001/* 002 * Copyright (c) 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 * Florent Guillaume 011 */ 012package org.nuxeo.theme.html.servlets; 013 014import java.io.InputStream; 015import java.net.MalformedURLException; 016import java.net.URL; 017 018import javax.servlet.ServletContext; 019import javax.servlet.ServletContextEvent; 020import javax.servlet.ServletContextListener; 021 022import org.nuxeo.theme.ResourceResolver; 023 024/** 025 * Resolver for resources that checks the servlet context first. 026 * 027 * @since 5.5 028 */ 029public class ServletResourceResolver extends ResourceResolver implements ServletContextListener { 030 031 protected ServletContext servletContext; 032 033 @Override 034 public URL getResource(String path) { 035 try { 036 URL url = servletContext.getResource("/" + path); 037 if (url != null) { 038 return url; 039 } 040 } catch (MalformedURLException e) { 041 // continue 042 } 043 return super.getResource(path); 044 } 045 046 @Override 047 public InputStream getResourceAsStream(String path) { 048 InputStream is = servletContext.getResourceAsStream("/" + path); 049 if (is != null) { 050 return is; 051 } 052 return super.getResourceAsStream(path); 053 } 054 055 @Override 056 public void contextInitialized(ServletContextEvent sce) { 057 servletContext = sce.getServletContext(); 058 ResourceResolver.setInstance(this); 059 } 060 061 @Override 062 public void contextDestroyed(ServletContextEvent sce) { 063 servletContext = null; 064 ResourceResolver.setInstance(null); 065 } 066 067}