| /* |
| * Copyright (C) 2014 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 android.util; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.os.ParcelableException; |
| |
| import com.android.internal.util.Preconditions; |
| |
| import java.io.IOException; |
| |
| /** |
| * Utility methods for proxying richer exceptions across Binder calls. |
| * |
| * @hide |
| */ |
| public class ExceptionUtils { |
| public static RuntimeException wrap(IOException e) { |
| throw new ParcelableException(e); |
| } |
| |
| public static void maybeUnwrapIOException(RuntimeException e) throws IOException { |
| if (e instanceof ParcelableException) { |
| ((ParcelableException) e).maybeRethrow(IOException.class); |
| } |
| } |
| |
| public static String getCompleteMessage(String msg, Throwable t) { |
| final StringBuilder builder = new StringBuilder(); |
| if (msg != null) { |
| builder.append(msg).append(": "); |
| } |
| builder.append(t.getMessage()); |
| while ((t = t.getCause()) != null) { |
| builder.append(": ").append(t.getMessage()); |
| } |
| return builder.toString(); |
| } |
| |
| public static String getCompleteMessage(Throwable t) { |
| return getCompleteMessage(null, t); |
| } |
| |
| public static <E extends Throwable> void propagateIfInstanceOf( |
| @Nullable Throwable t, Class<E> c) throws E { |
| if (t != null && c.isInstance(t)) { |
| throw c.cast(t); |
| } |
| } |
| |
| /** |
| * @param <E> a checked exception that is ok to throw without wrapping |
| */ |
| public static <E extends Exception> RuntimeException propagate(@NonNull Throwable t, Class<E> c) |
| throws E { |
| propagateIfInstanceOf(t, c); |
| return propagate(t); |
| } |
| |
| public static RuntimeException propagate(@NonNull Throwable t) { |
| Preconditions.checkNotNull(t); |
| propagateIfInstanceOf(t, Error.class); |
| propagateIfInstanceOf(t, RuntimeException.class); |
| throw new RuntimeException(t); |
| } |
| |
| /** |
| * Gets the root {@link Throwable#getCause() cause} of {@code t} |
| */ |
| public static @NonNull Throwable getRootCause(@NonNull Throwable t) { |
| while (t.getCause() != null) t = t.getCause(); |
| return t; |
| } |
| } |