show time series statistic

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

@@ -12,6 +12,7 @@ import ru.ulstu.datamodel.ts.TimeSeries;
 import ru.ulstu.datamodel.ts.TimeSeriesValue;
 import ru.ulstu.db.DbService;
 import ru.ulstu.service.TimeSeriesService;
+import ru.ulstu.statistic.StatisticService;
 
 import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
@@ -27,11 +28,14 @@ import java.util.stream.Stream;
 public class IndexController {
     private final TimeSeriesService timeSeriesService;
     private final DbService dbService;
+    private final StatisticService statisticService;
 
     public IndexController(TimeSeriesService timeSeriesService,
-                           DbService dbService) {
+                           DbService dbService,
+                           StatisticService statisticService) {
         this.timeSeriesService = timeSeriesService;
         this.dbService = dbService;
+        this.statisticService = statisticService;
     }
 
     @GetMapping("/")
@@ -96,6 +100,7 @@ public class IndexController {
         testForecastValues.addAll(testForecast.getValues().stream().map(TimeSeriesValue::getValue).collect(Collectors.toList()));
         model.addAttribute("testForecast", testForecastValues.toArray());
         model.addAttribute("forecastDescription", modelingResult);
+        model.addAttribute("statistic", statisticService.getStatistic(timeSeries));
     }
 
     private List<String> getDatesForChart(TimeSeries timeSeries, TimeSeries forecast) {

src/main/java/ru/ulstu/statistic/StatisticService.java

@@ -40,4 +40,11 @@ public class StatisticService {
     private Optional<Double> getOptionalValue(Double value) {
         return Optional.ofNullable(value);
     }
+
+    public TimeSeriesStatistic getStatistic(TimeSeries timeSeries) {
+        return new TimeSeriesStatistic(getMin(timeSeries),
+                getMax(timeSeries),
+                getAverage(timeSeries),
+                getLength(timeSeries));
+    }
 }

src/main/java/ru/ulstu/statistic/TimeSeriesStatistic.java

@@ -0,0 +1,36 @@
+package ru.ulstu.statistic;
+
+import java.util.Optional;
+
+public class TimeSeriesStatistic {
+    private Optional<Double> min;
+    private Optional<Double> max;
+    private Optional<Double> average;
+    private Optional<Double> length;
+
+    public TimeSeriesStatistic(Optional<Double> min,
+                               Optional<Double> max,
+                               Optional<Double> average,
+                               Optional<Double> length) {
+        this.min = min;
+        this.max = max;
+        this.average = average;
+        this.length = length;
+    }
+
+    public Optional<Double> getMin() {
+        return min;
+    }
+
+    public Optional<Double> getMax() {
+        return max;
+    }
+
+    public Optional<Double> getAverage() {
+        return average;
+    }
+
+    public Optional<Double> getLength() {
+        return length;
+    }
+}

src/main/resources/templates/index.html

@@ -145,13 +145,20 @@
                     Статистические характеристики временного ряда:
                 </h5>
                 <div th:if="${forecastDescription != null && forecastDescription.timeSeriesMethod != null}">
-                    <p> Метод прогнозирования:
-                        <span th:text="${forecastDescription.timeSeriesMethod}"/>
+                    <p> Длина:
+                        <span th:text="${statistic.length.present ? statistic.length.get : 'Не известно'}"/>
                     </p>
                     <hr/>
-                    <p> Оценка прогноза по
-                        <span th:text="${forecastDescription.score.scoreMethod.name}"/>:
-                        <span th:text="${forecastDescription.score.value}"/>
+                    <p> Минимальное значение:
+                        <span th:text="${statistic.min.present ? statistic.min.get : 'Не известно'}"/>
+                    </p>
+                    <hr/>
+                    <p> Максимальное значение:
+                        <span th:text="${statistic.max.present ? statistic.max.get : 'Не известно'}"/>
+                    </p>
+                    <hr/>
+                    <p> Среднее значение:
+                        <span th:text="${statistic.average.present ? statistic.average.get : 'Не известно'}"/>
                     </p>
                     <hr/>
                 </div>