org.hibernate.engine.spi.EntityEntryExtraState Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2014, 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.engine.spi;
/**
* Navigation methods for extra state objects attached to {@link org.hibernate.engine.spi.EntityEntry}.
*
* @author Emmanuel Bernard
*/
public interface EntityEntryExtraState {
/**
* Attach additional state to the core state of {@link org.hibernate.engine.spi.EntityEntry}
*
* Implementations must delegate to the next state or add it as next state if last in line.
*/
void addExtraState(EntityEntryExtraState extraState);
/**
* Retrieve additional state by class type or null if no extra state of that type is present.
*
* Implementations must return self if they match or delegate discovery to the next state in line.
*/
T getExtraState(Class extraStateType);
//a remove method is ugly to define and has not real use case that we found: left out
}