protected Instance readInstanceSparse()

in samoa-instances/src/main/java/org/apache/samoa/instances/AvroLoader.java [138:203]
50 lines of code
14 McCabe index (conditional complexity)

  protected Instance readInstanceSparse(GenericRecord record) {

    Instance instance = new SparseInstance(1.0, null);
    int numAttribute = -1;
    ArrayList<Double> attributeValues = new ArrayList<Double>();
    List<Integer> indexValues = new ArrayList<Integer>();

    for (Attribute attribute : attributes) {
      numAttribute++;
      Object value = record.get(attribute.name);

      boolean isNumeric = attributes.get(numAttribute).isNumeric();
      boolean isNominal = attributes.get(numAttribute).isNominal();

      /** If value is empty/null iterate to the next attribute. **/
      if (value == null)
        continue;

      if (isNumeric)
      {
        if (value instanceof Double) {
          Double v = (double) value;
          //if (Double.isFinite(v))
          if (!Double.isNaN(v) && !Double.isInfinite(v))
            this.setSparseValue(instance, indexValues, attributeValues, numAttribute, (double) value);
        }
        else if (value instanceof Long)
          this.setSparseValue(instance, indexValues, attributeValues, numAttribute, (long) value);
        else if (value instanceof Integer)
          this.setSparseValue(instance, indexValues, attributeValues, numAttribute, (int) value);
        else
          throw new RuntimeException(AVRO_LOADER_INVALID_TYPE_ERROR + " : " + attribute.name);
      }
      else if (isNominal)
      {
        double valueAttribute;

        if (!(value instanceof EnumSymbol))
          throw new RuntimeException(AVRO_LOADER_INVALID_TYPE_ERROR + " : " + attribute.name);

        EnumSymbol enumSymbolalue = (EnumSymbol) value;

        String stringValue = enumSymbolalue.toString();

        if (("?".equals(stringValue)) || (stringValue == null)) {
          valueAttribute = Double.NaN;
        } else {
          valueAttribute = this.instanceInformation.attribute(numAttribute).indexOfValue(stringValue);
        }

        this.setSparseValue(instance, indexValues, attributeValues, numAttribute, valueAttribute);
      }
    }

    int[] arrayIndexValues = new int[attributeValues.size()];
    double[] arrayAttributeValues = new double[attributeValues.size()];

    for (int i = 0; i < arrayIndexValues.length; i++) {
      arrayIndexValues[i] = indexValues.get(i).intValue();
      arrayAttributeValues[i] = attributeValues.get(i).doubleValue();
    }

    instance.addSparseValues(arrayIndexValues, arrayAttributeValues, this.instanceInformation.numAttributes());
    return instance;

  }