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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.commons.configuration.beanutils;
19  
20  import java.util.ArrayList;
21  import java.util.Iterator;
22  import java.util.List;
23  
24  import org.apache.commons.beanutils.DynaBean;
25  import org.apache.commons.beanutils.DynaClass;
26  import org.apache.commons.beanutils.DynaProperty;
27  import org.apache.commons.configuration.Configuration;
28  import org.apache.commons.logging.Log;
29  import org.apache.commons.logging.LogFactory;
30  
31  /***
32   * The <tt>ConfigurationDynaClass</tt> dynamically determines properties for
33   * a <code>ConfigurationDynaBean</code> from a wrapped configuration-collection
34   * {@link org.apache.commons.configuration.Configuration} instance.
35   *
36   * @author <a href="mailto:ricardo.gladwell@btinternet.com">Ricardo Gladwell</a>
37   * @version $Revision: 727664 $, $Date: 2008-12-18 08:16:09 +0100 (Do, 18 Dez 2008) $
38   * @since 1.0-rc1
39   */
40  public class ConfigurationDynaClass implements DynaClass
41  {
42      /*** The logger.*/
43      private static Log log = LogFactory.getLog(ConfigurationDynaClass.class);
44  
45      /*** Stores the associated configuration.*/
46      private Configuration configuration;
47  
48      /***
49       * Construct an instance of a <code>ConfigurationDynaClass</code>
50       * wrapping the specified <code>Configuration</code> instance.
51       * @param configuration <code>Configuration</code> instance.
52       */
53      public ConfigurationDynaClass(Configuration configuration)
54      {
55          super();
56          if (log.isTraceEnabled())
57          {
58              log.trace("ConfigurationDynaClass(" + configuration + ")");
59          }
60          this.configuration = configuration;
61      }
62  
63      public DynaProperty getDynaProperty(String name)
64      {
65          if (log.isTraceEnabled())
66          {
67              log.trace("getDynaProperty(" + name + ")");
68          }
69  
70          if (name == null)
71          {
72              throw new IllegalArgumentException("Property name must not be null!");
73          }
74  
75          Object value = configuration.getProperty(name);
76          if (value == null)
77          {
78              return null;
79          }
80          else
81          {
82              Class type = value.getClass();
83  
84              if (type == Byte.class)
85              {
86                  type = Byte.TYPE;
87              }
88              if (type == Character.class)
89              {
90                  type = Character.TYPE;
91              }
92              else if (type == Boolean.class)
93              {
94                  type = Boolean.TYPE;
95              }
96              else if (type == Double.class)
97              {
98                  type = Double.TYPE;
99              }
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 keys = configuration.getKeys();
129         List properties = new ArrayList();
130         while (keys.hasNext())
131         {
132             String key = (String) 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 }