001package ca.uhn.fhir.context;
002
003/*
004 * #%L
005 * HAPI FHIR - Core Library
006 * %%
007 * Copyright (C) 2014 - 2016 University Health Network
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<?> myEnumerationType;
034
035        public RuntimeChildPrimitiveEnumerationDatatypeDefinition(Field theField, String theElementName, Child theChildAnnotation, Description theDescriptionAnnotation,  Class<? extends IBase> theDatatype, Class<?> theBinderType) {
036                super(theField, theElementName, theDescriptionAnnotation, theChildAnnotation, theDatatype);
037
038                myEnumerationType = theBinderType;
039        }
040
041        @Override
042        public Object getInstanceConstructorArguments() {
043                Object retVal = myBinder;
044                if (retVal == null) {
045                        retVal = toEnumFactory(myEnumerationType);
046                        myBinder = retVal;
047                }
048                return retVal;
049        }
050
051        static Object toEnumFactory(Class<?> theEnumerationType) {
052                Class<?> clazz;
053                String className = theEnumerationType.getName() + "EnumFactory";
054                Object retVal;
055                try {
056                        clazz = Class.forName(className);
057                        retVal = clazz.newInstance();
058                } catch (Exception e) {
059                        throw new ConfigurationException("Failed to instantiate " + className, e);
060                }
061                return retVal;
062        }
063
064}