001 // Copyright 2004, 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; 016 017 import java.util.Map; 018 019 import org.apache.hivemind.util.Defense; 020 import org.apache.tapestry.util.QueryParameterMap; 021 022 /** 023 * Implementation of {@link org.apache.tapestry.engine.ServiceEncoding}, which adds the ability to 024 * determine when the encoding has been modified. 025 * 026 * @author Howard M. Lewis Ship 027 * @since 4.0 028 */ 029 public class ServiceEncodingImpl implements ServiceEncoding 030 { 031 private String _servletPath; 032 033 /** 034 * Map of query parameter values; key is string name, value is either a string, an array of 035 * strings, or null. Could have done this with subclassing rather than delegation. 036 */ 037 038 private final QueryParameterMap _parameters; 039 040 private boolean _modified; 041 042 public boolean isModified() 043 { 044 return _modified; 045 } 046 047 public void resetModified() 048 { 049 _modified = false; 050 } 051 052 /** 053 * Creates a new instance with a new map of parameters. 054 */ 055 056 public ServiceEncodingImpl(String servletPath) 057 { 058 this(servletPath, new QueryParameterMap()); 059 } 060 061 public ServiceEncodingImpl(String servletPath, Map parametersMap) 062 { 063 this(servletPath, new QueryParameterMap(parametersMap)); 064 } 065 066 public ServiceEncodingImpl(String servletPath, QueryParameterMap parameters) 067 { 068 Defense.notNull(servletPath, "servletPath"); 069 Defense.notNull(parameters, "parameters"); 070 071 _servletPath = servletPath; 072 073 _parameters = parameters; 074 } 075 076 public String getParameterValue(String name) 077 { 078 return _parameters.getParameterValue(name); 079 } 080 081 public String[] getParameterValues(String name) 082 { 083 return _parameters.getParameterValues(name); 084 } 085 086 public void setServletPath(String servletPath) 087 { 088 Defense.notNull(servletPath, "servletPath"); 089 090 _servletPath = servletPath; 091 _modified = true; 092 } 093 094 public void setParameterValue(String name, String value) 095 { 096 _parameters.setParameterValue(name, value); 097 098 _modified = true; 099 } 100 101 public void setParameterValues(String name, String[] values) 102 { 103 _parameters.setParameterValues(name, values); 104 105 _modified = true; 106 } 107 108 public String getServletPath() 109 { 110 return _servletPath; 111 } 112 113 public String[] getParameterNames() 114 { 115 return _parameters.getParameterNames(); 116 } 117 118 }