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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.Iterator;
    21  import java.util.ArrayList;
    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: 492216 $, $Date: 2007-01-03 17:51:24 +0100 (Mi, 03 Jan 2007) $
    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("No such property name=[" + name + "]");
    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 }