Merge "Move AsyncResultCallback from Euicc to platform."

/*

 * Copyright (C) 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 com.android.internal.telephony.uicc.euicc.async;

/**

 * Class to deliver the returned value from an asynchronous call. Either {@link #onResult(Result)}

 * or {@link #onException(Throwable)} will be called. You can create an anonymous subclass and

 * override these methods to handle the result or the throwable from an asynchronous call, for

 * example:

 *

 * <pre>

 *     doSomethingAsync(

 *             new AsyncResultCallback<Result>() {

 *                 void onResult(Result r) {

 *                     Log.i("Got the result: %s", r.toString());

 *                 }

 *

 *                 void onException(Throwable e) {...}

 *             });

 * <pre>

 *

 * @param <Result> The returned value of the asynchronous call.

 * @hide

 */

public abstract class AsyncResultCallback<Result> {

    /** This will be called when the result is returned. */

    public abstract void onResult(Result result);

    /** This will be called when any exception is thrown. */

    public void onException(Throwable e) {}

}

/*

 * Copyright (C) 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 com.android.internal.telephony.uicc.euicc.async;

import android.annotation.Nullable;

import android.os.Handler;

/**

 * Helper on {@link AsyncResultCallback}.

 *

 * @hide

 */

public final class AsyncResultHelper {

    /**

     * Calls the {@code callback} to return the {@code result} object. The {@code callback} will be

     * run in the {@code handler}. If the {@code handler} is null, the callback will be called

     * immediately.

     *

     * @param <T> Result type.

     */

    public static <T> void returnResult(

            final T result, final AsyncResultCallback<T> callback, @Nullable Handler handler) {

        if (handler == null) {

            callback.onResult(result);

        } else {

            handler.post(

                    new Runnable() {

                        @Override

                        public void run() {

                            callback.onResult(result);

                        }

                    });

        }

    }

    /**

     * Calls the {@code callback} to return the thrown {@code e} exception. The {@code callback}

     * will be run in the {@code handler}. If the {@code handler} is null, the callback will be

     * called immediately.

     */

    public static void throwException(

            final Throwable e, final AsyncResultCallback<?> callback, @Nullable Handler handler) {

        if (handler == null) {

            callback.onException(e);

        } else {

            handler.post(

                    new Runnable() {

                        @Override

                        public void run() {

                            callback.onException(e);

                        }

                    });

        }

    }

    private AsyncResultHelper() {}

}