/*
*
* * 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.collate.OCollate;
import com.orientechnologies.orient.core.command.OCommandContext;
import com.orientechnologies.orient.core.db.record.OIdentifiable;
import com.orientechnologies.orient.core.query.OQueryRuntimeValueMulti;
import com.orientechnologies.orient.core.record.impl.ODocument;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterCondition;
import com.orientechnologies.orient.core.sql.filter.OSQLFilterItemFieldAll;
/**
* Base equality operator. It's an abstract class able to compare the equality between two values.
*
* @author Luca Garulli
*
*/
public abstract class OQueryOperatorEquality extends OQueryOperator {
protected OQueryOperatorEquality(final String iKeyword, final int iPrecedence, final boolean iLogical) {
super(iKeyword, iPrecedence, false);
}
protected OQueryOperatorEquality(final String iKeyword, final int iPrecedence, final boolean iLogical,
final int iExpectedRightWords) {
super(iKeyword, iPrecedence, false, iExpectedRightWords);
}
protected OQueryOperatorEquality(final String iKeyword, final int iPrecedence, final boolean iLogical,
final int iExpectedRightWords, final boolean iExpectsParameters) {
super(iKeyword, iPrecedence, iLogical, iExpectedRightWords, iExpectsParameters);
}
protected abstract boolean evaluateExpression(final OIdentifiable iRecord, final OSQLFilterCondition iCondition,
final Object iLeft, final Object iRight, OCommandContext iContext);
@Override
public Object evaluateRecord(final OIdentifiable iRecord, ODocument iCurrentResult, final OSQLFilterCondition iCondition,
final Object iLeft, final Object iRight, OCommandContext iContext) {
if (iLeft instanceof OQueryRuntimeValueMulti) {
// LEFT = MULTI
final OQueryRuntimeValueMulti left = (OQueryRuntimeValueMulti) iLeft;
if (left.getValues().length == 0)
return false;
if (left.getDefinition().getRoot().startsWith(OSQLFilterItemFieldAll.NAME)) {
// ALL VALUES
for (int i = 0; i < left.getValues().length; ++i) {
Object v = left.getValues()[i];
Object r = iRight;
final OCollate collate = left.getCollate(i);
if (collate != null) {
v = collate.transform(v);
r = collate.transform(iRight);
}
if (v == null || !evaluateExpression(iRecord, iCondition, v, r, iContext))
return false;
}
return true;
} else {
// ANY VALUES
for (int i = 0; i < left.getValues().length; ++i) {
Object v = left.getValues()[i];
Object r = iRight;
final OCollate collate = left.getCollate(i);
if (collate != null) {
v = collate.transform(v);
r = collate.transform(iRight);
}
if (v != null && evaluateExpression(iRecord, iCondition, v, r, iContext))
return true;
}
return false;
}
} else if (iRight instanceof OQueryRuntimeValueMulti) {
// RIGHT = MULTI
final OQueryRuntimeValueMulti right = (OQueryRuntimeValueMulti) iRight;
if (right.getValues().length == 0)
return false;
if (right.getDefinition().getRoot().startsWith(OSQLFilterItemFieldAll.NAME)) {
// ALL VALUES
for (int i = 0; i < right.getValues().length; ++i) {
Object v = right.getValues()[i];
Object l = iLeft;
final OCollate collate = right.getCollate(i);
if (collate != null) {
v = collate.transform(v);
l = collate.transform(iLeft);
}
if (v == null || !evaluateExpression(iRecord, iCondition, l, v, iContext))
return false;
}
return true;
} else {
// ANY VALUES
for (int i = 0; i < right.getValues().length; ++i) {
Object v = right.getValues()[i];
Object l = iLeft;
final OCollate collate = right.getCollate(i);
if (collate != null) {
v = collate.transform(v);
l = collate.transform(iLeft);
}
if (v != null && evaluateExpression(iRecord, iCondition, l, v, iContext))
return true;
}
return false;
}
} else
// SINGLE SIMPLE ITEM
return evaluateExpression(iRecord, iCondition, iLeft, iRight, iContext);
}
}