// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.orsup.lazyload;

import org.litesoft.core.typeutils.*;
import org.litesoft.orsup.base.*;
import org.litesoft.orsup.nonpublic.*;
import org.litesoft.orsup.otherattributeaccessors.*;

public class LazyLoadToOneCommonPaired<Owner extends PersistentObjectImpl> extends AbstractLazyLoadToOne<Owner, PersistentObjectImpl> implements ToVariable
{
    protected AttributeAccessorSCDtoOneCommonPaired<Owner> mSCDtoOneCommonPaired;

    public LazyLoadToOneCommonPaired( Owner pOwner, AttributeAccessorSCDtoOneCommonPaired<Owner> pSCDtoOneCommonPaired )
    {
        super( pOwner, pSCDtoOneCommonPaired );
        mSCDtoOneCommonPaired = pSCDtoOneCommonPaired;
    }

    @Override
    public final AttributeAccessorSCDtoOneCommonPaired<Owner> getSCDtoOne()
    {
        return mSCDtoOneCommonPaired;
    }

    public final PersistentObjectImpl getValue()
    {
        return LL_getValue();
    }

    public final void setValue( PersistentObjectImpl pNewThem )
    {
        PersistentObjectImpl zOldThem = getValue();
        if ( !Objects.areNonArraysEqual( pNewThem, zOldThem ) )
        {
            if ( zOldThem != null )
            {
                getSCDtoOne().pairReplaced( mOwner, zOldThem, pNewThem );
                zOldThem.requestDelete();
            }
            mDBValue = (null != (mValue = pNewThem)) ? pNewThem.getRegisteredName() : null;
        }
    }

    /**
     * @param pDBValue !null
     */
    @Override
    protected final PersistentObject<?> LL_loadValueWithNonNull( Object pDBValue )
    {
        Finder zFinder = mOwner.getFinder();
        MetaDataForPO zThemMD = zFinder.getMetaDataRequired( pDBValue.toString() ); // Force validation!
        return zFinder.findOne( zThemMD.getPOregistrationName(), // assumes that that our Key Type is the same as thier Key Type
                                mOwner.getPersistentObjectUniqueKey() );
    }

    @Override
    protected String getBackRefOnUnWire( String pBackRefAttributeNameOnNewThem )
    {
        throw new IllegalStateException( "getBackRefOnUnWire should not be called on CommonPairedToOne" );
    }

    /**
     * @param pNewThem !null
     */
    @Override
    protected final Object LL_extract_db_value( PersistentObjectImpl pNewThem, String pBackRefAttributeNameOnNewThem )
    {
        return pNewThem.getRegisteredName();
    }
}