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 }