/*/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements.  See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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.apache.pluto.core;import java.net.MalformedURLException;import java.net.URL;import javax.servlet.ServletContext;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;public class DefaultApplicationIdResolver implements ApplicationIdResolver {    private static final Log LOG = LogFactory.getLog(DefaultApplicationIdResolver.class);    private static final String WEB_XML = "/WEB-INF/web.xml";	private static final String JNDI_PREFIX = "jndi:/";    public String resolveApplicationId(ServletContext context) {        try {            URL webXmlUrl = context.getResource(WEB_XML);            String path = webXmlUrl.toExternalForm();            path = path.substring(0, path.indexOf(WEB_XML));			int slash = path.lastIndexOf('/');			if ((slash < JNDI_PREFIX.length()) && path.startsWith(JNDI_PREFIX)) {				// Tomcat resources look like "jndi:/hostname/contextPath/WEB-INF/web.xml"				// where "/contextPath" is "" for the ROOT context.				// So if the last slash is the one in "jndi:/", the correct				// result is "" and not "/hostname"				path = "";			} else {				path = path.substring(slash);			}            int id = path.indexOf(".war");            if(id > 0) {                path = path.substring(0, id);            }            return path;        } catch (MalformedURLException e) {            LOG.warn("Error retrieving web.xml from ServletContext. Unable to derive contextPath.");            return null;        }    }    public int getAuthority() {        return DEFAULT;    }}