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.configuration2.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.configuration2.Configuration;
028import org.apache.commons.logging.Log;
029import org.apache.commons.logging.LogFactory;
030
031/**
032 * The {@code ConfigurationDynaClass} dynamically determines properties for
033 * a {@code ConfigurationDynaBean} from a wrapped configuration-collection
034 * {@link org.apache.commons.configuration2.Configuration} instance.
035 *
036 * @author <a href="mailto:ricardo.gladwell@btinternet.com">Ricardo Gladwell</a>
037 * @version $Id: ConfigurationDynaClass.java 1790899 2017-04-10 21:56:46Z ggregory $
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    @Override
064    public DynaProperty getDynaProperty(String name)
065    {
066        if (LOG.isTraceEnabled())
067        {
068            LOG.trace("getDynaProperty(" + name + ")");
069        }
070
071        if (name == null)
072        {
073            throw new IllegalArgumentException("Property name must not be null!");
074        }
075
076        Object value = configuration.getProperty(name);
077        if (value == null)
078        {
079            return null;
080        }
081        else
082        {
083            Class<?> type = value.getClass();
084
085            if (type == Byte.class)
086            {
087                type = Byte.TYPE;
088            }
089            if (type == Character.class)
090            {
091                type = Character.TYPE;
092            }
093            else if (type == Boolean.class)
094            {
095                type = Boolean.TYPE;
096            }
097            else if (type == Double.class)
098            {
099                type = Double.TYPE;
100            }
101            else if (type == Float.class)
102            {
103                type = Float.TYPE;
104            }
105            else if (type == Integer.class)
106            {
107                type = Integer.TYPE;
108            }
109            else if (type == Long.class)
110            {
111                type = Long.TYPE;
112            }
113            else if (type == Short.class)
114            {
115                type = Short.TYPE;
116            }
117
118            return new DynaProperty(name, type);
119        }
120    }
121
122    @Override
123    public DynaProperty[] getDynaProperties()
124    {
125        if (LOG.isTraceEnabled())
126        {
127            LOG.trace("getDynaProperties()");
128        }
129
130        Iterator<String> keys = configuration.getKeys();
131        List<DynaProperty> properties = new ArrayList<>();
132        while (keys.hasNext())
133        {
134            String key = keys.next();
135            DynaProperty property = getDynaProperty(key);
136            properties.add(property);
137        }
138
139        DynaProperty[] propertyArray = new DynaProperty[properties.size()];
140        properties.toArray(propertyArray);
141        if (LOG.isDebugEnabled())
142        {
143            LOG.debug("Found " + properties.size() + " properties.");
144        }
145
146        return propertyArray;
147    }
148
149    @Override
150    public String getName()
151    {
152        return ConfigurationDynaBean.class.getName();
153    }
154
155    @Override
156    public DynaBean newInstance() throws IllegalAccessException, InstantiationException
157    {
158        return new ConfigurationDynaBean(configuration);
159    }
160}