103 lines
3.1 KiB
Java
103 lines
3.1 KiB
Java
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/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.util;
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import android.annotation.NonNull;
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import android.annotation.Nullable;
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import android.os.ParcelableException;
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import com.android.internal.util.Preconditions;
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import java.io.IOException;
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/**
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* Utility methods for proxying richer exceptions across Binder calls.
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*
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* @hide
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*/
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public class ExceptionUtils {
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public static RuntimeException wrap(IOException e) {
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throw new ParcelableException(e);
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}
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public static void maybeUnwrapIOException(RuntimeException e) throws IOException {
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if (e instanceof ParcelableException) {
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((ParcelableException) e).maybeRethrow(IOException.class);
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}
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}
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public static String getCompleteMessage(String msg, Throwable t) {
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final StringBuilder builder = new StringBuilder();
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if (msg != null) {
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builder.append(msg).append(": ");
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}
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builder.append(t.getMessage());
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while ((t = t.getCause()) != null) {
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builder.append(": ").append(t.getMessage());
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}
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return builder.toString();
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}
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public static String getCompleteMessage(Throwable t) {
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return getCompleteMessage(null, t);
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}
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public static <E extends Throwable> void propagateIfInstanceOf(
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@Nullable Throwable t, Class<E> c) throws E {
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if (t != null && c.isInstance(t)) {
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throw c.cast(t);
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}
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}
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/**
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* @param <E> a checked exception that is ok to throw without wrapping
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*/
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public static <E extends Exception> RuntimeException propagate(@NonNull Throwable t, Class<E> c)
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throws E {
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propagateIfInstanceOf(t, c);
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return propagate(t);
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}
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public static RuntimeException propagate(@NonNull Throwable t) {
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Preconditions.checkNotNull(t);
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propagateIfInstanceOf(t, Error.class);
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propagateIfInstanceOf(t, RuntimeException.class);
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throw new RuntimeException(t);
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}
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/**
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* Gets the root {@link Throwable#getCause() cause} of {@code t}
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*/
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public static @NonNull Throwable getRootCause(@NonNull Throwable t) {
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while (t.getCause() != null) t = t.getCause();
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return t;
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}
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/**
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* Appends {@code cause} at the end of the causal chain of {@code t}
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*
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* @return {@code t} for convenience
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*/
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public static @NonNull Throwable appendCause(@NonNull Throwable t, @Nullable Throwable cause) {
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if (cause != null) {
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getRootCause(t).initCause(cause);
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}
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return t;
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}
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}
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