Source code

001package ca.uhn.fhir.context;
002
003import static org.apache.commons.lang3.StringUtils.isNotBlank;
004
005import java.lang.reflect.Field;
006import java.lang.reflect.Modifier;
007
008/*
009 * #%L
010 * HAPI FHIR - Core Library
011 * %%
012 * Copyright (C) 2014 - 2019 University Health Network
013 * %%
014 * Licensed under the Apache License, Version 2.0 (the "License");
015 * you may not use this file except in compliance with the License.
016 * You may obtain a copy of the License at
017 *
018 *      http://www.apache.org/licenses/LICENSE-2.0
019 *
020 * Unless required by applicable law or agreed to in writing, software
021 * distributed under the License is distributed on an "AS IS" BASIS,
022 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
023 * See the License for the specific language governing permissions and
024 * limitations under the License.
025 * #L%
026 */
027
028import java.util.ArrayList;
029import java.util.Collections;
030import java.util.HashMap;
031import java.util.HashSet;
032import java.util.LinkedList;
033import java.util.List;
034import java.util.ListIterator;
035import java.util.Map;
036import java.util.Map.Entry;
037import java.util.Set;
038import java.util.TreeMap;
039import java.util.TreeSet;
040
041import org.hl7.fhir.instance.model.api.IAnyResource;
042import org.hl7.fhir.instance.model.api.IBase;
043import org.hl7.fhir.instance.model.api.IBaseBackboneElement;
044import org.hl7.fhir.instance.model.api.IBaseDatatype;
045import org.hl7.fhir.instance.model.api.IBaseDatatypeElement;
046import org.hl7.fhir.instance.model.api.IBaseEnumeration;
047import org.hl7.fhir.instance.model.api.IBaseExtension;
048import org.hl7.fhir.instance.model.api.IBaseReference;
049import org.hl7.fhir.instance.model.api.IBaseResource;
050import org.hl7.fhir.instance.model.api.ICompositeType;
051import org.hl7.fhir.instance.model.api.INarrative;
052import org.hl7.fhir.instance.model.api.IPrimitiveType;
053
054import ca.uhn.fhir.model.api.IBoundCodeableConcept;
055import ca.uhn.fhir.model.api.IDatatype;
056import ca.uhn.fhir.model.api.IElement;
057import ca.uhn.fhir.model.api.IResource;
058import ca.uhn.fhir.model.api.IResourceBlock;
059import ca.uhn.fhir.model.api.IValueSetEnumBinder;
060import ca.uhn.fhir.model.api.annotation.Binding;
061import ca.uhn.fhir.model.api.annotation.Child;
062import ca.uhn.fhir.model.api.annotation.ChildOrder;
063import ca.uhn.fhir.model.api.annotation.Description;
064import ca.uhn.fhir.model.api.annotation.Extension;
065import ca.uhn.fhir.model.base.composite.BaseContainedDt;
066import ca.uhn.fhir.model.base.composite.BaseNarrativeDt;
067import ca.uhn.fhir.model.base.composite.BaseResourceReferenceDt;
068import ca.uhn.fhir.model.primitive.BoundCodeDt;
069import ca.uhn.fhir.parser.DataFormatException;
070import ca.uhn.fhir.util.ReflectionUtil;
071
072public abstract class BaseRuntimeElementCompositeDefinition<T extends IBase> extends BaseRuntimeElementDefinition<T> {
073
074        private static final org.slf4j.Logger ourLog = org.slf4j.LoggerFactory.getLogger(BaseRuntimeElementCompositeDefinition.class);
075        private Map<String, Integer> forcedOrder = null;
076        private List<BaseRuntimeChildDefinition> myChildren = new ArrayList<>();
077        private List<BaseRuntimeChildDefinition> myChildrenAndExtensions;
078        private Map<Class<? extends IBase>, BaseRuntimeElementDefinition<?>> myClassToElementDefinitions;
079        private final FhirContext myContext;
080        private Map<String, BaseRuntimeChildDefinition> myNameToChild = new HashMap<>();
081        private List<ScannedField> myScannedFields = new ArrayList<>();
082        private volatile boolean mySealed;
083
084        @SuppressWarnings("unchecked")
085        public BaseRuntimeElementCompositeDefinition(String theName, Class<? extends T> theImplementingClass, boolean theStandardType, FhirContext theContext, Map<Class<? extends IBase>, BaseRuntimeElementDefinition<?>> theClassToElementDefinitions) {
086                super(theName, theImplementingClass, theStandardType);
087                
088                myContext = theContext;
089                myClassToElementDefinitions = theClassToElementDefinitions;
090                
091                /*
092                 * We scan classes for annotated fields in the class but also all of its superclasses
093                 */
094                Class<? extends IBase> current = theImplementingClass;
095                LinkedList<Class<? extends IBase>> classes = new LinkedList<>();
096                do {
097                        if (forcedOrder == null) {
098                                ChildOrder childOrder = current.getAnnotation(ChildOrder.class);
099                                if (childOrder != null) {
100                                        forcedOrder = new HashMap<>();
101                                        for (int i = 0; i < childOrder.names().length; i++) {
102                                                String nextName = childOrder.names()[i];
103                                                if (nextName.endsWith("[x]")) {
