1 files changed, 17 insertions, 5 deletions
diff --git a/vespajlib/src/main/java/com/yahoo/tensor/impl/Label.java b/vespajlib/src/main/java/com/yahoo/tensor/impl/Label.java
index 0ab1454eb58..a09c0223d28 100644
--- a/vespajlib/src/main/java/com/yahoo/tensor/impl/Label.java
+++ b/vespajlib/src/main/java/com/yahoo/tensor/impl/Label.java
@@ -7,16 +7,26 @@ import java.util.Arrays;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 
+/**
+ * A label is a value of a mapped dimension of a tensor.
+ * This class provides a mapping of labels to numbers which allow for more efficient computation with
+ * mapped tensor dimensions.
+ *
+ * @author baldersheim
+ */
 public class Label {
-    private static final String [] SMALL_INDEXES = createSmallIndexesAsStrings(1000);
+
+    private static final String[] SMALL_INDEXES = createSmallIndexesAsStrings(1000);
+
     private final static Map<String, Integer> string2Enum = new ConcurrentHashMap<>();
+
     // Index 0 is unused, that is a valid positive number
     // 1(-1) is reserved for the Tensor.INVALID_INDEX
-    private static volatile String [] uniqueStrings = {"UNIQUE_UNUSED_MAGIC", "Tensor.INVALID_INDEX"};
+    private static volatile String[] uniqueStrings = {"UNIQUE_UNUSED_MAGIC", "Tensor.INVALID_INDEX"};
     private static int numUniqeStrings = 2;
 
     private static String[] createSmallIndexesAsStrings(int count) {
-        String [] asStrings = new String[count];
+        String[] asStrings = new String[count];
         for (int i = 0; i < count; i++) {
             asStrings[i] = String.valueOf(i);
         }
@@ -46,7 +56,7 @@ public class Label {
     }
 
     public static int toNumber(String s) {
-        if (s == null) { return Tensor.INVALID_INDEX; }
+        if (s == null) { return Tensor.invalidIndex; }
         try {
             if (validNumericIndex(s)) {
                 return Integer.parseInt(s);
@@ -55,14 +65,16 @@ public class Label {
         }
         return string2Enum.computeIfAbsent(s, Label::addNewUniqueString);
     }
+
     public static String fromNumber(int v) {
         if (v >= 0) {
             return asNumericString(v);
         } else {
-            if (v == Tensor.INVALID_INDEX) { return null; }
+            if (v == Tensor.invalidIndex) { return null; }
             return uniqueStrings[-v];
         }
     }
+
     public static String fromNumber(long v) {
         return fromNumber(Convert.safe2Int(v));
     }