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.beanutils;
019    
020    import java.lang.reflect.InvocationTargetException;
021    
022    /**
023     * <p>Implementation of <code>DynaBean</code> that wraps a standard JavaBean
024     * instance, so that DynaBean APIs can be used to access its properties,
025     * though this implementation allows type conversion to occur when properties are set.
026     * This means that (say) Strings can be passed in as values in setter methods and
027     * this DynaBean will convert them to the correct primitive data types.</p>
028     *
029     * <p><strong>IMPLEMENTATION NOTE</strong> - This implementation does not
030     * support the <code>contains()</code> and <code>remove()</code> methods.</p>
031     *
032     * @author James Strachan
033     * @version $Revision: 640259 $ $Date: 2008-03-23 21:31:25 +0000 (Sun, 23 Mar 2008) $
034     */
035    
036    public class ConvertingWrapDynaBean extends WrapDynaBean {
037    
038    
039    
040        /**
041         * Construct a new <code>DynaBean</code> associated with the specified
042         * JavaBean instance.
043         *
044         * @param instance JavaBean instance to be wrapped
045         */
046        public ConvertingWrapDynaBean(Object instance) {
047    
048            super(instance);
049    
050        }
051    
052    
053        /**
054         * Set the value of the property with the specified name
055         * performing any type conversions if necessary. So this method
056         * can accept String values for primitive numeric data types for example.
057         *
058         * @param name Name of the property whose value is to be set
059         * @param value Value to which this property is to be set
060         *
061         * @exception IllegalArgumentException if there are any problems
062         *            copying the property.
063         */
064        public void set(String name, Object value) {
065    
066            try {
067                BeanUtils.copyProperty(instance, name, value);
068            } catch (InvocationTargetException ite) {
069                Throwable cause = ite.getTargetException();
070                throw new IllegalArgumentException
071                        ("Error setting property '" + name +
072                                  "' nested exception - " + cause);
073            } catch (Throwable t) {
074                IllegalArgumentException iae = new IllegalArgumentException
075                        ("Error setting property '" + name +
076                                  "', exception - " + t);
077                BeanUtils.initCause(iae, t);
078                throw iae;
079            }
080    
081        }
082    }