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

import java.util.*;

import org.litesoft.commonfoundation.exceptions.*;

/**
 * Track the ServerVoDataProvider(s) by the ViewObject's Class Name
 */
public final class ServerVoDataProviderMap
{
    private Map<String, ServerVoDataProvider> mMap = new HashMap<String, ServerVoDataProvider>();

    public ServerVoDataProviderMap( VarArgOption... pOptions )
    {
        if ( pOptions != null )
        {
            for ( VarArgOption zOption : pOptions )
            {
                if ( zOption != null )
                {
                    if ( null != mMap.put( zOption.getRegisteredName(), zOption.getVoDataProvider() ) )
                    {
                        throw new PersistenceException( "Duplicate Vo Mapping for " + zOption.getRegisteredName() );
                    }
                }
            }
        }
        if ( mMap.isEmpty() )
        {
            throw new PersistenceException( "No Vo Mappings" );
        }
        for ( ServerVoDataProvider zProvider : mMap.values() ) // This loop should be last as 'this' is leaked!
        {
            zProvider.initialize( this );
        }
    }

    public <T extends IViewObject> ServerVoDataProvider<T> get( Class<T> pViewObjectClass )
    {
        return get( pViewObjectClass.getName() );
    }

    @SuppressWarnings({"unchecked"})
    public <T extends IViewObject> ServerVoDataProvider<T> get( String pViewObjectRegisteredName )
    {
        return (ServerVoDataProvider<T>) mMap.get( pViewObjectRegisteredName );
    }

    public static <T extends IViewObject> VarArgOption mapping( ServerVoDataProvider<T> pServerVoDataProvider )
    {
        return mapping( pServerVoDataProvider.getVOMetaData().getViewObjectClass(), pServerVoDataProvider );
    }

    public static <T,P extends IViewObject> VarArgOption mapping( Class<T> pViewObjectClass, ServerVoDataProvider<P> pServerVoDataProvider )
    {
        return mapping( pViewObjectClass.getName(), pServerVoDataProvider );
    }

    public static VarArgOption mapping( String pViewObjectRegisteredName, ServerVoDataProvider pServerVoDataProvider )
    {
        return new VarArgOption( pViewObjectRegisteredName, pServerVoDataProvider );
    }

    public static class VarArgOption
    {
        private String mRegisteredName;
        private ServerVoDataProvider mVoDataProvider;

        public VarArgOption( String pRegisteredName, ServerVoDataProvider pVoDataProvider )
        {
            mRegisteredName = pRegisteredName;
            mVoDataProvider = pVoDataProvider;
        }

        public String getRegisteredName()
        {
            return mRegisteredName;
        }

        public ServerVoDataProvider getVoDataProvider()
        {
            return mVoDataProvider;
        }
    }
}