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First implementation of enableWhen evaluator

This commit is contained in:
Okko Kauhanen 2018-11-05 12:01:25 +02:00
parent 92936d6889
commit 0dcc4fa189
2 changed files with 164 additions and 100 deletions
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193
hapi-fhir-validation/src/main/java/org/hl7/fhir/instance/validation/DefaultEnableWhenEvaluator.java
View File

@ -1,36 +1,35 @@
package org.hl7.fhir.instance.validation;
import org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemComponent;
import org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemEnableWhenComponent;
import java.util.*;
import java.util.stream.Collectors;
import java.util.ArrayList;
import java.util.List;
import org.hl7.fhir.dstu3.model.QuestionnaireResponse;
import org.hl7.fhir.dstu3.model.QuestionnaireResponse.QuestionnaireResponseItemComponent;
import org.hl7.fhir.exceptions.FHIRException;
import org.hl7.fhir.r4.elementmodel.Element;
import org.hl7.fhir.r4.model.*;
import org.hl7.fhir.r4.model.Questionnaire.*;
/**
* Evaluates Questionnaire.item.enableWhen against a QuestionnaireResponse.
* Ignores possible modifierExtensions and extensions.
*
*/
public class DefaultEnableWhenEvaluator implements IEnableWhenEvaluator {
public static final String LINKID_ELEMENT = "linkId";
public static final String ITEM_ELEMENT = "item";
public static final String ANSWER_ELEMENT = "answer";
@Override
public boolean isQuestionEnabled(QuestionnaireItemComponent item, List<QuestionnaireResponseItemComponent> resp) {
public boolean isQuestionEnabled(org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemComponent item,
List<QuestionnaireResponseItemComponent> resp) {
boolean enabled = true;
if(item.hasEnableWhen()) {
enabled = false;
for( QuestionnaireItemEnableWhenComponent enable : item.getEnableWhen()) {
for(org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemEnableWhenComponent enable : item.getEnableWhen()) {
if(enable.getHasAnswer()) {
// check if referenced question has answer
String itemId = enable.getQuestion();
for(QuestionnaireResponseItemComponent respItem : resp) {
if(respItem.getLinkId().equalsIgnoreCase(itemId) && respItem.hasAnswer()) {
//TODO check answer value
enabled = true;
}
@ -38,9 +37,7 @@ public class DefaultEnableWhenEvaluator implements IEnableWhenEvaluator {
} else {
// and if not
String itemId = enable.getQuestion();
for(QuestionnaireResponseItemComponent respItem : resp) {
if(respItem.getLinkId().equalsIgnoreCase(itemId) && !respItem.hasAnswer()) {
@ -52,59 +49,129 @@ public class DefaultEnableWhenEvaluator implements IEnableWhenEvaluator {
}
}
}
return enabled;
}
@Override
public boolean isQuestionEnabled(org.hl7.fhir.r4.model.Questionnaire.QuestionnaireItemComponent item,
Element element) {
boolean enabled = true;
if(item.hasEnableWhen()) {
enabled = false;
for( org.hl7.fhir.r4.model.Questionnaire.QuestionnaireItemEnableWhenComponent enable : item.getEnableWhen()) {
if(enable.hasAnswer()) {
// check if referenced question has answer
String itemId = enable.getQuestion();
List<Element> items = new ArrayList<Element>();
element.getNamedChildren("item", items);
for(Element respItem : items) {
// TODO toteuta uudelleen
public boolean isQuestionEnabled(QuestionnaireItemComponent questionnaireItem, Element questionnaireResponse) {
if (!questionnaireItem.hasEnableWhen()) {
return true;
}
} else {
// and if not
String itemId = enable.getQuestion();
List<Element> items = new ArrayList<Element>();
element.getNamedChildren("item", items);
for(Element respItem : items) {
}
}
}
List<EnableWhenResult> evaluationResults = questionnaireItem.getEnableWhen()
.stream()
.map(enableCondition -> evaluateCondition(enableCondition, questionnaireResponse,
questionnaireItem.getLinkId()))
.collect(Collectors.toList());
return checkConditionResults(evaluationResults, questionnaireItem);
}
return enabled;
public boolean checkConditionResults(List<EnableWhenResult> evaluationResults,
QuestionnaireItemComponent questionnaireItem) {
if (questionnaireItem.hasEnableBehavior() && questionnaireItem.getEnableBehavior() == EnableWhenBehavior.ANY){
return evaluationResults.stream().anyMatch(EnableWhenResult::isEnabled);
