/*
 * 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 <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.tuple;

import java.lang.reflect.Constructor;

import org.hibernate.HibernateException;
import org.hibernate.annotations.GeneratorType;
import org.hibernate.internal.util.ReflectHelper;

A AnnotationValueGeneration which allows to specify the ValueGenerator to be used to determine the value of the annotated property.
Author:Gunnar Morling
/** * A {@link AnnotationValueGeneration} which allows to specify the {@link ValueGenerator} to be used to determine the * value of the annotated property. * * @author Gunnar Morling */
public class VmValueGeneration implements AnnotationValueGeneration<GeneratorType> { private GenerationTiming generationTiming; private Constructor<? extends ValueGenerator<?>> constructor; @Override public void initialize(GeneratorType annotation, Class<?> propertyType) { Class<? extends ValueGenerator<?>> generatorType = annotation.type(); constructor = ReflectHelper.getDefaultConstructor( generatorType ); this.generationTiming = annotation.when().getEquivalent(); } @Override public GenerationTiming getGenerationTiming() { return generationTiming; } @Override public ValueGenerator<?> getValueGenerator() { try { return constructor.newInstance(); } catch (Exception e) { throw new HibernateException( "Couldn't instantiate value generator", e ); } } @Override public boolean referenceColumnInSql() { return false; } @Override public String getDatabaseGeneratedReferencedColumnValue() { return null; } }