Examples with Expression org.hl7.fhir.r4.model.Expression used on opensource projects

Example 71 with Expression

use of org.hl7.fhir.r4.model.Expression in project org.hl7.fhir.core by hapifhir.

the class GraphQLEngine method processValues.

private void processValues(Resource context, Selection sel, Property prop, ObjectValue target, List<Base> values, boolean extensionMode, boolean inheritedList, String suffix) throws EGraphQLException, FHIRException {
    boolean il = false;
    Argument arg = null;
    ExpressionNode expression = null;
    if (sel.getField().hasDirective("slice")) {
        Directive dir = sel.getField().directive("slice");
        String s = ((StringValue) dir.getArguments().get(0).getValues().get(0)).getValue();
        if (s.equals("$index"))
            expression = magicExpression;
        else
            expression = fpe.parse(s);
    }
    if (// special: instruction to drop this node...
    sel.getField().hasDirective("flatten"))
        il = prop.isList() && !sel.getField().hasDirective("first");
    else if (sel.getField().hasDirective("first")) {
        if (expression != null)
            throw new FHIRException("You cannot mix @slice and @first");
        arg = target.addField(sel.getField().getAlias() + suffix, listStatus(sel.getField(), inheritedList));
    } else if (expression == null)
        arg = target.addField(sel.getField().getAlias() + suffix, listStatus(sel.getField(), prop.isList() || inheritedList));
    int index = 0;
    for (Base value : values) {
        String ss = "";
        if (expression != null) {
            if (expression == magicExpression)
                ss = suffix + '.' + Integer.toString(index);
            else
                ss = suffix + '.' + fpe.evaluateToString(null, null, null, value, expression);
            if (!sel.getField().hasDirective("flatten"))
                arg = target.addField(sel.getField().getAlias() + suffix, listStatus(sel.getField(), prop.isList() || inheritedList));
        }
        if (value.isPrimitive() && !extensionMode) {
            if (!sel.getField().getSelectionSet().isEmpty())
                throw new EGraphQLException("Encountered a selection set on a scalar field type");
            processPrimitive(arg, value);
        } else {
            if (sel.getField().getSelectionSet().isEmpty())
                throw new EGraphQLException("No Fields selected on a complex object");
            if (arg == null)
                processObject(context, value, target, sel.getField().getSelectionSet(), il, ss);
            else {
                ObjectValue n = new ObjectValue();
                arg.addValue(n);
                processObject(context, value, n, sel.getField().getSelectionSet(), il, ss);
            }
        }
        if (sel.getField().hasDirective("first"))
            return;
        index++;
    }
}

Example 72 with Expression

use of org.hl7.fhir.r4.model.Expression in project org.hl7.fhir.core by hapifhir.

the class GraphDefinitionEngine method processLinkPath.

private void processLinkPath(String focusPath, Resource focus, GraphDefinitionLinkComponent link, int depth) {
    String path = focusPath + " -> " + link.getPath();
    check(link.hasPath(), "Path is needed at " + path);
    check(!link.hasSliceName(), "SliceName is not yet supported at " + path);
    ExpressionNode node;
    if (link.getPathElement().hasUserData(TAG_NAME)) {
        node = (ExpressionNode) link.getPathElement().getUserData(TAG_NAME);
    } else {
        node = engine.parse(link.getPath());
        link.getPathElement().setUserData(TAG_NAME, node);
    }
    List<Base> matches = engine.evaluate(null, focus, focus, focus, node);
    check(!validating || matches.size() >= (link.hasMin() ? link.getMin() : 0), "Link at path " + path + " requires at least " + link.getMin() + " matches, but only found " + matches.size());
    check(!validating || matches.size() <= (link.hasMax() ? Integer.parseInt(link.getMax()) : Integer.MAX_VALUE), "Link at path " + path + " requires at most " + link.getMax() + " matches, but found " + matches.size());
    for (Base sel : matches) {
        // todo: should a URL be ok?
        check(sel.fhirType().equals("Reference"), "Selected node from an expression must be a Reference");
        ReferenceResolution res = services.lookup(appInfo, focus, (Reference) sel);
        if (res != null) {
            // todo
            check(res.getTargetContext() != focus, "how to handle contained resources is not yet resolved");
            for (GraphDefinitionLinkTargetComponent tl : link.getTarget()) {
                if (tl.getType().equals(res.getTarget().fhirType())) {
                    Resource r = (Resource) res.getTarget();
                    if (!isInBundle(r)) {
                        addToBundle(r);
                        for (GraphDefinitionLinkComponent l : graphDefinition.getLink()) {
                            processLink(focus.fhirType(), r, l, depth + 1);
                        }
                    }
                }
            }
        }
    }
}

Example 73 with Expression

use of org.hl7.fhir.r4.model.Expression in project org.hl7.fhir.core by hapifhir.

the class Utilities method fhirPathToXPath.

