Add UwbAddress to represent a UWB device

/*

 * Copyright 2020 The Android Open Source Project

 *

 * 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 android.uwb;

import android.annotation.NonNull;

import android.annotation.Nullable;

/**

 * A class representing a UWB address

 *

 * @hide

 */

public final class UwbAddress {

    public static final int SHORT_ADDRESS_BYTE_LENGTH = 2;

    public static final int EXTENDED_ADDRESS_BYTE_LENGTH = 8;

    /**

     * Create a {@link UwbAddress} from a byte array.

     *

     * <p>If the provided array is {@link #SHORT_ADDRESS_BYTE_LENGTH} bytes, a short address is

     * created. If the provided array is {@link #EXTENDED_ADDRESS_BYTE_LENGTH} bytes, then an

     * extended address is created.

     *

     * @param address a byte array to convert to a {@link UwbAddress}

     * @return a {@link UwbAddress} created from the input byte array

     * @throw IllegableArumentException when the length is not one of

     *       {@link #SHORT_ADDRESS_BYTE_LENGTH} or {@link #EXTENDED_ADDRESS_BYTE_LENGTH} bytes

     */

    @NonNull

    public static UwbAddress fromBytes(byte[] address) throws IllegalArgumentException {

        throw new UnsupportedOperationException();

    }

    /**

     * Get the address as a byte array

     *

     * @return the byte representation of this {@link UwbAddress}

     */

    @NonNull

    public byte[] toBytes() {

        throw new UnsupportedOperationException();

    }

    /**

     * The length of the address in bytes

     * <p>Possible values are {@link #SHORT_ADDRESS_BYTE_LENGTH} and

     * {@link #EXTENDED_ADDRESS_BYTE_LENGTH}.

     */

    public int size() {

        throw new UnsupportedOperationException();

    }

    @NonNull

    @Override

    public String toString() {

        throw new UnsupportedOperationException();

    }

    @Override

    public boolean equals(@Nullable Object obj) {

        throw new UnsupportedOperationException();

    }

    @Override

    public int hashCode() {

        throw new UnsupportedOperationException();

    }

}