104                                                        nextName = nextName.substring(0, nextName.length() - 3);
105                                                }
106                                                forcedOrder.put(nextName, i);
107                                        }
108                                }
109                        }
110                        classes .push(current);
111                        if (IBase.class.isAssignableFrom(current.getSuperclass())) {
112                                current = (Class<? extends IBase>) current.getSuperclass();
113                        } else {
114                                current = null;
115                        }
116                } while (current != null);
117
118                Set<Field> fields = new HashSet<>();
119                for (Class<? extends IBase> nextClass : classes) {
120                        int fieldIndexInClass = 0;
121                        for (Field next : nextClass.getDeclaredFields()) {
122                                if (fields.add(next)) {
123                                        ScannedField scannedField = new ScannedField(next, theImplementingClass, fieldIndexInClass == 0);
124                                        if (scannedField.getChildAnnotation() != null) {
125                                                myScannedFields.add(scannedField);
126                                                fieldIndexInClass++;
127                                        }
128                                }
129                        }
130                }
131
132        }
133
134        void addChild(BaseRuntimeChildDefinition theNext) {
135                if (theNext == null) {
136                        throw new NullPointerException();
137                }
138                if (theNext.getExtensionUrl() != null) {
139                        throw new IllegalArgumentException("Shouldn't haven an extension URL, use addExtension instead");
140                }
141                myChildren.add(theNext);
142        }
143
144        public BaseRuntimeChildDefinition getChildByName(String theName){
145                validateSealed();
146                BaseRuntimeChildDefinition retVal = myNameToChild.get(theName);
147                return retVal;
148        }
149
150        public BaseRuntimeChildDefinition getChildByNameOrThrowDataFormatException(String theName) throws DataFormatException {
151                validateSealed();
152                BaseRuntimeChildDefinition retVal = myNameToChild.get(theName);
153                if (retVal == null) {
154                        throw new DataFormatException("Unknown child name '" + theName + "' in element " + getName() + " - Valid names are: " + new TreeSet<String>(myNameToChild.keySet()));
155                }
156                return retVal;
157        }
158
159        public List<BaseRuntimeChildDefinition> getChildren() {
160                validateSealed();
161                return myChildren;
162        }
163        
164        
165        public List<BaseRuntimeChildDefinition> getChildrenAndExtension() {
166                validateSealed();
167                return myChildrenAndExtensions;
168        }
169
170
171        /**
172         * Has this class been sealed
173         */
174        public boolean isSealed() {
175                return mySealed;
176        }
177
178        @SuppressWarnings("unchecked")
179        void populateScanAlso(Set<Class<? extends IBase>> theScanAlso) {
180                for (ScannedField next : myScannedFields) {
181                        if (IBase.class.isAssignableFrom(next.getElementType())) {
182                                if (next.getElementType().isInterface() == false && Modifier.isAbstract(next.getElementType().getModifiers()) == false) {
183                                        theScanAlso.add((Class<? extends IBase>) next.getElementType());
184                                }
185                        }
186                        for (Class<? extends IBase> nextChildType : next.getChoiceTypes()) {
187                                if (nextChildType.isInterface() == false && Modifier.isAbstract(nextChildType.getModifiers()) == false) {
188                                        theScanAlso.add(nextChildType);
189                                }
190                        }
191                }
192        }
193        
194        private void scanCompositeElementForChildren() {
195                Set<String> elementNames = new HashSet<>();
196                TreeMap<Integer, BaseRuntimeDeclaredChildDefinition> orderToElementDef = new TreeMap<>();
197                TreeMap<Integer, BaseRuntimeDeclaredChildDefinition> orderToExtensionDef = new TreeMap<>();
198
199                scanCompositeElementForChildren(elementNames, orderToElementDef, orderToExtensionDef);
200
201                if (forcedOrder != null) {
202                        /* 
203                         * Find out how many elements don't match any entry in the list
204                         * for forced order. Those elements come first.
