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Cross version extennsion support + improve extension validation

This commit is contained in:
Grahame Grieve 2019-12-19 10:50:25 +11:00
parent 4922522adf
commit 3ce532968a
3 changed files with 230 additions and 23 deletions
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90
org.hl7.fhir.validation/src/main/java/org/hl7/fhir/r5/validation/InstanceValidator.java
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@ -381,6 +381,7 @@ public class InstanceValidator extends BaseValidator implements IResourceValidat
private EnableWhenEvaluator myEnableWhenEvaluator = new EnableWhenEvaluator(); private EnableWhenEvaluator myEnableWhenEvaluator = new EnableWhenEvaluator();
private String executionId; private String executionId;
private XVerExtensionManager xverManager;
/* /*
* Keeps track of whether a particular profile has been checked or not yet * Keeps track of whether a particular profile has been checked or not yet
@ -1551,25 +1552,53 @@ public class InstanceValidator extends BaseValidator implements IResourceValidat
} }
} }
private StructureDefinition checkExtension(ValidatorHostContext hostContext, List<ValidationMessage> errors, String path, Element resource, Element element, ElementDefinition def, StructureDefinition profile, NodeStack stack) throws FHIRException, IOException { private StructureDefinition checkExtension(ValidatorHostContext hostContext, List<ValidationMessage> errors, String path, Element resource, Element element, ElementDefinition def, StructureDefinition profile, NodeStack stack, String extensionUrl) throws FHIRException, IOException {
String url = element.getNamedChildValue("url"); String url = element.getNamedChildValue("url");
boolean isModifier = element.getName().equals("modifierExtension"); boolean isModifier = element.getName().equals("modifierExtension");
long t = System.nanoTime(); long t = System.nanoTime();
StructureDefinition ex = context.fetchResource(StructureDefinition.class, url); StructureDefinition ex = Utilities.isAbsoluteUrl(url) ? context.fetchResource(StructureDefinition.class, url) : null;
sdTime = sdTime + (System.nanoTime() - t); sdTime = sdTime + (System.nanoTime() - t);
if (ex == null) { if (ex == null) {
if (!url.startsWith("http://hl7.org/fhir/4.0/StructureDefinition/extension-")) if (xverManager == null) {
if (rule(errors, IssueType.STRUCTURE, element.line(), element.col(), path, allowUnknownExtension(url), "The extension " + url + " is unknown, and not allowed here")) xverManager = new XVerExtensionManager(context);
}
if (xverManager.matchingUrl(url)) {
switch (xverManager.status(url)) {
case BadVersion:
rule(errors, IssueType.INVALID, element.line(), element.col(), path + "[url='" + url + "']", false, "Extension url '" + url + "' evaluation state is not valid (invalidVersion \""+xverManager.getVersion(url)+"\")");
break;
case Unknown:
rule(errors, IssueType.INVALID, element.line(), element.col(), path + "[url='" + url + "']", false, "Extension url '" + url + "' evaluation state is not valid (unknown Element id \""+xverManager.getElementId(url)+"\")");
break;
case Invalid:
rule(errors, IssueType.INVALID, element.line(), element.col(), path + "[url='" + url + "']", false, "Extension url '" + url + "' evaluation state is not valid (Element id \""+xverManager.getElementId(url)+"\" is valid, but cannot be used in a cross-version paradigm because there has been no changes across the relevant versions)");
break;
case Valid:
ex = xverManager.makeDefinition(url);
context.generateSnapshot(ex);
context.cacheResource(ex);
break;
default:
rule(errors, IssueType.INVALID, element.line(), element.col(), path + "[url='" + url + "']", false, "Extension url '" + url + "' evaluation state illegal");
break;
}
} else if (extensionUrl != null && !isAbsolute(url)) {
