grouprenderer.java

一个比较好的jsf spring hibernate的例子

/*
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 * Copyright 1997-2007 Sun Microsystems, Inc. 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.html
 * or glassfish/bootstrap/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 glassfish/bootstrap/legal/LICENSE.txt.
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 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
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package renderkits.renderkit.xul;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

import java.io.IOException;
import java.util.Iterator;
import java.util.logging.Level;

/**
 * Arbitrary grouping "renderer" that simply renders its children
 * recursively in the <code>encodeEnd()</code> method.
 *
 * @version $Id: GroupRenderer.java,v 1.4 2007/04/27 22:00:39 ofung Exp $
 */
public class GroupRenderer extends BaseRenderer {

    //
    // Protected Constants
    //

    //
    // Class Variables
    //

    //
    // Instance Variables
    //

    // Attribute Instance Variables

    // Relationship Instance Variables

    //
    // Constructors and Initializers    
    //

    public GroupRenderer() {
        super();
    }

    //
    // Class methods
    //

    //
    // General Methods
    //

    //
    // Methods From Renderer
    //

    public boolean getRendersChildren() {
        return true;
    }


    public void encodeBegin(FacesContext context, UIComponent component)
          throws IOException {
        if (logger.isLoggable(Level.FINER)) {
            logger.log(Level.FINER, "Begin encoding component " +
                                    component.getId());
        }
        // suppress rendering if "rendered" property on the component is
        // false.
        if (!component.isRendered()) {
            if (logger.isLoggable(Level.FINE)) {
                logger.fine("End encoding component " +
                            component.getId() + " since " +
                            "rendered attribute is set to false ");
            }
            return;
        }

        String
              style = (String) component.getAttributes().get("style"),
              styleClass = (String) component.getAttributes().get("styleClass"),
              captionClass =
                    (String) component.getAttributes().get("captionClass"),
              captionLabel =
                    (String) component.getAttributes().get("captionLabel");
        ResponseWriter writer = context.getResponseWriter();

        writer.writeText("\n", null);
        writer.startElement("groupbox", component);
        writeIdAttributeIfNecessary(context, writer, component);
        if (styleClass != null) {
            writer.writeAttribute("class", styleClass, "styleClass");
        }
        if (style != null) {
            writer.writeAttribute("style", style, "style");
        }
        if (captionLabel != null) {
            writer.writeText("\n", null);
            writer.startElement("caption", component);
            writer.writeAttribute("label", captionLabel, "captionLabel");
            if (captionClass != null) {
                writer.writeAttribute("class", captionClass, "captionClass");
            }
            writer.endElement("caption");
        }
        writer.writeText("\n", null);
    }


    public void encodeChildren(FacesContext context, UIComponent component)
          throws IOException {
        if (logger.isLoggable(Level.FINER)) {
            logger.log(Level.FINER,
                       "Begin encoding children " + component.getId());
        }
        // suppress rendering if "rendered" property on the component is
        // false.
        if (!component.isRendered()) {
            if (logger.isLoggable(Level.FINE)) {
                logger.fine("End encoding component " +
                            component.getId() + " since " +
                            "rendered attribute is set to false ");
            }
            return;
        }

        // Render our children recursively
        Iterator kids = getChildren(component);
        while (kids.hasNext()) {
            encodeRecursive(context, (UIComponent) kids.next());
        }
        if (logger.isLoggable(Level.FINER)) {
            logger.log(Level.FINER,
                       "End encoding children " + component.getId());
        }

    }


    public void encodeEnd(FacesContext context, UIComponent component)
          throws IOException {
        if (context == null || component == null) {
            // PENDING - i18n
            throw new NullPointerException("'context' and/or 'component is null");
        }

        // suppress rendering if "rendered" property on the component is
        // false.
        if (!component.isRendered()) {
            if (logger.isLoggable(Level.FINE)) {
                logger.fine("End encoding component " +
                            component.getId() + " since " +
                            "rendered attribute is set to false ");
            }
            return;
        }

        ResponseWriter writer = context.getResponseWriter();
        writer.endElement("groupbox");
        writer.writeText("\n", null);

        if (logger.isLoggable(Level.FINER)) {
            logger.log(Level.FINER, "End encoding component " +
                                    component.getId());
        }

    }
}