public GenericUDAFEvaluator getEvaluator()

in src/main/java/org/apache/datasketches/hive/hll/UnionSketchUDAF.java [74:104]

• 23 lines of code
• 7 McCabe index (conditional complexity)

  public GenericUDAFEvaluator getEvaluator(final GenericUDAFParameterInfo info) throws SemanticException {
    final ObjectInspector[] inspectors = info.getParameterObjectInspectors();

    if (inspectors.length < 1) {
      throw new UDFArgumentException("Please specify at least 1 argument");
    }

    if (inspectors.length > 3) {
      throw new UDFArgumentTypeException(inspectors.length - 1, "Please specify no more than 3 arguments");
    }

    ObjectInspectorValidator.validateGivenPrimitiveCategory(inspectors[0], 0, PrimitiveCategory.BINARY);

    // Validate second argument if present
    if (inspectors.length > 1) {
      ObjectInspectorValidator.validateIntegralParameter(inspectors[1], 1);
      if (!ObjectInspectorUtils.isConstantObjectInspector(inspectors[1])) {
        throw new UDFArgumentTypeException(1, "The second argument must be a constant");
      }
    }

    // Validate third argument if present
    if (inspectors.length > 2) {
      ObjectInspectorValidator.validateGivenPrimitiveCategory(inspectors[2], 2, PrimitiveCategory.STRING);
      if (!ObjectInspectorUtils.isConstantObjectInspector(inspectors[2])) {
        throw new UDFArgumentTypeException(2, "The third argument must be a constant");
      }
    }

    return new UnionSketchUDAFEvaluator();
  }