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/*
* 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.metadata;
import java.io.Serializable;
import java.util.Map;
import org.hibernate.HibernateException;
import org.hibernate.EntityMode;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.type.Type;
/**
* Exposes entity class metadata to the application
*
* @see org.hibernate.SessionFactory#getClassMetadata(Class)
* @author Gavin King
*/
public interface ClassMetadata {
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// stuff that is persister-centric and/or EntityInfo-centric ~~~~~~~~~~~~~~
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* The name of the entity
*/
public String getEntityName();
/**
* Get the name of the identifier property (or return null)
*/
public String getIdentifierPropertyName();
/**
* Get the names of the class' persistent properties
*/
public String[] getPropertyNames();
/**
* Get the identifier Hibernate type
*/
public Type getIdentifierType();
/**
* Get the Hibernate types of the class properties
*/
public Type[] getPropertyTypes();
/**
* Get the type of a particular (named) property
*/
public Type getPropertyType(String propertyName) throws HibernateException;
/**
* Does this class support dynamic proxies?
*/
public boolean hasProxy();
/**
* Are instances of this class mutable?
*/
public boolean isMutable();
/**
* Are instances of this class versioned by a timestamp or version number column?
*/
public boolean isVersioned();
/**
* Get the index of the version property
*/
public int getVersionProperty();
/**
* Get the nullability of the class' persistent properties
*/
public boolean[] getPropertyNullability();
/**
* Get the "laziness" of the properties of this class
*/
public boolean[] getPropertyLaziness();
/**
* Does this class have an identifier property?
*/
public boolean hasIdentifierProperty();
/**
* Does this entity declare a natural id?
*/
public boolean hasNaturalIdentifier();
/**
* Which properties hold the natural id?
*/
public int[] getNaturalIdentifierProperties();
/**
* Does this entity have mapped subclasses?
*/
public boolean hasSubclasses();
/**
* Does this entity extend a mapped superclass?
*/
public boolean isInherited();
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// stuff that is tuplizer-centric, but is passed a session ~~~~~~~~~~~~~~~~
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* Return the values of the mapped properties of the object
*/
public Object[] getPropertyValuesToInsert(Object entity, Map mergeMap, SessionImplementor session)
throws HibernateException;
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// stuff that is Tuplizer-centric ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/**
* The persistent class, or null
*/
public Class getMappedClass(EntityMode entityMode);
/**
* Create a class instance initialized with the given identifier
*
* @deprecated Use {@link #instantiate(Serializable, SessionImplementor)} instead
* @noinspection JavaDoc
*/
public Object instantiate(Serializable id, EntityMode entityMode) throws HibernateException;
/**
* Create a class instance initialized with the given identifier
*
* @param id The identifier value to use (may be null to represent no value)
* @param session The session from which the request originated.
*
* @return The instantiated entity.
*/
public Object instantiate(Serializable id, SessionImplementor session);
/**
* Get the value of a particular (named) property
*/
public Object getPropertyValue(Object object, String propertyName, EntityMode entityMode) throws HibernateException;
/**
* Extract the property values from the given entity.
*
* @param entity The entity from which to extract the property values.
* @param entityMode The entity-mode of the given entity
* @return The property values.
* @throws HibernateException
*/
public Object[] getPropertyValues(Object entity, EntityMode entityMode) throws HibernateException;
/**
* Set the value of a particular (named) property
*/
public void setPropertyValue(Object object, String propertyName, Object value, EntityMode entityMode) throws HibernateException;
/**
* Set the given values to the mapped properties of the given object
*/
public void setPropertyValues(Object object, Object[] values, EntityMode entityMode) throws HibernateException;
/**
* Get the identifier of an instance (throw an exception if no identifier property)
* @deprecated Use {@link #getIdentifier(Object,SessionImplementor)} instead
* @noinspection JavaDoc
*/
public Serializable getIdentifier(Object object, EntityMode entityMode) throws HibernateException;
/**
* Get the identifier of an instance (throw an exception if no identifier property)
*
* @param entity The entity for which to get the identifier
* @param session The session from which the request originated
*
* @return The identifier
*/
public Serializable getIdentifier(Object entity, SessionImplementor session);
/**
* Inject the identifier value into the given entity.
*
* Has no effect if the entity does not define an identifier property
*
* @param entity The entity to inject with the identifier value.
* @param id The value to be injected as the identifier.
* @param entityMode The entity mode
*
* @deprecated Use {@link #setIdentifier(Object, Serializable, SessionImplementor)} instead.
* @noinspection JavaDoc
*/
public void setIdentifier(Object entity, Serializable id, EntityMode entityMode) throws HibernateException;
/**
* Inject the identifier value into the given entity.
*
* @param entity The entity to inject with the identifier value.
* @param id The value to be injected as the identifier.
* @param session The session from which is requests originates
*/
public void setIdentifier(Object entity, Serializable id, SessionImplementor session);
/**
* Does the class implement the Lifecycle interface?
*/
public boolean implementsLifecycle(EntityMode entityMode);
/**
* Does the class implement the Validatable interface?
*/
public boolean implementsValidatable(EntityMode entityMode);
/**
* Get the version number (or timestamp) from the object's version property
* (or return null if not versioned)
*/
public Object getVersion(Object object, EntityMode entityMode) throws HibernateException;
}
