001 // Copyright 2005 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 015 package org.apache.tapestry.engine.encoders; 016 017 import org.apache.tapestry.engine.ServiceEncoder; 018 import org.apache.tapestry.engine.ServiceEncoding; 019 import org.apache.tapestry.services.ServiceConstants; 020 021 /** 022 * Encodes the service name, typical output is "/page.svc" where "page" is a service name. This is 023 * useful for the home and restart services, for example. This encoder should be prioritized very 024 * low so that it doesn't prevent other encoders from doing their work. 025 * 026 * @author Howard M. Lewis Ship 027 * @since 4.0 028 */ 029 public class ServiceExtensionEncoder implements ServiceEncoder 030 { 031 private String _extension; 032 033 public void setExtension(String extension) 034 { 035 _extension = extension; 036 } 037 038 public void encode(ServiceEncoding encoding) 039 { 040 String service = encoding.getParameterValue(ServiceConstants.SERVICE); 041 042 // Can assume this is never null. 043 044 encoding.setServletPath("/" + service + "." + _extension); 045 encoding.setParameterValue(ServiceConstants.SERVICE, null); 046 } 047 048 public void decode(ServiceEncoding encoding) 049 { 050 String servletPath = encoding.getServletPath(); 051 052 int dotx = servletPath.lastIndexOf('.'); 053 054 String extension = servletPath.substring(dotx + 1); 055 056 if (!extension.equals(_extension)) 057 return; 058 059 // The first character should be a slash, then the service name, then the dot. 060 061 String service = servletPath.substring(1, dotx); 062 063 encoding.setParameterValue(ServiceConstants.SERVICE, service); 064 } 065 066 }