205                         */
206                        TreeMap<Integer, BaseRuntimeDeclaredChildDefinition> newOrderToExtensionDef = new TreeMap<>();
207                        int unknownCount = 0;
208                        for (BaseRuntimeDeclaredChildDefinition nextEntry : orderToElementDef.values()) {
209                                if (!forcedOrder.containsKey(nextEntry.getElementName())) {
210                                        newOrderToExtensionDef.put(unknownCount, nextEntry);
211                                        unknownCount++;
212                                }
213                        }
214                        for (BaseRuntimeDeclaredChildDefinition nextEntry : orderToElementDef.values()) {
215                                if (forcedOrder.containsKey(nextEntry.getElementName())) {
216                                        Integer newOrder = forcedOrder.get(nextEntry.getElementName());
217                                        newOrderToExtensionDef.put(newOrder + unknownCount, nextEntry);
218                                }
219                        }
220                        orderToElementDef = newOrderToExtensionDef;
221                }
222                
223                TreeSet<Integer> orders = new TreeSet<>();
224                orders.addAll(orderToElementDef.keySet());
225                orders.addAll(orderToExtensionDef.keySet());
226
227                for (Integer i : orders) {
228                        BaseRuntimeChildDefinition nextChild = orderToElementDef.get(i);
229                        if (nextChild != null) {
230                                this.addChild(nextChild);
231                        }
232                        BaseRuntimeDeclaredChildDefinition nextExt = orderToExtensionDef.get(i);
233                        if (nextExt != null) {
234                                this.addExtension((RuntimeChildDeclaredExtensionDefinition) nextExt);
235                        }
236                }
237
238        }
239        
240        @SuppressWarnings("unchecked")
241        private void scanCompositeElementForChildren(Set<String> elementNames, TreeMap<Integer, BaseRuntimeDeclaredChildDefinition> theOrderToElementDef,
242                        TreeMap<Integer, BaseRuntimeDeclaredChildDefinition> theOrderToExtensionDef) {
243                int baseElementOrder = 0; 
244
245                for (ScannedField next : myScannedFields) {
246                        if (next.isFirstFieldInNewClass()) {
247                                baseElementOrder = theOrderToElementDef.isEmpty() ? 0 : theOrderToElementDef.lastEntry().getKey() + 1;
248                        }
249                        
250                        Class<?> declaringClass = next.getField().getDeclaringClass(); 
251
252                        Description descriptionAnnotation = ModelScanner.pullAnnotation(next.getField(), Description.class);
253
254                        TreeMap<Integer, BaseRuntimeDeclaredChildDefinition> orderMap = theOrderToElementDef;
255                        Extension extensionAttr = ModelScanner.pullAnnotation(next.getField(), Extension.class);
256                        if (extensionAttr != null) {
257                                orderMap = theOrderToExtensionDef;
258                        }
259
260                        Child childAnnotation = next.getChildAnnotation();
261                        Field nextField = next.getField();
262                        String elementName = childAnnotation.name();
263                        int order = childAnnotation.order();
264                        boolean childIsChoiceType = false;
265                        boolean orderIsReplaceParent = false;
266                        
267                        if (order == Child.REPLACE_PARENT) {
268                                
269                                if (extensionAttr != null) {
270
271                                        for (Entry<Integer, BaseRuntimeDeclaredChildDefinition> nextEntry : orderMap.entrySet()) {
272                                                BaseRuntimeDeclaredChildDefinition nextDef = nextEntry.getValue();
273                                                if (nextDef instanceof RuntimeChildDeclaredExtensionDefinition) {
274                                                        if (nextDef.getExtensionUrl().equals(extensionAttr.url())) {
275                                                                orderIsReplaceParent = true;
276                                                                order = nextEntry.getKey();
277                                                                orderMap.remove(nextEntry.getKey());
278                                                                elementNames.remove(elementName);
279                                                                break;
280                                                        }
281                                                }
282                                        }
283                                        if (order == Child.REPLACE_PARENT) {
284                                                throw new ConfigurationException("Field " + nextField.getName() + "' on target type " + declaringClass.getSimpleName() + " has order() of REPLACE_PARENT (" + Child.REPLACE_PARENT
