org.hibernate.persister.collection.CollectionPropertyMapping Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008-2011, 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.persister.collection;
import org.hibernate.QueryException;
import org.hibernate.persister.entity.PropertyMapping;
import org.hibernate.type.StandardBasicTypes;
import org.hibernate.type.Type;
/**
* @author Gavin King
*/
public class CollectionPropertyMapping implements PropertyMapping {
private final QueryableCollection memberPersister;
public CollectionPropertyMapping(QueryableCollection memberPersister) {
this.memberPersister = memberPersister;
}
public Type toType(String propertyName) throws QueryException {
if ( propertyName.equals(CollectionPropertyNames.COLLECTION_ELEMENTS) ) {
return memberPersister.getElementType();
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_INDICES) ) {
if ( !memberPersister.hasIndex() ) throw new QueryException("unindexed collection before indices()");
return memberPersister.getIndexType();
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_SIZE) ) {
return StandardBasicTypes.INTEGER;
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_MAX_INDEX) ) {
return memberPersister.getIndexType();
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_MIN_INDEX) ) {
return memberPersister.getIndexType();
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_MAX_ELEMENT) ) {
return memberPersister.getElementType();
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_MIN_ELEMENT) ) {
return memberPersister.getElementType();
}
else {
//return memberPersister.getPropertyType(propertyName);
throw new QueryException("illegal syntax near collection: " + propertyName);
}
}
public String[] toColumns(String alias, String propertyName) throws QueryException {
if ( propertyName.equals(CollectionPropertyNames.COLLECTION_ELEMENTS) ) {
return memberPersister.getElementColumnNames(alias);
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_INDICES) ) {
if ( !memberPersister.hasIndex() ) throw new QueryException("unindexed collection in indices()");
return memberPersister.getIndexColumnNames(alias);
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_SIZE) ) {
String[] cols = memberPersister.getKeyColumnNames();
return new String[] { "count(" + alias + '.' + cols[0] + ')' };
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_MAX_INDEX) ) {
if ( !memberPersister.hasIndex() ) throw new QueryException("unindexed collection in maxIndex()");
String[] cols = memberPersister.getIndexColumnNames(alias);
if ( cols.length!=1 ) throw new QueryException("composite collection index in maxIndex()");
return new String[] { "max(" + cols[0] + ')' };
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_MIN_INDEX) ) {
if ( !memberPersister.hasIndex() ) throw new QueryException("unindexed collection in minIndex()");
String[] cols = memberPersister.getIndexColumnNames(alias);
if ( cols.length!=1 ) throw new QueryException("composite collection index in minIndex()");
return new String[] { "min(" + cols[0] + ')' };
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_MAX_ELEMENT) ) {
String[] cols = memberPersister.getElementColumnNames(alias);
if ( cols.length!=1 ) throw new QueryException("composite collection element in maxElement()");
return new String[] { "max(" + cols[0] + ')' };
}
else if ( propertyName.equals(CollectionPropertyNames.COLLECTION_MIN_ELEMENT) ) {
String[] cols = memberPersister.getElementColumnNames(alias);
if ( cols.length!=1 ) throw new QueryException("composite collection element in minElement()");
return new String[] { "min(" + cols[0] + ')' };
}
else {
//return memberPersister.toColumns(alias, propertyName);
throw new QueryException("illegal syntax near collection: " + propertyName);
}
}
/**
* Given a property path, return the corresponding column name(s).
*/
public String[] toColumns(String propertyName) throws QueryException, UnsupportedOperationException {
throw new UnsupportedOperationException( "References to collections must be define a SQL alias" );
}
public Type getType() {
//return memberPersister.getType();
return memberPersister.getCollectionType();
}
}