javax.faces.component.visit.VisitCallback Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jboss-jsf-api_2.3_spec Show documentation

JSR-000372: JavaServer(TM) Faces 2.3 API

There is a newer version: 3.1.0.SP02

Show newest version

/*
 * Copyright (c) 1997, 2018 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 javax.faces.component.visit;

import javax.faces.component.UIComponent;

/**
 *
 * A simple callback interface that enables 
 * taking action on a specific UIComponent (either facet or child) during 
 * a component tree visit.
 * 
 * @see UIComponent#visitTree UIComponent.visitTree()
 *
 * @since 2.0
 */
public interface VisitCallback {
    
    /**
     * This method is called during component tree visits by 
     * {@link VisitContext#invokeVisitCallback VisitContext.invokeVisitCallback()} 
     * to visit the specified component.  At the point in time when this 
     * method is called, the argument {@code target} is guaranteed
     * to be in the proper state with respect to its ancestors in the
     * View.
     *
     * @param context the {@link VisitContext} for this tree visit.
     *
     * @param target the {@link UIComponent} to visit
     *
     * @return a {@link VisitResult} that indicates whether to continue
     *   visiting the component's subtree, skip visiting the component's
     *   subtree or end the visit.
     */
    public VisitResult visit(VisitContext context, UIComponent target);
}