@Override
public ExampleSet apply(ExampleSet exampleSet) throws OperatorException {
String firstName = getParameterAsString(PARAMETER_FIRST_ATTRIBUTE);
String secondName = getParameterAsString(PARAMETER_SECOND_ATTRIBUTE);
AttributeRole firstRole = exampleSet.getAttributes().getRole(firstName);
AttributeRole secondRole = exampleSet.getAttributes().getRole(secondName);
if (firstRole == null) {
throw new AttributeNotFoundError(this, PARAMETER_FIRST_ATTRIBUTE, firstName);
}
if (secondRole == null) {
throw new AttributeNotFoundError(this, PARAMETER_SECOND_ATTRIBUTE, secondName);
}
String firstRoleName = firstRole.getSpecialName();
String secondRoleName = secondRole.getSpecialName();
firstRole.changeToRegular();
secondRole.changeToRegular();
firstRole.setSpecial(secondRoleName);
secondRole.setSpecial(firstRoleName);
return exampleSet;
}
public NonSpecialAttributesExampleSet(ExampleSet exampleSet) {
this.parent = (ExampleSet) exampleSet.clone();
Iterator<AttributeRole> s = this.parent.getAttributes().specialAttributes();
while (s.hasNext()) {
AttributeRole attributeRole = s.next();
if (attributeRole.isSpecial()) {
attributeRole.changeToRegular();
}
}
}
