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Core of the Object/Lucene mapper, query engine and index management

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/*
 * Hibernate Search, full-text search for your domain model
 *
 * 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.search.backend;

import java.io.Serializable;

import org.hibernate.search.backend.impl.WorkVisitor;

/**
 * A unit of work triggering an optimize operation.
 * This work does not propagate to a cluster: it should be filtered before being sent to
 * the network.
 *
 * @author Andrew Hahn
 * @author Emmanuel Bernard
 */
public class OptimizeLuceneWork extends LuceneWork implements Serializable {

	public static final OptimizeLuceneWork INSTANCE = new OptimizeLuceneWork();

	/**
	 * Optimizes the index(es) of a specific entity
	 * @param entity
	 */
	public OptimizeLuceneWork(Class entity) {
		super( null, null, entity );
	}

	/**
	 * Optimizes any index
	 */
	private OptimizeLuceneWork() {
		super( null, null, null );
	}

	@Override
	public  T getWorkDelegate(final WorkVisitor visitor) {
		return visitor.getDelegate( this );
	}

	@Override
	public String toString() {
		Class entityClass = this.getEntityClass();
		if ( entityClass == null ) {
			return "OptimizeLuceneWork: global";
		}
		else {
			return "OptimizeLuceneWork: " + this.getEntityClass().getName();
		}
	}

}