001    // Copyright 2006, 2007, 2010 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.tapestry5.internal.services;
016    
017    import org.apache.tapestry5.ioc.internal.util.InternalUtils;
018    import org.apache.tapestry5.services.PersistentFieldChange;
019    
020    public class PersistentFieldChangeImpl implements PersistentFieldChange
021    {
022        private final String componentId;
023    
024        private final String fieldName;
025    
026        private final Object value;
027    
028        public PersistentFieldChangeImpl(final String componentId, final String fieldName, final Object value)
029        {
030            assert componentId != null;
031            assert InternalUtils.isNonBlank(fieldName);
032    
033            this.componentId = componentId;
034            this.fieldName = fieldName;
035            this.value = value;
036        }
037    
038        public String getComponentId()
039        {
040            return componentId;
041        }
042    
043        public String getFieldName()
044        {
045            return fieldName;
046        }
047    
048        public Object getValue()
049        {
050            return value;
051        }
052    }