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/*
* Copyright (C) 2016 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.dialer.protos;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import com.android.dialer.common.Assert;
import com.google.protobuf.InvalidProtocolBufferException;
import com.google.protobuf.MessageLite;
/** Useful methods for using Protocol Buffers with Android. */
public final class ProtoParsers {
private ProtoParsers() {}
/** Retrieve a proto from a Bundle which was not created within the current executable/version. */
@SuppressWarnings("unchecked") // We want to eventually optimize away parser classes, so cast
public static <T extends MessageLite> T get(Bundle bundle, String key, T defaultInstance)
throws InvalidProtocolBufferException {
byte[] bytes = bundle.getByteArray(key);
return (T) mergeFrom(bytes, defaultInstance.getDefaultInstanceForType());
}
/**
* Retrieve a proto from a trusted bundle which was created within the current executable/version.
*
* @throws RuntimeException if the proto cannot be parsed
*/
public static <T extends MessageLite> T getTrusted(Bundle bundle, String key, T defaultInstance) {
try {
return get(bundle, key, defaultInstance);
} catch (InvalidProtocolBufferException e) {
throw Assert.createIllegalStateFailException(e.toString());
}
}
/**
* Retrieve a proto from a trusted bundle which was created within the current executable/version.
*
* @throws RuntimeException if the proto cannot be parsed
*/
public static <T extends MessageLite> T getTrusted(Intent intent, String key, T defaultInstance) {
return getTrusted(intent.getExtras(), key, defaultInstance);
}
/**
* Stores a proto in a Bundle, for later retrieval by {@link #get(Bundle, String, MessageLite)} or
* {@link #getFromInstanceState(Bundle, String, MessageLite)}.
*/
public static void put(
@NonNull Bundle bundle, @NonNull String key, @NonNull MessageLite message) {
Assert.checkState(message != null);
bundle.putByteArray(key, message.toByteArray());
}
/**
* Stores a proto in an Intent, for later retrieval by {@link #get(Bundle, String, MessageLite)}.
* Needs separate method because Intent has similar to but different API than Bundle.
*/
public static void put(@NonNull Intent intent, @NonNull String key, MessageLite message) {
Assert.checkState(message != null);
intent.putExtra(key, message.toByteArray());
}
/** Parses a proto, throwing parser errors as runtime exceptions. */
@SuppressWarnings("unchecked") // We want to eventually optimize away parser classes
private static <T extends MessageLite> T mergeFrom(byte[] bytes, T defaultInstance) {
try {
return (T) defaultInstance.toBuilder().mergeFrom(bytes).build();
} catch (InvalidProtocolBufferException e) {
throw Assert.createIllegalStateFailException(e.toString());
}
}
}
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