}
private void getCastToOperator(int tid) {
switch (tid) {
case ValueTag.XS_ANY_URI_TAG:
aCastToOp = new CastToAnyURIOperation();
break;
case ValueTag.XS_BASE64_BINARY_TAG:
aCastToOp = new CastToBase64BinaryOperation();
break;
case ValueTag.XS_BOOLEAN_TAG: