/*

Copyright 2019 The TensorFlow Authors. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

=======================================================================

*/

package org.tensorflow.ndarray.index;

import org.tensorflow.ndarray.impl.dimension.Dimension;

final class At implements Index {

@Override

public long numElements(Dimension dim) {

return 1;

}

@Override

public long mapCoordinate(long coordinate, Dimension dim) {

return dim.positionOf(coord); // TODO validate coordinate is 0?

}

@Override

public Dimension apply(Dimension dim) {

throw new IllegalStateException(); // FIXME?

}

@Override

public boolean isPoint() {

return true;

}

At(long coord) {

this.coord = coord;

}

private final long coord;

}