core/java/com/android/internal/compat/IPlatformCompat.aidl

/*
 * Copyright (C) 2019 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 com.android.internal.compat;

import android.content.pm.ApplicationInfo;

/**
 * Platform private API for talking with the PlatformCompat service.
 *
 * <p> Should be used for gating and logging from non-app processes.
 * For app processes please use android.compat.Compatibility API.
 *
 * {@hide}
 */
interface IPlatformCompat
{

    /**
     * Reports that a compatibility change is affecting an app process now.
     *
     * <p>Note: for changes that are gated using {@link #isChangeEnabled(long, ApplicationInfo)},
     * you do not need to call this API directly. The change will be reported for you in the case
     * that {@link #isChangeEnabled(long, ApplicationInfo)} returns {@code true}.
     *
     * @param changeId The ID of the compatibility change taking effect.
     * @param appInfo Representing the affected app.
     */
    void reportChange(long changeId, in ApplicationInfo appInfo);

    /**
     * Query if a given compatibility change is enabled for an app process. This method should
     * be called when implementing functionality on behalf of the affected app.
     *
     * <p>If this method returns {@code true}, the calling code should implement the compatibility
     * change, resulting in differing behaviour compared to earlier releases. If this method returns
     * {@code false}, the calling code should behave as it did in earlier releases.
     *
     * <p>When this method returns {@code true}, it will also report the change as
     * {@link #reportChange(long, ApplicationInfo)} would, so there is no need to call that method
     * directly.
     *
     * @param changeId The ID of the compatibility change in question.
     * @param appInfo Representing the app in question.
     * @return {@code true} if the change is enabled for the current app.
     */
    boolean isChangeEnabled(long changeId, in ApplicationInfo appInfo);
}