001package ca.uhn.fhir.context;
002
003/*
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2021 Smile CDR, Inc.
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import java.lang.reflect.Field;
024
025import org.hl7.fhir.instance.model.api.IBase;
026
027import ca.uhn.fhir.model.api.annotation.Child;
028import ca.uhn.fhir.model.api.annotation.Description;
029
030public class RuntimeChildPrimitiveEnumerationDatatypeDefinition extends RuntimeChildPrimitiveDatatypeDefinition {
031
032        private Object myBinder;
033        private Class<? extends Enum<?>> myEnumType;
034
035        public RuntimeChildPrimitiveEnumerationDatatypeDefinition(Field theField, String theElementName, Child theChildAnnotation, Description theDescriptionAnnotation,  Class<? extends IBase> theDatatype, Class<? extends Enum<?>> theBinderType) {
036                super(theField, theElementName, theDescriptionAnnotation, theChildAnnotation, theDatatype);
037
038                myEnumType = theBinderType;
039        }
040
041        @Override
042        public Class<? extends Enum<?>> getBoundEnumType() {
043                return myEnumType;
044        }
045
046        @Override
047        public Object getInstanceConstructorArguments() {
048                Object retVal = myBinder;
049                if (retVal == null) {
050                        retVal = toEnumFactory(myEnumType);
051                        myBinder = retVal;
052                }
053                return retVal;
054        }
055
056        static Object toEnumFactory(Class<?> theEnumerationType) {
057                Class<?> clazz;
058                String className = theEnumerationType.getName() + "EnumFactory";
059                Object retVal;
060                try {
061                        clazz = Class.forName(className);
062                        retVal = clazz.newInstance();
063                } catch (Exception e) {
064                        throw new ConfigurationException("Failed to instantiate " + className, e);
065                }
066                return retVal;
067        }
068
069}