Cherry pick branch 'genexuslabs:HandleNullEmbeddings' into beta

Author: iroqueta

java/src/main/java/com/genexus/db/GXEmbedding.java

@@ -33,7 +33,10 @@ public GXEmbedding(String model, int dimensions) {
 	public GXEmbedding(Float[] embedding, String model, int dimensions) {
 		this.model = model;
 		this.dimensions = dimensions;
-		this.embedding = Arrays.asList(embedding);
+		if (embedding == null)
+			this.embedding = new ArrayList<>(Collections.nCopies(dimensions, 0.0f));
+		else
+			this.embedding = Arrays.asList(embedding);
 	}
 
 	public GXEmbedding(List<Float> embedding) {

java/src/main/java/com/genexus/db/driver/GXResultSet.java

@@ -837,10 +837,20 @@ public Float[] getGxembedding (int columnIndex) throws SQLException
 		if	(DEBUG )
 			log(GXDBDebug.LOG_MAX, "Warning: getEmbedding");
 
-		if (con.getDBMS().getId() == GXDBMS.DBMS_POSTGRESQL)
-			return convertVectorStringToFloatArray(result.getArray(columnIndex).toString());
-		else
-			return byteArrayToFloatObjectArray(result.getBytes(columnIndex));
+		if (con.getDBMS().getId() == GXDBMS.DBMS_POSTGRESQL) {
+			Object array = result.getArray(columnIndex);
+			if (array == null)
+				return null;
+			else
+				return convertVectorStringToFloatArray(array.toString());
+		}
+		else {
+			byte[] bytes = result.getBytes(columnIndex);
+			if (bytes == null)
+				return null;
+			else
+				return byteArrayToFloatObjectArray(bytes);
+		}
 	}
 
 	private static Float[] byteArrayToFloatObjectArray(byte[] bytes) {