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ProcedureExecutionResult.scala
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ProcedureExecutionResult.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.executionplan.procs
import java.util
import org.neo4j.cypher.internal.compatibility.v3_3.runtime._
import org.neo4j.cypher.internal.compatibility.v3_3.runtime.executionplan.{InternalQueryType, ProcedureCallMode, StandardInternalExecutionResult}
import org.neo4j.cypher.internal.compatibility.v3_3.runtime.planDescription.InternalPlanDescription
import org.neo4j.cypher.internal.compatibility.v3_3.runtime.planDescription.InternalPlanDescription.Arguments.{Runtime, RuntimeImpl}
import org.neo4j.cypher.internal.frontend.v3_3.ProfilerStatisticsNotReadyException
import org.neo4j.cypher.internal.frontend.v3_3.symbols.{CypherType, _}
import org.neo4j.cypher.internal.spi.v3_3.QueryContext
import org.neo4j.cypher.internal.v3_3.logical.plans.QualifiedName
import org.neo4j.cypher.internal.{InternalExecutionResult, QueryStatistics}
import org.neo4j.cypher.result.QueryResult.{QueryResultVisitor, Record}
import org.neo4j.graphdb.Notification
import org.neo4j.graphdb.spatial.{Geometry, Point}
import org.neo4j.kernel.impl.util.ValueUtils
import org.neo4j.kernel.impl.util.ValueUtils._
import org.neo4j.values.AnyValue
import org.neo4j.values.storable.Values
import org.neo4j.values.storable.Values._
/**
* Execution result of a Procedure
*
* @param context The QueryContext used to communicate with the kernel.
* @param taskCloser called when done with the result, cleans up resources.
* @param name The name of the procedure.
* @param callMode The call mode of the procedure.
* @param args The argument to the procedure.
* @param indexResultNameMappings Describes how values at output row indices are mapped onto result columns.
* @param executionPlanDescriptionGenerator Generator for the plan description of the result.
* @param executionMode The execution mode.
*/
class ProcedureExecutionResult(context: QueryContext,
taskCloser: TaskCloser,
name: QualifiedName,
callMode: ProcedureCallMode,
args: Seq[Any],
indexResultNameMappings: IndexedSeq[(Int, String, CypherType)],
executionPlanDescriptionGenerator: () => InternalPlanDescription,
val executionMode: ExecutionMode)
extends StandardInternalExecutionResult(context, ProcedureRuntimeName, Some(taskCloser)) {
override val fieldNames: Array[String] = indexResultNameMappings.map(_._2).toArray
private final val executionResults = executeCall
// The signature mode is taking care of eagerization
protected def executeCall: Iterator[Array[AnyRef]] = callMode.callProcedure(context, name, args)
override protected def createInner = new util.Iterator[util.Map[String, Any]]() {
override def next(): util.Map[String, Any] =
resultAsMap(executionResults.next()) //TODO!!!¡¡¡¡
/*
override def next(): util.Map[String, Any] =
try { resultAsMap( executionResults.next( ) ) }
catch { case e: NoSuchElementException => success(); throw e }
*/
override def hasNext: Boolean = {
val moreToCome = executionResults.hasNext
if (!moreToCome) {
close()
}
moreToCome
}
}
private def transform[T](value: AnyRef, f: T => AnyValue): AnyValue = {
if (value == null) NO_VALUE
else f(value.asInstanceOf[T])
}
override def accept[EX <: Exception](visitor: QueryResultVisitor[EX]): Unit = {
executionResults.foreach { res =>
val fieldArray = new Array[AnyValue](indexResultNameMappings.size)
for (i <- indexResultNameMappings.indices) {
val mapping = indexResultNameMappings(i)
val pos = mapping._1
fieldArray(i) = mapping._3 match {
case CTNode => transform(res(pos), fromNodeProxy)
case CTRelationship => transform(res(pos), fromRelationshipProxy)
case CTPath => transform(res(pos), asPathValue)
case CTInteger => transform(res(pos), longValue)
case CTFloat => transform(res(pos), doubleValue)
case CTNumber => transform(res(pos), numberValue)
case CTString => transform(res(pos), stringValue)
case CTBoolean => transform(res(pos), booleanValue)
case CTPoint => transform(res(pos), (p: Point) => asPointValue(p))
case CTGeometry => transform(res(pos), (g: Geometry) => asPointValue(g))
case CTMap => transform(res(pos), asMapValue)
case ListType(_) => transform(res(pos), asListValue)
case CTAny => transform(res(pos), ValueUtils.of)
}
}
visitor.visit(new Record {
override def fields(): Array[AnyValue] = fieldArray
})
}
close()
}
// TODO Look into having the kernel track updates, rather than cypher middle-layers, only sensible way I can think
// of to get accurate stats for procedure code
override def queryStatistics(): QueryStatistics = context.getOptStatistics.getOrElse(QueryStatistics())
override def queryType: InternalQueryType = callMode.queryType
private def resultAsMap(rowData: Array[AnyRef]): util.Map[String, Any] = {
val mapData = new util.HashMap[String, Any](rowData.length)
indexResultNameMappings.foreach { entry => mapData.put(entry._2, rowData(entry._1)) }
mapData
}
private def resultAsRefMap(rowData: Array[AnyRef]): util.Map[String, AnyRef] = {
val mapData = new util.HashMap[String, AnyRef](rowData.length)
indexResultNameMappings.foreach { entry => mapData.put(entry._2, rowData(entry._1)) }
mapData
}
override def executionPlanDescription(): InternalPlanDescription = executionMode match {
case ProfileMode if executionResults.hasNext =>
completed(success = false)
throw new ProfilerStatisticsNotReadyException()
case _ => executionPlanDescriptionGenerator()
.addArgument(Runtime(ProcedureRuntimeName.toTextOutput))
.addArgument(RuntimeImpl(ProcedureRuntimeName.toTextOutput))
}
override def withNotifications(notification: Notification*): InternalExecutionResult = this
}