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Divide.scala
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Divide.scala
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/*
* Copyright (c) 2002-2017 "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.compatibility.v3_3.runtime.commands.expressions
import org.neo4j.cypher.internal.compatibility.v3_3.runtime.ExecutionContext
import org.neo4j.cypher.internal.compatibility.v3_3.runtime.pipes.QueryState
import org.neo4j.cypher.internal.frontend.v3_3.ArithmeticException
import org.neo4j.values._
import org.neo4j.values.storable._
case class Divide(a: Expression, b: Expression) extends Arithmetics(a, b) {
def operand = "/"
def verb = "divide"
override def apply(ctx: ExecutionContext)(implicit state: QueryState): AnyValue = {
val aVal = a(ctx)
val bVal = b(ctx)
(aVal, bVal) match {
case (_, l:IntegralValue) if l.longValue() == 0L => throw new ArithmeticException("/ by zero")
case (_, l:DoubleValue) if l.doubleValue() == 0L => throw new ArithmeticException("/ by zero")
case (_, l:FloatValue) if l.doubleValue() == 0L => throw new ArithmeticException("/ by zero")
case (x, y) if x == Values.NO_VALUE || y == Values.NO_VALUE => Values.NO_VALUE
case (x: NumberValue, y: NumberValue) => calc(x, y)
case _ => throwTypeError(bVal, aVal)
}
}
def calc(a: NumberValue, b: NumberValue): AnyValue = divide(a, b)
def rewrite(f: (Expression) => Expression) = f(Divide(a.rewrite(f), b.rewrite(f)))
def symbolTableDependencies = a.symbolTableDependencies ++ b.symbolTableDependencies
}