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Hibernate example source code file (MultiplicityType.java)

This example Hibernate source code file (MultiplicityType.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

glarchproxy, hibernateexception, hibernateexception, integer, integer, io, jdbc, multiplicity, multiplicity, object, object, serializable, sessionimplementor, sql, string, type, types

The Hibernate MultiplicityType.java source code

//$Id: MultiplicityType.java 6592 2005-04-28 15:44:16Z oneovthafew $
package org.hibernate.test.legacy;
import java.io.Serializable;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.engine.internal.ForeignKeys;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.type.IntegerType;
import org.hibernate.type.ManyToOneType;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.StringType;
import org.hibernate.type.Type;
import org.hibernate.type.TypeFactory;
import org.hibernate.usertype.CompositeUserType;

public class MultiplicityType implements CompositeUserType {

	private static final String[] PROP_NAMES = new String[] {
		"count", "glarch"
	};
	private static final int[] SQL_TYPES = new int[] {
			IntegerType.INSTANCE.getSqlTypeDescriptor().getSqlType(),
			StringType.INSTANCE.getSqlTypeDescriptor().getSqlType()
	};
	private static final Type[] TYPES = new Type[] {
			IntegerType.INSTANCE,
			new ManyToOneType(
					new TypeFactory.TypeScope() {
						@Override
						public SessionFactoryImplementor resolveFactory() {
							// todo : can we tie this into org.hibernate.type.TypeFactory.TypeScopeImpl() somehow?
							throw new HibernateException( "Cannot access SessionFactory from here" );
						}
					},
					Glarch.class.getName()
			)
	};

	public String[] getPropertyNames() {
		return PROP_NAMES;
	}

	public Type[] getPropertyTypes() {
		return TYPES;
	}

	public int hashCode(Object x) throws HibernateException {
		Multiplicity o = (Multiplicity) x;
		return o.count + o.glarch.hashCode();
	}

	public Object getPropertyValue(Object component, int property) {
		Multiplicity o = (Multiplicity) component;
		return property==0 ?
			(Object) new Integer(o.count) :
			(Object) o.glarch;
	}

	public void setPropertyValue(
		Object component,
		int property,
		Object value) {

		Multiplicity o = (Multiplicity) component;
		if (property==0) {
			o.count = ( (Integer) value ).intValue();
		}
		else {
			o.glarch = (Glarch) value;
		}
	}

	public int[] sqlTypes() {
		return SQL_TYPES;
	}

	public Class returnedClass() {
		return Multiplicity.class;
	}

	public boolean equals(Object x, Object y) {
		Multiplicity mx = (Multiplicity) x;
		Multiplicity my = (Multiplicity) y;
		if (mx==my) return true;
		if (mx==null || my==null) return false;
		return mx.count==my.count && mx.glarch==my.glarch;
	}

	public Object nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner)
		throws HibernateException, SQLException {

		Integer c = (Integer) IntegerType.INSTANCE.nullSafeGet( rs, names[0], session );
		GlarchProxy g = (GlarchProxy) ( (Session) session ).getTypeHelper().entity( Glarch.class ).nullSafeGet(rs, names[1], session, owner);
		Multiplicity m = new Multiplicity();
		m.count = c==null ? 0 : c.intValue();
		m.glarch = g;
		return m;
	}

	public void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session)
		throws HibernateException, SQLException {

		Multiplicity o = (Multiplicity) value;
		GlarchProxy g;
		Integer c;
		if (o==null) {
			g=null;
			c=new Integer(0);
		}
		else {
			g = o.glarch;
			c = new Integer(o.count);
		}
		StandardBasicTypes.INTEGER.nullSafeSet(st, c, index, session);
		( (Session) session ).getTypeHelper().entity( Glarch.class ).nullSafeSet(st, g, index+1, session);

	}

	public Object deepCopy(Object value) {
		if (value==null) return null;
		Multiplicity v = (Multiplicity) value;
		Multiplicity m = new Multiplicity();
		m.count = v.count;
		m.glarch = v.glarch;
		return m;
	}

	public boolean isMutable() {
		return true;
	}

	public Object assemble(
		Serializable cached,
		SessionImplementor session,
		Object owner) throws HibernateException {
		if (cached==null) return null;
		Serializable[] o = (Serializable[]) cached;
		Multiplicity m = new Multiplicity();
		m.count = ( (Integer) o[0] ).intValue();
		m.glarch = o[1]==null ? 
			null : 
			(GlarchProxy) session.internalLoad( Glarch.class.getName(), o[1], false, false );
		return m;
	}

	public Serializable disassemble(Object value, SessionImplementor session)
	throws HibernateException {
		if (value==null) return null;
		Multiplicity m = (Multiplicity) value;
		return new Serializable[] { 
				new Integer(m.count), 
				ForeignKeys.getEntityIdentifierIfNotUnsaved( Glarch.class.getName(), m.glarch, session ) 
		};
	}

	public Object replace(Object original, Object target, SessionImplementor session, Object owner) 
	throws HibernateException {
		return assemble( disassemble(original, session), session, owner);
	}
	
}

Other Hibernate examples (source code examples)

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