#3 -- add F-Transform

src/main/java/ru/ulstu/controller/IndexController.java

@@ -82,11 +82,13 @@ public class IndexController {
 
     private void addChartToModel(TimeSeries timeSeries, String method, Model model) throws ExecutionException, InterruptedException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException, ModelingException {
         int countForecastPoints = timeSeries.getLength() > 20 ? 10 : timeSeries.getLength() / 3;
-        TimeSeries timeSeriesModel = timeSeriesService.smoothTimeSeries(timeSeries).getTimeSeries();
+        TimeSeries timeSeriesModel;
         ModelingResult modelingResult;
         if (method == null) {
+            timeSeriesModel = timeSeriesService.smoothTimeSeries(timeSeries).getTimeSeries();
             modelingResult = timeSeriesService.getForecast(timeSeries, countForecastPoints);
         } else {
+            timeSeriesModel = timeSeriesService.smoothTimeSeries(timeSeries, method).getTimeSeries();
             modelingResult = timeSeriesService.getForecast(timeSeries, method, countForecastPoints);
         }
         TimeSeries forecast = modelingResult.getTimeSeries();

src/main/java/ru/ulstu/method/MethodParamValue.java

@@ -16,4 +16,12 @@ public class MethodParamValue {
     public Number getValue() {
         return value;
     }
+
+    public Integer getIntValue() {
+        return value.intValue();
+    }
+
+    public void setValue(Number value) {
+        this.value = value;
+    }
 }

src/main/java/ru/ulstu/method/MethodParameter.java

@@ -1,8 +1,10 @@
 package ru.ulstu.method;
 
+import ru.ulstu.datamodel.ts.TimeSeries;
+
 import java.util.List;
 
-public abstract class MethodParameter implements Comparable {
+public abstract class MethodParameter implements Comparable<MethodParameter> {
     protected String name;
 
     public MethodParameter(String name) {
@@ -13,10 +15,10 @@ public abstract class MethodParameter implements Comparable {
         return name;
     }
 
-    public abstract List<Number> getAvailableValues();
+    public abstract List<Number> getAvailableValues(TimeSeries timeSeries);
 
     @Override
-    public int compareTo(Object o) {
+    public int compareTo(MethodParameter o) {
-        return this.name.compareTo(((MethodParameter) o).getName());
+        return this.name.compareTo(o.getName());
     }
 }

src/main/java/ru/ulstu/method/exponential/addtrendaddseason/AddTrendAddSeasonModel.java

@@ -1,5 +1,6 @@
 package ru.ulstu.method.exponential.addtrendaddseason;
 
+import ru.ulstu.datamodel.Model;
 import ru.ulstu.datamodel.ts.TimeSeries;
 import ru.ulstu.method.MethodParamValue;
 import ru.ulstu.method.MethodParameter;
@@ -13,7 +14,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-public class AddTrendAddSeasonModel extends ru.ulstu.datamodel.Model {
+public class AddTrendAddSeasonModel extends Model {
     private final ExponentialMethodParamValue<Alpha> alpha = new ExponentialMethodParamValue<>(Alpha.getInstance(), 0.5);
     private final ExponentialMethodParamValue<Beta> beta = new ExponentialMethodParamValue<>(Beta.getInstance(), 0.5);
     private final ExponentialMethodParamValue<Gamma> gamma = new ExponentialMethodParamValue<>(Gamma.getInstance(), 0.5);

src/main/java/ru/ulstu/method/exponential/addtrendnoseason/AddTrendNoSeasonModel.java

@@ -1,5 +1,6 @@
 package ru.ulstu.method.exponential.addtrendnoseason;
 
+import ru.ulstu.datamodel.Model;
 import ru.ulstu.datamodel.ts.TimeSeries;
 import ru.ulstu.method.MethodParamValue;
 import ru.ulstu.method.MethodParameter;
@@ -11,7 +12,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
-public class AddTrendNoSeasonModel extends ru.ulstu.datamodel.Model {
+public class AddTrendNoSeasonModel extends Model {
     private final ExponentialMethodParamValue<Alpha> alpha = new ExponentialMethodParamValue<>(Alpha.getInstance(), 0.5);
     private final ExponentialMethodParamValue<Beta> beta = new ExponentialMethodParamValue<>(Beta.getInstance(), 0.5);
     private final List<Double> smoothedComponent = new ArrayList<>();

src/main/java/ru/ulstu/method/exponential/notrendnoseason/NoTrendNoSeasonModel.java

@@ -1,5 +1,6 @@
 package ru.ulstu.method.exponential.notrendnoseason;
 
