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/*
 Copyright 2016 Goldman Sachs.
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing,
 software distributed under the License is distributed on an
 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 KIND, either express or implied.  See the License for the
 specific language governing permissions and limitations
 under the License.
 */

package com.gs.fw.common.mithra.portal;

import com.gs.fw.common.mithra.MithraDataObject;
import com.gs.fw.common.mithra.MithraTransactionalObject;
import com.gs.fw.common.mithra.MithraDatedTransactionalObject;



public class DatedUpdateDataChooser implements UpdateDataChooser
{

    private static final DatedUpdateDataChooser instance = new DatedUpdateDataChooser();

    private DatedUpdateDataChooser()
    {
    }

    public static DatedUpdateDataChooser getInstance()
    {
        return instance;
    }

    public MithraDataObject chooseDataForMultiUpdate(MithraTransactionalObject mithraObject)
    {
        MithraDatedTransactionalObject mithraDatedTransactionalObject = (MithraDatedTransactionalObject)mithraObject;
        MithraDataObject result = mithraDatedTransactionalObject.zGetCurrentData();
        if (result == null)
        {
            result = mithraObject.zGetTxDataForRead();
        }
        return result;
    }
}