prepared time-locator implementation

Author: TomBlock

core/src/main/java/com/bc/fiduceo/reader/smos/SmosL1CDailyGriddedReader.java

@@ -26,6 +26,7 @@
 import java.nio.file.Files;
 import java.util.ArrayList;
 import java.util.Calendar;
+import java.util.Date;
 import java.util.List;
 
 class SmosL1CDailyGriddedReader extends NetCDFReader {
@@ -300,4 +301,23 @@ static MultiLineString createMultiLineStringFromMinMax(double[] geoMinMax, Geome
 
         return geometryFactory.createMultiLineString(lines);
     }
+
+    // package access for testing only tb 2022-09-29
+    static Date cfiDateToUtc(int days, long seconds, long microseconds) {
+        final Calendar calendar = TimeUtils.getUTCCalendar();
+
+        calendar.set(Calendar.YEAR, 2000);
+        calendar.set(Calendar.MONTH, 0);
+        calendar.set(Calendar.DAY_OF_MONTH, 1);
+        calendar.set(Calendar.HOUR_OF_DAY, 0);
+        calendar.set(Calendar.MINUTE, 0);
+        calendar.set(Calendar.SECOND, 0);
+        calendar.set(Calendar.MILLISECOND, 0);
+
+        calendar.add(Calendar.DATE, days);
+        calendar.add(Calendar.SECOND, (int) seconds);
+        calendar.add(Calendar.MILLISECOND, (int) (microseconds * 0.001));
+
+        return calendar.getTime();
+    }
 }

core/src/main/java/com/bc/fiduceo/reader/smos/SmosL1CTimeLocator.java

@@ -0,0 +1,11 @@
+package com.bc.fiduceo.reader.smos;
+
+import com.bc.fiduceo.reader.time.TimeLocator;
+
+class SmosL1CTimeLocator implements TimeLocator {
+
+    @Override
+    public long getTimeFor(int x, int y) {
+        return 0;
+    }
+}

core/src/test/java/com/bc/fiduceo/reader/smos/SmosL1cDailyGriddedReaderTest.java

@@ -5,14 +5,17 @@
 import com.bc.fiduceo.geometry.Point;
 import com.bc.fiduceo.geometry.Polygon;
 import com.bc.fiduceo.reader.Reader;
+import com.bc.fiduceo.util.TimeUtils;
 import org.junit.Test;
 import ucar.ma2.Array;
 
+import java.util.Date;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 import static org.junit.Assert.*;
 
+@SuppressWarnings("resource")
 public class SmosL1cDailyGriddedReaderTest {
 
     @Test
@@ -116,4 +119,21 @@ public void testCreateMultiLineStringFromMinMax() {
         assertEquals("POINT(0.0 87.0)", coordinates[2].toString());
         assertEquals("POINT(0.0 -78.0)", coordinates[3].toString());
     }
+
+    @Test
+    public void testCfiDateToUtc() {
+        Date date = SmosL1CDailyGriddedReader.cfiDateToUtc(0, 0, 0);
+        assertEquals("01-Jan-2000 00:00:00", TimeUtils.format(date));
+
+        date = SmosL1CDailyGriddedReader.cfiDateToUtc(1, 0, 0);
+        assertEquals("02-Jan-2000 00:00:00", TimeUtils.format(date));
+
+        date = SmosL1CDailyGriddedReader.cfiDateToUtc(1, 10, 0);
+        long timeWithoutMillis = date.getTime();
+        assertEquals("02-Jan-2000 00:00:10", TimeUtils.format(date));
+
+        date = SmosL1CDailyGriddedReader.cfiDateToUtc(1, 10, 100000);    // last argument is microsecond, date can only handle millis ...
+        assertEquals("02-Jan-2000 00:00:10", TimeUtils.format(date));
+        assertEquals(timeWithoutMillis + 100, date.getTime());
+    }
 }