Examples with PendingExpressionState io.github.linuxforhealth.hl7.resource.PendingExpressionState used on opensource projects

Example 1 with PendingExpressionState

use of io.github.linuxforhealth.hl7.resource.PendingExpressionState in project hl7v2-fhir-converter by LinuxForHealth.

the class ExpressionUtility method evaluate.

/**
 * Evaluates map of expression and generates ResourceEvaluationResult object.
 *
 * @param dataSource The data extractor to be used
 * @param context The context in use
 * @param baseValue The value to evaluate
 * @param expressionMap Map of expressions
 * @return {@link ResourceEvaluationResult}
 */
public static ResourceEvaluationResult evaluate(InputDataExtractor dataSource, Map<String, EvaluationResult> context, EvaluationResult baseValue, Map<String, Expression> expressionMap) {
    try {
        Map<String, Expression> expressionsToEvaluateLater = new HashMap<>();
        Map<String, EvaluationResult> localContext = new HashMap<>(context);
        localContext.put(Constants.NULL_VAR_NAME, new EmptyEvaluationResult());
        // initialize the map and list to collect values
        List<ResourceValue> additionalResolveValues = new ArrayList<>();
        Map<String, Object> resolveValues = new HashMap<>();
        for (Entry<String, Expression> entry : expressionMap.entrySet()) {
            Expression exp = entry.getValue();
            LOGGER.debug(EVALUATING, entry.getKey(), entry.getValue());
            if (exp.isEvaluateLater()) {
                expressionsToEvaluateLater.put(entry.getKey(), entry.getValue());
            } else {
                processExpression(dataSource, baseValue, localContext, additionalResolveValues, resolveValues, entry);
            }
        }
        resolveValues.values().removeIf(Objects::isNull);
        return new ResourceEvaluationResult(resolveValues, additionalResolveValues, new PendingExpressionState(expressionsToEvaluateLater, context));
    } catch (RequiredConstraintFailureException e) {
        LOGGER.warn("Resource Constraint condition not satisfied.");
        LOGGER.debug("Resource Constraint condition not satisfied, exception", e);
        return null;
    } catch (IllegalArgumentException | IllegalStateException | DataExtractionException e) {
        LOGGER.error("Exception during resource evaluation");
        LOGGER.debug("Exception during resource evaluation reason ", e);
        return null;
    }
}