if (extensionUrl.equals(profile.getUrl())) {
rule(errors, IssueType.INVALID, element.line(), element.col(), path + "[url='" + url + "']", hasExtensionSlice(profile, url), "Sub-extension url '" + url + "' is not defined by the Extension "+profile.getUrl());
}
} else if (rule(errors, IssueType.STRUCTURE, element.line(), element.col(), path, allowUnknownExtension(url), "The extension " + url + " is unknown, and not allowed here")) {
hint(errors, IssueType.STRUCTURE, element.line(), element.col(), path, isKnownExtension(url), "Unknown extension " + url); hint(errors, IssueType.STRUCTURE, element.line(), element.col(), path, isKnownExtension(url), "Unknown extension " + url);
} else { }
if (def.getIsModifier()) }
if (ex != null) {
if (def.getIsModifier()) {
rule(errors, IssueType.STRUCTURE, element.line(), element.col(), path + "[url='" + url + "']", ex.getSnapshot().getElement().get(0).getIsModifier(), rule(errors, IssueType.STRUCTURE, element.line(), element.col(), path + "[url='" + url + "']", ex.getSnapshot().getElement().get(0).getIsModifier(),
"Extension modifier mismatch: the extension element is labelled as a modifier, but the underlying extension is not"); "Extension modifier mismatch: the extension element is labelled as a modifier, but the underlying extension is not");
else } else {
rule(errors, IssueType.STRUCTURE, element.line(), element.col(), path + "[url='" + url + "']", !ex.getSnapshot().getElement().get(0).getIsModifier(), rule(errors, IssueType.STRUCTURE, element.line(), element.col(), path + "[url='" + url + "']", !ex.getSnapshot().getElement().get(0).getIsModifier(),
"Extension modifier mismatch: the extension element is not labelled as a modifier, but the underlying extension is"); "Extension modifier mismatch: the extension element is not labelled as a modifier, but the underlying extension is");
}
// two questions // two questions
// 1. can this extension be used here? // 1. can this extension be used here?
checkExtensionContext(errors, element, /* path+"[url='"+url+"']", */ ex, stack, ex.getUrl()); checkExtensionContext(errors, element, /* path+"[url='"+url+"']", */ ex, stack, ex.getUrl());
@ -1590,12 +1619,21 @@ public class InstanceValidator extends BaseValidator implements IResourceValidat
rule(errors, IssueType.STRUCTURE, element.line(), element.col(), path + "[url='" + url + "']", allowedTypes.contains(actualType), "The Extension '" + url + "' definition allows for the types "+allowedTypes.toString()+" but found type "+actualType); rule(errors, IssueType.STRUCTURE, element.line(), element.col(), path + "[url='" + url + "']", allowedTypes.contains(actualType), "The Extension '" + url + "' definition allows for the types "+allowedTypes.toString()+" but found type "+actualType);
// 3. is the content of the extension valid? // 3. is the content of the extension valid?
validateElement(hostContext, errors, ex, ex.getSnapshot().getElement().get(0), null, null, resource, element, "Extension", stack, false, true); validateElement(hostContext, errors, ex, ex.getSnapshot().getElement().get(0), null, null, resource, element, "Extension", stack, false, true, url);
} }
return ex; return ex;
} }
private boolean hasExtensionSlice(StructureDefinition profile, String sliceName) {
for (ElementDefinition ed : profile.getSnapshot().getElement()) {
if (ed.getPath().equals("Extension.extension.url") && ed.hasFixed() && sliceName.equals(ed.getFixed().primitiveValue())) {
return true;
}
}
return false;
}
private String getExtensionType(Element element) { private String getExtensionType(Element element) {
for (Element e : element.getChildren()) { for (Element e : element.getChildren()) {
if (e.getName().startsWith("value")) { if (e.getName().startsWith("value")) {
@ -3232,7 +3270,7 @@ public class InstanceValidator extends BaseValidator implements IResourceValidat
