001/* 002 * Copyright (c) 2006-2011 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the Eclipse Public License v1.0 006 * which accompanies this distribution, and is available at 007 * http://www.eclipse.org/legal/epl-v10.html 008 * 009 * Contributors: 010 * bstefanescu 011 */ 012package org.nuxeo.ecm.webengine.jaxrs; 013 014import java.io.IOException; 015 016import javax.servlet.Filter; 017import javax.servlet.FilterChain; 018import javax.servlet.ServletException; 019import javax.servlet.ServletRequest; 020import javax.servlet.ServletResponse; 021import javax.servlet.http.HttpServletRequest; 022import javax.servlet.http.HttpServletResponse; 023 024/** 025 * Simple abstract filter that provides filter activation logic. 026 * 027 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a> 028 */ 029public abstract class HttpFilter implements Filter { 030 031 public static final boolean getBoolean(ServletRequest request, String key) { 032 return Boolean.parseBoolean((String) request.getAttribute(key)); 033 } 034 035 @Override 036 public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, 037 ServletException { 038 if (request instanceof HttpServletRequest == false) { 039 chain.doFilter(request, response); 040 return; 041 } 042 run((HttpServletRequest) request, (HttpServletResponse) response, chain); 043 } 044 045 protected abstract void run(HttpServletRequest request, HttpServletResponse response, FilterChain chain) 046 throws IOException, ServletException; 047 048}