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MicroStream Persistence Binary Data Extension

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package one.microstream.persistence.binary.internal;

/*-
 * #%L
 * microstream-persistence-binary
 * %%
 * Copyright (C) 2019 - 2021 MicroStream Software
 * %%
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License, v. 2.0 are satisfied: GNU General Public License, version 2
 * with the GNU Classpath Exception which is
 * available at https://www.gnu.org/software/classpath/license.html.
 * 
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 * #L%
 */

import static one.microstream.X.notNull;

import one.microstream.persistence.binary.types.Binary;
import one.microstream.persistence.types.PersistenceLoadHandler;
import one.microstream.persistence.types.PersistenceStoreHandler;
import one.microstream.reflect.XReflect;


public final class BinaryHandlerStatelessConstant extends AbstractBinaryHandlerTrivial
{
	///////////////////////////////////////////////////////////////////////////
	// static methods //
	///////////////////
	
	public static  BinaryHandlerStatelessConstant New(final T constantInstance)
	{
		return new BinaryHandlerStatelessConstant<>(
			notNull(constantInstance)
		);
	}
	
	
	
	///////////////////////////////////////////////////////////////////////////
	// instance fields //
	////////////////////
	
	private final T constantInstance;
	
	
	
	///////////////////////////////////////////////////////////////////////////
	// constructors //
	/////////////////

	BinaryHandlerStatelessConstant(final T constantInstance)
	{
		super(XReflect.getClass(constantInstance));
		this.constantInstance = constantInstance;
	}
	
	
	
	///////////////////////////////////////////////////////////////////////////
	// methods //
	////////////

	@Override
	public final void store(
		final Binary                          data    ,
		final T                               instance,
		final long                            objectId,
		final PersistenceStoreHandler handler
	)
	{
		data.storeStateless(this.typeId(), objectId);
	}

	@Override
	public final T create(final Binary data, final PersistenceLoadHandler handler)
	{
		return this.constantInstance;
	}

}