/*
* $Id: JspTemplateEngine.java 451544 2006-09-30 05:38:02Z mrdon $
*
* Copyright 2006 The Apache Software Foundation.
*
* 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.
*/
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";
}
}