BehaviorHolderAttachedObjectHandler;

/**
 * 

* The {@link FaceletHandler} that corresponds to attached objects that represent an instance of * {@link jakarta.faces.component.behavior.ClientBehavior} that must be added to the parent component, which must * implement {@link jakarta.faces.component.behavior.ClientBehaviorHolder}, with a call to * {@link jakarta.faces.component.behavior.ClientBehaviorHolder#addClientBehavior}. The current specification defines * one Facelet element for this sort of attached object, <f:ajax>. *

*/ public class BehaviorHandler extends FaceletsAttachedObjectHandler implements BehaviorHolderAttachedObjectHandler { private final TagAttribute event; private String behaviorId; private TagHandlerDelegate helper; /** * Constructs the handler using the Id from the config. * * @param config config instance to get the behavior Id from. */ public BehaviorHandler(BehaviorConfig config) { super(config); behaviorId = config.getBehaviorId(); event = getAttribute("event"); if (event != null && !event.isLiteral()) { throw new TagException(tag, "The 'event' attribute for behavior tag must be a literal"); } } @Override public String getEventName() { if (getEvent() != null) { return getEvent().getValue(); } return null; } @Override protected TagHandlerDelegate getTagHandlerDelegate() { if (helper == null) { helper = delegateFactory.createBehaviorHandlerDelegate(this); } return helper; } /** * Returns the behavior Id obtained from the passed-in config. * @return the behavior Id */ public String getBehaviorId() { return behaviorId; } /** * Returns the event that is set as the "event" attribute on the behavior tag. * * @return the event tag attribute */ public TagAttribute getEvent() { return event; } }




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