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/*
* 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);
}
}
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