org.hibernate.transform.AliasToEntityMapResultTransformer 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.transform;
import java.util.HashMap;
import java.util.Map;

/**
 * {@link ResultTransformer} implementation which builds a map for each "row",
 * made up  of each aliased value where the alias is the map key.
 * 
 * Since this transformer is stateless, all instances would be considered equal.
 * So for optimization purposes we limit it to a single, singleton {@link #INSTANCE instance}.
 *
 * @author Gavin King
 * @author Steve Ebersole
 */
public class AliasToEntityMapResultTransformer extends AliasedTupleSubsetResultTransformer {

	public static final AliasToEntityMapResultTransformer INSTANCE = new AliasToEntityMapResultTransformer();

	/**
	 * Disallow instantiation of AliasToEntityMapResultTransformer.
	 */
	private AliasToEntityMapResultTransformer() {
	}

	@Override
	public Object transformTuple(Object[] tuple, String[] aliases) {
		Map result = new HashMap(tuple.length);
		for ( int i=0; i