ENH: Input dates are ASCII file with dates in the YYYYMMDD format

app/otbTimeSeriesIndexTrend.cxx

@@ -166,13 +166,13 @@ private:
     AddParameter(ParameterType_InputImageList,  "ndvits",   "Input NDVI time series images");
 
     // Input NDVI time series dates
-    AddParameter(ParameterType_StringList, "ndvidates", "Input NDVI time series dates (Must be dd/mm/yyyy format)");
+    AddParameter(ParameterType_InputFilename, "ndvidates", "Input NDVI time series dates ASCII file (Must be YYYYMMDD format)");
 
     // Input rainfall time series images
     AddParameter(ParameterType_InputImageList,  "rainfts",   "Input rainfall time series images");
 
     // Input rainfall time series dates
-    AddParameter(ParameterType_StringList, "rainfdates", "Input rainfall time series dates (Must be dd/mm/yyyy format)");
+    AddParameter(ParameterType_StringList, "rainfdates", "Input rainfall time series dates (Must be YYYYMMDD format)");
 
     // Parameter group for NDVI time series
     AddParameter(ParameterType_Group, "ndvi", "NDVI Time series");
@@ -256,14 +256,16 @@ private:
   }
 
   /*
-   * Retrieve the dates (numeric) from the input dates (string) dd/mm/yyyy
+   * Retrieve the dates (numeric) from the input dates (string)
+   * Input dates (string) must be formated using the following pattern: YYYYMMDD
    */
   std::vector<DateType> GetTimeSeriesDates(std::string key){
 
-    std::vector<std::string> list = this->GetParameterStringList(key);
-    std::vector<DateType> dates = otb::dates::GetDatesFromStringVector(list);
-
-    otbAppLogINFO("Using " << dates.size() << " input dates from " << list[0] << " to " << list[list.size()-1] );
+    std::vector<DateType> dates = otb::dates::GetDatesFromFile(key);
+    unsigned int n = dates.size() - 1;
+    otbAppLogINFO("Using " << dates.size() << " input dates from "
+        << dates[0].year << "/" << dates[0].month << "/" << dates[0].day << " to "
+        << dates[n].year << "/" << dates[n].month << "/" << dates[n].day );
 
     return dates;
   }