de.jwic.renderer.jsp.JspRenderer.java Source code

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Here is the source code for de.jwic.renderer.jsp.JspRenderer.java

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/*
 * Copyright 2005 jWic group (http://www.jwic.de)
 * 
 * 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.
 *
 * de.jwic.renderer.jsp.JspRenderer
 * Created on 04.12.2005
 * $Id: JspRenderer.java,v 1.4 2009/10/30 07:59:20 lordsam Exp $
 */
package de.jwic.renderer.jsp;

import java.io.PrintWriter;

import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import de.jwic.base.Control;
import de.jwic.base.IControlContainer;
import de.jwic.base.IControlRenderer;
import de.jwic.base.RenderContext;
import de.jwic.renderer.util.ChildRenderer;
import de.jwic.renderer.util.JWicTools;

/**
 * Renders controls using a JSP page. The jsp pages must be stored in the
 * directory /WEB-INF/jwic/jsp. The filename is the templatename with a
 * ".jsp" extension.
 * 
 * @author Florian Lippisch
 * @version $Revision: 1.4 $
 */
public class JspRenderer implements IControlRenderer {

    protected final Log log = LogFactory.getLog(getClass());

    /* (non-Javadoc)
     * @see de.jwic.base.IControlRenderer#renderControl(de.jwic.base.Control, de.jwic.base.RenderContext)
     */
    public void renderControl(Control control, RenderContext context) {

        if (log.isDebugEnabled()) {
            log.debug("Rendering control '" + control.getControlID() + "' with template '"
                    + control.getTemplateName() + "'");
        }

        String ctrlDivID = "ctrl_" + control.getControlID();//.replace('.', '_');
        PrintWriter writer = context.getWriter();
        if (!control.isVisible()) {
            writer.print("<span id=\"" + ctrlDivID + "\">");
            writer.print("</span>");
            return;
        }

        HttpServletRequest request = context.getRequest();
        request.setAttribute("control", control);
        request.setAttribute("jwic",
                new JWicTools(control.getSessionContext().getLocale(), control.getSessionContext().getTimeZone()));
        if (control instanceof IControlContainer) {
            request.setAttribute("insert", new ChildRenderer((IControlContainer) control, context));
        }

        RequestDispatcher dispatcher = context.getRequest()
                .getRequestDispatcher("/WEB-INF/jwic/jsp/" + control.getTemplateName() + ".jsp");
        try {
            HttpServletResponseFacade res = new HttpServletResponseFacade(context.getResponse(),
                    context.getWriter());
            writer.print("<span><span id=\"" + ctrlDivID + "\">");
            dispatcher.include(context.getRequest(), res);
            writer.print("</span></span>");

        } catch (Exception e) {
            log.error("Error including jsp page", e);
            context.getWriter().write("Error rendering Control (" + e + ")");
        }

    }

}