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Add.scala
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Add.scala
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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.runtime.interpreted.commands.expressions
import org.neo4j.cypher.internal.runtime.interpreted.pipes.QueryState
import org.neo4j.cypher.internal.runtime.interpreted.{ExecutionContext, IsList}
import org.opencypher.v9_0.util.CypherTypeException
import org.opencypher.v9_0.util.symbols._
import org.neo4j.values._
import org.neo4j.values.storable.{UTF8StringValue, _}
import org.neo4j.values.utils.UTF8Utils
import org.neo4j.values.virtual.VirtualValues
case class Add(a: Expression, b: Expression) extends Expression {
def apply(ctx: ExecutionContext, state: QueryState): AnyValue = {
val aVal = a(ctx, state)
val bVal = b(ctx, state)
(aVal, bVal) match {
case (x, y) if x == Values.NO_VALUE || y == Values.NO_VALUE => Values.NO_VALUE
case (x: NumberValue, y: NumberValue) => x.plus(y)
case (x: UTF8StringValue, y: UTF8StringValue) => UTF8Utils.add(x, y)
case (x: TextValue, y: TextValue) => Values.stringValue(x.stringValue() + y.stringValue())
case (IsList(x), IsList(y)) => VirtualValues.concat(x, y)
case (IsList(x), y) => x.append(y)
case (x, IsList(y)) => y.prepend(x)
case (x: TextValue, y: IntegralValue) => Values.stringValue(x.stringValue() + y.longValue())
case (x: IntegralValue, y: TextValue) => Values.stringValue(x.longValue() + y.stringValue())
case (x: TextValue, y: FloatValue) => Values.stringValue(x.stringValue() + y.doubleValue())
case (x: FloatValue, y: TextValue) => Values.stringValue(x.doubleValue() + y.stringValue())
case (x: TemporalValue[_,_], y: DurationValue) => x.plus(y)
case (x: DurationValue, y: TemporalValue[_,_]) => y.plus(x)
case (x: DurationValue, y: DurationValue) => x.add(y)
case _ => throw new CypherTypeException("Don't know how to add `" + aVal.toString + "` and `" + bVal.toString + "`")
}
}
def rewrite(f: (Expression) => Expression) = f(Add(a.rewrite(f), b.rewrite(f)))
def arguments = Seq(a, b)
def symbolTableDependencies = a.symbolTableDependencies ++ b.symbolTableDependencies
}