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    package org.apache.commons.betwixt.expression;
018    
019    import org.apache.commons.beanutils.DynaBean;
020    import org.apache.commons.beanutils.DynaProperty;
021    
022    /**
023     * Updates <code>DynaBean</code>'s.
024     * @since 0.7
025     * @author <a href='http://commons.apache.org'>Apache Commons Team</a>, <a href='http://www.apache.org'>Apache Software Foundation</a>
026     */
027    public class DynaBeanUpdater extends TypedUpdater {
028    
029        /** The name of the dyna property to be updated */
030        private final String propertyName;
031        
032        /**
033         * Constructs a <code>DynaBeanUpdater</code>
034         * for given <code>DynaProperty</code>.
035         * @param dynaProperty <code>DyanProperty</code>, not null
036         */
037        public DynaBeanUpdater(DynaProperty dynaProperty) {
038            this(dynaProperty.getName(), dynaProperty.getType());
039        }
040        
041        /**
042         * Constructs a <code>DynaBeanUpdater</code>
043         * for the given type and property name.
044         * @param propertyName name of the dyan property
045         * @param type type of the dyna property
046         */
047        public DynaBeanUpdater(String propertyName, Class type) {
048            this.propertyName = propertyName;
049            setValueType(type);
050        }
051        
052        
053        /**
054         * Executes the update on the given code>DynaBean</code>
055         * @see org.apache.commons.betwixt.expression.TypedUpdater#executeUpdate(Context, java.lang.Object, java.lang.Object)
056         */
057        protected void executeUpdate(Context context, Object bean, Object value) throws Exception {
058            if (bean instanceof DynaBean)
059            {
060                DynaBean dynaBean = (DynaBean) bean;
061                dynaBean.set(propertyName, value);
062            }
063            else
064            {
065                handleException(context, new IllegalArgumentException("DynaBean required."));
066            }
067        }
068    
069        /**
070         * Outputs something suitable for logging.
071         */
072        public String toString() {
073            return "DynaBeanUpdater [property=" + propertyName + "]";
074        }
075        
076    }