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

@@ -54,12 +54,16 @@ public class IndexController {
         if (chartForm.getTimeSeriesMeta() != null
                 && chartForm.getTimeSeriesMeta().getKey() != null
                 && !chartForm.getTimeSeriesMeta().getKey().isEmpty()) {
-            addChartToModel(dbService.getTimeSeries(chartForm.getSet(), chartForm.getTimeSeriesMeta().getKey()), null, model);
+            addChartToModel(dbService.getTimeSeries(chartForm.getSet(), chartForm.getTimeSeriesMeta().getKey()),
+                    null,
+                    chartForm.isNeedForecast(),
+                    model);
         }
         return "index";
     }
 
-    private void addChartToModel(TimeSeries timeSeries, String method, Model model) throws ExecutionException, InterruptedException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException, ModelingException {
+    private void addChartToModel(TimeSeries timeSeries, String method, boolean needForecast, Model model) throws ExecutionException, InterruptedException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException, ModelingException {
+        if (needForecast) {
             int countForecastPoints = timeSeries.getLength() > 20 ? 10 : timeSeries.getLength() / 3;
             TimeSeries timeSeriesModel;
             ModelingResult modelingResult;
@@ -72,8 +76,6 @@ public class IndexController {
             }
             TimeSeries forecast = modelingResult.getTimeSeries();
             TimeSeries testForecast = modelingResult.getTestForecast();
-        model.addAttribute("dates", getDatesForChart(timeSeries, forecast));
-        model.addAttribute("timeSeries", timeSeries.getValues().stream().map(TimeSeriesValue::getValue).toArray());
             // если временной ряд был сжат моделью, то для графика нужно вставить пустые значения
             TimeSeries modelWithSkips = new TimeSeries(timeSeriesModel.getKey());
             int j = 0;
@@ -101,6 +103,11 @@ public class IndexController {
             model.addAttribute("testForecast", testForecastValues.toArray());
             model.addAttribute("forecastDescription", modelingResult);
             model.addAttribute("statistic", statisticService.getStatistic(timeSeries));
+            model.addAttribute("dates", getDatesForChart(timeSeries, forecast));
+        } else {
+            model.addAttribute("dates", getDatesForChart(timeSeries, new TimeSeries()));
+        }
+        model.addAttribute("timeSeries", timeSeries.getValues().stream().map(TimeSeriesValue::getValue).toArray());
     }
 
     private List<String> getDatesForChart(TimeSeries timeSeries, TimeSeries forecast) {
@@ -132,7 +139,10 @@ public class IndexController {
                 && !chartForm.getTimeSeriesMeta().getKey().isEmpty()
                 && chartForm.getMethodClassName() != null
                 && !chartForm.getMethodClassName().equals("")) {
-            addChartToModel(dbService.getTimeSeries(chartForm.getSet(), chartForm.getTimeSeriesMeta().getKey()), chartForm.getMethodClassName(), model);
+            addChartToModel(dbService.getTimeSeries(chartForm.getSet(), chartForm.getTimeSeriesMeta().getKey()),
+                    chartForm.getMethodClassName(),
+                    chartForm.isNeedForecast(),
+                    model);
         }
         return "method";
     }

src/main/java/ru/ulstu/datamodel/ChartForm.java

@@ -8,6 +8,8 @@ public class ChartForm {
     private TimeSeriesMeta timeSeriesMeta;
     private String methodClassName = null;
 
+    private boolean needForecast;
+
     public TimeSeriesSet getSet() {
         return set;
     }
@@ -31,4 +33,12 @@ public class ChartForm {
     public void setMethodClassName(String methodClassName) {
         this.methodClassName = methodClassName;
     }
+
+    public boolean isNeedForecast() {
+        return needForecast;
+    }
+
+    public void setNeedForecast(boolean needForecast) {
+        this.needForecast = needForecast;
+    }
 }

src/main/resources/templates/index.html

@@ -123,7 +123,10 @@
                     $('#select-ts').val([[*{timeSeriesMeta.key}]]);
                     $('#select-ts').selectpicker('refresh');
                 </script>
-
+                <input id="need-forecast" type="hidden" th:field="*{needForecast}">
+                <button type="button" class="btn btn-primary" onclick="$('#need-forecast').val(true); form.submit();">
+                    Построить прогноз
+                </button>
                 <h5 th:if="${forecastDescription != null && forecastDescription.timeSeriesMethod != null}">
                     Результаты моделирования:
                 </h5>

src/main/resources/templates/method.html

@@ -120,7 +120,7 @@
 
                 <select id="select-ts" class="selectpicker form-group" data-live-search="true"
                         th:field="*{timeSeriesMeta}"
-                        data-width="90%" onchange="form.submit();">
+                        data-width="90%" onchange="$('#need-forecast').val(false); form.submit();">
                     <option value="">Временной ряд</option>
                     <option th:each="ts : ${listTimeSeries}"
                             th:value="${ts.key}"
@@ -135,7 +135,7 @@
 
                 <select id="select-method" class="selectpicker form-group" data-live-search="true"
                         th:field="*{methodClassName}"
-                        data-width="90%" onchange="form.submit();">
+                        data-width="90%" onchange="$('#need-forecast').val(false); form.submit();">
                     <option value="">Метод прогнозирования</option>
                     <option th:each="method : ${methods}"
                             th:value="${method.key}"
@@ -148,7 +148,10 @@
 
 
                 </script>
-
+                <input id="need-forecast" type="hidden" th:field="*{needForecast}">
+                <button type="button" class="btn btn-primary" onclick="$('#need-forecast').val(true); form.submit();">
+                    Построить прогноз
+                </button>
                 <div th:if="${forecastDescription != null && forecastDescription.timeSeriesMethod != null}">
                     <p> Метод прогнозирования: <span th:text="${forecastDescription.timeSeriesMethod}"> </span>
                     <p> Оценка: <span th:text="${forecastDescription.score.value}"> </span>