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 jsf-api Show documentation
This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
There is a newer version: 2.2.20
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

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);
}