public void LegacyGeneratedCodeThrowsWithReadOnlySequence()
{
var message = new ParseContextEnabledMessageB
{
A = new LegacyGeneratedCodeMessageA
{
Bb = new ParseContextEnabledMessageB {
OptionalInt32 = 12345
}
},
OptionalInt32 = 6789
};
var data = message.ToByteArray();
// if parsing started using ReadOnlySequence and we don't have a CodedInputStream
// instance at hand, we cannot fall back to the legacy MergeFrom(CodedInputStream)
// method and parsing will fail. As a consequence, one can only use parsing
// from ReadOnlySequence if all the messages in the parsing tree have their generated
// code up to date.
var exception = Assert.Throws <InvalidProtocolBufferException>(() =>
{
ParseContext.Initialize(new ReadOnlySequence <byte>(data), out ParseContext parseCtx);
var parsed = new ParseContextEnabledMessageB();
ParsingPrimitivesMessages.ReadRawMessage(ref parseCtx, parsed);
});
Assert.AreEqual($"Message {typeof(LegacyGeneratedCodeMessageA).Name} doesn't provide the generated method that enables ParseContext-based parsing. You might need to regenerate the generated protobuf code.", exception.Message);
}
internal static void MergeFrom(this IMessage message, ReadOnlySpan <byte> data, bool discardUnknownFields, ExtensionRegistry registry)
{
ParseContext.Initialize(data, out ParseContext ctx);
ctx.DiscardUnknownFields = discardUnknownFields;
ctx.ExtensionRegistry = registry;
ParsingPrimitivesMessages.ReadRawMessage(ref ctx, message);
ParsingPrimitivesMessages.CheckReadEndOfStreamTag(ref ctx.state);
}
/// <summary>
/// Reads a top-level message or a nested message after the limits for this message have been pushed.
/// (parser will proceed until the end of the current limit)
/// NOTE: this method needs to be public because it's invoked by the generated code - e.g. msg.MergeFrom(CodedInputStream input) method
/// </summary>
public void ReadRawMessage(IMessage message)
{
ParseContext.Initialize(this, out ParseContext ctx);
try
{
ParsingPrimitivesMessages.ReadRawMessage(ref ctx, message);
}
finally
{
ctx.CopyStateTo(this);
}
}