+import ru.ulstu.datamodel.Model;
 import ru.ulstu.datamodel.ts.TimeSeries;
 import ru.ulstu.method.MethodParamValue;
 import ru.ulstu.method.MethodParameter;
@@ -10,7 +11,7 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-public class NoTrendNoSeasonModel extends ru.ulstu.datamodel.Model {
+public class NoTrendNoSeasonModel extends Model {
     private final ExponentialMethodParamValue<Alpha> alpha = new ExponentialMethodParamValue<>(Alpha.getInstance(), 0.5);
     private final List<Double> smoothedComponent = new ArrayList<>();
 

src/main/java/ru/ulstu/method/exponential/parameter/ExponentialMethodParameter.java

@@ -1,6 +1,7 @@
 package ru.ulstu.method.exponential.parameter;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import ru.ulstu.datamodel.ts.TimeSeries;
 import ru.ulstu.method.MethodParameter;
 
 import java.util.ArrayList;
@@ -35,7 +36,7 @@ public abstract class ExponentialMethodParameter extends MethodParameter {
 
     @Override
     @JsonIgnore
-    public List<Number> getAvailableValues() {
+    public List<Number> getAvailableValues(TimeSeries timeSeries) {
         List<Number> values = new ArrayList<>();
         for (double i = minValue.doubleValue(); i <= maxValue.doubleValue(); i += optimizationStep.doubleValue()) {
             values.add(i);

src/main/java/ru/ulstu/method/ftransform/AComponent.java

@@ -0,0 +1,57 @@
+package ru.ulstu.method.ftransform;
+
+/**
+ * Треугольная функция принадлежности
+ */
+public class AComponent {
+    private int start;  //  левая граница треугольника
+    private int end;   // правая граница треугольника
+    private int top;  // вершина треугольника
+
+    public int getStart() {
+        return start;
+    }
+
+    public AComponent() {
+    }
+
+    public AComponent(int start, int top, int end) {
+        this.start = start;
+        this.top = top;
+        this.end = end;
+    }
+
+    public void setStart(int start) {
+        this.start = start;
+    }
+
+
+    public int getEnd() {
+        return end;
+    }
+
+    public void setEnd(int end) {
+        this.end = end;
+    }
+
+    public int getTop() {
+        return top;
+    }
+
+    public void setTop(int top) {
+        this.top = top;
+    }
+
+    public double getValueAtPoint(int pointIndex) {
+        if (pointIndex == this.getTop()) {
+            return 1;
+        } else if ((pointIndex >= this.getEnd()) || (pointIndex <= this.getStart())) {
+            return 0;
+        } else if (pointIndex < this.getTop()) {
+            return (double) (pointIndex - this.getStart()) / (this.getTop() - this.getStart());
+        } else if (pointIndex > this.getTop()) {
+            return (double) -(pointIndex - this.getEnd()) / (this.getEnd() - this.getTop());
+        }
+        return 0;
+    }
+}

