Base class for static-typed (no dccl::any) field encoders/decoders. Most single-valued user defined variable length codecs will start with this class. Use TypedFixedFieldCodec if your codec is fixed length (always uses the same number of bits on the wire) or RepeatedTypedFieldCodec if your codec has special behavior for repeated (vector) fields.
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virtual Bitset | encode ()=0 |
| Encode an empty field. More...
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virtual Bitset | encode (const WireType &wire_value)=0 |
| Encode a non-empty field. More...
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virtual WireType | decode (Bitset *bits)=0 |
| Decode a field. If the field is empty (i.e. was encoded using the zero-argument encode()), throw NullValueException to indicate this. More...
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virtual unsigned | size ()=0 |
| Calculate the size (in bits) of an empty field. More...
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virtual unsigned | size (const WireType &wire_value)=0 |
| Calculate the size (in bits) of a non-empty field. More...
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virtual WireType | pre_encode (const WireType &field_value)=0 |
| Convert from the FieldType representation (used in the Google Protobuf message) to the WireType representation (used with encode() and decode(), i.e. "on the wire"). More...
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virtual WireType | post_decode (const WireType &wire_value)=0 |
| Convert from the WireType representation (used with encode() and decode(), i.e. "on the wire") to the FieldType representation (used in the Google Protobuf message). More...
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| FieldCodecBase () |
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virtual | ~FieldCodecBase ()=default |
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void | base_encode (Bitset *bits, const google::protobuf::Message &msg, MessagePart part, bool strict) |
| Encode this part (body or head) of the base message. More...
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void | base_size (unsigned *bit_size, const google::protobuf::Message &msg, MessagePart part) |
| Calculate the size (in bits) of a part of the base message when it is encoded. More...
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void | base_decode (Bitset *bits, google::protobuf::Message *msg, MessagePart part) |
| Decode part of a message. More...
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void | base_max_size (unsigned *bit_size, const google::protobuf::Descriptor *desc, MessagePart part) |
| Calculate the maximum size of a message given its Descriptor alone (no data) More...
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void | base_min_size (unsigned *bit_size, const google::protobuf::Descriptor *desc, MessagePart part) |
| Calculate the minimum size of a message given its Descriptor alone (no data) More...
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void | base_validate (const google::protobuf::Descriptor *desc, MessagePart part) |
| Validate this part of the message to make sure all required extensions are set. More...
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void | base_info (std::ostream *os, const google::protobuf::Descriptor *desc, MessagePart part) |
| Get human readable information (size of fields, etc.) about this part of the DCCL message. More...
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void | base_hash (std::size_t *hash, const google::protobuf::Descriptor *desc, MessagePart part) |
| Provide a hash of the DCCL message definition to detect changes in the DCCL message. More...
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std::string | name () const |
| the name of the codec used to identifier it in the .proto custom option extension
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google::protobuf::FieldDescriptor::Type | field_type () const |
| the type exposed to the user in the original and decoded Protobuf messages More...
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google::protobuf::FieldDescriptor::CppType | wire_type () const |
| the C++ type used "on the wire". This is the type visible after pre_encode and before post_decode functions are called. More...
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const google::protobuf::FieldDescriptor * | this_field () const |
| Returns the FieldDescriptor (field schema meta-data) for this field. More...
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const google::protobuf::Descriptor * | this_descriptor () const |
| Returns the Descriptor (message schema meta-data) for the immediate parent Message. More...
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const google::protobuf::Message * | this_message () |
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const google::protobuf::Message * | root_message () |
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const google::protobuf::Descriptor * | root_descriptor () const |
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internal::MessageStackData & | message_data () |
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const internal::MessageStackData & | message_data () const |
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bool | has_codec_group () |
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std::string | codec_group () |
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int | codec_version () |
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MessagePart | part () |
| the part of the message currently being encoded (head or body)
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bool | strict () |
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void | set_force_use_required (bool force_required=true) |
| Force the codec to always use the "required" field encoding, regardless of the FieldDescriptor setting. Useful when wrapping this codec in another that handles optional and repeated fields.
