Make tensor addresses integer based instead of as strings.

Positive numbers are direct indexes, while strings that does not represent numbers are enumerated
and represented with negative integers.

1 files changed, 49 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/tensor/impl/TensorAddressAny2.java b/vespajlib/src/main/java/com/yahoo/tensor/impl/TensorAddressAny2.java
new file mode 100644
index 00000000000..d77a689852f
--- /dev/null
+++ b/vespajlib/src/main/java/com/yahoo/tensor/impl/TensorAddressAny2.java
@@ -0,0 +1,49 @@
+// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+package com.yahoo.tensor.impl;
+
+import com.yahoo.tensor.TensorAddress;
+
+import static java.lang.Math.abs;
+
+/**
+ * 2 dimensional address
+ * @author baldersheim
+ */
+final class TensorAddressAny2 extends TensorAddressAny {
+    private final int label0, label1;
+    TensorAddressAny2(int label0, int label1) {
+        this.label0 = label0;
+        this.label1 = label1;
+    }
+
+    @Override public int size() { return 2; }
+
+    @Override
+    public long numericLabel(int i) {
+        return switch (i) {
+            case 0 -> label0;
+            case 1 -> label1;
+            default -> throw new IndexOutOfBoundsException("Index is not in [0,1]: " + i);
+        };
+    }
+
+    @Override
+    public TensorAddress withLabel(int labelIndex, long label) {
+        return switch (labelIndex) {
+            case 0 -> new TensorAddressAny2(Convert.safe2Int(label), label1);
+            case 1 -> new TensorAddressAny2(label0, Convert.safe2Int(label));
+            default -> throw new IllegalArgumentException("No label " + labelIndex);
+        };
+    }
+
+    @Override
+    public int hashCode() {
+        return abs(label0) | (abs(label1) << 32 - Integer.numberOfLeadingZeros(abs(label0)));
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        return (o instanceof TensorAddressAny2 any) && (label0 == any.label0) && (label1 == any.label1);
+    }
+}