// compute whether output data is sorted or not
new SortInfoSetter(this).visit();
if (!(skipInputOutputValidation || pigContext.inExplain || pigContext.inDumpSchema)) {
// Validate input/output file
new InputOutputFileValidatorVisitor(this, pigContext).visit();
}
BlackAndWhitelistValidator validator = new BlackAndWhitelistValidator(pigContext, this);
validator.validate();