285                                                                + ") but no parent element with extension URL " + extensionAttr.url() + " could be found on type " + nextField.getDeclaringClass().getSimpleName());
286                                        }
287
288                                } else {
289
290                                        for (Entry<Integer, BaseRuntimeDeclaredChildDefinition> nextEntry : orderMap.entrySet()) {
291                                                BaseRuntimeDeclaredChildDefinition nextDef = nextEntry.getValue();
292                                                if (elementName.equals(nextDef.getElementName())) {
293                                                        orderIsReplaceParent = true;
294                                                        order = nextEntry.getKey();
295                                                        BaseRuntimeDeclaredChildDefinition existing = orderMap.remove(nextEntry.getKey());
296                                                        elementNames.remove(elementName);
297                                                        
298                                                        /*
299                                                         * See #350 - If the original field (in the superclass) with the given name is a choice, then we need to make sure
300                                                         * that the field which replaces is a choice even if it's only a choice of one type - this is because the
301                                                         * element name when serialized still needs to reflect the datatype
302                                                         */
303                                                        if (existing instanceof RuntimeChildChoiceDefinition) {
304                                                                childIsChoiceType = true;
305                                                        }
306                                                        break;
307                                                }
308                                        }
309                                        if (order == Child.REPLACE_PARENT) {
310                                                throw new ConfigurationException("Field " + nextField.getName() + "' on target type " + declaringClass.getSimpleName() + " has order() of REPLACE_PARENT (" + Child.REPLACE_PARENT
311                                                                + ") but no parent element with name " + elementName + " could be found on type " + nextField.getDeclaringClass().getSimpleName());
312                                        }
313
314                                }
315
316                        }
317                        
318                        if (order < 0 && order != Child.ORDER_UNKNOWN) {
319                                throw new ConfigurationException("Invalid order '" + order + "' on @Child for field '" + nextField.getName() + "' on target type: " + declaringClass);
320                        }
321                        
322                        if (order != Child.ORDER_UNKNOWN && !orderIsReplaceParent) {
323                                order = order + baseElementOrder;
324                        }
325                        // int min = childAnnotation.min();
326                        // int max = childAnnotation.max();
327
328                        /*
329                         * Anything that's marked as unknown is given a new ID that is <0 so that it doesn't conflict with any given IDs and can be figured out later
330                         */
331                        if (order == Child.ORDER_UNKNOWN) {
332                                order = 0;
333                                while (orderMap.containsKey(order)) {
334                                        order++;
335                                }
336                        }
337
338                        List<Class<? extends IBase>> choiceTypes = next.getChoiceTypes();
339                        
340                        if (orderMap.containsKey(order)) {
341                                throw new ConfigurationException("Detected duplicate field order '" + childAnnotation.order() + "' for element named '" + elementName + "' in type '" + declaringClass.getCanonicalName() + "' - Already had: " + orderMap.get(order).getElementName());
342                        }
343
344                        if (elementNames.contains(elementName)) {
345                                throw new ConfigurationException("Detected duplicate field name '" + elementName + "' in type '" + declaringClass.getCanonicalName() + "'");
346                        }
347
348                        Class<?> nextElementType = next.getElementType();
349
350                        BaseRuntimeDeclaredChildDefinition def;
351                        if (childAnnotation.name().equals("extension") && IBaseExtension.class.isAssignableFrom(nextElementType)) {
352                                def = new RuntimeChildExtension(nextField, childAnnotation.name(), childAnnotation, descriptionAnnotation);
