org.neo4j.cypher.internal.expressions.functions.IsEmpty.scala Maven / Gradle / Ivy

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.neo4j.cypher.internal.expressions.functions

import org.neo4j.cypher.internal.expressions.FunctionTypeSignature
import org.neo4j.cypher.internal.util.InputPosition
import org.neo4j.cypher.internal.util.symbols.CTAny
import org.neo4j.cypher.internal.util.symbols.CTBoolean
import org.neo4j.cypher.internal.util.symbols.CTList
import org.neo4j.cypher.internal.util.symbols.CTMap
import org.neo4j.cypher.internal.util.symbols.CTString
import org.neo4j.cypher.internal.util.symbols.ClosedDynamicUnionType

case object IsEmpty extends Function {
  val name = "isEmpty"

  override val signatures = Vector(
    FunctionTypeSignature(
      this,
      ClosedDynamicUnionType(Set(CTString, CTList(CTAny), CTMap))(InputPosition.NONE),
      CTBoolean,
      "Checks whether a `STRING`, `MAP` or `LIST` is empty.",
      Category.PREDICATE
    )
  )
}