Examples with Expression org.hl7.fhir.r4b.model.Expression used on opensource projects

Example 81 with Expression

use of org.hl7.fhir.r4b.model.Expression in project org.hl7.fhir.core by hapifhir.

the class QuestionnaireRenderer method addExpression.

private void addExpression(Piece p, Expression exp, String label, String url) {
    XhtmlNode x = new XhtmlNode(NodeType.Element, "li").style("font-size: 11px");
    p.addHtml(x);
    x.ah(url).tx(label);
    x.tx(": ");
    x.code(exp.getExpression());
}

Example 82 with Expression

use of org.hl7.fhir.r4b.model.Expression in project pathling by aehrc.

the class ReverseResolveFunction method invoke.

@Nonnull
@Override
public FhirPath invoke(@Nonnull final NamedFunctionInput input) {
    checkUserInput(input.getInput() instanceof ResourcePath, "Input to " + NAME + " function must be a resource: " + input.getInput().getExpression());
    final ResourcePath inputPath = (ResourcePath) input.getInput();
    final String expression = NamedFunction.expressionFromInput(input, NAME);
    checkUserInput(input.getArguments().size() == 1, "reverseResolve function accepts a single argument: " + expression);
    final FhirPath argument = input.getArguments().get(0);
    checkUserInput(argument instanceof ReferencePath, "Argument to reverseResolve function must be a Reference: " + argument.getExpression());
    final ReferencePath referencePath = (ReferencePath) argument;
    // Check that the input type is one of the possible types specified by the argument.
    final Set<ResourceType> argumentTypes = ((ReferencePath) argument).getResourceTypes();
    final ResourceType inputType = inputPath.getResourceType();
    checkUserInput(argumentTypes.contains(inputType), "Reference in argument to reverseResolve does not support input resource type: " + expression);
    // Do a left outer join from the input to the argument dataset using the reference field in the
    // argument.
    final Column joinCondition = referencePath.getResourceEquality(inputPath);
    final Dataset<Row> dataset = join(referencePath.getDataset(), inputPath.getDataset(), joinCondition, JoinType.RIGHT_OUTER);
    // Check the argument for information about the current resource that it originated from - if it
    // is not present, reverse reference resolution will not be possible.
    final NonLiteralPath nonLiteralArgument = (NonLiteralPath) argument;
    checkUserInput(nonLiteralArgument.getCurrentResource().isPresent(), "Argument to reverseResolve must be an element that is navigable from a " + "target resource type: " + expression);
    final ResourcePath currentResource = nonLiteralArgument.getCurrentResource().get();
    final Optional<Column> thisColumn = inputPath.getThisColumn();
    // TODO: Consider removing in the future once we separate ordering from element ID.
    // Create an synthetic element ID column for reverse resolved resources.
    final Column currentResourceValue = currentResource.getValueColumn();
    final WindowSpec windowSpec = Window.partitionBy(inputPath.getIdColumn(), inputPath.getOrderingColumn()).orderBy(currentResourceValue);
    // row_number() is 1-based, and we use 0-based indexes - thus (minus(1)).
    final Column currentResourceIndex = when(currentResourceValue.isNull(), lit(null)).otherwise(row_number().over(windowSpec).minus(lit(1)));
    // We need to add the synthetic EID column to the parser context so that it can be used within
    // joins in certain situations, e.g. extract.
    final Column syntheticEid = inputPath.expandEid(currentResourceIndex);
    final DatasetWithColumn datasetWithEid = QueryHelpers.createColumn(dataset, syntheticEid);
    input.getContext().getNodeIdColumns().putIfAbsent(expression, datasetWithEid.getColumn());
    final ResourcePath result = currentResource.copy(expression, datasetWithEid.getDataset(), inputPath.getIdColumn(), Optional.of(syntheticEid), currentResource.getValueColumn(), false, thisColumn);
    result.setCurrentResource(currentResource);
    return result;
}

Example 83 with Expression

use of org.hl7.fhir.r4b.model.Expression in project pathling by aehrc.

the class TranslateFunction method invoke.

