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Cypher runtime utilities

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://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.ast

import org.neo4j.cypher.internal.ast.prettifier.ExpressionStringifier
import org.neo4j.cypher.internal.expressions.Expression
import org.neo4j.cypher.internal.runtime.ast.MakeTraversable.STRINGIFIER

case class MakeTraversable(e: Expression) extends RuntimeExpression {
  override def isConstantForQuery: Boolean = e.isConstantForQuery

  override def asCanonicalStringVal: String = STRINGIFIER(e)
}

object MakeTraversable {

  val STRINGIFIER: ExpressionStringifier = ExpressionStringifier(
    extensionStringifier = EXTENSION,
    alwaysParens = false,
    alwaysBacktick = false,
    preferSingleQuotes = true,
    sensitiveParamsAsParams = false
  )

  private object EXTENSION extends ExpressionStringifier.Extension {

    override def apply(ctx: ExpressionStringifier)(expression: Expression): String = expression match {
      case MakeTraversable(inner)  => ctx(inner)
      case e if ctx ne STRINGIFIER => ctx(e)
      case e                       => e.asCanonicalStringVal
    }
  }
}