91 lines
3.0 KiB
Java
91 lines
3.0 KiB
Java
/*
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* Copyright (C) 2017 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.os;
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import java.io.IOException;
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/**
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* Wrapper class that offers to transport typical {@link Throwable} across a
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* {@link Binder} call. This class is typically used to transport exceptions
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* that cannot be modified to add {@link Parcelable} behavior, such as
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* {@link IOException}.
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* <ul>
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* <li>The wrapped throwable must be defined as system class (that is, it must
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* be in the same {@link ClassLoader} as {@link Parcelable}).
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* <li>The wrapped throwable must support the
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* {@link Throwable#Throwable(String)} constructor.
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* <li>The receiver side must catch any thrown {@link ParcelableException} and
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* call {@link #maybeRethrow(Class)} for all expected exception types.
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* </ul>
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*
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* @hide
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*/
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public final class ParcelableException extends RuntimeException implements Parcelable {
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public ParcelableException(Throwable t) {
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super(t);
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}
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@SuppressWarnings("unchecked")
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public <T extends Throwable> void maybeRethrow(Class<T> clazz) throws T {
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if (clazz.isAssignableFrom(getCause().getClass())) {
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throw (T) getCause();
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}
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}
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/** {@hide} */
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public static Throwable readFromParcel(Parcel in) {
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final String name = in.readString();
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final String msg = in.readString();
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try {
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final Class<?> clazz = Class.forName(name, true, Parcelable.class.getClassLoader());
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if (Throwable.class.isAssignableFrom(clazz)) {
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return (Throwable) clazz.getConstructor(String.class).newInstance(msg);
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}
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} catch (ReflectiveOperationException e) {
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}
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return new RuntimeException(name + ": " + msg);
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}
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/** {@hide} */
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public static void writeToParcel(Parcel out, Throwable t) {
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out.writeString(t.getClass().getName());
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out.writeString(t.getMessage());
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}
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@Override
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public int describeContents() {
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return 0;
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}
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@Override
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public void writeToParcel(Parcel dest, int flags) {
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writeToParcel(dest, getCause());
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}
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public static final @android.annotation.NonNull Creator<ParcelableException> CREATOR = new Creator<ParcelableException>() {
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@Override
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public ParcelableException createFromParcel(Parcel source) {
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return new ParcelableException(readFromParcel(source));
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}
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@Override
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public ParcelableException[] newArray(int size) {
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return new ParcelableException[size];
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}
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};
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}
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