/*
*
* * Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
* *
* * Licensed under the Apache License, Version 2.0 (the "License");
* * you may not use this file except in compliance with the License.
* * You may obtain a copy of the License at
* *
* * http://www.apache.org/licenses/LICENSE-2.0
* *
* * Unless required by applicable law or agreed to in writing, software
* * distributed under the License is distributed on an "AS IS" BASIS,
* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* * See the License for the specific language governing permissions and
* * limitations under the License.
* *
* * For more information: http://www.orientechnologies.com
*
*/
package com.orientechnologies.orient.core.sql.operator;
import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.db.ODatabaseRecordThreadLocal;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.exception.OCommandExecutionException;
import com.orientechnologies.orient.core.id.ORID;
import com.orientechnologies.orient.core.metadata.schema.OClass;
import com.orientechnologies.orient.core.metadata.schema.OSchema;
import com.orientechnologies.orient.core.record.ORecord;
import com.orientechnologies.orient.core.record.impl.ODocument;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterCondition;
/**
* EQUALS operator.
*
* @author Luca Garulli
*
*/
public class OQueryOperatorInstanceof extends OQueryOperatorEqualityNotNulls {
public OQueryOperatorInstanceof() {
super("INSTANCEOF", 5, false);
}
@Override
protected boolean evaluateExpression(final OIdentifiable iRecord, final OSQLFilterCondition iCondition, final Object iLeft,
final Object iRight, OCommandContext iContext) {
final OSchema schema = ODatabaseRecordThreadLocal.INSTANCE.get().getMetadata().getSchema();
final String baseClassName = iRight.toString();
final OClass baseClass = schema.getClass(baseClassName);
if (baseClass == null)
throw new OCommandExecutionException("Class '" + baseClassName + "' is not defined in database schema");
OClass cls = null;
if (iLeft instanceof OIdentifiable) {
// GET THE RECORD'S CLASS
final ORecord record = ((OIdentifiable) iLeft).getRecord();
if (record instanceof ODocument) {
cls = ((ODocument) record).getSchemaClass();
}
} else if (iLeft instanceof String)
// GET THE CLASS BY NAME
cls = schema.getClass((String) iLeft);
return cls != null ? cls.isSubClassOf(baseClass) : false;
}
@Override
public OIndexReuseType getIndexReuseType(final Object iLeft, final Object iRight) {
return OIndexReuseType.NO_INDEX;
}
@Override
public ORID getBeginRidRange(Object iLeft, Object iRight) {
return null;
}
@Override
public ORID getEndRidRange(Object iLeft, Object iRight) {
return null;
}
}