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.registry;
  
  import au.csiro.pathling.fhirpath.function.MethodDefinedFunction;
  import au.csiro.pathling.fhirpath.function.NamedFunction;
  import au.csiro.pathling.fhirpath.function.provider.BooleanLogicFunctions;
  import au.csiro.pathling.fhirpath.function.provider.ExistenceFunctions;
  import au.csiro.pathling.fhirpath.function.provider.FhirFunctions;
  import au.csiro.pathling.fhirpath.function.provider.FilteringAndProjectionFunctions;
  import au.csiro.pathling.fhirpath.function.provider.JoinKeyFunctions;
  import au.csiro.pathling.fhirpath.function.provider.StringFunctions;
  import au.csiro.pathling.fhirpath.function.provider.SubsettingFunctions;
  import au.csiro.pathling.fhirpath.function.provider.TerminologyFunctions;
  import com.google.common.collect.ImmutableMap.Builder;
  
  /**
   * A static registry of FHIRPath function implementations, for use in environments where dependency
   * injection is not available.
   *
   * @author John Grimes
   */
  public class StaticFunctionRegistry extends InMemoryFunctionRegistry {
  
  
    private static final StaticFunctionRegistry INSTANCE = new StaticFunctionRegistry();
  
    /**
     * Constructs a new instance of the registry, populating it with the standard set of functions.
     */
    public StaticFunctionRegistry() {
      super(new Builder<String, NamedFunction>()
          .putAll(MethodDefinedFunction.mapOf(BooleanLogicFunctions.class))
          .putAll(MethodDefinedFunction.mapOf(ExistenceFunctions.class))
          .putAll(MethodDefinedFunction.mapOf(FhirFunctions.class))
          .putAll(MethodDefinedFunction.mapOf(FilteringAndProjectionFunctions.class))
          .putAll(MethodDefinedFunction.mapOf(JoinKeyFunctions.class))
          .putAll(MethodDefinedFunction.mapOf(StringFunctions.class))
          .putAll(MethodDefinedFunction.mapOf(SubsettingFunctions.class))
          .putAll(MethodDefinedFunction.mapOf(TerminologyFunctions.class))
          .build());
    }
  
    /**
     * @return The singleton instance of the registry
     */
    public static StaticFunctionRegistry getInstance() {
      return INSTANCE;
    }
  
  }
  