blob: d5bac62bf1878a825ad96077d3a5d64d6bb45d5e (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
// 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 java.util.Arrays;
import static java.lang.Math.abs;
/**
* An n-dimensional address.
*
* @author baldersheim
*/
final class TensorAddressAnyN extends TensorAddressAny {
private final int[] labels;
TensorAddressAnyN(int[] labels) {
if (labels.length < 1) throw new IllegalArgumentException("Need at least 1 label");
this.labels = labels;
}
@Override public int size() { return labels.length; }
@Override public long numericLabel(int i) { return labels[i]; }
@Override
public TensorAddress withLabel(int labelIndex, long label) {
int[] copy = Arrays.copyOf(labels, labels.length);
copy[labelIndex] = Convert.safe2Int(label);
return new TensorAddressAnyN(copy);
}
@Override public int hashCode() {
int hash = abs(labels[0]);
for (int i = 0; i < size(); i++) {
hash = hash | (abs(labels[i]) << (32 - Integer.numberOfLeadingZeros(hash)));
}
return hash;
}
@Override
public boolean equals(Object o) {
if (! (o instanceof TensorAddressAnyN any) || (size() != any.size())) return false;
for (int i = 0; i < size(); i++) {
if (labels[i] != any.labels[i]) return false;
}
return true;
}
}
|
