/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* 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 freemarker.ext.jsp;
import freemarker.log.Logger;
import freemarker.template.TemplateModelException;
import javax.servlet.jsp.el.ExpressionEvaluator;
import javax.servlet.jsp.el.VariableResolver;
import javax.servlet.jsp.el.ELException;
import javax.servlet.jsp.JspFactory;
import javax.servlet.jsp.PageContext;
import javax.servlet.ServletException;
import java.io.IOException;
/**
* Don't use this class; it's only public to work around Google App Engine Java
* compliance issues. FreeMarker developers only: treat this class as package-visible.
*
* Implementation of PageContext that contains JSP 2.0 specific methods.
*/
public class _FreeMarkerPageContext2 extends FreeMarkerPageContext {
private static final Logger logger = Logger.getLogger("freemarker.jsp");
static {
if(JspFactory.getDefaultFactory() == null) {
JspFactory.setDefaultFactory(new FreeMarkerJspFactory2());
}
logger.debug("Using JspFactory implementation class " +
JspFactory.getDefaultFactory().getClass().getName());
}
public _FreeMarkerPageContext2() throws TemplateModelException {
super();
}
/**
* Attempts to locate and manufacture an expression evaulator instance. For this
* to work you <b>must</b> have the Apache Commons-EL package in the classpath. If
* Commons-EL is not available, this method will throw an UnsupportedOperationException.
*/
public ExpressionEvaluator getExpressionEvaluator() {
try {
Class type = Thread.currentThread().getContextClassLoader().loadClass
("org.apache.commons.el.ExpressionEvaluatorImpl");
return (ExpressionEvaluator) type.newInstance();
}
catch (Exception e) {
throw new UnsupportedOperationException("In order for the getExpressionEvaluator() " +
"method to work, you must have downloaded the apache commons-el jar and " +
"made it available in the classpath.");
}
}
/**
* Returns a variable resolver that will resolve variables by searching through
* the page scope, request scope, session scope and application scope for an
* attribute with a matching name.
*/
public VariableResolver getVariableResolver() {
final PageContext ctx = this;
return new VariableResolver() {
public Object resolveVariable(String name) throws ELException {
return ctx.findAttribute(name);
}
};
}
/**
* Includes the specified path. The flush argument is ignored!
*/
public void include(String path, boolean flush) throws IOException, ServletException {
super.include(path);
}
}