    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</code> 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 $Revision: 727664 $, $Date: 2008-12-18 08:16:09 +0100 (Do, 18. Dez 2008) $
    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</code>
    050         * wrapping the specified <code>Configuration</code> instance.
    051         * @param configuration <code>Configuration</code> 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 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    }