/*
 * 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.service.spi;

Optional contract for services that wrap stuff that to which it is useful to have access. For example, a service that maintains a DataSource might want to expose access to the DataSource or its Connection instances. 
Author:
Steve Ebersole/**
 * Optional contract for services that wrap stuff that to which it is useful to have access.  For example, a service
 * that maintains a {@link javax.sql.DataSource} might want to expose access to the {@link javax.sql.DataSource} or
 * its {@link java.sql.Connection} instances.
 *
 * @author Steve Ebersole
 */
public interface Wrapped {
	
Can this wrapped service be unwrapped as the indicated type?
Params:
unwrapType – The type to check.
Returns:
True/false./**
	 * Can this wrapped service be unwrapped as the indicated type?
	 *
	 * @param unwrapType The type to check.
	 *
	 * @return True/false.
	 */
	public boolean isUnwrappableAs(Class unwrapType);

	
Unproxy the service proxy
Params:
unwrapType – The java type as which to unwrap this instance.
Throws:
UnknownUnwrapTypeException – if the servicebe unwrapped as the indicated type
Returns:
The unwrapped reference/**
	 * Unproxy the service proxy
	 *
	 * @param unwrapType The java type as which to unwrap this instance.
	 *
	 * @return The unwrapped reference
	 *
	 * @throws UnknownUnwrapTypeException if the servicebe unwrapped as the indicated type
	 */
	public <T> T unwrap(Class<T> unwrapType);
}