Examples with ResourcePath au.csiro.pathling.fhirpath.ResourcePath used on opensource projects

Example 46 with ResourcePath

use of au.csiro.pathling.fhirpath.ResourcePath in project pathling by aehrc.

the class PathTraversalOperator method getValueField.

@Nonnull
private static Column getValueField(@Nonnull final NonLiteralPath path, @Nonnull final String fieldName) {
    // If the input path is a ResourcePath, we look for a bare column. Otherwise, we will need to
    // extract it from a struct.
    final Column field;
    if (path instanceof ResourcePath) {
        final ResourcePath resourcePath = (ResourcePath) path;
        // When the value column of the ResourcePath is null, the path traversal results in null. This
        // can happen when attempting to do a path traversal on the result of a function like when.
        field = when(resourcePath.getValueColumn().isNull(), lit(null)).otherwise(resourcePath.getElementColumn(fieldName));
    } else {
        field = path.getValueColumn().getField(fieldName);
    }
    return field;
}