// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.orsup.base;

import java.util.*;

import org.litesoft.bo.attributes.*;
import org.litesoft.orsup.lazyload.*;
import org.litesoft.orsup.nonpublic.*;
import org.litesoft.orsup.otherattributeaccessors.*;

public abstract class AbstractAttributeAccessorSCDtoMany<Owner extends PersistentObjectImpl, Them extends PersistentObjectImpl> extends AbstractAttributeAccessorSCDtoPO<Owner, Them>
{
    private String mOrderByAttribute;

    protected AbstractAttributeAccessorSCDtoMany( String pName, String pToManyTypeName, String pBackReference, String pOrderByAttribute, //
                                                  boolean pThemDependantOnUs, boolean pRequired, AttributeMetaData pAMD )
    {
        super( pName, null, pToManyTypeName, pBackReference, pThemDependantOnUs, pRequired, pAMD );
        mOrderByAttribute = pOrderByAttribute;
    }

    public String getOrderByAttribute()
    {
        return mOrderByAttribute;
    }

    @Override
    public Form getForm()
    {
        return Form.ToMany;
    }

    @Override
    abstract public AbstractLazyLoadToMany<Owner, Them> getValueHolder( Owner pPO );

    abstract public void addValueOnPO( Owner pPO, Object pValue );

    abstract public void removeValueOnPO( Owner pPO, Object pValue );

    @Override
    public final Object db_getValueOnPO( Owner pPO )
    {
        throw new UnsupportedOperationException( "Persistence not supported on To Many" );
    }

    @Override
    public final void db_setValueOnPO( Owner pPO, Object pValue )
    {
        throw new UnsupportedOperationException( "Persistence not supported on To Many" );
    }

    /**
     * convert pObject to 'Them' where might be: 'null', a proper 'Them', UniqueKey, URL, ObjectHandle or Lists of any of the previous
     */
    public List<Them> to_POs( Owner pPO, Class<Them> pPersistentObjectClass, Object pObject )
    {
        if ( pObject == null )
        {
            return null;
        }
        List<Them> rv = new ArrayList<Them>();
        if ( pObject instanceof List )
        {
            for ( Object o : (List) pObject )
            {
                Them them = to_PO( pPO, pPersistentObjectClass, o );
                if ( them != null )
                {
                    rv.add( them );
                }
            }
        }
        else
        {
            Them them = to_PO( pPO, pPersistentObjectClass, pObject );
            if ( them != null )
            {
                rv.add( them );
            }
        }
        return rv;
    }
}