Merge pull request #1497 from lesserwhirls/gh-1496

Extend DatasetUrl to identify the gcdm protocol

Author: lesserwhirls

cdm/core/src/main/java/thredds/client/catalog/ServiceType.java

@@ -1,7 +1,8 @@
 /*
- * Copyright (c) 1998-2018 University Corporation for Atmospheric Research/Unidata
+ * Copyright (c) 1998-2025 University Corporation for Atmospheric Research/Unidata
  * See LICENSE for license information.
  */
+
 package thredds.client.catalog;
 
 /**
@@ -42,7 +43,7 @@ public enum ServiceType {
       AccessType.DataAccess, null), //
   WMS("Supports access to georegistered map images from geoscience datasets.", AccessType.DataAccess, null), //
   WSDL, //
-  ;
+  GCDM("gRPC services for the Common Data Model", AccessType.DataAccess, "gcdm");
 
   private final String desc;
   private final String protocol;

cdm/core/src/main/java/ucar/nc2/dataset/DatasetUrl.java

@@ -232,6 +232,8 @@ private static ServiceType searchFragment(String fragment) {
         return ServiceType.THREDDS;
       if (protocol.equalsIgnoreCase("ncml"))
         return ServiceType.NCML;
+      if (protocol.equalsIgnoreCase("gcdm"))
+        return ServiceType.GCDM;
     }
     return null;
   }
@@ -338,6 +340,8 @@ private static ServiceType decodeLeadProtocol(String protocol) {
         return ServiceType.CdmRemote;
       case "thredds":
         return ServiceType.THREDDS;
+      case "gcdm":
+        return ServiceType.GCDM;
     }
 
     return null;

cdm/core/src/test/java/ucar/nc2/dataset/TestDatasetUrl.java

@@ -1,7 +1,8 @@
 /*
- * Copyright (c) 1998-2018 John Caron and University Corporation for Atmospheric Research/Unidata
+ * Copyright (c) 1998-2025 John Caron and University Corporation for Atmospheric Research/Unidata
  * See LICENSE for license information.
  */
+
 package ucar.nc2.dataset;
 
 import static com.google.common.truth.Truth.assertThat;
@@ -123,6 +124,10 @@ public void testFindDatasetUrl() throws IOException {
     testFind("cdms3:thredds-test-data?ncml/testStandalone.ncml#delimiter=/", ServiceType.NCML);
     testFind("cdms3:thredds-test-data?ncml/testStandalone.ncml", ServiceType.NCML);
     testFind("cdms3://[email protected]/bucket-name?super/long/key.ncml#delimiter=/", ServiceType.NCML);
+
+    testFind("gcdm://localhost:8080/some/path/dataset.nc", ServiceType.GCDM);
+    testFind("gcdm:http://localhost:8080/some/path/dataset.nc", ServiceType.GCDM);
+    testFind("gcdm:https://some.host.org/some/path/dataset.nc", ServiceType.GCDM);
   }
 
   @Test