common/device-side/bedstead/remoteframeworkclasses/src/processor/res/parcelablewrappers/NullParcelableAccountManagerCallback.java.txt

/*
 * Copyright (C) 2021 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.bedstead.remoteframeworkclasses;

import android.accounts.AccountManagerCallback;
import android.os.Parcel;
import android.os.Parcelable;

import com.google.android.enterprise.connectedapps.annotations.CustomParcelableWrapper;
import com.google.android.enterprise.connectedapps.internal.Bundler;
import com.google.android.enterprise.connectedapps.internal.BundlerType;

/**
 * This parcelable wrapper just passes null to callers.
 *
 * <p>It is not functional and only enables use of {@link AccountManagerCallback} for clients
 * which do not need to actually use the {@link AccountManagerCallback} param or return value.
 */
@CustomParcelableWrapper(originalType = AccountManagerCallback.class)
public final class NullParcelableAccountManagerCallback<F> implements Parcelable {

    /**
     * Create a wrapper for a given {@link AccountManagerCallback}.
     */
    public static <F> NullParcelableAccountManagerCallback of(
            Bundler bundler, BundlerType type,
            AccountManagerCallback<F> accountManagerCallback) {

        if (accountManagerCallback != null) {
            throw new IllegalArgumentException("accountManagerCallback can only be null");
        }

        return new NullParcelableAccountManagerCallback<F>();
    }

    private NullParcelableAccountManagerCallback() {
    }

    public AccountManagerCallback<F> get() {
        return null;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
    }

    @Override
    public int describeContents() {
        return 0;
    }

    @SuppressWarnings("rawtypes")
    public static final Creator<NullParcelableAccountManagerCallback> CREATOR =
            new Creator<NullParcelableAccountManagerCallback>() {
                @Override
                public NullParcelableAccountManagerCallback createFromParcel(Parcel in) {
                    return new NullParcelableAccountManagerCallback();
                }

                @Override
                public NullParcelableAccountManagerCallback[] newArray(int size) {
                    return new NullParcelableAccountManagerCallback[size];
                }
            };
}