Problem in AttributeRole

vahid_erad

@Override
		public void doWork() throws OperatorException 
		{
			File file = getParameterAsFile("example_set_file");
			ExampleSet eSet = exampleSetInput.getData();
			try 
			{	
				Attribute sum = AttributeFactory.createAttribute("sum", Attributes.SPECIAL);

				eSet.getExampleTable().addAttribute(sum);
				eSet.getAttributes().add(eSet.getAttributes().findRoleByName("id"));
			}
			catch (IOException e) 
			{
				throw new UserError(this, 303, file, e.getMessage());
			}
			exampleSetOutput.deliver(eSet);
		}

What is worng in the code??

Nils_Woehler

Hi,

what should be the problem with this code? Do you get an error when you are trying to compile it?
Or does it behave unexpectedly?

Best,
Nils

vahid_erad

I have a error
In this line i have error

<Code>eSet.getAttributes().add(eSet.getAttributes().findRoleByName("id"));</Code>

I can't set the attribute to ID role

Nils_Woehler

What's the purpose of this line?
You are getting the current ID Attribute and try to set it again. This does not work.

If you want to set 'sum' as ID Attribute use this function

setSpecialAttribute(Attribute attribute, String specialName)

Best,
Nils