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void | field_pre_encode (dccl::any *wire_value, const dccl::any &field_value) |
| Pre-encodes a non-repeated (i.e. optional or required) field by converting the FieldType representation (the Google Protobuf representation) into the WireType representation (the type used in the encoded DCCL message). This allows for type-converting codecs. More...
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void | field_pre_encode_repeated (std::vector< dccl::any > *wire_values, const std::vector< dccl::any > &field_values) |
| Pre-encodes a repeated field. More...
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void | field_encode (Bitset *bits, const dccl::any &field_value, const google::protobuf::FieldDescriptor *field) |
| Encode a non-repeated field. More...
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void | field_encode_repeated (Bitset *bits, const std::vector< dccl::any > &field_values, const google::protobuf::FieldDescriptor *field) |
| Encode a repeated field. More...
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void | field_size (unsigned *bit_size, const dccl::any &field_value, const google::protobuf::FieldDescriptor *field) |
| Calculate the size of a field. More...
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void | field_size_repeated (unsigned *bit_size, const std::vector< dccl::any > &field_values, const google::protobuf::FieldDescriptor *field) |
| Calculate the size of a repeated field. More...
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void | field_decode (Bitset *bits, dccl::any *field_value, const google::protobuf::FieldDescriptor *field) |
| Decode a non-repeated field. More...
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void | field_decode_repeated (Bitset *bits, std::vector< dccl::any > *field_values, const google::protobuf::FieldDescriptor *field) |
| Decode a repeated field. More...
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void | field_post_decode (const dccl::any &wire_value, dccl::any *field_value) |
| Post-decodes a non-repeated (i.e. optional or required) field by converting the WireType (the type used in the encoded DCCL message) representation into the FieldType representation (the Google Protobuf representation). This allows for type-converting codecs. More...
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void | field_post_decode_repeated (const std::vector< dccl::any > &wire_values, std::vector< dccl::any > *field_values) |
| Post-decodes a repeated field. More...
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void | field_max_size (unsigned *bit_size, const google::protobuf::FieldDescriptor *field) |
| Calculate the upper bound on this field's size (in bits) More...
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void | field_min_size (unsigned *bit_size, const google::protobuf::FieldDescriptor *field) |
| Calculate the lower bound on this field's size (in bits) More...
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void | field_validate (bool *b, const google::protobuf::FieldDescriptor *field) |
| Validate this field, checking that all required option extensions are set (e.g. (dccl.field).max and (dccl.field).min for arithmetic codecs) More...
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void | field_info (std::ostream *os, const google::protobuf::FieldDescriptor *field) |
| Write human readable information about the field and its bounds to the provided stream. More...
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void | field_hash (std::size_t *hash, const google::protobuf::FieldDescriptor *field) |
| Provide a hash for this field definition. More...
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dccl::DCCLFieldOptions | dccl_field_options () const |
| Get the DCCL field option extension value for the current field. More...
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void | require (bool b, const std::string &description) |
| Essentially an assertion to be used in the validate() virtual method. More...
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DynamicConditions & | dynamic_conditions (const google::protobuf::FieldDescriptor *field) |
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FieldCodecManagerLocal & | manager () |
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const FieldCodecManagerLocal & | manager () const |
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virtual void | set_manager (FieldCodecManagerLocal *manager) |
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template<typename WireType, typename FieldType = WireType>
class dccl::TypedFieldCodec< WireType, FieldType >
Base class for static-typed (no dccl::any) field encoders/decoders. Most single-valued user defined variable length codecs will start with this class. Use TypedFixedFieldCodec if your codec is fixed length (always uses the same number of bits on the wire) or RepeatedTypedFieldCodec if your codec has special behavior for repeated (vector) fields.
- Template Parameters
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WireType | the type used for the encode and decode functions. This can be any C++ type, and is often the same as FieldType, unless a type conversion should be performed. The reason for using a different WireType and FieldType should be clear from the DefaultEnumCodec which uses DefaultNumericFieldCodec to do all the numerical encoding / decoding while DefaultEnumCodec does the type conversion (pre_encode() and post_decode()). |
FieldType | the type used in the Google Protobuf message that is exposed to the end-user Codec::decode(), Codec::encode(), etc. functions. |
Definition at line 72 of file field_codec_typed.h.