Hibernate example source code file (EnumConversionHelper.java)

This example Hibernate source code file (EnumConversionHelper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

all, assertionfailure, assertionfailure, cascadestyle, enumconversionhelper, enumconversionhelper, fetchmode, persist, set, set, subselect, table, unknown, unknown, util

The Hibernate EnumConversionHelper.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.hibernate.metamodel.source.annotations;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.GenerationType;

import org.hibernate.AssertionFailure;
import org.hibernate.FetchMode;
import org.hibernate.engine.spi.CascadeStyle;
import org.hibernate.id.MultipleHiLoPerTableGenerator;
import org.hibernate.internal.util.collections.CollectionHelper;

/**
 * Helper class which converts between different enum types.
 *
 * @author Hardy Ferentschik
 */
public class EnumConversionHelper {
	private EnumConversionHelper() {
	}

	public static String generationTypeToGeneratorStrategyName(GenerationType generatorEnum, boolean useNewGeneratorMappings) {
		switch ( generatorEnum ) {
			case IDENTITY:
				return "identity";
			case AUTO:
				return useNewGeneratorMappings
						? "enhanced-sequence"
						: "native";
			case TABLE:
				return useNewGeneratorMappings
						? "enhanced-table"
						: MultipleHiLoPerTableGenerator.class.getName();
			case SEQUENCE:
				return useNewGeneratorMappings
						? "enhanced-sequence"
						: "seqhilo";
		}
		throw new AssertionFailure( "Unknown GeneratorType: " + generatorEnum );
	}

	public static CascadeStyle cascadeTypeToCascadeStyle(CascadeType cascadeType) {
		switch ( cascadeType ) {
			case ALL: {
				return CascadeStyle.ALL;
			}
			case PERSIST: {
				return CascadeStyle.PERSIST;
			}
			case MERGE: {
				return CascadeStyle.MERGE;
			}
			case REMOVE: {
				return CascadeStyle.DELETE;
			}
			case REFRESH: {
				return CascadeStyle.REFRESH;
			}
			case DETACH: {
				return CascadeStyle.EVICT;
			}
			default: {
				throw new AssertionFailure( "Unknown cascade type" );
			}
		}
	}

	public static FetchMode annotationFetchModeToHibernateFetchMode(org.hibernate.annotations.FetchMode annotationFetchMode) {
		switch ( annotationFetchMode ) {
			case JOIN: {
				return FetchMode.JOIN;
			}
			case SELECT: {
				return FetchMode.SELECT;
			}
			case SUBSELECT: {
				// todo - is this correct? can the conversion be made w/o any additional information, eg
				// todo - association nature
				return FetchMode.SELECT;
			}
			default: {
				throw new AssertionFailure( "Unknown fetch mode" );
			}
		}
	}

	public static Set<CascadeStyle> cascadeTypeToCascadeStyleSet(Set cascadeTypes) {
		if ( CollectionHelper.isEmpty( cascadeTypes ) ) {
			return Collections.emptySet();
		}
		Set<CascadeStyle> cascadeStyleSet = new HashSet();
		for ( CascadeType cascadeType : cascadeTypes ) {
			cascadeStyleSet.add( cascadeTypeToCascadeStyle( cascadeType ) );
		}
		return cascadeStyleSet;
	}
}