Problem in AttributeRole

vahid_eradvahid_erad Member Posts: 2 image Contributor I
edited November 2018 in Help 
@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??
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Answers

  • Nils_WoehlerNils_Woehler Member Posts: 463 image Maven
    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_eradvahid_erad Member Posts: 2 image Contributor I
    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_WoehlerNils_Woehler Member Posts: 463 image Maven
    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
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