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QueryStateHelper.scala
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QueryStateHelper.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.compiler.v3_2
import java.util.Collections
import org.neo4j.cypher.internal.compiler.v3_2.pipes.{ExternalCSVResource, NullPipeDecorator, PipeDecorator, QueryState}
import org.neo4j.cypher.internal.compiler.v3_2.spi.{QueryContext, UpdateCountingQueryContext}
import org.neo4j.cypher.internal.spi.v3_2.{TransactionBoundQueryContext, TransactionalContextWrapper}
import org.neo4j.cypher.internal.spi.v3_2.TransactionBoundQueryContext.IndexSearchMonitor
import org.neo4j.kernel.GraphDatabaseQueryService
import org.neo4j.kernel.impl.coreapi.{InternalTransaction, PropertyContainerLocker}
import org.neo4j.kernel.impl.query.Neo4jTransactionalContextFactory
import org.neo4j.kernel.impl.query.clientconnection.ClientConnectionInfo
import org.neo4j.kernel.monitoring.{Monitors => KernelMonitors}
import scala.collection.mutable
object QueryStateHelper {
def empty: QueryState = newWith()
def newWith(db: GraphDatabaseQueryService = null, query: QueryContext = null, resources: ExternalCSVResource = null,
params: Map[String, Any] = Map.empty, decorator: PipeDecorator = NullPipeDecorator) =
new QueryState(query = query, resources = resources, params = params, decorator = decorator, triadicState = mutable.Map.empty, repeatableReads = mutable.Map.empty)
private val locker: PropertyContainerLocker = new PropertyContainerLocker
def queryStateFrom(db: GraphDatabaseQueryService, tx: InternalTransaction, params: Map[String, Any] = Map.empty): QueryState = {
val searchMonitor = new KernelMonitors().newMonitor(classOf[IndexSearchMonitor])
val contextFactory = Neo4jTransactionalContextFactory.create(db, locker)
val transactionalContext = TransactionalContextWrapper(contextFactory.newContext(ClientConnectionInfo.EMBEDDED_CONNECTION, tx, "X", Collections.emptyMap()))
val queryContext = new TransactionBoundQueryContext(transactionalContext)(searchMonitor)
newWith(db = db, query = queryContext, params = params)
}
def countStats(q: QueryState) = q.withQueryContext(query = new UpdateCountingQueryContext(q.query))
}