(rule(errors, IssueType.STRUCTURE, element.line(), element.col(), stack.getLiteralPath(), defn.hasSnapshot(), (rule(errors, IssueType.STRUCTURE, element.line(), element.col(), stack.getLiteralPath(), defn.hasSnapshot(),
"StructureDefinition has no snapshot - validation is against the snapshot, so it must be provided"))) { "StructureDefinition has no snapshot - validation is against the snapshot, so it must be provided"))) {
// Don't need to validate against the resource if there's a profile because the profile snapshot will include the relevant parts of the resources // Don't need to validate against the resource if there's a profile because the profile snapshot will include the relevant parts of the resources
validateElement(hostContext, errors, defn, defn.getSnapshot().getElement().get(0), null, null, resource, element, element.getName(), stack, false, true); validateElement(hostContext, errors, defn, defn.getSnapshot().getElement().get(0), null, null, resource, element, element.getName(), stack, false, true, null);
} }
// specific known special validations // specific known special validations
@ -3253,7 +3291,7 @@ public class InstanceValidator extends BaseValidator implements IResourceValidat
// todo: re-enable this when I can deal with the impact... (GG) // todo: re-enable this when I can deal with the impact... (GG)
// if (!profileUsage.getProfile().getType().equals(resource.fhirType())) // if (!profileUsage.getProfile().getType().equals(resource.fhirType()))
// throw new FHIRException("Profile type mismatch - resource is "+resource.fhirType()+", and profile is for "+profileUsage.getProfile().getType()); // throw new FHIRException("Profile type mismatch - resource is "+resource.fhirType()+", and profile is for "+profileUsage.getProfile().getType());
validateElement(hostContext, errors, profileUsage.getProfile(), profileUsage.getProfile().getSnapshot().getElement().get(0), null, null, resource, element, element.getName(), stack, false, true); validateElement(hostContext, errors, profileUsage.getProfile(), profileUsage.getProfile().getSnapshot().getElement().get(0), null, null, resource, element, element.getName(), stack, false, true, null);
} }
} }
@ -4287,7 +4325,7 @@ private boolean isAnswerRequirementFulfilled(QuestionnaireItemComponent qItem, L
// firstBase = ebase == null ? base : ebase; // firstBase = ebase == null ? base : ebase;
private void validateElement(ValidatorHostContext hostContext, List<ValidationMessage> errors, StructureDefinition profile, ElementDefinition definition, StructureDefinition cprofile, ElementDefinition context, private void validateElement(ValidatorHostContext hostContext, List<ValidationMessage> errors, StructureDefinition profile, ElementDefinition definition, StructureDefinition cprofile, ElementDefinition context,
Element resource, Element element, String actualType, NodeStack stack, boolean inCodeableConcept, boolean checkDisplayInContext) throws FHIRException, FHIRException, IOException { Element resource, Element element, String actualType, NodeStack stack, boolean inCodeableConcept, boolean checkDisplayInContext, String extensionUrl) throws FHIRException, FHIRException, IOException {
// element.markValidation(profile, definition); // element.markValidation(profile, definition);
if (debug) { if (debug) {
@ -4324,12 +4362,12 @@ private boolean isAnswerRequirementFulfilled(QuestionnaireItemComponent qItem, L
// 5. inspect each child for validity // 5. inspect each child for validity
for (ElementInfo ei : children) { for (ElementInfo ei : children) {
checkChild(hostContext, errors, profile, definition, resource, element, actualType, stack, inCodeableConcept, checkDisplayInContext, ei); checkChild(hostContext, errors, profile, definition, resource, element, actualType, stack, inCodeableConcept, checkDisplayInContext, ei, extensionUrl);
