/*
 * 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 androidx.wear.watchface;

import androidx.annotation.NonNull;

/**
 * A simple callback that can receive from ObservableWatchData.  NB defined in java to allow SAM
 * conversion of kotlin lambdas.
 *
 * @param <T> The type of the parameter
 */
@SuppressWarnings("CallbackName")
public interface Observer<T> {
    /**
     * Called when the data is changed.
     * @param t The new data
     */
    void onChanged(@NonNull T t);
}