/*
 * Copyright 2017 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.work.impl.constraints;

import androidx.annotation.MainThread;
import androidx.annotation.Nullable;

/**
 * The listener for constraint changes.
 *
 * @param <T> the constraint data type for this listener
 */

public interface ConstraintListener<T> {

    /**
     * Called when the value of a constraint has changed.
     * @param newValue the new value of the constraint
     */
    @MainThread
    void onConstraintChanged(@Nullable T newValue);
}