com.sun.faces.config.processor.ComponentConfigProcessor Maven / Gradle / Ivy

Go to download
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
The newest version!
/*
 * 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.config.processor;

import static java.text.MessageFormat.format;
import static java.util.logging.Level.FINE;

import java.text.MessageFormat;
import java.util.logging.Logger;

import javax.xml.xpath.XPathExpressionException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import com.sun.faces.config.Verifier;
import com.sun.faces.config.manager.documents.DocumentInfo;
import com.sun.faces.util.FacesLogger;

import jakarta.faces.application.Application;
import jakarta.faces.component.FacesComponent;
import jakarta.faces.component.UIComponent;
import jakarta.faces.context.FacesContext;
import jakarta.servlet.ServletContext;

/**
 * 
 * This ConfigProcessor handles all elements defined under /faces-config/component.
 * 
 */
public class ComponentConfigProcessor extends AbstractConfigProcessor {

    private static final Logger LOGGER = FacesLogger.CONFIG.getLogger();

    /**
     * 
     * /faces-config/component
     * 
     */
    private static final String COMPONENT = "component";

    /**
     * 
     * /faces-config/component/component-type
     * 
     */
    private static final String COMPONENT_TYPE = "component-type";

    /**
     * 
     * /faces-config/component/component-class
     * 
     */
    private static final String COMPONENT_CLASS = "component-class";

    // -------------------------------------------- Methods from ConfigProcessor

    @Override
    public void process(ServletContext sc, FacesContext facesContext, DocumentInfo[] documentInfos) throws Exception {

        // Process annotated components first as components configured
        // via config files take precedence
        processAnnotations(facesContext, FacesComponent.class);

        for (DocumentInfo documentInfo : documentInfos) {
            if (LOGGER.isLoggable(FINE)) {
                LOGGER.log(FINE, format("Processing component elements for document: ''{0}''", documentInfo.getSourceURI()));
            }

            Document document = documentInfo.getDocument();
            String namespace = document.getDocumentElement().getNamespaceURI();
            NodeList components = document.getDocumentElement().getElementsByTagNameNS(namespace, COMPONENT);
            if (components != null && components.getLength() > 0) {
                addComponents(components, namespace);
            }
        }

    }

    // --------------------------------------------------------- Private Methods

    private void addComponents(NodeList components, String namespace) throws XPathExpressionException {
        Application app = getApplication();
        Verifier verifier = Verifier.getCurrentInstance();
        for (int i = 0, size = components.getLength(); i < size; i++) {
            Node componentNode = components.item(i);
            NodeList children = ((Element) componentNode).getElementsByTagNameNS(namespace, "*");
            String componentType = null;
            String componentClass = null;
            for (int c = 0, csize = children.getLength(); c < csize; c++) {
                Node n = children.item(c);
                switch (n.getLocalName()) {
                case COMPONENT_TYPE:
                    componentType = getNodeText(n);
                    break;
                case COMPONENT_CLASS:
                    componentClass = getNodeText(n);
                    break;
                }
            }

            if (componentType != null && componentClass != null) {
                if (LOGGER.isLoggable(FINE)) {
                    LOGGER.log(FINE, MessageFormat.format("Calling Application.addComponent({0},{1})", componentType, componentClass));
                }
                if (verifier != null) {
                    verifier.validateObject(Verifier.ObjectType.COMPONENT, componentClass, UIComponent.class);
                }
                app.addComponent(componentType, componentClass);
            }
        }
    }

}