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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.tensor;
import java.util.Arrays;
/**
* An indexed tensor implementation holding values as doubles
*
* @author bratseth
*/
class IndexedDoubleTensor extends IndexedTensor {
private final double[] values;
IndexedDoubleTensor(TensorType type, DimensionSizes dimensionSizes, double[] values) {
super(type, dimensionSizes);
this.values = values;
}
@Override
public long size() {
return values.length;
}
/**
* Returns the value at the given index by direct lookup. Only use
* if you know the underlying data layout.
*
* @param valueIndex the direct index into the underlying data.
* @throws IndexOutOfBoundsException if index is out of bounds
*/
@Override
public double get(long valueIndex) { return values[(int)valueIndex]; }
@Override
public IndexedTensor withType(TensorType type) {
if ( ! this.type().isRenamableTo(type))
throw new IllegalArgumentException("Can not change type from " + this.type() + " to " + type +
": Types are not compatible");
return new IndexedDoubleTensor(type, dimensionSizes(), values);
}
@Override
public int hashCode() { return Arrays.hashCode(values); }
}
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