blob: a49ff78053a66db6d2e076b03b18a93203228028 [file] [log] [blame]
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
part of protobuf;
/// Unpacks the message in [value] into [instance].
///
/// Throws a [InvalidProtocolBufferException] if [typeUrl] does not correspond
/// with the type of [instance].
///
/// This is a helper method for `Any.unpackInto`.
///
/// @nodoc
void unpackIntoHelper<T extends GeneratedMessage>(
List<int> value, T instance, String typeUrl,
{ExtensionRegistry extensionRegistry = ExtensionRegistry.EMPTY}) {
// From "google/protobuf/any.proto":
//
// The pack methods provided by protobuf library will by default use
// 'type.googleapis.com/full.type.name' as the type URL and the unpack
// methods only use the fully qualified type name after the last '/'
// in the type URL, for example "foo.bar.com/x/y.z" will yield type
// name "y.z".
if (!canUnpackIntoHelper(instance, typeUrl)) {
final typeName = instance.info_.qualifiedMessageName;
throw InvalidProtocolBufferException.wrongAnyMessage(
_typeNameFromUrl(typeUrl), typeName);
}
instance.mergeFromBuffer(value, extensionRegistry);
}
/// Returns `true` if the type of [instance] is described by
/// `typeUrl`.
///
/// This is a helper method for `Any.canUnpackInto`.
///
/// @nodoc
bool canUnpackIntoHelper(GeneratedMessage instance, String typeUrl) {
return instance.info_.qualifiedMessageName == _typeNameFromUrl(typeUrl);
}
String _typeNameFromUrl(String typeUrl) {
final index = typeUrl.lastIndexOf('/');
return index == -1 ? '' : typeUrl.substring(index + 1);
}