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/*
* 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.loader.plan.build.internal.spaces;
import org.hibernate.loader.plan.build.spi.ExpandingCollectionQuerySpace;
import org.hibernate.loader.plan.build.spi.ExpandingQuerySpaces;
import org.hibernate.loader.plan.spi.Join;
import org.hibernate.loader.plan.spi.JoinDefinedByMetadata;
import org.hibernate.persister.collection.CollectionPersister;
import org.hibernate.persister.collection.CollectionPropertyNames;
import org.hibernate.persister.collection.QueryableCollection;
import org.hibernate.persister.entity.PropertyMapping;
/**
* @author Steve Ebersole
*/
public class CollectionQuerySpaceImpl extends AbstractQuerySpace implements ExpandingCollectionQuerySpace {
private final CollectionPersister persister;
private JoinDefinedByMetadata elementJoin;
private JoinDefinedByMetadata indexJoin;
public CollectionQuerySpaceImpl(
CollectionPersister persister,
String uid,
ExpandingQuerySpaces querySpaces,
boolean canJoinsBeRequired) {
super( uid, Disposition.COLLECTION, querySpaces, canJoinsBeRequired );
this.persister = persister;
}
@Override
public CollectionPersister getCollectionPersister() {
return persister;
}
@Override
public PropertyMapping getPropertyMapping() {
return (PropertyMapping) persister;
}
public String[] toAliasedColumns(String alias, String propertyName) {
final QueryableCollection queryableCollection = (QueryableCollection) persister;
if ( propertyName.equals( CollectionPropertyNames.COLLECTION_ELEMENTS ) ) {
return queryableCollection.getElementColumnNames( alias );
}
else if ( propertyName.equals( CollectionPropertyNames.COLLECTION_INDICES ) ) {
return queryableCollection.getIndexColumnNames( alias );
}
else {
throw new IllegalArgumentException(
String.format(
"Collection propertyName must be either %s or %s; instead it was %s.",
CollectionPropertyNames.COLLECTION_ELEMENTS,
CollectionPropertyNames.COLLECTION_INDICES,
propertyName
)
);
}
}
@Override
public void addJoin(Join join) {
if ( JoinDefinedByMetadata.class.isInstance( join ) ) {
final JoinDefinedByMetadata joinDefinedByMetadata = (JoinDefinedByMetadata) join;
if ( joinDefinedByMetadata.getJoinedPropertyName().equals( CollectionPropertyNames.COLLECTION_ELEMENTS ) ) {
if ( elementJoin == null ) {
elementJoin = joinDefinedByMetadata;
}
else {
throw new IllegalStateException( "Attempt to add an element join, but an element join already exists." );
}
}
else if ( joinDefinedByMetadata.getJoinedPropertyName().equals( CollectionPropertyNames.COLLECTION_INDICES ) ) {
if ( indexJoin == null ) {
indexJoin = joinDefinedByMetadata;
}
else {
throw new IllegalStateException( "Attempt to add an index join, but an index join already exists." );
}
}
else {
throw new IllegalArgumentException(
String.format(
"Collection propertyName must be either %s or %s; instead the joined property name was %s.",
CollectionPropertyNames.COLLECTION_ELEMENTS,
CollectionPropertyNames.COLLECTION_INDICES,
joinDefinedByMetadata.getJoinedPropertyName()
)
);
}
}
internalGetJoins().add( join );
}
@Override
public ExpandingQuerySpaces getExpandingQuerySpaces() {
return super.getExpandingQuerySpaces();
}
public void addJoin(JoinDefinedByMetadata join) {
addJoin( (Join) join );
}
}