/*
* Hibernate OGM, Domain model persistence for NoSQL datastores
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.ogm.datastore.mongodb.query.parsing.impl;
import java.util.HashMap;
import java.util.Map;
import org.antlr.runtime.tree.Tree;
import org.hibernate.hql.ast.common.JoinType;
import org.hibernate.hql.ast.origin.hql.resolve.path.PathedPropertyReference;
import org.hibernate.hql.ast.origin.hql.resolve.path.PathedPropertyReferenceSource;
import org.hibernate.hql.ast.origin.hql.resolve.path.PropertyPath;
import org.hibernate.hql.ast.spi.QueryResolverDelegate;
/**
* Query resolver delegate targeting MongoDB queries. Very basic implementation atm., need to decide on
* type checks, validation etc.
*
* @author Gunnar Morling
*
*/
public class MongoDBQueryResolverDelegate implements QueryResolverDelegate {
/**
* Persister space: keep track of aliases and entity names.
*/
private final Map<String, String> aliasToEntityType = new HashMap<String, String>();
@Override
public void registerPersisterSpace(Tree entityName, Tree alias) {
String put = aliasToEntityType.put( alias.getText(), entityName.getText() );
if ( put != null && !put.equalsIgnoreCase( entityName.getText() ) ) {
throw new UnsupportedOperationException(
"Alias reuse currently not supported: alias " + alias.getText()
+ " already assigned to type " + put );
}
}
@Override
public boolean isUnqualifiedPropertyReference() {
return true;
}
@Override
public PathedPropertyReferenceSource normalizeUnqualifiedPropertyReference(Tree property) {
if ( aliasToEntityType.containsKey( property.getText() ) ) {
return new PathedPropertyReference( property.getText(), null, true );
}
else {
return new PathedPropertyReference( property.getText(), null, false );
}
}
@Override
public boolean isPersisterReferenceAlias() {
return true;
}
@Override
public PathedPropertyReferenceSource normalizeUnqualifiedRoot(Tree identifier382) {
throw new UnsupportedOperationException( "Not implemented yet" );
}
@Override
public PathedPropertyReferenceSource normalizeQualifiedRoot(Tree identifier381) {
return new PathedPropertyReference( identifier381.getText(), null, true );
}
@Override
public PathedPropertyReferenceSource normalizePropertyPathIntermediary(PropertyPath path, Tree propertyName) {
return new PathedPropertyReference( propertyName.getText(), null, false );
}
@Override
public PathedPropertyReferenceSource normalizeIntermediateIndexOperation(PathedPropertyReferenceSource propertyReferenceSource, Tree collectionProperty,
Tree selector) {
throw new UnsupportedOperationException( "Not implemented yet" );
}
@Override
public void normalizeTerminalIndexOperation(PathedPropertyReferenceSource propertyReferenceSource, Tree collectionProperty, Tree selector) {
throw new UnsupportedOperationException( "Not implemented yet" );
}
@Override
public PathedPropertyReferenceSource normalizeUnqualifiedPropertyReferenceSource(Tree identifier394) {
throw new UnsupportedOperationException( "Not implemented yet" );
}
@Override
public PathedPropertyReferenceSource normalizePropertyPathTerminus(PropertyPath path, Tree propertyNameNode) {
return new PathedPropertyReference( propertyNameNode.getText(), null, false );
}
@Override
public void pushFromStrategy(JoinType joinType, Tree assosiationFetchTree, Tree propertyFetchTree, Tree alias) {
throw new UnsupportedOperationException( "Not implemented yet" );
}
@Override
public void pushSelectStrategy() {
//nothing to do
}
@Override
public void popStrategy() {
//nothing to do
}
@Override
public void propertyPathCompleted(PropertyPath path) {
//nothing to do
}
}