src/main/java/ru/ulstu/method/ftransform/FTransform.java

@@ -0,0 +1,87 @@
+package ru.ulstu.method.ftransform;
+
+import org.springframework.stereotype.Component;
+import ru.ulstu.datamodel.Model;
+import ru.ulstu.datamodel.ts.TimeSeries;
+import ru.ulstu.method.Method;
+import ru.ulstu.method.MethodParamValue;
+import ru.ulstu.method.MethodParameter;
+
+import java.util.List;
+
+@Component
+public class FTransform extends Method {
+
+    @Override
+    protected FTransformModel getModelOfValidTimeSeries(TimeSeries ts,
+                                                        List<MethodParamValue> parameters) {
+        FTransformModel model = new FTransformModel(ts, parameters);
+        List<AComponent> aComponents = generateAComponents(ts, model.getNumberOfCoveredPoints().getIntValue(), model.getAComponents());
+        ;
+        TimeSeries piecewiseLinearTrend = model.getPiecewiseLinearTrend();
+        TimeSeries tsModel = model.getTimeSeriesModel();
+
+        for (AComponent aComponent : aComponents) {
+            double sum1 = 0;
+            double sum2 = 0;
+            for (int j = 0; j < ts.getLength(); j++) {
+                double membership = aComponent.getValueAtPoint(j);
+                sum1 += membership * ts.getNumericValue(j);
+                sum2 += membership;
+            }
+            piecewiseLinearTrend.addValue(ts.getValue(aComponent.getTop()), sum1 / sum2);
+            tsModel.addValue(ts.getValue(aComponent.getTop()), sum1 / sum2);
+        }
+        return model;
+    }
+
+    private List<AComponent> generateAComponents(TimeSeries ts, int numberOfCoveredPoints, List<AComponent> piecewiseLinearTrend) {
+        long deltaForTriangle = Math.round(numberOfCoveredPoints / 2.0);
+        int currentPoint = 0;
+        while (currentPoint < ts.getLength()) {
+            int startPoint = (currentPoint == 0)
+                    ? 0
+                    : piecewiseLinearTrend.get(piecewiseLinearTrend.size() - 1).getTop();
+            AComponent bf = new AComponent(startPoint, currentPoint, currentPoint + numberOfCoveredPoints / 2);
+            if (bf.getStart() < 0) {
+                bf.setStart(0);
+            }
+            if (bf.getEnd() > ts.getLength() - 1) {
+                bf.setEnd(ts.getLength() - 1);
+            }
+
+            if (bf.getTop() > ts.getLength() - 1) {
+                bf.setTop(ts.getLength() - 1);
+            }
+
+            piecewiseLinearTrend.add(bf);
+            currentPoint += deltaForTriangle;
+        }
+        if (piecewiseLinearTrend.get(piecewiseLinearTrend.size() - 1).getEnd() != piecewiseLinearTrend.get(piecewiseLinearTrend.size() - 1).getTop()) {
+            AComponent bf = new AComponent(piecewiseLinearTrend.get(piecewiseLinearTrend.size() - 1).getTop(),
+                    piecewiseLinearTrend.get(piecewiseLinearTrend.size() - 1).getEnd(),
+                    piecewiseLinearTrend.get(piecewiseLinearTrend.size() - 1).getEnd());
+            piecewiseLinearTrend.add(bf);
+        }
+        return piecewiseLinearTrend;
+    }
+
+    @Override
+    protected TimeSeries getForecastWithValidParams(Model model, TimeSeries forecast) {
+        FTransformModel fTransformModel = (FTransformModel) model;
+        for (int t = 1; t < forecast.getLength(); t++) {
+            forecast.getValues().get(t).setValue(fTransformModel.getPiecewiseLinearTrend().getLastValue().getValue());
+        }
+        return forecast;
+    }
+
+    @Override
+    public List<MethodParameter> getAvailableParameters() {
+        return FTransformModel.getAvailableParameters();
+    }
+
+    @Override
+    public String getName() {
+        return "F - преобразование";
+    }
+}

src/main/java/ru/ulstu/method/ftransform/FTransformModel.java

@@ -0,0 +1,43 @@
+package ru.ulstu.method.ftransform;
+
+import ru.ulstu.datamodel.Model;
+import ru.ulstu.datamodel.ts.TimeSeries;
+import ru.ulstu.method.MethodParamValue;
+import ru.ulstu.method.MethodParameter;
+import ru.ulstu.method.ftransform.parameter.NumberOfCoveredPoints;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class FTransformModel extends Model {
+    private final MethodParamValue numberOfCoveredPoints = new MethodParamValue(NumberOfCoveredPoints.getInstance(), 3);
+    private final List<AComponent> aComponents = new ArrayList<>();
+    private final TimeSeries piecewiseLinearTrend;
+
+    public FTransformModel(TimeSeries ts, List<MethodParamValue> parameters) {
+        super(ts);
+        piecewiseLinearTrend = new TimeSeries("Piecewise linear trend of ", ts.getKey());
+        for (MethodParamValue parameter : parameters) {
+            if (parameter.getParameter() instanceof NumberOfCoveredPoints) {
+                numberOfCoveredPoints.setValue(parameter.getValue());
+            }
+        }
+    }
+
+    public TimeSeries getPiecewiseLinearTrend() {
+        return piecewiseLinearTrend;
+    }
+
+    public List<AComponent> getAComponents() {
+        return aComponents;
+    }
+
+    public MethodParamValue getNumberOfCoveredPoints() {
+        return numberOfCoveredPoints;
+    }
+
+    public static List<MethodParameter> getAvailableParameters() {
+        return Collections.singletonList(NumberOfCoveredPoints.getInstance());
+    }
+}

src/main/java/ru/ulstu/method/ftransform/parameter/NumberOfCoveredPoints.java

@@ -0,0 +1,29 @@
+package ru.ulstu.method.ftransform.parameter;
+
+import ru.ulstu.datamodel.ts.TimeSeries;
+import ru.ulstu.method.MethodParameter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class NumberOfCoveredPoints extends MethodParameter {
+    private final static int MIN_NUMBER_OF_COVERED_POINTS = 3;
+    private final static int MIN_INCREASING_STEP_OF_NUMBER_OF_COVERED_POINTS = 2;
+
+    public NumberOfCoveredPoints() {
+        super("Number of covered points");
+    }
+
+    public static NumberOfCoveredPoints getInstance() {
+        return new NumberOfCoveredPoints();
+    }
+
+    @Override
+    public List<Number> getAvailableValues(TimeSeries timeSeries) {
+        List<Number> values = new ArrayList<>();
+        for (double i = MIN_NUMBER_OF_COVERED_POINTS; i <= (timeSeries.getLength() < 10 ? 7 : timeSeries.getLength() / 3.0); i += MIN_INCREASING_STEP_OF_NUMBER_OF_COVERED_POINTS) {
+            values.add(i);
+        }
+        return values;
+    }
+}

