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
018package org.apache.commons.configuration.beanutils;
019
020import java.util.ArrayList;
021import java.util.Iterator;
022import java.util.List;
023
024import org.apache.commons.beanutils.DynaBean;
025import org.apache.commons.beanutils.DynaClass;
026import org.apache.commons.beanutils.DynaProperty;
027import org.apache.commons.configuration.Configuration;
028import org.apache.commons.logging.Log;
029import 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 1366932 2012-07-29 20:06:31Z oheger $
038 * @since 1.0-rc1
039 */
040public class ConfigurationDynaClass implements DynaClass
041{
042    /** The logger.*/
043    private static final Log LOG = LogFactory.getLog(ConfigurationDynaClass.class);
044
045    /** Stores the associated configuration.*/
046    private final 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}