Java tutorial
/* * Copyright 2003,2004 The Apache Software Foundation. * * 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.apache.struts.chain.servlet; import javax.servlet.http.HttpServletRequest; import org.apache.commons.chain.Context; import org.apache.commons.chain.web.servlet.ServletWebContext; import org.apache.struts.Globals; import org.apache.struts.chain.AbstractSelectModule; import org.apache.struts.chain.Constants; /** * <p>Cache the <code>ModuleConfig</code> and <code>MessageResources</code> * instances for the sub-application module to be used for processing * this request.</p> * * @author Craig R. McClanahan * @version $Rev: 54933 $ $Date: 2004-10-16 18:04:52 +0100 (Sat, 16 Oct 2004) $ */ public class SelectModule extends AbstractSelectModule { // ------------------------------------------------------- Protected Methods protected String getPrefix(Context context) { // Identify the URI from which we will match a module prefix ServletWebContext swcontext = (ServletWebContext) context; HttpServletRequest request = swcontext.getRequest(); String uri = (String) request.getAttribute(Constants.INCLUDE_SERVLET_PATH); if (uri == null) { uri = request.getServletPath(); } if (uri == null) { throw new IllegalArgumentException("No path information in request"); } // Identify the module prefix for the current module String prefix = ""; // Initialize to default prefix String prefixes[] = (String[]) swcontext.getApplicationScope().get(Globals.MODULE_PREFIXES_KEY); int lastSlash = 0; while (prefix.equals("") && ((lastSlash = uri.lastIndexOf("/")) > 0)) { uri = uri.substring(0, lastSlash); for (int i = 0; i < prefixes.length; i++) { if (uri.equals(prefixes[i])) { prefix = prefixes[i]; break; } } } return (prefix); } }