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The core O/RM functionality as provided by Hibernate
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.type;
import java.io.Serializable;
import java.util.HashSet;
import org.hibernate.collection.internal.PersistentSet;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.persister.collection.CollectionPersister;
public class SetType extends CollectionType {
public SetType(TypeFactory.TypeScope typeScope, String role, String propertyRef) {
super( typeScope, role, propertyRef );
}
@Override
public PersistentCollection instantiate(SharedSessionContractImplementor session, CollectionPersister persister, Serializable key) {
return new PersistentSet( session );
}
@Override
public Class getReturnedClass() {
return java.util.Set.class;
}
@Override
public PersistentCollection wrap(SharedSessionContractImplementor session, Object collection) {
return new PersistentSet( session, (java.util.Set) collection );
}
@Override
public Object instantiate(int anticipatedSize) {
return anticipatedSize <= 0
? new HashSet()
: new HashSet( anticipatedSize + (int)( anticipatedSize * .75f ), .75f );
}
}