com.sun.faces.facelets.tag.ui.InsertHandler Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of jakarta.faces Show documentation
EE4J Compatible Implementation for Jakarta Faces API
There is a newer version: 4.1.1
/*
 * Copyright (c) 1997, 2020 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 com.sun.faces.facelets.tag.ui;

import java.io.IOException;

import com.sun.faces.facelets.FaceletContextImplBase;
import com.sun.faces.facelets.TemplateClient;
import com.sun.faces.facelets.tag.TagHandlerImpl;

import jakarta.faces.component.UIComponent;
import jakarta.faces.context.FacesContext;
import jakarta.faces.view.facelets.FaceletContext;
import jakarta.faces.view.facelets.TagAttribute;
import jakarta.faces.view.facelets.TagConfig;

/**
 * @author Jacob Hookom
 */
public final class InsertHandler extends TagHandlerImpl implements TemplateClient {

    private final String name;

    /**
     * @param config
     */
    public InsertHandler(TagConfig config) {
        super(config);
        TagAttribute attr = getAttribute("name");
        if (attr != null) {
            if (!attr.isLiteral()) {
                FacesContext context = FacesContext.getCurrentInstance();
                FaceletContext ctx = (FaceletContext) context.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);
                name = (String) attr.getValueExpression(ctx, String.class).getValue(ctx);
            } else {
                name = attr.getValue();
            }
        } else {
            name = null;
        }
    }

    /*
     * (non-Javadoc)
     *
     * @see com.sun.facelets.FaceletHandler#apply(com.sun.facelets.FaceletContext, jakarta.faces.component.UIComponent)
     */
    @Override
    public void apply(FaceletContext ctxObj, UIComponent parent) throws IOException {
        FaceletContextImplBase ctx = (FaceletContextImplBase) ctxObj;

        ctx.extendClient(this);
        boolean found = false;
        try {
            found = ctx.includeDefinition(parent, name);
        } finally {
            ctx.popClient(this);
        }
        if (!found) {
            nextHandler.apply(ctx, parent);
        }
    }

    @Override
    public boolean apply(FaceletContext ctx, UIComponent parent, String name) throws IOException {
        if (this.name != null && this.name.equals(name)) {
            nextHandler.apply(ctx, parent);
            return true;
        }
        return false;
    }
}