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/*
*
* * 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 java.util.Collection;
import java.util.List;
import com.orientechnologies.common.collection.OMultiValue;
import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.id.ORID;
import com.orientechnologies.orient.core.index.OCompositeIndexDefinition;
import com.orientechnologies.orient.core.index.OIndex;
import com.orientechnologies.orient.core.index.OIndexCursor;
import com.orientechnologies.orient.core.index.OIndexCursorCollectionValue;
import com.orientechnologies.orient.core.index.OIndexCursorSingleValue;
import com.orientechnologies.orient.core.index.OIndexDefinition;
import com.orientechnologies.orient.core.index.OIndexDefinitionMultiValue;
import com.orientechnologies.orient.core.index.OIndexInternal;
import com.orientechnologies.orient.core.metadata.schema.OType;
import com.orientechnologies.orient.core.record.ORecord;
import com.orientechnologies.orient.core.record.impl.ODocument;
import com.orientechnologies.orient.core.record.impl.ODocumentHelper;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterCondition;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterItemField;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterItemParameter;
/**
* EQUALS operator.
*
* @author Luca Garulli
*
*/
public class OQueryOperatorEquals extends OQueryOperatorEqualityNotNulls {
public OQueryOperatorEquals() {
super("=", 5, false);
}
public static boolean equals(final Object iLeft, final Object iRight) {
if (iLeft == null || iRight == null)
return false;
// RECORD & ORID
if (iLeft instanceof ORecord)
return comparesValues(iRight, (ORecord) iLeft, true);
else if (iRight instanceof ORecord)
return comparesValues(iLeft, (ORecord) iRight, true);
// ALL OTHER CASES
final Object right = OType.convert(iRight, iLeft.getClass());
if (right == null)
return false;
return iLeft.equals(right);
}
protected static boolean comparesValues(final Object iValue, final ORecord iRecord, final boolean iConsiderIn) {
// ORID && RECORD
final ORID other = ((ORecord) iRecord).getIdentity();
if (!other.isPersistent() && iRecord instanceof ODocument) {
// ODOCUMENT AS RESULT OF SUB-QUERY: GET THE FIRST FIELD IF ANY
final String[] firstFieldName = ((ODocument) iRecord).fieldNames();
if (firstFieldName.length > 0) {
Object fieldValue = ((ODocument) iRecord).field(firstFieldName[0]);
if (fieldValue != null) {
if (iConsiderIn && OMultiValue.isMultiValue(fieldValue)) {
for (Object o : OMultiValue.getMultiValueIterable(fieldValue)) {
if (o != null && o.equals(iValue))
return true;
}
}
return fieldValue.equals(iValue);
}
}
return false;
}
return other.equals(iValue);
}
@Override
public OIndexReuseType getIndexReuseType(final Object iLeft, final Object iRight) {
if (iLeft instanceof OIdentifiable && iRight instanceof OIdentifiable)
return OIndexReuseType.NO_INDEX;
if (iRight == null || iLeft == null)
return OIndexReuseType.NO_INDEX;
return OIndexReuseType.INDEX_METHOD;
}
@Override
public OIndexCursor executeIndexQuery(OCommandContext iContext, OIndex index, List