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EE4J Compatible Implementation for Jakarta Faces API

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/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 * Copyright 2005-2007 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package jakarta.faces.view.facelets;

import java.io.IOException;

import jakarta.faces.component.UIComponent;

/**
 * 
 * A FaceletHandler that is derived of 1 or more, inner FaceletHandlers. This class would be found if the next
 * FaceletHandler is structually, a body with multiple child elements as defined in XML. This class enables the Facelet
 * runtime to traverse the tree of {@link FaceletHandler} instances built by the Facelets compiler.
 * 
 *
 */
public final class CompositeFaceletHandler implements FaceletHandler {

    private final FaceletHandler[] children;
    private final int len;

    public CompositeFaceletHandler(FaceletHandler[] children) {
        this.children = children;
        len = children.length;
    }

    /**
     * 
     * Calls apply on any child handlers.
     * 
     *
     * @param ctx the FaceletContext for this view execution
     *
     * @param parent the parent UIComponent of the component represented by this element instance.
     * @since 2.0
     */
    @Override
    public void apply(FaceletContext ctx, UIComponent parent) throws IOException {
        for (int i = 0; i < len; i++) {
            children[i].apply(ctx, parent);
        }
    }

    /**
     * 
     * Returns the array of child handlers contained by this handler.
     * 
     *
     * @return Returns the array of child handlers contained by this handler.
     */
    public FaceletHandler[] getHandlers() {
        return children;
    }
}