} }
} }
public void checkChild(ValidatorHostContext hostContext, List<ValidationMessage> errors, StructureDefinition profile, ElementDefinition definition, public void checkChild(ValidatorHostContext hostContext, List<ValidationMessage> errors, StructureDefinition profile, ElementDefinition definition,
Element resource, Element element, String actualType, NodeStack stack, boolean inCodeableConcept, boolean checkDisplayInContext, ElementInfo ei) Element resource, Element element, String actualType, NodeStack stack, boolean inCodeableConcept, boolean checkDisplayInContext, ElementInfo ei, String extensionUrl)
throws FHIRException, IOException, DefinitionException { throws FHIRException, IOException, DefinitionException {
List<String> profiles = new ArrayList<String>(); List<String> profiles = new ArrayList<String>();
if (ei.definition != null) { if (ei.definition != null) {
@ -4405,6 +4443,7 @@ private boolean isAnswerRequirementFulfilled(QuestionnaireItemComponent qItem, L
String eiPath = ei.path; String eiPath = ei.path;
assert(eiPath.equals(localStackLiterapPath)) : "ei.path: " + ei.path + " - localStack.getLiteralPath: " + localStackLiterapPath; assert(eiPath.equals(localStackLiterapPath)) : "ei.path: " + ei.path + " - localStack.getLiteralPath: " + localStackLiterapPath;
boolean thisIsCodeableConcept = false; boolean thisIsCodeableConcept = false;
String thisExtension = null;
boolean checkDisplay = true; boolean checkDisplay = true;
checkInvariants(hostContext, errors, profile, ei.definition, resource, ei.element, localStack, true); checkInvariants(hostContext, errors, profile, ei.definition, resource, ei.element, localStack, true);
@ -4431,8 +4470,17 @@ private boolean isAnswerRequirementFulfilled(QuestionnaireItemComponent qItem, L
} else if (type.equals("Reference")) { } else if (type.equals("Reference")) {
checkReference(hostContext, errors, ei.path, ei.element, profile, ei.definition, actualType, localStack); checkReference(hostContext, errors, ei.path, ei.element, profile, ei.definition, actualType, localStack);
// We only check extensions if we're not in a complex extension or if the element we're dealing with is not defined as part of that complex extension // We only check extensions if we're not in a complex extension or if the element we're dealing with is not defined as part of that complex extension
} else if (type.equals("Extension") && ei.element.getChildValue("url") != null && ei.element.getChildValue("url").contains("/")) { } else if (type.equals("Extension")) {
checkExtension(hostContext, errors, ei.path, resource, ei.element, ei.definition, profile, localStack); Element eurl = ei.element.getNamedChild("url");
if (rule(errors, IssueType.INVALID, ei.path, eurl != null, "Extension.url is required")) {
String url = eurl.primitiveValue();
thisExtension = url;
if (rule(errors, IssueType.INVALID, ei.path, !Utilities.noString(url), "Extension.url is required")) {
if (rule(errors, IssueType.INVALID, ei.path, (extensionUrl != null) || Utilities.isAbsoluteUrl(url), "Extension.url must be an absolute URL")) {
checkExtension(hostContext, errors, ei.path, resource, ei.element, ei.definition, profile, localStack, extensionUrl);
}
}
}
} else if (type.equals("Resource")) { } else if (type.equals("Resource")) {
validateContains(hostContext, errors, ei.path, ei.definition, definition, resource, ei.element, localStack, idStatusForEntry(element, ei)); // if validateContains(hostContext, errors, ei.path, ei.definition, definition, resource, ei.element, localStack, idStatusForEntry(element, ei)); // if
// (str.matches(".*([.,/])work\\1$")) // (str.matches(".*([.,/])work\\1$"))
@ -4450,7 +4498,7 @@ private boolean isAnswerRequirementFulfilled(QuestionnaireItemComponent qItem, L