src/main/java/ru/ulstu/service/MethodParamBruteForce.java

@@ -48,7 +48,7 @@ class MethodParamBruteForce {
                 .collect(Collectors.toMap(TimeSeriesValue::getDate, TimeSeriesValue::getValue));
 
         for (Method method : methods) {
-            List<List<MethodParamValue>> availableParametersValues = getAvailableParametersValues(method.getAvailableParameters());
+            List<List<MethodParamValue>> availableParametersValues = getAvailableParametersValues(timeSeries, method.getAvailableParameters());
             for (List<MethodParamValue> parametersValues : availableParametersValues) {
                 Method methodInstance = method.getClass().getDeclaredConstructor().newInstance();
                 if (methodInstance.canMakeForecast(reducedTimeSeries, parametersValues, countPoints)) {
@@ -119,7 +119,7 @@ class MethodParamBruteForce {
     }
     */
 
-    public ModelingResult getSmoothedTimeSeries(TimeSeries timeSeries) throws ExecutionException, InterruptedException, NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
+    public ModelingResult getSmoothedTimeSeries(TimeSeries timeSeries, List<Method> methods) throws ExecutionException, InterruptedException, NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
         List<Future<ModelingResult>> results = new ArrayList<>();
         List<ModelingResult> results2 = new CopyOnWriteArrayList<>();
 
@@ -127,7 +127,7 @@ class MethodParamBruteForce {
                 .collect(Collectors.toMap(TimeSeriesValue::getDate, TimeSeriesValue::getValue));
 
         for (Method method : methods) {
-            List<List<MethodParamValue>> availableParametersValues = getAvailableParametersValues(method.getAvailableParameters());
+            List<List<MethodParamValue>> availableParametersValues = getAvailableParametersValues(timeSeries, method.getAvailableParameters());
             for (List<MethodParamValue> parametersValues : availableParametersValues) {
                 Method methodInstance = method.getClass().getDeclaredConstructor().newInstance();
                 if (methodInstance.canMakeModel(timeSeries, parametersValues)) {
@@ -150,13 +150,25 @@ class MethodParamBruteForce {
                 .orElse(null);
     }
 
-    private List<List<MethodParamValue>> getAvailableParametersValues(List<MethodParameter> availableParameters) {
+    public ModelingResult getSmoothedTimeSeries(TimeSeries timeSeries, String methodClassName) throws ExecutionException, InterruptedException, NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException, ModelingException {
+        Method method = methods.stream()
+                .filter(m -> m.getClass().getSimpleName().equals(methodClassName))
+                .findAny()
+                .orElseThrow(() -> new ModelingException("Неизвестный метод прогнозирования"));
+        return getSmoothedTimeSeries(timeSeries, List.of(method));
+    }
+
+    public ModelingResult getSmoothedTimeSeries(TimeSeries timeSeries) throws ExecutionException, InterruptedException, NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
+        return getSmoothedTimeSeries(timeSeries, methods);
+    }
+
+    private List<List<MethodParamValue>> getAvailableParametersValues(TimeSeries timeSeries, List<MethodParameter> availableParameters) {
         List<List<MethodParamValue>> result = new ArrayList<>();
         Map<MethodParameter, Integer> parameterOffset = new TreeMap<>();
         Map<MethodParameter, List<Number>> parameterValues = new TreeMap<>();
         for (MethodParameter methodParameter : availableParameters) {
             parameterOffset.put(methodParameter, 0);
-            parameterValues.put(methodParameter, methodParameter.getAvailableValues());
+            parameterValues.put(methodParameter, methodParameter.getAvailableValues(timeSeries));
         }
         while (isNotAllParameterValuesUsed(parameterOffset, parameterValues)) {
             List<MethodParamValue> resultRow = new ArrayList<>();

src/main/java/ru/ulstu/service/TimeSeriesService.java

@@ -35,6 +35,10 @@ public class TimeSeriesService {
         return methodParamBruteForce.getSmoothedTimeSeries(timeSeries);
     }
 
+    public ModelingResult smoothTimeSeries(TimeSeries timeSeries, String methodClassName) throws ExecutionException, InterruptedException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException, ModelingException {
+        return methodParamBruteForce.getSmoothedTimeSeries(timeSeries, methodClassName);
+    }
+
     public List<Method> getAvailableMethods() {
         return methodParamBruteForce.getAvailableMethods();
     }