Hibernate example source code file (ComponentMetamodel.java)

This example Hibernate source code file (ComponentMetamodel.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

componentmetamodel, componentmetamodel, componenttuplizer, componenttuplizerfactory, entitymode, entitymode, illegalargumentexception, integer, io, iterator, property, standardproperty, standardproperty, string, string, util

The Hibernate ComponentMetamodel.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
 *
 * 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.tuple.component;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.hibernate.EntityMode;
import org.hibernate.HibernateException;
import org.hibernate.mapping.Component;
import org.hibernate.mapping.Property;
import org.hibernate.tuple.PropertyFactory;
import org.hibernate.tuple.StandardProperty;
import org.hibernate.tuple.Tuplizer;

/**
 * Centralizes metamodel information about a component.
 *
 * @author Steve Ebersole
 */
public class ComponentMetamodel implements Serializable {

	// TODO : will need reference to session factory to fully complete HHH-1907

//	private final SessionFactoryImplementor sessionFactory;
	private final String role;
	private final boolean isKey;
	private final StandardProperty[] properties;

	private final EntityMode entityMode;
	private final ComponentTuplizer componentTuplizer;

	// cached for efficiency...
	private final int propertySpan;
	private final Map propertyIndexes = new HashMap();

//	public ComponentMetamodel(Component component, SessionFactoryImplementor sessionFactory) {
	public ComponentMetamodel(Component component) {
//		this.sessionFactory = sessionFactory;
		this.role = component.getRoleName();
		this.isKey = component.isKey();
		propertySpan = component.getPropertySpan();
		properties = new StandardProperty[propertySpan];
		Iterator itr = component.getPropertyIterator();
		int i = 0;
		while ( itr.hasNext() ) {
			Property property = ( Property ) itr.next();
			properties[i] = PropertyFactory.buildStandardProperty( property, false );
			propertyIndexes.put( property.getName(), i );
			i++;
		}

		entityMode = component.hasPojoRepresentation() ? EntityMode.POJO : EntityMode.MAP;

		// todo : move this to SF per HHH-3517; also see HHH-1907 and ComponentMetamodel
		final ComponentTuplizerFactory componentTuplizerFactory = new ComponentTuplizerFactory();
		final String tuplizerClassName = component.getTuplizerImplClassName( entityMode );
		if ( tuplizerClassName == null ) {
			componentTuplizer = componentTuplizerFactory.constructDefaultTuplizer( entityMode, component );
		}
		else {
			componentTuplizer = componentTuplizerFactory.constructTuplizer( tuplizerClassName, component );
		}
	}

	public boolean isKey() {
		return isKey;
	}

	public int getPropertySpan() {
		return propertySpan;
	}

	public StandardProperty[] getProperties() {
		return properties;
	}

	public StandardProperty getProperty(int index) {
		if ( index < 0 || index >= propertySpan ) {
			throw new IllegalArgumentException( "illegal index value for component property access [request=" + index + ", span=" + propertySpan + "]" );
		}
		return properties[index];
	}

	public int getPropertyIndex(String propertyName) {
		Integer index = ( Integer ) propertyIndexes.get( propertyName );
		if ( index == null ) {
			throw new HibernateException( "component does not contain such a property [" + propertyName + "]" );
		}
		return index.intValue();
	}

	public StandardProperty getProperty(String propertyName) {
		return getProperty( getPropertyIndex( propertyName ) );
	}

	public EntityMode getEntityMode() {
		return entityMode;
	}

	public ComponentTuplizer getComponentTuplizer() {
		return componentTuplizer;
	}

}