/**
 * Only handles simple FHIRPath expressions of the type produced by the validator
 *
 * @param path
 * @return
 */
public static String fhirPathToXPath(String path) {
    String[] p = path.split("\\.");
    CommaSeparatedStringBuilder b = new CommaSeparatedStringBuilder(".");
    int i = 0;
    while (i < p.length) {
        String s = p[i];
        if (s.contains("[")) {
            String si = s.substring(s.indexOf("[") + 1, s.length() - 1);
            if (!Utilities.isInteger(si))
                throw new FHIRException("The FHIRPath expression '" + path + "' is not valid");
            s = s.substring(0, s.indexOf("[")) + "[" + Integer.toString(Integer.parseInt(si) + 1) + "]";
        }
        if (i < p.length - 1 && p[i + 1].startsWith(".ofType(")) {
            i++;
            s = s + capitalize(p[i].substring(8, p.length - 1));
        }
        b.append(s);
        i++;
    }
    return b.toString();
}

Example 74 with Expression

use of org.hl7.fhir.r4.model.Expression in project org.hl7.fhir.core by hapifhir.

the class InstanceValidator method buildIdentifierExpression.

private void buildIdentifierExpression(ElementDefinition ed, StringBuilder expression, String discriminator, Identifier ii) throws DefinitionException {
    if (ii.hasExtension())
        throw new DefinitionException(context.formatMessage(I18nConstants.UNSUPPORTED_IDENTIFIER_PATTERN__EXTENSIONS_ARE_NOT_ALLOWED__FOR_DISCRIMINATOR_FOR_SLICE_, discriminator, ed.getId()));
    boolean first = true;
    expression.append(discriminator + ".where(");
    if (ii.hasSystem()) {
        first = false;
        expression.append("system = '" + ii.getSystem() + "'");
    }
    if (ii.hasValue()) {
        if (first)
            first = false;
        else
            expression.append(" and ");
        expression.append("value = '" + ii.getValue() + "'");
    }
    if (ii.hasUse()) {
        if (first)
            first = false;
        else
            expression.append(" and ");
        expression.append("use = '" + ii.getUse() + "'");
    }
    if (ii.hasType()) {
        if (first)
            first = false;
        else
            expression.append(" and ");
        buildCodeableConceptExpression(ed, expression, TYPE, ii.getType());
    }
    if (first) {
        throw new DefinitionException(context.formatMessage(I18nConstants.UNSUPPORTED_IDENTIFIER_PATTERN_NO_PROPERTY_NOT_SUPPORTED_FOR_DISCRIMINATOR_FOR_SLICE, discriminator, ed.getId(), ii.fhirType()));
    }
    expression.append(").exists()");
}

Example 75 with Expression

use of org.hl7.fhir.r4.model.Expression in project org.hl7.fhir.core by hapifhir.

the class InstanceValidator method buildCodingExpression.

private void buildCodingExpression(ElementDefinition ed, StringBuilder expression, String discriminator, Coding c) throws DefinitionException {
    if (c.hasExtension())
        throw new DefinitionException(context.formatMessage(I18nConstants.UNSUPPORTED_CODEABLECONCEPT_PATTERN__EXTENSIONS_ARE_NOT_ALLOWED__FOR_DISCRIMINATOR_FOR_SLICE_, discriminator, ed.getId()));
    expression.append(discriminator + ".where(");
    boolean first = true;
    if (c.hasSystem()) {
        first = false;
        expression.append("system = '" + c.getSystem() + "'");
    }
    if (c.hasVersion()) {
        if (first)
            first = false;
        else
            expression.append(" and ");
        expression.append("version = '" + c.getVersion() + "'");
    }
    if (c.hasCode()) {
        if (first)
            first = false;
        else
            expression.append(" and ");
        expression.append("code = '" + c.getCode() + "'");
    }
    if (c.hasDisplay()) {
        if (first)
            first = false;
        else
            expression.append(" and ");
        expression.append("display = '" + c.getDisplay() + "'");
    }
    if (first) {
        throw new DefinitionException(context.formatMessage(I18nConstants.UNSUPPORTED_IDENTIFIER_PATTERN_NO_PROPERTY_NOT_SUPPORTED_FOR_DISCRIMINATOR_FOR_SLICE, discriminator, ed.getId(), c.fhirType()));
    }
    expression.append(").exists()");
}