@Nonnull
@Override
public FhirPath invoke(@Nonnull final NamedFunctionInput input) {
    validateInput(input);
    final ElementPath inputPath = (ElementPath) input.getInput();
    final ParserContext inputContext = input.getContext();
    final Column idColumn = inputPath.getIdColumn();
    final Column conceptColumn = inputPath.getValueColumn();
    final boolean isCodeableConcept = isCodeableConcept(inputPath);
    final Column codingArrayCol = isCodeableConcept ? conceptColumn.getField("coding") : when(conceptColumn.isNotNull(), array(conceptColumn)).otherwise(lit(null));
    // The definition of the result is always the Coding element.
    @SuppressWarnings("OptionalGetWithoutIsPresent") final ElementDefinition resultDefinition = isCodeableConcept ? inputPath.getChildElement("coding").get() : inputPath.getDefinition().get();
    // Prepare the data which will be used within the map operation. All of these things must be
    // Serializable.
    @SuppressWarnings("OptionalGetWithoutIsPresent") final TerminologyServiceFactory terminologyServiceFactory = inputContext.getTerminologyServiceFactory().get();
    final Arguments arguments = Arguments.of(input);
    final String conceptMapUrl = arguments.getValue(0, String.class);
    final boolean reverse = arguments.getValueOr(1, DEFAULT_REVERSE);
    final String equivalence = arguments.getValueOr(2, DEFAULT_EQUIVALENCE);
    final Dataset<Row> dataset = inputPath.getDataset();
    final MapperWithPreview<List<SimpleCoding>, Row[], ConceptTranslator> mapper = new TranslateMapperWithPreview(MDC.get("requestId"), terminologyServiceFactory, conceptMapUrl, reverse, Strings.parseCsvList(equivalence, wrapInUserInputError(ConceptMapEquivalence::fromCode)));
    final Dataset<Row> translatedDataset = SqlExtensions.mapWithPartitionPreview(dataset, codingArrayCol, SimpleCodingsDecoders::decodeList, mapper, StructField.apply("result", DataTypes.createArrayType(CodingEncoding.DATA_TYPE), true, Metadata.empty()));
    // The result is an array of translations per each input element, which we now
    // need to explode in the same way as for path traversal, creating unique element ids.
    final MutablePair<Column, Column> valueAndEidColumns = new MutablePair<>();
    final Dataset<Row> resultDataset = inputPath.explodeArray(translatedDataset, translatedDataset.col("result"), valueAndEidColumns);
    // Construct a new result expression.
    final String expression = expressionFromInput(input, NAME);
    return ElementPath.build(expression, resultDataset, idColumn, Optional.of(valueAndEidColumns.getRight()), valueAndEidColumns.getLeft(), false, inputPath.getCurrentResource(), inputPath.getThisColumn(), resultDefinition);
}

Example 84 with Expression

use of org.hl7.fhir.r4b.model.Expression in project pathling by aehrc.

the class ElementPath method getInstance.

@Nonnull
private static ElementPath getInstance(@Nonnull final String expression, @Nonnull final Dataset<Row> dataset, @Nonnull final Column idColumn, @Nonnull final Optional<Column> eidColumn, @Nonnull final Column valueColumn, final boolean singular, @Nonnull final Optional<ResourcePath> currentResource, @Nonnull final Optional<Column> thisColumn, @Nonnull final FHIRDefinedType fhirType) {
    // Look up the class that represents an element with the specified FHIR type.
    final Class<? extends ElementPath> elementPathClass = ElementDefinition.elementClassForType(fhirType).orElse(ElementPath.class);
    final DatasetWithColumnMap datasetWithColumns = eidColumn.map(eidCol -> createColumns(dataset, eidCol, valueColumn)).orElseGet(() -> createColumns(dataset, valueColumn));
    try {
        // Call its constructor and return.
        final Constructor<? extends ElementPath> constructor = elementPathClass.getDeclaredConstructor(String.class, Dataset.class, Column.class, Optional.class, Column.class, boolean.class, Optional.class, Optional.class, FHIRDefinedType.class);
        return constructor.newInstance(expression, datasetWithColumns.getDataset(), idColumn, eidColumn.map(datasetWithColumns::getColumn), datasetWithColumns.getColumn(valueColumn), singular, currentResource, thisColumn, fhirType);
    } catch (final NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
        throw new RuntimeException("Problem building an ElementPath class", e);
    }
}

Example 85 with Expression

use of org.hl7.fhir.r4b.model.Expression in project pathling by aehrc.

the class CodingLiteralPathTest method roundTripWithQuotedComponentWithComma.

@Test
void roundTripWithQuotedComponentWithComma() {
    final String expression = "http://snomed.info/sct|'46,2'|http://snomed.info/sct/32506021000036107/version/20201231";
    final CodingLiteralPath codingLiteralPath = CodingLiteralPath.fromString(expression, inputContext);
    final Coding literalValue = codingLiteralPath.getLiteralValue();
    assertEquals("http://snomed.info/sct", literalValue.getSystem());
    assertEquals("http://snomed.info/sct/32506021000036107/version/20201231", literalValue.getVersion());
    assertEquals("46,2", literalValue.getCode());
    final String actualExpression = codingLiteralPath.getExpression();
    assertEquals(expression, actualExpression);
}