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Hibernate example source code file (OneToMany.java)

This example Hibernate source code file (OneToMany.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

iterator, mappingexception, mappingexception, mappings, object, onetomany, persistentclass, persistentclass, string, string, table, table, type, unsupportedoperationexception, util

The Hibernate OneToMany.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, 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.mapping;
import java.util.Iterator;
import org.hibernate.FetchMode;
import org.hibernate.MappingException;
import org.hibernate.cfg.Mappings;
import org.hibernate.engine.spi.Mapping;
import org.hibernate.type.EntityType;
import org.hibernate.type.Type;

/**
 * A mapping for a one-to-many association
 * @author Gavin King
 */
public class OneToMany implements Value {

	private final Mappings mappings;
	private final Table referencingTable;

	private String referencedEntityName;
	private PersistentClass associatedClass;
	private boolean embedded;
	private boolean ignoreNotFound;

	private EntityType getEntityType() {
		return mappings.getTypeResolver().getTypeFactory().manyToOne(
				getReferencedEntityName(), 
				null, 
				false,
				false,
				isEmbedded(),
				isIgnoreNotFound(),
				false
			);
	}

	public OneToMany(Mappings mappings, PersistentClass owner) throws MappingException {
		this.mappings = mappings;
		this.referencingTable = (owner==null) ? null : owner.getTable();
	}

	public PersistentClass getAssociatedClass() {
		return associatedClass;
	}

    /**
     * Associated entity on the many side
     */
	public void setAssociatedClass(PersistentClass associatedClass) {
		this.associatedClass = associatedClass;
	}

	public void createForeignKey() {
		// no foreign key element of for a one-to-many
	}

	public Iterator getColumnIterator() {
		return associatedClass.getKey().getColumnIterator();
	}

	public int getColumnSpan() {
		return associatedClass.getKey().getColumnSpan();
	}

	public FetchMode getFetchMode() {
		return FetchMode.JOIN;
	}

    /** 
     * Table of the owner entity (the "one" side)
     */
	public Table getTable() {
		return referencingTable;
	}

	public Type getType() {
		return getEntityType();
	}

	public boolean isNullable() {
		return false;
	}

	public boolean isSimpleValue() {
		return false;
	}

	public boolean isAlternateUniqueKey() {
		return false;
	}

	public boolean hasFormula() {
		return false;
	}
	
	public boolean isValid(Mapping mapping) throws MappingException {
		if (referencedEntityName==null) {
			throw new MappingException("one to many association must specify the referenced entity");
		}
		return true;
	}

    public String getReferencedEntityName() {
		return referencedEntityName;
	}

    /** 
     * Associated entity on the "many" side
     */    
	public void setReferencedEntityName(String referencedEntityName) {
		this.referencedEntityName = referencedEntityName==null ? null : referencedEntityName.intern();
	}

	public void setTypeUsingReflection(String className, String propertyName) {}
	
	public Object accept(ValueVisitor visitor) {
		return visitor.accept(this);
	}
	
	
	public boolean[] getColumnInsertability() {
		//TODO: we could just return all false...
		throw new UnsupportedOperationException();
	}
	
	public boolean[] getColumnUpdateability() {
		//TODO: we could just return all false...
		throw new UnsupportedOperationException();
	}
	
	public boolean isEmbedded() {
		return embedded;
	}
	
	public void setEmbedded(boolean embedded) {
		this.embedded = embedded;
	}

	public boolean isIgnoreNotFound() {
		return ignoreNotFound;
	}

	public void setIgnoreNotFound(boolean ignoreNotFound) {
		this.ignoreNotFound = ignoreNotFound;
	}
	
}

Other Hibernate examples (source code examples)

Here is a short list of links related to this Hibernate OneToMany.java source code file:

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