001    // Copyright 2004, 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.hivemind.schema.rules;
016    
017    import org.apache.commons.logging.Log;
018    import org.apache.commons.logging.LogFactory;
019    import org.apache.hivemind.Element;
020    import org.apache.hivemind.ErrorHandler;
021    import org.apache.hivemind.schema.SchemaProcessor;
022    import org.apache.hivemind.schema.Translator;
023    import org.apache.hivemind.util.PropertyUtils;
024    
025    /**
026     * Used to set a property of an object to a literal value.
027     *
028     * @author Howard Lewis Ship
029     */
030    public class SetPropertyRule extends BaseRule
031    {
032        private static final Log LOG = LogFactory.getLog(SetPropertyRule.class);
033    
034        private String _propertyName;
035        private String _value;
036        private Translator _smartTranslator;
037    
038        public void begin(SchemaProcessor processor, Element element)
039        {
040            String value = RuleUtils.processText(processor, element, _value);
041    
042            Object target = processor.peek();
043    
044            try
045            {
046                if (_smartTranslator == null)
047                    _smartTranslator = RuleUtils.getTranslator(processor, "smart");
048    
049                Class propertyType = PropertyUtils.getPropertyType(target, _propertyName);
050    
051                Object finalValue =
052                    _smartTranslator.translate(
053                        processor.getContributingModule(),
054                        propertyType,
055                        value,
056                        element.getLocation());
057    
058                PropertyUtils.write(target, _propertyName, finalValue);
059            }
060            catch (Exception ex)
061            {
062                ErrorHandler eh = processor.getContributingModule().getErrorHandler();
063    
064                String message = RulesMessages.unableToSetProperty(_propertyName, target, ex);
065    
066                eh.error(LOG, message, element.getLocation(), ex);
067            }
068    
069        }
070    
071        public void setPropertyName(String string)
072        {
073            _propertyName = string;
074        }
075    
076        public void setValue(String string)
077        {
078            _value = string;
079        }
080    
081        public String getPropertyName()
082        {
083            return _propertyName;
084        }
085    
086        public String getValue()
087        {
088            return _value;
089        }
090    
091    }