353                        } else if (childAnnotation.name().equals("modifierExtension") && IBaseExtension.class.isAssignableFrom(nextElementType)) {
354                                def = new RuntimeChildExtension(nextField, childAnnotation.name(), childAnnotation, descriptionAnnotation);
355                        } else if (BaseContainedDt.class.isAssignableFrom(nextElementType) || (childAnnotation.name().equals("contained") && IBaseResource.class.isAssignableFrom(nextElementType))) {
356                                /*
357                                 * Child is contained resources
358                                 */
359                                def = new RuntimeChildContainedResources(nextField, childAnnotation, descriptionAnnotation, elementName);
360                        } else if (IAnyResource.class.isAssignableFrom(nextElementType) || IResource.class.equals(nextElementType)) {
361                                /*
362                                 * Child is a resource as a direct child, as in Bundle.entry.resource
363                                 */
364                                def = new RuntimeChildDirectResource(nextField, childAnnotation, descriptionAnnotation, elementName);
365                        } else {
366                                childIsChoiceType |= choiceTypes.size() > 1;
367                                if (extensionAttr == null && childIsChoiceType && !BaseResourceReferenceDt.class.isAssignableFrom(nextElementType) && !IBaseReference.class.isAssignableFrom(nextElementType)) {
368                                        def = new RuntimeChildChoiceDefinition(nextField, elementName, childAnnotation, descriptionAnnotation, choiceTypes);
369                                } else if (extensionAttr != null) {
370                                        /*
371                                         * Child is an extension
372                                         */
373                                        Class<? extends IBase> et = (Class<? extends IBase>) nextElementType;
374
375                                        Object binder = null;
376                                        if (BoundCodeDt.class.isAssignableFrom(nextElementType) || IBoundCodeableConcept.class.isAssignableFrom(nextElementType)) {
377                                                binder = ModelScanner.getBoundCodeBinder(nextField);
378                                        }
379
380                                        def = new RuntimeChildDeclaredExtensionDefinition(nextField, childAnnotation, descriptionAnnotation, extensionAttr, elementName, extensionAttr.url(), et,                                                       binder);
381
382                                        if (IBaseEnumeration.class.isAssignableFrom(nextElementType)) {
383                                                ((RuntimeChildDeclaredExtensionDefinition)def).setEnumerationType(ReflectionUtil.getGenericCollectionTypeOfFieldWithSecondOrderForList(nextField));
384                                        }
385                                } else if (BaseResourceReferenceDt.class.isAssignableFrom(nextElementType) || IBaseReference.class.isAssignableFrom(nextElementType)) {
386                                        /*
387                                         * Child is a resource reference
388                                         */
389                                        List<Class<? extends IBaseResource>> refTypesList = new ArrayList<>();
390                                        for (Class<? extends IElement> nextType : childAnnotation.type()) {
391                                                if (IBaseReference.class.isAssignableFrom(nextType)) {
392                                                        refTypesList.add(myContext.getVersion().getVersion().isRi() ? IAnyResource.class : IResource.class);
393                                                        continue;
394                                                } else if (IBaseResource.class.isAssignableFrom(nextType) == false) {
395                                                        throw new ConfigurationException("Field '" + nextField.getName() + "' in class '" + nextField.getDeclaringClass().getCanonicalName() + "' is of type " + BaseResourceReferenceDt.class + " but contains a non-resource type: " + nextType.getCanonicalName());
396                                                }
397                                                refTypesList.add((Class<? extends IBaseResource>) nextType);
398                                        }
399                                        def = new RuntimeChildResourceDefinition(nextField, elementName, childAnnotation, descriptionAnnotation, refTypesList);
400
401                                } else if (IResourceBlock.class.isAssignableFrom(nextElementType) || IBaseBackboneElement.class.isAssignableFrom(nextElementType)
402                                                || IBaseDatatypeElement.class.isAssignableFrom(nextElementType)) {
403                                        /*
404                                         * Child is a resource block (i.e. a sub-tag within a resource) TODO: do these have a better name according to HL7?
