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.path;
  
  import au.csiro.pathling.fhirpath.EvaluationContext;
  import au.csiro.pathling.fhirpath.FhirPath;
  import au.csiro.pathling.fhirpath.TypeSpecifier;
  import au.csiro.pathling.fhirpath.collection.Collection;
  import jakarta.annotation.Nonnull;
  import lombok.Value;
  import lombok.experimental.UtilityClass;
  
  /**
   * Helper FhirPath classes for the FHIRPath parser.
   */
  @UtilityClass
  public class ParserPaths {
  
  
    /**
     * Special path used to pass values between visitor in the FHIRPath parser.
     */
    public interface ValuePath<T> extends FhirPath {
  
      /**
       * @return the value of this path
       */
      T getValue();
  
      /**
       * {@inheritDoc}
       */
      @Override
      default Collection apply(@Nonnull final Collection input,
          @Nonnull final EvaluationContext context) {
        throw new UnsupportedOperationException("ValuePath cannot be evaluated directly");
      }
  
      @Override
      @Nonnull
      default String toExpression() {
        return getValue().toString();
      }
    }
  
    /**
     * FHIRPath expression with a type specifier value.
     */
    @Value
    public static class TypeSpecifierPath implements ValuePath<TypeSpecifier> {
  
      TypeSpecifier value;
    }
  
    /**
     * FHIRPath expression with a type namespace value.
     */
    @Value
    public static class TypeNamespacePath implements ValuePath<String> {
  
      String value;
    }
  }
  