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normalizedEqualsArguments.scala
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normalizedEqualsArguments.scala
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.cypher.internal.compiler.v3_1.ast.conditions
import org.neo4j.cypher.internal.compiler.v3_1.tracing.rewriters.Condition
import org.neo4j.cypher.internal.frontend.v3_1.ast.{Equals, Expression, Property, UserFunctionInvocation, functions}
case object normalizedEqualsArguments extends Condition {
def apply(that: Any): Seq[String] = {
val equals = collectNodesOfType[Equals].apply(that)
equals.collect {
case eq@Equals(expr, Property(_,_)) if !expr.isInstanceOf[Property] && notIdFunction(expr) =>
s"Equals at ${eq.position} is not normalized: $eq"
case eq@Equals(expr, func@UserFunctionInvocation(_, _, _, _)) if isIdFunction(func) && notIdFunction(expr) =>
s"Equals at ${eq.position} is not normalized: $eq"
}
}
private def isIdFunction(func: UserFunctionInvocation) = func.function == functions.Id
private def notIdFunction(expr: Expression) =
!expr.isInstanceOf[UserFunctionInvocation] || !isIdFunction(expr.asInstanceOf[UserFunctionInvocation])
override def name: String = productPrefix
}