/*
* $Id: JspTemplateEngine.java 471756 2006-11-06 15:01:43Z husted $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.struts2.components.template;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.PageContext;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.components.Include;
import org.apache.struts2.components.UIBean;
import com.opensymphony.xwork2.util.ValueStack;
/**
* JSP based template engine.
*/
public class JspTemplateEngine extends BaseTemplateEngine {
private static final Log LOG = LogFactory.getLog(JspTemplateEngine.class);
public void renderTemplate(TemplateRenderingContext templateContext) throws Exception {
Template template = templateContext.getTemplate();
if (LOG.isDebugEnabled()) {
LOG.debug("Trying to render template " + template + ", repeating through parents until we succeed");
}
UIBean tag = templateContext.getTag();
ValueStack stack = templateContext.getStack();
stack.push(tag);
PageContext pageContext = (PageContext) stack.getContext().get(ServletActionContext.PAGE_CONTEXT);
List templates = template.getPossibleTemplates(this);
Exception exception = null;
boolean success = false;
for (Iterator iterator = templates.iterator(); iterator.hasNext();) {
Template t = (Template) iterator.next();
try {
Include.include(getFinalTemplateName(t), pageContext.getOut(),
pageContext.getRequest(), (HttpServletResponse) pageContext.getResponse());
success = true;
break;
} catch (Exception e) {
if (exception == null) {
exception = e;
}
}
}
if (!success) {
LOG.error("Could not render JSP template " + templateContext.getTemplate());
if (exception != null) {
throw exception;
} else {
return;
}
}
stack.pop();
}
protected String getSuffix() {
return "jsp";
}
}