001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.xbean.spring.context.impl;
018
019 import java.lang.reflect.Constructor;
020 import java.lang.reflect.Method;
021 import java.util.ArrayList;
022 import java.util.Collections;
023 import java.util.Properties;
024 import java.util.StringTokenizer;
025
026 /**
027 * A helper class which understands how to map an XML namespaced element to
028 * Spring bean configurations
029 *
030 * @author James Strachan
031 * @version $Id$
032 * @since 2.0
033 */
034 public class MappingMetaData {
035 private Properties properties;
036 private String packageName;
037
038 /**
039 * Creates an empty MappingMetaData for the specified Java package.
040 * @param packageName the Java package to map
041 */
042 public MappingMetaData(String packageName) {
043 this.packageName = packageName;
044 this.properties = new Properties();
045 }
046
047 /**
048 * Creates MappingMetaData using the specified properties which contan the package name.
049 * @param properties
050 */
051 public MappingMetaData(Properties properties) {
052 this.properties = properties;
053 }
054
055 /**
056 * Returns the Java class name for the given XML element name
057 */
058 public String getClassName(String localName) {
059 String className = properties.getProperty(localName);
060 if (className == null && packageName != null) {
061 if (packageName.length() > 0) {
062 className = packageName + "." + localName;
063 }
064 else {
065 className = localName;
066 }
067 }
068 return className;
069 }
070
071 /**
072 * Returns the property name for the given element and attribute name
073 *
074 * @param elementName the XML local name of the element
075 * @param attributeName the XML local name of the attribute
076 * @return the property name to use or null if the attribute is not a valid property
077 */
078 public String getPropertyName(String elementName, String attributeName) {
079 return properties.getProperty(elementName + ".alias." + attributeName, attributeName);
080 }
081
082 /**
083 * Returns a valid property name if the childElementName maps to a nested list property
084 *
085 * @param elementName the owner element
086 * @param childElementName is the child element name which maps to the nested list property
087 * @return the property name if available or null if it is not applicable
088 */
089 public String getNestedListProperty(String elementName, String childElementName) {
090 return properties.getProperty(elementName + ".list." + childElementName);
091 }
092
093 /**
094 * Returns a valid property name if the childElementName maps to a nested bean property
095 *
096 * @param elementName the owner element
097 * @param childElementName is the child element name which maps to the nested bean property
098 * @return the property name if available or null if it is not applicable
099 */
100 public String getNestedProperty(String elementName, String childElementName) {
101 return properties.getProperty(elementName + ".alias." + childElementName);
102 }
103
104 public boolean isDefaultConstructor(Constructor constructor) {
105 String property = properties.getProperty(constructorToPropertyName(constructor) + ".default");
106 if (property != null) {
107 return Boolean.valueOf(property).booleanValue();
108 }
109 return false;
110 }
111
112 public boolean isDefaultFactoryMethod(Class beanClass, Method factoryMethod) {
113 String property = properties.getProperty(methodToPropertyName(beanClass, factoryMethod) + ".default");
114 if (property != null) {
115 return Boolean.valueOf(property).booleanValue();
116 }
117 return false;
118 }
119
120 public String[] getParameterNames(Constructor constructor) {
121 String property = properties.getProperty(constructorToPropertyName(constructor) + ".parameterNames");
122 if (property != null) {
123 ArrayList names = Collections.list(new StringTokenizer(property, ", "));
124 return (String[]) names.toArray(new String[0]);
125 }
126 return null;
127 }
128
129 public String[] getParameterNames(Class beanClass, Method factoryMethod) {
130 String property = properties.getProperty(methodToPropertyName(beanClass, factoryMethod) + ".parameterNames");
131 if (property != null) {
132 ArrayList names = Collections.list(new StringTokenizer(property, ", "));
133 return (String[]) names.toArray(new String[0]);
134 }
135 return null;
136 }
137
138 public static String constructorToPropertyName(Constructor constructor) {
139 StringBuffer buf = new StringBuffer();
140 buf.append(constructor.getName()).append("(");
141 Class[] parameterTypes = constructor.getParameterTypes();
142 for (int i = 0; i < parameterTypes.length; i++) {
143 Class parameterType = parameterTypes[i];
144 buf.append(parameterType.getName());
145 if (i < parameterTypes.length - 1) {
146 buf.append(",");
147 }
148 }
149 buf.append(")");
150 return buf.toString();
151 }
152
153 public static String methodToPropertyName(Class beanClass, Method method) {
154 StringBuffer buf = new StringBuffer();
155 buf.append(beanClass.getName()).append(".");
156 buf.append(method.getName()).append("(");
157 Class[] parameterTypes = method.getParameterTypes();
158 for (int i = 0; i < parameterTypes.length; i++) {
159 Class parameterType = parameterTypes[i];
160 buf.append(parameterType.getName());
161 if (i < parameterTypes.length - 1) {
162 buf.append(",");
163 }
164 }
165 buf.append(")");
166 return buf.toString();
167 }
168
169 public String getInitMethodName(String elementName) {
170 return properties.getProperty(elementName + ".initMethod");
171 }
172
173 public String getDestroyMethodName(String elementName) {
174 return properties.getProperty(elementName + ".destroyMethod");
175 }
176
177 public String getFactoryMethodName(String elementName) {
178 return properties.getProperty(elementName + ".factoryMethod");
179 }
180
181 public String getContentProperty(String elementName) {
182 return properties.getProperty(elementName + ".contentProperty");
183 }
184
185 public String getMapEntryName(String elementName, String property) {
186 return properties.getProperty(elementName + "." + property + ".map.entryName");
187 }
188
189 public String getMapKeyName(String elementName, String property) {
190 return properties.getProperty(elementName + "." + property + ".map.keyName");
191 }
192
193 public boolean isFlatMap(String elementName, String property) {
194 return properties.getProperty(elementName + "." + property + ".map.flat") != null;
195 }
196
197 public String getMapDupsMode(String elementName, String property) {
198 return properties.getProperty(elementName + "." + property + ".map.dups");
199 }
200
201 public String getMapDefaultKey(String elementName, String property) {
202 return properties.getProperty(elementName + "." + property + ".map.defaultKey");
203 }
204
205 public String getFlatCollectionProperty(String elementName, String property)
206 {
207 return properties.getProperty(elementName + "." + property + ".flatCollection");
208 }
209
210 public boolean isFlatProperty(String elementName, String property) {
211 return properties.getProperty(elementName + "." + property + ".flat") != null;
212 }
213
214 public String getPropertyEditor(String elementName, String property)
215 {
216 return properties.getProperty(elementName + "." + property + ".propertyEditor");
217 }
218
219 }