/*
* 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.engine.internal;
import java.util.HashSet;
import java.util.IdentityHashMap;
import java.util.Map;
import java.util.Set;
import org.hibernate.engine.spi.SessionImplementor;
/**
* Tracks non-nullable transient entities that would cause a particular entity insert to fail.
*
* @author Gail Badner
*/
public class NonNullableTransientDependencies {
// Multiple property paths can refer to the same transient entity, so use Set<String>
// for the map value.
private final Map<Object,Set<String>> propertyPathsByTransientEntity =
new IdentityHashMap<Object,Set<String>>();
/* package-protected */
void add(String propertyName, Object transientEntity) {
Set<String> propertyPaths = propertyPathsByTransientEntity.get( transientEntity );
if ( propertyPaths == null ) {
propertyPaths = new HashSet<String>();
propertyPathsByTransientEntity.put( transientEntity, propertyPaths );
}
propertyPaths.add( propertyName );
}
public Iterable<Object> getNonNullableTransientEntities() {
return propertyPathsByTransientEntity.keySet();
}
public Iterable<String> getNonNullableTransientPropertyPaths(Object entity) {
return propertyPathsByTransientEntity.get( entity );
}
public boolean isEmpty() {
return propertyPathsByTransientEntity.isEmpty();
}
public void resolveNonNullableTransientEntity(Object entity) {
if ( propertyPathsByTransientEntity.remove( entity ) == null ) {
throw new IllegalStateException( "Attempt to resolve a non-nullable, transient entity that is not a dependency." );
}
}
public String toLoggableString(SessionImplementor session) {
StringBuilder sb = new StringBuilder( getClass().getSimpleName() ).append( '[' );
for ( Map.Entry<Object,Set<String>> entry : propertyPathsByTransientEntity.entrySet() ) {
sb.append( "transientEntityName=" ).append( session.bestGuessEntityName( entry.getKey() ) );
sb.append( " requiredBy=" ).append( entry.getValue() );
}
sb.append( ']' );
return sb.toString();
}
}