/*
*
* * 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.ODatabaseDocumentInternal;
import com.orientechnologies.orient.core.db.ODatabaseRecordThreadLocal;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.id.ORID;
import com.orientechnologies.orient.core.id.ORecordId;
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.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.impl.ODocumentHelper;
import com.orientechnologies.orient.core.serialization.serializer.record.binary.OBinaryField;
import com.orientechnologies.orient.core.serialization.serializer.record.binary.ORecordSerializerBinary;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterCondition;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterItemField;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterItemParameter;
import java.util.List;
/**
* MAJOR operator.
*
* @author Luca Garulli
*
*/
public class OQueryOperatorMajor extends OQueryOperatorEqualityNotNulls {
private boolean binaryEvaluate=false;
public OQueryOperatorMajor() {
super(">", 5, false);
ODatabaseDocumentInternal db = ODatabaseRecordThreadLocal.INSTANCE.getIfDefined();
if (db != null)
binaryEvaluate = db.getSerializer().getSupportBinaryEvaluate();
}
@Override
@SuppressWarnings("unchecked")
protected boolean evaluateExpression(final OIdentifiable iRecord, final OSQLFilterCondition iCondition, final Object iLeft,
final Object iRight, OCommandContext iContext) {
final Object right = OType.convert(iRight, iLeft.getClass());
if (right == null)
return false;
return ((Comparable<Object>) iLeft).compareTo(right) > 0;
}
@Override
public OIndexReuseType getIndexReuseType(final Object iLeft, final Object iRight) {
if (iRight == null || iLeft == null)
return OIndexReuseType.NO_INDEX;
return OIndexReuseType.INDEX_METHOD;
}
@Override
public OIndexCursor executeIndexQuery(OCommandContext iContext, OIndex<?> index, List<Object> keyParams, boolean ascSortOrder) {
final OIndexDefinition indexDefinition = index.getDefinition();
OIndexCursor cursor;
final OIndexInternal<?> internalIndex = index.getInternal();
if (!internalIndex.canBeUsedInEqualityOperators() || !internalIndex.hasRangeQuerySupport())
return null;
if (indexDefinition.getParamCount() == 1) {
final Object key;
if (indexDefinition instanceof OIndexDefinitionMultiValue)
key = ((OIndexDefinitionMultiValue) indexDefinition).createSingleValue(keyParams.get(0));
else
key = indexDefinition.createValue(keyParams);
if (key == null)
return null;
cursor = index.iterateEntriesMajor(key, false, ascSortOrder);
} else {
// if we have situation like "field1 = 1 AND field2 > 2"
// then we fetch collection which left not included boundary is the smallest composite key in the
// index that contains keys with values field1=1 and field2=2 and which right included boundary
// is the biggest composite key in the index that contains key with value field1=1.
final OCompositeIndexDefinition compositeIndexDefinition = (OCompositeIndexDefinition) indexDefinition;
final Object keyOne = compositeIndexDefinition.createSingleValue(keyParams);
if (keyOne == null)
return null;
final Object keyTwo = compositeIndexDefinition.createSingleValue(keyParams.subList(0, keyParams.size() - 1));
if (keyTwo == null)
return null;
cursor = index.iterateEntriesBetween(keyOne, false, keyTwo, true, ascSortOrder);
}
updateProfiler(iContext, index, keyParams, indexDefinition);
return cursor;
}
@Override
public ORID getBeginRidRange(final Object iLeft, final Object iRight) {
if (iLeft instanceof OSQLFilterItemField && ODocumentHelper.ATTRIBUTE_RID.equals(((OSQLFilterItemField) iLeft).getRoot()))
if (iRight instanceof ORID)
return new ORecordId(((ORID) iRight).next());
else {
if (iRight instanceof OSQLFilterItemParameter
&& ((OSQLFilterItemParameter) iRight).getValue(null, null, null) instanceof ORID)
return new ORecordId(((ORID) ((OSQLFilterItemParameter) iRight).getValue(null, null, null)).next());
}
return null;
}
@Override
public ORID getEndRidRange(Object iLeft, Object iRight) {
return null;
}
@Override
public boolean evaluate(final OBinaryField iFirstField, final OBinaryField iSecondField, OCommandContext iContext) {
return ORecordSerializerBinary.INSTANCE.getCurrentSerializer().getComparator().compare(iFirstField, iSecondField) > 0;
}
@Override
public boolean isSupportingBinaryEvaluate() {
return binaryEvaluate;
}
}