405                                         */
406
407                                        Class<? extends IBase> blockDef = (Class<? extends IBase>) nextElementType;
408                                        def = new RuntimeChildResourceBlockDefinition(myContext, nextField, childAnnotation, descriptionAnnotation, elementName, blockDef);
409                                } else if (IDatatype.class.equals(nextElementType) || IElement.class.equals(nextElementType) || "Type".equals(nextElementType.getSimpleName())
410                                                || IBaseDatatype.class.equals(nextElementType)) {
411
412                                        def = new RuntimeChildAny(nextField, elementName, childAnnotation, descriptionAnnotation);
413                                } else if (IDatatype.class.isAssignableFrom(nextElementType) || IPrimitiveType.class.isAssignableFrom(nextElementType) || ICompositeType.class.isAssignableFrom(nextElementType)
414                                                || IBaseDatatype.class.isAssignableFrom(nextElementType) || IBaseExtension.class.isAssignableFrom(nextElementType)) {
415                                        Class<? extends IBase> nextDatatype = (Class<? extends IBase>) nextElementType;
416
417                                        if (IPrimitiveType.class.isAssignableFrom(nextElementType)) {
418                                                if (nextElementType.equals(BoundCodeDt.class)) {
419                                                        IValueSetEnumBinder<Enum<?>> binder = ModelScanner.getBoundCodeBinder(nextField);
420                                                        Class<? extends Enum<?>> enumType = ModelScanner.determineEnumTypeForBoundField(nextField);
421                                                        def = new RuntimeChildPrimitiveBoundCodeDatatypeDefinition(nextField, elementName, childAnnotation, descriptionAnnotation, nextDatatype, binder, enumType);
422                                                } else if (IBaseEnumeration.class.isAssignableFrom(nextElementType)) {
423                                                        Class<? extends Enum<?>> binderType = ModelScanner.determineEnumTypeForBoundField(nextField);
424                                                        def = new RuntimeChildPrimitiveEnumerationDatatypeDefinition(nextField, elementName, childAnnotation, descriptionAnnotation, nextDatatype, binderType);
425                                                } else {
426                                                        def = new RuntimeChildPrimitiveDatatypeDefinition(nextField, elementName, descriptionAnnotation, childAnnotation, nextDatatype);
427                                                }
428                                        } else {
429                                                if (IBoundCodeableConcept.class.isAssignableFrom(nextElementType)) {
430                                                        IValueSetEnumBinder<Enum<?>> binder = ModelScanner.getBoundCodeBinder(nextField);
431                                                        Class<? extends Enum<?>> enumType = ModelScanner.determineEnumTypeForBoundField(nextField);
432                                                        def = new RuntimeChildCompositeBoundDatatypeDefinition(nextField, elementName, childAnnotation, descriptionAnnotation, nextDatatype, binder, enumType);
433                                                } else if (BaseNarrativeDt.class.isAssignableFrom(nextElementType) || INarrative.class.isAssignableFrom(nextElementType)) {
434                                                        def = new RuntimeChildNarrativeDefinition(nextField, elementName, childAnnotation, descriptionAnnotation, nextDatatype);
435                                                } else {
436                                                        def = new RuntimeChildCompositeDatatypeDefinition(nextField, elementName, childAnnotation, descriptionAnnotation, nextDatatype);
437                                                }
438                                        }
439
440                                } else {
441                                        throw new ConfigurationException("Field '" + elementName + "' in type '" + declaringClass.getCanonicalName() + "' is not a valid child type: " + nextElementType);
442                                }
443
444                                Binding bindingAnnotation = ModelScanner.pullAnnotation(nextField, Binding.class);
445                                if (bindingAnnotation != null) {
446                                        if (isNotBlank(bindingAnnotation.valueSet())) {
447                                                def.setBindingValueSet(bindingAnnotation.valueSet());
448                                        }
449                                }
450                                
451                        }
452
453                        orderMap.put(order, def);
454                        elementNames.add(elementName);
455                }
456        }
457        @Override 
458        void sealAndInitialize(FhirContext theContext, Map<Class<? extends IBase>, BaseRuntimeElementDefinition<?>> theClassToElementDefinitions) {
459                if (mySealed) {
460                        return;
461                }
462                mySealed = true;
463
464                scanCompositeElementForChildren();
465                
466                super.sealAndInitialize(theContext, theClassToElementDefinitions);
467
468                for (BaseRuntimeChildDefinition next : myChildren) {
469                        next.sealAndInitialize(theContext, theClassToElementDefinitions);
470                }
471
472                myNameToChild = new HashMap<>();
473                for (BaseRuntimeChildDefinition next : myChildren) {    
474                        if (next instanceof RuntimeChildChoiceDefinition) {
475                                String key = next.getElementName()+"[x]";
476                                myNameToChild.put(key, next);
477                        }
478                        for (String nextName : next.getValidChildNames()) {
