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1 /* 2 * Angkor Web Framework 3 * 4 * Distributable under LGPL license. 5 * See terms of license at gnu.org. 6 */ 7 8 package com.tirsen.angkor.jsp; 9 10 import com.tirsen.angkor.Debug; 11 import org.apache.log4j.Category; 12 13 import javax.servlet.jsp.JspException; 14 import javax.servlet.jsp.tagext.TagSupport; 15 16 /*** 17 * Implementation of a tag that includes named components into a jsp-page, the components are 18 * fetched from the application instance created by the ApplicationFilter which must be mapped 19 * to all requests to jsp-pages using this tag. 20 * Also needs to be behind a PrerenderFilter now. TODO update this doc. 21 * 22 * <!-- $Id: ComponentTag.java,v 1.3 2002/10/09 21:37:37 tirsen Exp $ --> 23 * 24 * @author $Author: tirsen $ 25 * @version $Revision: 1.3 $ 26 */ 27 public class ComponentTag extends TagSupport 28 { 29 private static final Category logger = Category.getInstance(Debug.LOGGER_NAME); 30 31 private String name; 32 33 public void setName(String name) 34 { 35 this.name = name; 36 } 37 38 public int doStartTag() throws JspException 39 { 40 return EVAL_BODY_INCLUDE; 41 } 42 43 public int doEndTag() throws JspException 44 { 45 PrerenderedComponentsRegistry registry = (PrerenderedComponentsRegistry) 46 pageContext.findAttribute(PrerenderFilter.REGISTRY_NAME); 47 48 /* 49 if(registry == null) registry = (PrerenderedComponentsRegistry) 50 pageContext.getRequest().getAttribute(PrerenderFilter.REGISTRY_NAME); 51 */ 52 53 if (registry == null) 54 throw new JspException("No components prerendered. " + 55 "PrerenderFilter needs to filter this request."); 56 57 try 58 { 59 registry.render(name, pageContext.getOut()); 60 } 61 catch (Exception e) 62 { 63 logger.error("error rendering prerendered view", e); 64 throw new JspException(e); 65 } 66 return super.doEndTag(); 67 } 68 }

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