code: protected void validate(String operationType) throws Exception
  	{
  		super.validate(operationType);
  
  		MPSString propkey_validator = new MPSString();
  		propkey_validator.setConstraintIsReq(MPSConstants.DELETE_CONSTRAINT, true);
  		propkey_validator.setConstraintMaxStrLen(MPSConstants.GENERIC_CONSTRAINT, 256);
  		propkey_validator.setConstraintMinStrLen(MPSConstants.GENERIC_CONSTRAINT, 1);
  		propkey_validator.setConstraintIsReq(MPSConstants.MODIFY_CONSTRAINT, true);
  		propkey_validator.validate(operationType, propkey, "\"propkey\"");
  		
  		MPSString propvalue_validator = new MPSString();
  		propvalue_validator.setConstraintMaxStrLen(MPSConstants.GENERIC_CONSTRAINT, 2000);
  		propvalue_validator.validate(operationType, propvalue, "\"propvalue\"");
  		
  	}
docs: <pre>
  Performs generic data validation for the operation to be performed
  </pre>