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/*
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* Angkor Web Framework
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*
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* Distributable under LGPL license.
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* See terms of license at gnu.org.
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*/
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package com.tirsen.angkor.jsp;
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import com.tirsen.angkor.Debug;
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import org.apache.log4j.Category;
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import javax.servlet.jsp.JspException;
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import javax.servlet.jsp.tagext.TagSupport;
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/**
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* Implementation of a tag that includes named components into a jsp-page, the components are
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* fetched from the application instance created by the ApplicationFilter which must be mapped
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* to all requests to jsp-pages using this tag.
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* Also needs to be behind a PrerenderFilter now. TODO update this doc.
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*
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* <!-- $Id: ComponentTag.java,v 1.3 2002/10/09 21:37:37 tirsen Exp $ -->
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*
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* @author $Author: tirsen $
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* @version $Revision: 1.3 $
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*/
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public class ComponentTag extends TagSupport
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{
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private static final Category logger = Category.getInstance(Debug.LOGGER_NAME);
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private String name;
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public void setName(String name)
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{
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this.name = name;
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}
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public int doStartTag() throws JspException
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{
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return EVAL_BODY_INCLUDE;
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}
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public int doEndTag() throws JspException
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{
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PrerenderedComponentsRegistry registry = (PrerenderedComponentsRegistry)
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pageContext.findAttribute(PrerenderFilter.REGISTRY_NAME);
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/*
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if(registry == null) registry = (PrerenderedComponentsRegistry)
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pageContext.getRequest().getAttribute(PrerenderFilter.REGISTRY_NAME);
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*/
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if (registry == null)
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throw new JspException("No components prerendered. " +
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"PrerenderFilter needs to filter this request.");
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try
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{
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registry.render(name, pageContext.getOut());
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}
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catch (Exception e)
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{
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logger.error("error rendering prerendered view", e);
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throw new JspException(e);
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}
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return super.doEndTag();
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}
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}
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