} }
} else { } else {
if (rule(errors, IssueType.STRUCTURE, ei.line(), ei.col(), stack.getLiteralPath(), ei.definition != null, "Unrecognised Content " + ei.name)) if (rule(errors, IssueType.STRUCTURE, ei.line(), ei.col(), stack.getLiteralPath(), ei.definition != null, "Unrecognised Content " + ei.name))
validateElement(hostContext, errors, profile, ei.definition, null, null, resource, ei.element, type, localStack, false, true); validateElement(hostContext, errors, profile, ei.definition, null, null, resource, ei.element, type, localStack, false, true, null);
} }
StructureDefinition p = null; StructureDefinition p = null;
boolean elementValidated = false; boolean elementValidated = false;
@ -4490,7 +4538,7 @@ private boolean isAnswerRequirementFulfilled(QuestionnaireItemComponent qItem, L
p = this.context.fetchResource(StructureDefinition.class, typeProfile); p = this.context.fetchResource(StructureDefinition.class, typeProfile);
if (rule(errors, IssueType.STRUCTURE, ei.line(), ei.col(), ei.path, p != null, "Unknown profile " + typeProfile)) { if (rule(errors, IssueType.STRUCTURE, ei.line(), ei.col(), ei.path, p != null, "Unknown profile " + typeProfile)) {
List<ValidationMessage> profileErrors = new ArrayList<ValidationMessage>(); List<ValidationMessage> profileErrors = new ArrayList<ValidationMessage>();
validateElement(hostContext, profileErrors, p, getElementByTail(p, tail), profile, ei.definition, resource, ei.element, type, localStack, thisIsCodeableConcept, checkDisplay); validateElement(hostContext, profileErrors, p, getElementByTail(p, tail), profile, ei.definition, resource, ei.element, type, localStack, thisIsCodeableConcept, checkDisplay, thisExtension);
if (hasErrors(profileErrors)) if (hasErrors(profileErrors))
badProfiles.put(typeProfile, profileErrors); badProfiles.put(typeProfile, profileErrors);
else else
@ -4522,15 +4570,15 @@ private boolean isAnswerRequirementFulfilled(QuestionnaireItemComponent qItem, L
if (p!=null) { if (p!=null) {
if (!elementValidated) { if (!elementValidated) {
if (ei.element.getSpecial() == SpecialElement.BUNDLE_ENTRY || ei.element.getSpecial() == SpecialElement.BUNDLE_OUTCOME || ei.element.getSpecial() == SpecialElement.PARAMETER ) if (ei.element.getSpecial() == SpecialElement.BUNDLE_ENTRY || ei.element.getSpecial() == SpecialElement.BUNDLE_OUTCOME || ei.element.getSpecial() == SpecialElement.PARAMETER )
validateElement(hostContext, errors, p, getElementByTail(p, tail), profile, ei.definition, ei.element, ei.element, type, localStack, thisIsCodeableConcept, checkDisplay); validateElement(hostContext, errors, p, getElementByTail(p, tail), profile, ei.definition, ei.element, ei.element, type, localStack, thisIsCodeableConcept, checkDisplay, thisExtension);
else else
validateElement(hostContext, errors, p, getElementByTail(p, tail), profile, ei.definition, resource, ei.element, type, localStack, thisIsCodeableConcept, checkDisplay); validateElement(hostContext, errors, p, getElementByTail(p, tail), profile, ei.definition, resource, ei.element, type, localStack, thisIsCodeableConcept, checkDisplay, thisExtension);
} }
int index = profile.getSnapshot().getElement().indexOf(ei.definition); int index = profile.getSnapshot().getElement().indexOf(ei.definition);
if (index < profile.getSnapshot().getElement().size() - 1) { if (index < profile.getSnapshot().getElement().size() - 1) {
String nextPath = profile.getSnapshot().getElement().get(index+1).getPath(); String nextPath = profile.getSnapshot().getElement().get(index+1).getPath();
if (!nextPath.equals(ei.definition.getPath()) && nextPath.startsWith(ei.definition.getPath())) if (!nextPath.equals(ei.definition.getPath()) && nextPath.startsWith(ei.definition.getPath()))
