Enable joinNew agg with numericTimeSettings

cdm/core/src/main/java/ucar/nc2/internal/ncml/AggregationNew.java

@@ -14,6 +14,7 @@
 import ucar.nc2.Group;
 import ucar.nc2.NetcdfFile;
 import ucar.nc2.Variable;
+import ucar.nc2.constants.CF;
 import ucar.nc2.constants._Coordinate;
 import ucar.nc2.dataset.CoordinateAxis;
 import ucar.nc2.dataset.NetcdfDataset;
@@ -60,8 +61,13 @@ protected void buildNetcdfDataset(CancelTask cancelTask) throws IOException {
           .setParentGroupBuilder(root).setDimensionsByName(dimName);
       root.addVariable(joinAggCoordVar);
       joinAggCoordVar.setProxyReader(this);
-      if (isDate)
+      if (isDate) {
         joinAggCoordVar.addAttribute(new Attribute(_Coordinate.AxisType, "Time"));
+        String coordUnits = ((AggDatasetOuter) typicalDataset).coordUdunit;
+        if (coordUnits != null && !coordUnits.isEmpty()) {
+          joinAggCoordVar.addAttribute(new Attribute(CF.UNITS, coordUnits));
+        }
+      }
 
       // if speced externally, this variable will get replaced
       // LOOK was CacheVar cv = new CoordValueVar(joinAggCoordVar.getFullName(), joinAggCoordVar.dataType,

cdm/core/src/main/java/ucar/nc2/ncml/AggregationNew.java

@@ -5,6 +5,7 @@
 
 package ucar.nc2.ncml;
 
+import ucar.nc2.constants.CF;
 import ucar.nc2.dataset.NetcdfDataset;
 import ucar.nc2.dataset.VariableDS;
 import ucar.nc2.dataset.DatasetConstructor;
@@ -55,8 +56,14 @@ protected void buildNetcdfDataset(CancelTask cancelTask) throws IOException {
       joinAggCoord = new VariableDS(ncDataset, null, null, dimName, coordType, dimName, null, null);
       ncDataset.addVariable(null, joinAggCoord);
       joinAggCoord.setProxyReader(this);
-      if (isDate)
+      if (isDate) {
         joinAggCoord.addAttribute(new ucar.nc2.Attribute(_Coordinate.AxisType, "Time"));
+        String coordUnits = ((DatasetOuterDimension) typicalDataset).coordUdunit;
+        if (coordUnits != null && !coordUnits.isEmpty()) {
+          joinAggCoord.addAttribute(new Attribute(CF.UNITS, coordUnits));
+        }
+      }
+
 
       // if speced externally, this variable will get replaced
       CacheVar cv =

cdm/core/src/test/data/ncml/aggNewOne.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2">
+  <aggregation dimName="time2" type="joinNew" recheckEvery="4 sec">
+    <scan dateFormatMark="CG#yyyyDDD_HHmmss"
+      location="nc/cg/"
+      suffix=".nc"
+      subdirs="false"/>
+  </aggregation>
+</netcdf>

cdm/core/src/test/data/ncml/aggNewOneNumericTime.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2">
+  <aggregation dimName="time2" type="joinNew" recheckEvery="4 sec">
+    <scan dateFormatMark="CG#yyyyDDD_HHmmss"
+      location="nc/cg/"
+      suffix=".nc"
+      subdirs="false"
+      numericTimeSettings="int seconds since 2006-06-07T11:00:00Z"/>
+  </aggregation>
+</netcdf>

cdm/core/src/test/java/ucar/nc2/ncml/TestAggScanNumericTime.java

@@ -15,6 +15,7 @@
 import ucar.nc2.Variable;
 import ucar.nc2.dataset.NetcdfDataset;
 import ucar.nc2.dataset.NetcdfDatasets;
+import ucar.nc2.internal.ncml.NcmlReader;
 import ucar.nc2.time.Calendar;
 import ucar.nc2.time.CalendarDate;
 import ucar.nc2.time.CalendarDateFormatter;
@@ -30,7 +31,7 @@ public void testNumericTime() throws IOException, InvalidRangeException, Interru
 
     try (NetcdfDataset ncStr = NetcdfDataset.openDataset(aggStringTime);
         NetcdfDataset ncNum = NetcdfDataset.openDataset(aggNumericTime)) {
-      compareTimes(ncStr, ncNum);
+      compareTimes(ncStr, ncNum, "time");
     }
   }
 
@@ -41,14 +42,34 @@ public void testNumericTimeWithBuilders() throws IOException, InvalidRangeExcept
 
     try (NetcdfDataset ncStr = NetcdfDatasets.openDataset(aggStringTime);
         NetcdfDataset ncNum = NetcdfDatasets.openDataset(aggNumericTime)) {
-      compareTimes(ncStr, ncNum);
+      compareTimes(ncStr, ncNum, "time");
     }
   }
 
-  void compareTimes(NetcdfDataset ncStr, NetcdfDataset ncNum) throws IOException {
-    Variable isoTimeVar = ncStr.findVariable("time");
+  @Test
+  public void testNumericTimeNcmlReader() throws IOException, InvalidRangeException, InterruptedException {
+    String aggStringTime = "file:./" + TestNcmlRead.topDir + "aggNewOne.xml";
+    String aggNumericTime = "file:./" + TestNcmlRead.topDir + "aggNewOneNumericTime.xml";
+    try (NetcdfDataset ncStr = NcMLReader.readNcML(aggStringTime, null);
+        NetcdfDataset ncNum = NcMLReader.readNcML(aggNumericTime, null)) {
+      compareTimes(ncStr, ncNum, "time2");
+    }
+  }
+
+  @Test
+  public void testNumericTimeNcmlReaderWithBuilders() throws IOException, InvalidRangeException, InterruptedException {
+    String aggStringTime = "file:./" + TestNcmlRead.topDir + "aggNewOne.xml";
+    String aggNumericTime = "file:./" + TestNcmlRead.topDir + "aggNewOneNumericTime.xml";
+    try (NetcdfDataset ncStr = NcmlReader.readNcml(aggStringTime, null, null).build();
+        NetcdfDataset ncNum = NcmlReader.readNcml(aggNumericTime, null, null).build()) {
+      compareTimes(ncStr, ncNum, "time2");
+    }
+  }
+
+  void compareTimes(NetcdfDataset ncStr, NetcdfDataset ncNum, String timeVarName) throws IOException {
+    Variable isoTimeVar = ncStr.findVariable(timeVarName);
     assertThat(isoTimeVar != null).isTrue();
-    Variable numericTimeVar = ncNum.findVariable("time");
+    Variable numericTimeVar = ncNum.findVariable(timeVarName);
     assertThat(numericTimeVar != null).isTrue();
     Array isoTime = isoTimeVar.read();
     Array numericTime = numericTimeVar.read();