/*
* Copyright 2011 <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
*
* 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.ocpsoft.rewrite.servlet.impl;
import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;
import org.ocpsoft.rewrite.servlet.DispatcherType;
import org.ocpsoft.rewrite.servlet.spi.DispatcherTypeProvider;
/**
* Implementation of {@link DispatcherTypeProvider} for Servlet 2.5 which uses special request attributes to detect the
* dispatcher type.
*
* @author Christian Kaltepoth
*/
public class Servlet25DispatcherTypeProvider implements DispatcherTypeProvider
{
@Override
public int priority()
{
return 20;
}
@Override
public DispatcherType getDispatcherType(ServletRequest request, ServletContext context)
{
if (request.getAttribute("javax.servlet.forward.request_uri") != null) {
return DispatcherType.FORWARD;
}
if (request.getAttribute("javax.servlet.include.request_uri") != null) {
return DispatcherType.INCLUDE;
}
Throwable throwable = (Throwable) request.getAttribute("javax.servlet.error.exception");
if (throwable != null) {
return DispatcherType.ERROR;
}
return DispatcherType.REQUEST;
}
}