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
018 package org.apache.commons.configuration.beanutils;
019
020 import java.util.ArrayList;
021 import java.util.Iterator;
022 import java.util.List;
023
024 import org.apache.commons.beanutils.DynaBean;
025 import org.apache.commons.beanutils.DynaClass;
026 import org.apache.commons.beanutils.DynaProperty;
027 import org.apache.commons.configuration.Configuration;
028 import org.apache.commons.logging.Log;
029 import org.apache.commons.logging.LogFactory;
030
031 /**
032 * The <tt>ConfigurationDynaClass</tt> dynamically determines properties for
033 * a {@code ConfigurationDynaBean} from a wrapped configuration-collection
034 * {@link org.apache.commons.configuration.Configuration} instance.
035 *
036 * @author <a href="mailto:ricardo.gladwell@btinternet.com">Ricardo Gladwell</a>
037 * @version $Id: ConfigurationDynaClass.java 1208764 2011-11-30 20:41:30Z oheger $
038 * @since 1.0-rc1
039 */
040 public class ConfigurationDynaClass implements DynaClass
041 {
042 /** The logger.*/
043 private static Log log = LogFactory.getLog(ConfigurationDynaClass.class);
044
045 /** Stores the associated configuration.*/
046 private Configuration configuration;
047
048 /**
049 * Construct an instance of a {@code ConfigurationDynaClass}
050 * wrapping the specified {@code Configuration} instance.
051 * @param configuration {@code Configuration} instance.
052 */
053 public ConfigurationDynaClass(Configuration configuration)
054 {
055 super();
056 if (log.isTraceEnabled())
057 {
058 log.trace("ConfigurationDynaClass(" + configuration + ")");
059 }
060 this.configuration = configuration;
061 }
062
063 public DynaProperty getDynaProperty(String name)
064 {
065 if (log.isTraceEnabled())
066 {
067 log.trace("getDynaProperty(" + name + ")");
068 }
069
070 if (name == null)
071 {
072 throw new IllegalArgumentException("Property name must not be null!");
073 }
074
075 Object value = configuration.getProperty(name);
076 if (value == null)
077 {
078 return null;
079 }
080 else
081 {
082 Class<?> type = value.getClass();
083
084 if (type == Byte.class)
085 {
086 type = Byte.TYPE;
087 }
088 if (type == Character.class)
089 {
090 type = Character.TYPE;
091 }
092 else if (type == Boolean.class)
093 {
094 type = Boolean.TYPE;
095 }
096 else if (type == Double.class)
097 {
098 type = Double.TYPE;
099 }
100 else if (type == Float.class)
101 {
102 type = Float.TYPE;
103 }
104 else if (type == Integer.class)
105 {
106 type = Integer.TYPE;
107 }
108 else if (type == Long.class)
109 {
110 type = Long.TYPE;
111 }
112 else if (type == Short.class)
113 {
114 type = Short.TYPE;
115 }
116
117 return new DynaProperty(name, type);
118 }
119 }
120
121 public DynaProperty[] getDynaProperties()
122 {
123 if (log.isTraceEnabled())
124 {
125 log.trace("getDynaProperties()");
126 }
127
128 Iterator<String> keys = configuration.getKeys();
129 List<DynaProperty> properties = new ArrayList<DynaProperty>();
130 while (keys.hasNext())
131 {
132 String key = keys.next();
133 DynaProperty property = getDynaProperty(key);
134 properties.add(property);
135 }
136
137 DynaProperty[] propertyArray = new DynaProperty[properties.size()];
138 properties.toArray(propertyArray);
139 if (log.isDebugEnabled())
140 {
141 log.debug("Found " + properties.size() + " properties.");
142 }
143
144 return propertyArray;
145 }
146
147 public String getName()
148 {
149 return ConfigurationDynaBean.class.getName();
150 }
151
152 public DynaBean newInstance() throws IllegalAccessException, InstantiationException
153 {
154 return new ConfigurationDynaBean(configuration);
155 }
156 }