fix extraction for WRITE only attributes

src/main/java/fr/soleil/archiving/datafetch/graphql/domain/values/DbDataMapper.java

@@ -18,14 +18,24 @@ public class DbDataMapper {
 
     public static AttributeValues mapAttributeValues(String attributeName, DbData[] data) {
         AttributeValues result = null;
-        if (data == null || data[0] == null) {
+
+        if (data == null) {
+            throw new RuntimeException("No data");
+        }
+        DbData toExtract;
+        if (data[0] != null) {
+            toExtract = data[0];
+        } else if (data[0] == null && data[1] != null) {
+            toExtract = data[1];
+        } else {
             throw new RuntimeException("No data");
         }
-        int writable = data[0].getWritable();
 
-        result = convertDbDataToAttributesValues(attributeName, data);
-        if (data[0].getDataType() == TangoConst.Tango_DEV_STATE) {
-            if (data[0].getDataFormat() == AttrDataFormat._SCALAR) {
+        int writable = toExtract.getWritable();
+
+        result = convertDbDataToAttributesValues(attributeName, data, writable);
+        if (toExtract.getDataType() == TangoConst.Tango_DEV_STATE) {
+            if (toExtract.getDataFormat() == AttrDataFormat._SCALAR) {
                 if (result.getRead() != null) {
                     result.setRead(Arrays.stream((Object[]) result.getRead())
                             .map(i -> i != null ? DevState.from_int((int) i).toString() : null)
@@ -35,7 +45,7 @@ public class DbDataMapper {
                     result.setWrite(Arrays.stream((Object[]) result.getWrite())
                             .map(i -> i != null ? DevState.from_int((int) i).toString() : null).toArray(String[]::new));
                 }
-            } else if (data[0].getDataFormat() == AttrDataFormat._SPECTRUM) {
+            } else if (toExtract.getDataFormat() == AttrDataFormat._SPECTRUM) {
                 if (result.getRead() != null) {
                     String[][] map = new String[((Object[]) result.getRead()).length][];
                     int index = 0;
@@ -66,19 +76,29 @@ public class DbDataMapper {
 
         TangoAttributeInfo info = new TangoAttributeInfo();
         info.setName(attributeName);
+        if(data[0]!=null) {
             info.setType(TangoConst.Tango_CmdArgTypeName[data[0].getDataType()]);
             info.setFormat(TangoAttributeFormat.build(data[0].getDataFormat()));
+        }else{
+            info.setType(TangoConst.Tango_CmdArgTypeName[data[1].getDataType()]);
+            info.setFormat(TangoAttributeFormat.build(data[1].getDataFormat()));
+        }
         info.setWriteType(TangoWriteType.build(writable));
         result.setInfo(info);
         return result;
     }
 
 
-    protected static AttributeValues convertDbDataToAttributesValues(String attributeName, DbData[] dbData) {
+    protected static AttributeValues convertDbDataToAttributesValues(String attributeName, DbData[] dbData, int writable ) {
         AttributeValues result = null;
         Object[] readValues = null, writeValues = null;
-        long[] timestamps = Arrays.stream(dbData[0].getTimedData()).mapToLong(data -> data.getTime()).toArray();
-        switch (dbData[0].getWritable()) {
+        long[] timestamps;
+        if (dbData[0] != null) {
+            timestamps = Arrays.stream(dbData[0].getTimedData()).mapToLong(data -> data.getTime()).toArray();
+        }else{
+            timestamps = Arrays.stream(dbData[1].getTimedData()).mapToLong(data -> data.getTime()).toArray();
+        }
+        switch (writable) {
             case AttrWriteType._READ:
                 if (dbData[0].getDataFormat() == AttrDataFormat._SCALAR) {
                     readValues = Arrays.stream(dbData[0].getTimedData()).map(data ->
@@ -90,10 +110,10 @@ public class DbDataMapper {
                 }
                 break;
             case AttrWriteType._WRITE:
-                if (dbData[0].getDataFormat() == AttrDataFormat._SCALAR) {
-                    writeValues = Arrays.stream(dbData[0].getTimedData()).map(data -> data.getValue() != null ? Array.get(data.getValue(), 0) : defaultValue(dbData[0])).toArray();
+                if (dbData[1].getDataFormat() == AttrDataFormat._SCALAR) {
+                    writeValues = Arrays.stream(dbData[1].getTimedData()).map(data -> data.getValue() != null ? Array.get(data.getValue(), 0) : defaultValue(dbData[0])).toArray();
                 } else {
-                    writeValues = Arrays.stream(dbData[0].getTimedData()).map(data -> data.getValue()).toArray();
+                    writeValues = Arrays.stream(dbData[1].getTimedData()).map(data -> data.getValue()).toArray();
                 }
                 break;
             case AttrWriteType._READ_WITH_WRITE: