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    1   /*
    2    * Copyright 2001-2004 The Apache Software Foundation.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License")
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *     http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16
    17  package org.apache.commons.configuration.beanutils;
    18
    19  import java.util.Iterator;
    20  import java.util.ArrayList;
    21  import java.util.List;
    22
    23  import org.apache.commons.beanutils.DynaBean;
    24  import org.apache.commons.beanutils.DynaClass;
    25  import org.apache.commons.beanutils.DynaProperty;
    26  import org.apache.commons.configuration.Configuration;
    27  import org.apache.commons.logging.Log;
    28  import org.apache.commons.logging.LogFactory;
    29
    30  /***
    31   * The <tt>ConfigurationDynaClass</tt> dynamically determines properties for
    32   * a <code>ConfigurationDynaBean</code> from a wrapped configuration-collection
    33   * {@link org.apache.commons.configuration.Configuration} instance.
    34   *
    35   * @author <a href="mailto:ricardo.gladwell@btinternet.com">Ricardo Gladwell</a>
    36   * @version $Revision: 1.4 $, $Date: 2004/09/21 17:49:39 $
    37   * @since 1.0-rc1
    38   */
    39  public class ConfigurationDynaClass implements DynaClass
    40  {
    41      private final static Log log = LogFactory.getLog(ConfigurationDynaClass.class);
    42
    43      Configuration configuration;
    44
    45      /***
    46       * Construct an instance of a <code>ConfigurationDynaClass</code>
    47       * wrapping the specified <code>Configuration</code> instance.
    48       * @param configuration <code>Configuration</code> instance.
    49       */
    50      public ConfigurationDynaClass(Configuration configuration)
    51      {
    52          super();
    53          if (log.isTraceEnabled()) log.trace("ConfigurationDynaClass(" + configuration + ")");
    54          this.configuration = configuration;
    55      }
    56
    57      /***
    58       * @see org.apache.commons.beanutils.DynaClass#getDynaProperty(java.lang.String)
    59       */
    60      public DynaProperty getDynaProperty(String name)
    61      {
    62          if (log.isTraceEnabled())
    63          {
    64              log.trace("getDynaProperty(" + name + ")");
    65          }
    66
    67          if (name == null)
    68          {
    69              throw new IllegalArgumentException("No such property name=[" + name + "]");
    70          }
    71
    72          Object value = configuration.getProperty(name);
    73          if (value == null)
    74          {
    75              return null;
    76          }
    77          else
    78          {
    79              Class type = value.getClass();
    80
    81              if (type == Byte.class)
    82              {
    83                  type = Byte.TYPE;
    84              }
    85              if (type == Character.class)
    86              {
    87                  type = Character.TYPE;
    88              }
    89              else if (type == Boolean.class)
    90              {
    91                  type = Boolean.TYPE;
    92              }
    93              else if (type == Double.class)
    94              {
    95                  type = Double.TYPE;
    96              }
    97              else if (type == Float.class)
    98              {
    99                  type = Float.TYPE;
    100             }
    101             else if (type == Integer.class)
    102             {
    103                 type = Integer.TYPE;
    104             }
    105             else if (type == Long.class)
    106             {
    107                 type = Long.TYPE;
    108             }
    109             else if (type == Short.class)
    110             {
    111                 type = Short.TYPE;
    112             }
    113
    114             return new DynaProperty(name, type);
    115         }
    116     }
    117
    118     /***
    119      * @see org.apache.commons.beanutils.DynaClass#getDynaProperties()
    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     /***
    148      * @see org.apache.commons.beanutils.DynaClass#getName()
    149      */
    150     public String getName()
    151     {
    152         return ConfigurationDynaBean.class.getName();
    153     }
    154
    155     /***
    156      * @see org.apache.commons.beanutils.DynaClass#newInstance()
    157      */
    158     public DynaBean newInstance() throws IllegalAccessException, InstantiationException
    159     {
    160         return new ConfigurationDynaBean(configuration);
    161     }
    162
    163 }