validateElement(hostContext, errors, profile, ei.definition, null, null, resource, ei.element, type, localStack, thisIsCodeableConcept, checkDisplay); validateElement(hostContext, errors, profile, ei.definition, null, null, resource, ei.element, type, localStack, thisIsCodeableConcept, checkDisplay, thisExtension);
} }
} }
} }

5
org.hl7.fhir.validation/src/main/java/org/hl7/fhir/r5/validation/ValidationEngine.java
View File

@ -406,6 +406,8 @@ public class ValidationEngine implements IValidatorResourceFetcher {
context = SimpleWorkerContext.fromDefinitions(source, loaderForVersion()); context = SimpleWorkerContext.fromDefinitions(source, loaderForVersion());
context.setAllowLoadingDuplicates(true); // because of Forge context.setAllowLoadingDuplicates(true); // because of Forge
context.setExpansionProfile(makeExpProfile()); context.setExpansionProfile(makeExpProfile());
NpmPackage npm = pcm.loadPackage("hl7.fhir.xver-extensions", "0.0.1");
context.loadFromPackage(npm, null);
grabNatives(source, "http://hl7.org/fhir"); grabNatives(source, "http://hl7.org/fhir");
} }
@ -1614,7 +1616,8 @@ public class ValidationEngine implements IValidatorResourceFetcher {
if (context.fetchResource(Resource.class, url) != null) if (context.fetchResource(Resource.class, url) != null)
return true; return true;
if (Utilities.existsInList(url, "http://hl7.org/fhir/sid/us-ssn", "http://hl7.org/fhir/sid/cvx", "http://hl7.org/fhir/sid/ndc", "http://hl7.org/fhir/sid/us-npi", if (Utilities.existsInList(url, "http://hl7.org/fhir/sid/us-ssn", "http://hl7.org/fhir/sid/cvx", "http://hl7.org/fhir/sid/ndc", "http://hl7.org/fhir/sid/us-npi",
"http://hl7.org/fhir/sid/icd-10-vn", "http://hl7.org/fhir/sid/icd-10-cm", "http://hl7.org/fhir/sid/icd-9-cm", "http://hl7.org/fhir/w5", "http://hl7.org/fhir/fivews", "http://hl7.org/fhir/workflow")) { "http://hl7.org/fhir/sid/icd-10-vn", "http://hl7.org/fhir/sid/icd-10-cm", "http://hl7.org/fhir/sid/icd-9-cm", "http://hl7.org/fhir/w5", "http://hl7.org/fhir/fivews",
"http://hl7.org/fhir/workflow", "http://hl7.org/fhir/ConsentPolicy/opt-out", "http://hl7.org/fhir/ConsentPolicy/opt-in")) {
return true; return true;
} }
return false; return false;

156
org.hl7.fhir.validation/src/main/java/org/hl7/fhir/r5/validation/XVerExtensionManager.java Normal file
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@ -0,0 +1,156 @@
package org.hl7.fhir.r5.validation;
import java.io.IOException;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.hl7.fhir.exceptions.FHIRException;
import org.hl7.fhir.r5.context.IWorkerContext;
import org.hl7.fhir.r5.model.ElementDefinition;
import org.hl7.fhir.r5.model.ElementDefinition.TypeRefComponent;
import org.hl7.fhir.r5.model.Enumerations.FHIRVersion;
import org.hl7.fhir.r5.model.Enumerations.PublicationStatus;
import org.hl7.fhir.r5.model.StructureDefinition;
import org.hl7.fhir.r5.model.StructureDefinition.ExtensionContextType;
import org.hl7.fhir.r5.model.StructureDefinition.StructureDefinitionKind;
import org.hl7.fhir.r5.model.StructureDefinition.TypeDerivationRule;
import org.hl7.fhir.r5.model.UriType;
import org.hl7.fhir.r5.validation.XVerExtensionManager.XVerExtensionStatus;
import org.hl7.fhir.utilities.json.JsonTrackingParser;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
public class XVerExtensionManager {
public enum XVerExtensionStatus {
BadVersion, Unknown, Invalid, Valid
}
private Map<String, JsonObject> lists = new HashMap<>();
private IWorkerContext context;
public XVerExtensionManager(IWorkerContext context) {
this.context = context;
}
public XVerExtensionStatus status(String url) throws IOException {
String v = url.substring(20, 23);
String e = url.substring(54);
if (!lists.containsKey(v)) {
if (context.getBinaries().containsKey("xver-paths-"+v+".json")) {
lists.put(v, JsonTrackingParser.parseJson(context.getBinaries().get("xver-paths-"+v+".json")));
} else {
