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
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.ioc.internal.util.InternalUtils;
018import org.apache.tapestry5.services.PersistentFieldChange;
019
020public 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}