private static Map<String, double[]> parseVectorDictionary(
SupportVectorMachineModel supportVectorMachineModel) {
VectorDictionary vectorDictionary = supportVectorMachineModel.getVectorDictionary();
VectorFields vectorFields = vectorDictionary.getVectorFields();
List<FieldRef> fieldRefs = vectorFields.getFieldRefs();
Map<String, double[]> result = new LinkedHashMap<>();
List<VectorInstance> vectorInstances = vectorDictionary.getVectorInstances();
for (VectorInstance vectorInstance : vectorInstances) {
String id = vectorInstance.getId();
if (id == null) {
throw new InvalidFeatureException(vectorInstance);
}
Array array = vectorInstance.getArray();
RealSparseArray sparseArray = vectorInstance.getREALSparseArray();
List<? extends Number> values;
if (array != null && sparseArray == null) {
values = ArrayUtil.asNumberList(array);
} else if (array == null && sparseArray != null) {
values = SparseArrayUtil.asNumberList(sparseArray);
} else {
throw new InvalidFeatureException(vectorInstance);
} // End if
if (fieldRefs.size() != values.size()) {
throw new InvalidFeatureException(vectorInstance);
}
double[] vector = Doubles.toArray(values);
result.put(id, vector);
}
return result;
}
private double[] createInput(EvaluationContext context) {
SupportVectorMachineModel supportVectorMachineModel = getModel();
VectorDictionary vectorDictionary = supportVectorMachineModel.getVectorDictionary();
VectorFields vectorFields = vectorDictionary.getVectorFields();
List<FieldRef> fieldRefs = vectorFields.getFieldRefs();
double[] result = new double[fieldRefs.size()];
for (int i = 0; i < fieldRefs.size(); i++) {
FieldRef fieldRef = fieldRefs.get(i);
FieldValue value = ExpressionUtil.evaluate(fieldRef, context);
if (value == null) {
throw new MissingValueException(fieldRef.getField(), vectorFields);
}
result[i] = (value.asNumber()).doubleValue();
}
return result;
}
