/*
* #!
* Ontopia TopicMapPreferences
* #-
* Copyright (C) 2001 - 2013 The Ontopia Project
* #-
* 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 net.ontopia.topicmaps.utils.tmprefs;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
public class TopicMapPreferencesServletFilter implements Filter {
private static final ThreadLocal<HttpServletRequest> requests = new ThreadLocal<HttpServletRequest>();
@Override
public void init(FilterConfig filterConfig) throws ServletException {
// no-op
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
if (request instanceof HttpServletRequest) {
requests.set((HttpServletRequest) request);
}
chain.doFilter(request, response);
requests.remove();
}
@Override
public void destroy() {
requests.remove();
}
public static HttpServletRequest getRequest() {
return requests.get();
}
}