org.hibernate.loader.entity.plan.DynamicBatchingEntityLoaderBuilder Maven / Gradle / Ivy

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Hibernate's core ORM functionality

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or .
 */
package org.hibernate.loader.entity.plan;

import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.loader.entity.UniqueEntityLoader;
import org.hibernate.persister.entity.OuterJoinLoadable;

/**
 * A walking/plan based BatchingEntityLoaderBuilder that builds entity-loader instances
 * capable of dynamically building its batch-fetch SQL based on the actual number of
 * entity ids waiting to be batch fetched.
 */
public class DynamicBatchingEntityLoaderBuilder extends AbstractBatchingEntityLoaderBuilder {
	/**
	 * Singleton access
	 */
	public static final DynamicBatchingEntityLoaderBuilder INSTANCE = new DynamicBatchingEntityLoaderBuilder();

	@Override
	protected UniqueEntityLoader buildBatchingLoader(
			OuterJoinLoadable persister,
			int batchSize,
			LockMode lockMode,
			SessionFactoryImplementor factory,
			LoadQueryInfluencers influencers) {
		return buildBatchingLoader( persister, batchSize, LockOptions.interpret( lockMode ), factory, influencers );
	}

	@Override
	protected UniqueEntityLoader buildBatchingLoader(
			OuterJoinLoadable persister,
			int batchSize,
			LockOptions lockOptions,
			SessionFactoryImplementor factory,
			LoadQueryInfluencers influencers) {
		return new DynamicBatchingEntityLoader( persister, batchSize, lockOptions, factory, influencers );
	}
}