/*
*
* * 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.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.record.impl.ODocument;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterCondition;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
/**
* CONTAINS operator.
*
* @author Luca Garulli
*
*/
public class OQueryOperatorContains extends OQueryOperatorEqualityNotNulls {
public OQueryOperatorContains() {
super("CONTAINS", 5, false);
}
@Override
@SuppressWarnings("unchecked")
protected boolean evaluateExpression(final OIdentifiable iRecord, final OSQLFilterCondition iCondition, final Object iLeft,
final Object iRight, OCommandContext iContext) {
final OSQLFilterCondition condition;
if (iCondition.getLeft() instanceof OSQLFilterCondition)
condition = (OSQLFilterCondition) iCondition.getLeft();
else if (iCondition.getRight() instanceof OSQLFilterCondition)
condition = (OSQLFilterCondition) iCondition.getRight();
else
condition = null;
if (iLeft instanceof Iterable<?>) {
final Iterable<Object> iterable = (Iterable<Object>) iLeft;
if (condition != null) {
// CHECK AGAINST A CONDITION
for (final Object o : iterable) {
final OIdentifiable id;
if (o instanceof OIdentifiable)
id = (OIdentifiable) o;
else if (o instanceof Map<?, ?>) {
final Iterator<Object> iter = ((Map<?, Object>) o).values().iterator();
final Object v = iter.hasNext() ? iter.next() : null;
if (v instanceof OIdentifiable)
id = (OIdentifiable) v;
else
// TRANSFORM THE ENTIRE MAP IN A DOCUMENT. PROBABLY HAS BEEN IMPORTED FROM JSON
id = new ODocument((Map) o);
} else if (o instanceof Iterable<?>) {
final Iterator<OIdentifiable> iter = ((Iterable<OIdentifiable>) o).iterator();
id = iter.hasNext() ? iter.next() : null;
} else
continue;
if ((Boolean) condition.evaluate(id, null, iContext) == Boolean.TRUE)
return true;
}
} else {
// CHECK AGAINST A SINGLE VALUE
for (final Object o : iterable) {
if (OQueryOperatorEquals.equals(iRight, o))
return true;
}
}
} else if (iRight instanceof Iterable<?>) {
// CHECK AGAINST A CONDITION
final Iterable<OIdentifiable> iterable = (Iterable<OIdentifiable>) iRight;
if (condition != null) {
for (final OIdentifiable o : iterable) {
if ((Boolean) condition.evaluate(o, null, iContext) == Boolean.TRUE)
return true;
}
} else {
// CHECK AGAINST A SINGLE VALUE
for (final Object o : iterable) {
if (OQueryOperatorEquals.equals(iLeft, o))
return true;
}
}
}
return false;
}
@Override
public OIndexReuseType getIndexReuseType(final Object iLeft, final Object iRight) {
if (!(iLeft instanceof OSQLFilterCondition) && !(iRight instanceof OSQLFilterCondition))
return OIndexReuseType.INDEX_METHOD;
return OIndexReuseType.NO_INDEX;
}
@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())
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;
final Object indexResult;
indexResult = index.get(key);
if (indexResult == null || indexResult instanceof OIdentifiable)
cursor = new OIndexCursorSingleValue((OIdentifiable) indexResult, key);
else
cursor = new OIndexCursorCollectionValue(((Collection<OIdentifiable>) indexResult).iterator(), key);
} else {
// in case of composite keys several items can be returned in case of we perform search
// using part of composite key stored in index.
final OCompositeIndexDefinition compositeIndexDefinition = (OCompositeIndexDefinition) indexDefinition;
final Object keyOne = compositeIndexDefinition.createSingleValue(keyParams);
if (keyOne == null)
return null;
final Object keyTwo = compositeIndexDefinition.createSingleValue(keyParams);
if (internalIndex.hasRangeQuerySupport()) {
cursor = index.iterateEntriesBetween(keyOne, true, keyTwo, true, ascSortOrder);
} else {
int indexParamCount = indexDefinition.getParamCount();
if (indexParamCount == keyParams.size()) {
final Object indexResult;
indexResult = index.get(keyOne);
if (indexResult == null || indexResult instanceof OIdentifiable)
cursor = new OIndexCursorSingleValue((OIdentifiable) indexResult, keyOne);
else
cursor = new OIndexCursorCollectionValue(((Collection<OIdentifiable>) indexResult).iterator(), keyOne);
} else
return null;
}
}
updateProfiler(iContext, index, keyParams, indexDefinition);
return cursor;
}
@Override
public ORID getBeginRidRange(Object iLeft, Object iRight) {
return null;
}
@Override
public ORID getEndRidRange(Object iLeft, Object iRight) {
return null;
}
}