code: protected void validate(String operationType) throws Exception
  	{
  		super.validate(operationType);
  
  		MPSString hostname_validator = new MPSString();
  		hostname_validator.setConstraintCharSetRegEx(MPSConstants.GENERIC_CONSTRAINT,"[ a-zA-Z0-9_#.:@=-]+");
  		hostname_validator.setConstraintMaxStrLen(MPSConstants.GENERIC_CONSTRAINT, 256);
  		hostname_validator.setConstraintMinStrLen(MPSConstants.GENERIC_CONSTRAINT, 1);
  		hostname_validator.validate(operationType, hostname, "\"hostname\"");
  		
  	}
docs: <pre>
  Performs generic data validation for the operation to be performed
  </pre>