/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, 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.mapping;
import org.hibernate.MappingException;
import org.hibernate.cfg.Mappings;
import org.hibernate.engine.spi.Mapping;
/**
* A collection with a synthetic "identifier" column
*/
public abstract class IdentifierCollection extends Collection {
public static final String DEFAULT_IDENTIFIER_COLUMN_NAME = "id";
private KeyValue identifier;
public IdentifierCollection(Mappings mappings, PersistentClass owner) {
super( mappings, owner );
}
public KeyValue getIdentifier() {
return identifier;
}
public void setIdentifier(KeyValue identifier) {
this.identifier = identifier;
}
public final boolean isIdentified() {
return true;
}
void createPrimaryKey() {
if ( !isOneToMany() ) {
PrimaryKey pk = new PrimaryKey();
pk.addColumns( getIdentifier().getColumnIterator() );
getCollectionTable().setPrimaryKey(pk);
}
else {
// don't create a unique key, 'cos some
// databases don't like a UK on nullable
// columns
//getCollectionTable().createUniqueKey( getIdentifier().getConstraintColumns() );
}
// create an index on the key columns??
}
public void validate(Mapping mapping) throws MappingException {
super.validate(mapping);
if ( !getIdentifier().isValid(mapping) ) {
throw new MappingException(
"collection id mapping has wrong number of columns: " +
getRole() +
" type: " +
getIdentifier().getType().getName()
);
}
}
}