return XVerExtensionStatus.BadVersion;
}
}
JsonObject root = lists.get(v);
JsonObject path = root.getAsJsonObject(e);
if (path == null) {
return XVerExtensionStatus.Unknown;
}
if (path.has("elements") || path.has("types")) {
return XVerExtensionStatus.Valid;
} else {
return XVerExtensionStatus.Invalid;
}
}
public String getElementId(String url) {
return url.substring(54);
}
public StructureDefinition makeDefinition(String url) {
String v = url.substring(20, 23);
String e = url.substring(54);
JsonObject root = lists.get(v);
JsonObject path = root.getAsJsonObject(e);
StructureDefinition sd = new StructureDefinition();
sd.setUrl(url);
sd.setVersion(context.getVersion());
sd.setFhirVersion(FHIRVersion.fromCode(context.getVersion()));
sd.setKind(StructureDefinitionKind.COMPLEXTYPE);
sd.setType("Extension");
sd.setDerivation(TypeDerivationRule.CONSTRAINT);
sd.setName("Extension-"+v+"-"+e);
sd.setTitle("Extension Definition for "+e+" for Version "+v);
sd.setStatus(PublicationStatus.ACTIVE);
sd.setExperimental(false);
sd.setDate(new Date());
sd.setPublisher("FHIR Project");
sd.setPurpose("Defined so the validator can validate cross version extensions (see http://hl7.org/fhir/versions.html#extensions)");
sd.setAbstract(false);
sd.addContext().setType(ExtensionContextType.ELEMENT).setExpression(head(e));
sd.setBaseDefinition("http://hl7.org/fhir/StructureDefinition/Extension");
if (path.has("types")) {
sd.getDifferential().addElement().setPath("Extension.extension").setMax("0");
sd.getDifferential().addElement().setPath("Extension.url").setFixed(new UriType(url));
ElementDefinition val = sd.getDifferential().addElement().setPath("Extension.value[x]").setMin(1);
populateTypes(path, val);
} else if (path.has("elements")) {
for (JsonElement i : path.getAsJsonArray("elements")) {
String s = i.getAsString();
sd.getDifferential().addElement().setPath("Extension.extension").setSliceName(s);
sd.getDifferential().addElement().setPath("Extension.extension.extension").setMax("0");
sd.getDifferential().addElement().setPath("Extension.extension.url").setFixed(new UriType(s));
ElementDefinition val = sd.getDifferential().addElement().setPath("Extension.extension.value[x]").setMin(1);
JsonObject elt = root.getAsJsonObject(e+"."+s);
if (!elt.has("types")) {
throw new FHIRException("Internal error - nested elements not supported yet");
}
populateTypes(elt, val);
}
sd.getDifferential().addElement().setPath("Extension.url").setFixed(new UriType(url));
sd.getDifferential().addElement().setPath("Extension.value[x]").setMax("0");
} else {
throw new FHIRException("Internal error - attempt to define extension for "+url+" when it is invalid");
}
return sd;
}
public void populateTypes(JsonObject path, ElementDefinition val) {
for (JsonElement i : path.getAsJsonArray("types")) {
String s = i.getAsString();
if (s.contains("(")) {
String t = s.substring(0, s.indexOf("("));
TypeRefComponent tr = val.addType().setCode(s);
s = s.substring(t.length()+1);
for (String p : s.substring(0, s.length()-1).split("\\|")) {
tr.addTargetProfile("http://hl7.org/fhir/StructureDefinition/"+p);
}
} else {
val.addType().setCode(s);
}
}
}
private String head(String id) {
if (id.contains(".")) {
return id.substring(0, id.lastIndexOf("."));
} else {
return id;
}
}
public String getVersion(String url) {
return url.substring(20, 23);
}
public boolean matchingUrl(String url) {
if (url == null || url.length() < 56) {
return false;
}
String pfx = url.substring(0, 20);
String v = url.substring(20, 23);
String sfx = url.substring(23, 54);
return pfx.equals("http://hl7.org/fhir/") &&
isVersionPattern(v) && sfx.equals("/StructureDefinition/extension-");
}
private boolean isVersionPattern(String v) {
return v.length() == 3 && Character.isDigit(v.charAt(0)) && v.charAt(1) == '.' && Character.isDigit(v.charAt(2));
}
}