} if (questionnaireItem.hasEnableBehavior() && questionnaireItem.getEnableBehavior() == EnableWhenBehavior.ALL){
return evaluationResults.stream().allMatch(EnableWhenResult::isEnabled);
}
//TODO: Throw exception? enableBehavior is mandatory when there are multiple conditions
return true;
}
public EnableWhenResult evaluateCondition(QuestionnaireItemEnableWhenComponent enableCondition,
Element questionnaireResponse, String linkId) {
//TODO: Fix EnableWhenResult stuff
List<Element> answerItems = findQuestionAnswers(questionnaireResponse,
enableCondition.getQuestion());
if (enableCondition.hasAnswer()) {
boolean result = answerItems.stream().anyMatch(answer -> evaluateAnswer(answer, enableCondition.getAnswer()));
return new EnableWhenResult(result, linkId, enableCondition, questionnaireResponse);
}
return new EnableWhenResult(false, linkId, enableCondition, questionnaireResponse);
}
private boolean evaluateAnswer(Element answer, Type expectedAnswer) {
org.hl7.fhir.r4.model.Type actualAnswer;
try {
actualAnswer = answer.asType();
} catch (FHIRException e) {
throw new RuntimeException("Unexpected answer type", e);
}
if (!actualAnswer.getClass().isAssignableFrom(expectedAnswer.getClass())) {
throw new RuntimeException("Expected answer and actual answer have incompatible types");
}
if (expectedAnswer instanceof Coding) {
return validateCodingAnswer((Coding)expectedAnswer, (Coding)actualAnswer);
} else if (expectedAnswer instanceof PrimitiveType) {
return actualAnswer.equalsShallow(expectedAnswer);
}
// TODO: Quantity, Attachment, reference?
throw new RuntimeException("Unimplemented answer type: " + expectedAnswer.getClass());
}
private List<Element> findQuestionAnswers(Element questionnaireResponse, String question) {
List<Element> matchingItems = questionnaireResponse.getChildren(ITEM_ELEMENT)
.stream()
.flatMap(i -> findSubItems(i).stream())
.filter(i -> hasLinkId(i, question))
.collect(Collectors.toList());
return matchingItems
.stream()
.flatMap(e -> extractAnswer(e).stream())
.collect(Collectors.toList());
}
private List<Element> extractAnswer(Element item) {
return item.getChildrenByName(ANSWER_ELEMENT)
.stream()
.flatMap(c -> c.getChildren().stream())
.collect(Collectors.toList());
}
private boolean validateCodingAnswer(Coding expectedAnswer, Coding actualAnswer) {
return compareSystems(expectedAnswer, actualAnswer) && compareCodes(expectedAnswer, actualAnswer);
}
private boolean compareCodes(Coding expectedCoding, Coding value) {
if (expectedCoding.hasCode() != value.hasCode()) {
return false;
}
if (expectedCoding.hasCode()) {
return expectedCoding.getCode().equals(value.getCode());
}
return true;
}
private boolean compareSystems(Coding expectedCoding, Coding value) {
if (expectedCoding.hasSystem() != value.hasSystem()) {
return false;
}
if (expectedCoding.hasSystem()) {
return expectedCoding.getSystem().equals(value.getSystem());
}
return true;
}
private List<Element> findSubItems(Element item) {
List<Element> results = item.getChildren(LINKID_ELEMENT)
.stream()
.flatMap(i -> findSubItems(i).stream())
.collect(Collectors.toList());
results.add(item);
return results;
}
private boolean hasLinkId(Element item, String linkId) {
Element linkIdChild = item.getNamedChild(LINKID_ELEMENT);
if (linkIdChild != null && linkIdChild.getValue().equals(linkId)){
return true;
}
return false;
}
}

7
hapi-fhir-validation/src/main/java/org/hl7/fhir/instance/validation/IEnableWhenEvaluator.java
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@ -3,16 +3,13 @@ package org.hl7.fhir.instance.validation;
import java.util.List;
import org.hl7.fhir.dstu3.model.Questionnaire.QuestionnaireItemComponent;
import org.hl7.fhir.dstu3.model.QuestionnaireResponse;
import org.hl7.fhir.dstu3.model.QuestionnaireResponse.QuestionnaireResponseItemComponent;
import org.hl7.fhir.r4.elementmodel.Element;
public interface IEnableWhenEvaluator {
public boolean isQuestionEnabled(org.hl7.fhir.r4.model.Questionnaire.QuestionnaireItemComponent questionnaireItem,
Element questionnaireResponse);
public boolean isQuestionEnabled(QuestionnaireItemComponent item, List<QuestionnaireResponseItemComponent> theResponseItems);
public boolean isQuestionEnabled(org.hl7.fhir.r4.model.Questionnaire.QuestionnaireItemComponent qItem,
Element element);
}