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// 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;
/**
* 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;
}
}
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