/// <summary>
/// Retrieves a codec suitable for a group field with the given tag.
/// </summary>
/// <param name="startTag">The start group tag.</param>
/// <param name="endTag">The end group tag.</param>
/// <param name="parser">A parser to use for the group message type.</param>
/// <returns>A codec for given tag</returns>
public static FieldCodec <T> ForGroup <T>(uint startTag, uint endTag, MessageParser <T> parser) where T : class, IMessage <T>
{
return(new FieldCodec <T>(input => { T message = parser.CreateTemplate(); input.ReadGroup(message); return message; },
(output, value) => output.WriteGroup(value), (CodedInputStream i, ref T v) => {
if (v == null)
{
v = parser.CreateTemplate();
}
i.ReadGroup(v);
},
(ref T v, T v2) =>
{
if (v2 == null)
{
return v == null;
}
else if (v == null)
{
v = v2.Clone();
}
else
{
v.MergeFrom(v2);
}
return true;
}, message => CodedOutputStream.ComputeGroupSize(message), startTag, endTag));
}
/// <summary>
/// Retrieves a codec suitable for a group field with the given tag.
/// </summary>
/// <param name="startTag">The start group tag.</param>
/// <param name="endTag">The end group tag.</param>
/// <param name="parser">A parser to use for the group message type.</param>
/// <returns>A codec for given tag</returns>
public static FieldCodec <T> ForGroup <T>(uint startTag, uint endTag, MessageParser <T> parser) where T : IMessage <T>
{
return(new FieldCodec <T>(input => { T message = parser.CreateTemplate(); input.ReadGroup(message); return message; },
(output, value) => output.WriteGroup(value), message => CodedOutputStream.ComputeGroupSize(message), startTag, endTag));
}
