content: /*
   * Copyright © 2018-2025 Commonwealth Scientific and Industrial Research
   * Organisation (CSIRO) ABN 41 687 119 230.
   *
   * 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 au.csiro.pathling.fhirpath.function.provider;
  
  import au.csiro.pathling.fhirpath.annotations.SqlOnFhirConformance;
  import au.csiro.pathling.fhirpath.annotations.SqlOnFhirConformance.Profile;
  import au.csiro.pathling.fhirpath.collection.BooleanCollection;
  import au.csiro.pathling.fhirpath.collection.Collection;
  import au.csiro.pathling.fhirpath.function.FhirPathFunction;
  import jakarta.annotation.Nonnull;
  
  /**
   * Contains functions for boolean logic.
   *
   * @author Piotr Szul
   * @author John Grimes
   * @see <a href="https://build.fhir.org/ig/HL7/FHIRPath/#boolean-logic">FHIRPath Specification -
   * Boolean logic</a>
   */
  public class BooleanLogicFunctions {
  
    private BooleanLogicFunctions() {
    }
  
    /**
     * Returns {@code true} if the input collection evaluates to {@code false}, and {@code false} if
     * it evaluates to {@code true}.
     * <p>
     * Otherwise, the result is empty.
     *
     * @param input The input collection
     * @return A {@link BooleanCollection} containing the negated values
     * @see <a href="https://build.fhir.org/ig/HL7/FHIRPath/#not--boolean">not</a>
     */
    @Nonnull
    @SqlOnFhirConformance(Profile.SHARABLE)
    @FhirPathFunction
    public static BooleanCollection not(@Nonnull final Collection input) {
      return BooleanCollection.build(input.asBooleanSingleton().getColumn().not());
    }
  
  }
  