org.neo4j.cypher.internal.runtime.interpreted.MutableMaps.scala Maven / Gradle / Ivy

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The traditional cypher interpreted runtime

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/*
 * Copyright (c) 2002-2020 "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 .
 */
package org.neo4j.cypher.internal.runtime.interpreted

object MutableMaps {

  def create[KEY, VALUE](size: Int) : collection.mutable.Map[KEY, VALUE] =
    new collection.mutable.OpenHashMap[KEY, VALUE](if (size < 16) 16 else size)

  def empty[KEY, VALUE]: collection.mutable.Map[KEY, VALUE] = create(16)

  def create[KEY, VALUE](input: scala.collection.Map[KEY, VALUE]) : collection.mutable.Map[KEY, VALUE] =
    create(input.size) ++= input

  def create[KEY, VALUE](input: (KEY, VALUE)*) : collection.mutable.Map[KEY, VALUE] = {
    create(input.size) ++= input
  }
}