/// <summary>
/// This <c>read</c> method is used to perform deserialization
/// of the provided node object using a delegate converter. This is
/// typically another <c>Composite</c> converter, or if the
/// node is an attribute a <c>Primitive</c> converter. When
/// the delegate converter has completed the deserialized value is
/// assigned to the contact.
/// </summary>
/// <param name="node">
/// this is the node that contains the contact value
/// </param>
/// <param name="source">
/// the type of the object that is being deserialized
/// </param>
/// <param name="label">
/// this is the label used to create the converter
/// </param>
public Object Read(InputNode node, Object source, Label label) {
Object object = ReadObject(node, source, label);
if(object == null) {
Position line = node.getPosition();
Class expect = type.Type;
if(source != null) {
expect = source.getClass();
}
if(label.isRequired() && revision.IsEqual()) {
throw new ValueRequiredException("Empty value for %s in %s at %s", label, expect, line);
}
} else {
if(object != label.getEmpty(context)) {
criteria.Set(label, object);
}
}
return object;
}