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namespace Google.ProtocolBuffers.FieldAccess {
/// <summary>
/// Allows fields to be reflectively accessed in a smart manner.
/// The property descriptors for each field are created once and then cached.
/// In addition, this interface holds knowledge of repeated fields, builders etc.
/// </summary>
internal interface IFieldAccessor<TMessage, TBuilder>
where TMessage : IMessage<TMessage>
where TBuilder : IBuilder<TMessage> {
/// <summary>
/// Indicates whether the specified message contains the field.
/// </summary>
bool Has(IMessage<TMessage> message);
/// <summary>
/// Gets the count of the repeated field in the specified message.
/// </summary>
int GetRepeatedCount(IMessage<TMessage> message);
/// <summary>
/// Clears the field in the specified builder.
/// </summary>
/// <param name="builder"></param>
void Clear(IBuilder<TMessage> builder);
/// <summary>
/// Creates a builder for the type of this field (which must be a message field).
/// </summary>
IBuilder CreateBuilder();
/// <summary>
/// Accessor for single fields
/// </summary>
object GetValue(IMessage<TMessage> message);
/// <summary>
/// Mutator for single fields
/// </summary>
void SetValue(IBuilder<TMessage> builder, object value);
/// <summary>
/// Accessor for repeated fields
/// </summary>
object GetRepeatedValue(IMessage<TMessage> message, int index);
/// <summary>
/// Mutator for repeated fields
/// </summary>
void SetRepeated(IBuilder<TMessage> builder, int index, object value);
/// <summary>
/// Adds the specified value to the field in the given builder.
/// </summary>
void AddRepeated(IBuilder<TMessage> builder, object value);
/// <summary>
/// Returns a read-only wrapper around the value of a repeated field.
/// </summary>
object GetRepeatedWrapper(IBuilder<TMessage> builder);
}
}
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