479                                if (myNameToChild.containsKey(nextName)) {
480                                        throw new ConfigurationException("Duplicate child name[" + nextName + "] in Element[" + getName() + "]");
481                                }
482                                myNameToChild.put(nextName, next);
483                        }
484                }
485
486                myChildren = Collections.unmodifiableList(myChildren);
487                myNameToChild = Collections.unmodifiableMap(myNameToChild);
488                
489                List<BaseRuntimeChildDefinition> children = new ArrayList<>();
490                children.addAll(myChildren);
491                
492                /*
493                 * Because of the way the type hierarchy works for DSTU2 resources,
494                 * things end up in the wrong order
495                 */
496                if (theContext.getVersion().getVersion() == FhirVersionEnum.DSTU2) {
497                        int extIndex = findIndex(children, "extension", false);
498                        int containedIndex = findIndex(children, "contained", false);
499                        if (containedIndex != -1 && extIndex != -1 && extIndex < containedIndex) {
500                                BaseRuntimeChildDefinition extension = children.remove(extIndex);
501                                if (containedIndex > children.size()) {
502                                        children.add(extension);
503                                } else {
504                                        children.add(containedIndex, extension);
505                                }
506                                int modIndex = findIndex(children, "modifierExtension", false);
507                                if (modIndex < containedIndex) {
508                                        extension = children.remove(modIndex);
509                                        if (containedIndex > children.size()) {
510                                                children.add(extension);
511                                        } else {
512                                                children.add(containedIndex, extension);
513                                        }
514                                }
515                        }
516                }
517                
518                /*
519                 * Add declared extensions alongside the undeclared ones
520                 */
521                if (getExtensionsNonModifier().isEmpty() == false) {
522                        children.addAll(findIndex(children, "extension", true), getExtensionsNonModifier());
523                }
524                if (getExtensionsModifier().isEmpty() == false) {
525                        children.addAll(findIndex(children, "modifierExtension", true), getExtensionsModifier());
526                }
527                
528                myChildrenAndExtensions=Collections.unmodifiableList(children);
529        }
530
531        
532        @Override
533        protected void validateSealed() {
534                if (!mySealed) {
535                        synchronized(myContext) {
536                                if(!mySealed) {
537                                        sealAndInitialize(myContext, myClassToElementDefinitions);
538                                }
539                        }
540                }
541        }
542
543        private static int findIndex(List<BaseRuntimeChildDefinition> theChildren, String theName, boolean theDefaultAtEnd) {
544                int index = theDefaultAtEnd ? theChildren.size() : -1;
545                for (ListIterator<BaseRuntimeChildDefinition> iter = theChildren.listIterator(); iter.hasNext(); ) {
546                        if (iter.next().getElementName().equals(theName)) {
547                                index = iter.previousIndex();
548                                break;
549                        }
550                }
551                return index;
552        }
553
554        private static class ScannedField {
555                private Child myChildAnnotation;
556
557                private List<Class<? extends IBase>> myChoiceTypes = new ArrayList<>();
558                private Class<?> myElementType;
559                private Field myField;
560                private boolean myFirstFieldInNewClass;
561                ScannedField(Field theField, Class<?> theClass, boolean theFirstFieldInNewClass) {
562                        myField = theField;
563                        myFirstFieldInNewClass = theFirstFieldInNewClass;
564
565                        Child childAnnotation = ModelScanner.pullAnnotation(theField, Child.class);
566                        if (childAnnotation == null) {
567                                ourLog.trace("Ignoring non @Child field {} on target type {}", theField.getName(), theClass);
568                                return;
569                        }
570                        if (Modifier.isFinal(theField.getModifiers())) {
571                                ourLog.trace("Ignoring constant {} on target type {}", theField.getName(), theClass);
572                                return;
573                        }
574                        
575                        myChildAnnotation = childAnnotation;
576                        myElementType = ModelScanner.determineElementType(theField);
577
578                        Collections.addAll(myChoiceTypes, childAnnotation.type());
579                }
580                
581                public Child getChildAnnotation() {
582                        return myChildAnnotation;
583                }
584
585                public List<Class<? extends IBase>> getChoiceTypes() {
586                        return myChoiceTypes;
587                }
588
589                public Class<?> getElementType() {
590                        return myElementType;
591                }
592
593                public Field getField() {
594                        return myField;
595                }
596
597                public boolean isFirstFieldInNewClass() {
598                        return myFirstFieldInNewClass;
599                }
600        }
601
602}