How to use

isOptional

method

in

org.jibx.binding.model.StructureElement

/**
 * Check if a <structure> element represents a type derivation. If the element is empty, has no name or property,
 * is required, and is a mapping reference, then it can be handled as a type derivation.
 * 
 * @param struct
 * @return <code>true</code> if a type derivation, <code>false</code> if not
 */
private static boolean isTypeDerivation(StructureElement struct) {
  return struct.children().size() == 0 && !struct.hasName() && !struct.hasProperty() && !struct.isOptional()
    && (struct.getDeclaredType() != null || struct.getEffectiveMapping() != null);
}

if (struct.isOptional()) {
  m_context.addError("No schema equivalent for optional abstract mapping with attributes", comp);
} else {