Returns the EnumDescriptor for enum type E, which must be a proto-declared enum type.

Code generated by the protocol compiler will include specializations of this template for each enum type declared.

Get a struct containing the metadata for the Message.

Most subclasses only need to implement this method, rather than the GetDescriptor() and GetReflection() wrappers.

Get a Descriptor for this message's type.

This describes what fields the message contains, the types of those fields, etc.

Get the Reflection interface for this Message, which can be used to read and modify the fields of the Message dynamically (in other words, without knowing the message type at compile time).

This object remains property of the Message.

This method remains virtual in case a subclass does not implement reflection and wants to override the default behavior.

Construct a new instance of the same type.

Ownership is passed to the caller. (This is also defined in MessageLite, but is defined again here for return-type covariance.)

Make this message into a copy of the given message.

The given message must have the same descriptor, but need not necessarily be the same class. By default this is just implemented as "Clear(); MergeFrom(from);".

Merge the fields from the given message into this message.

Singular fields will be overwritten, except for embedded messages which will be merged. Repeated fields will be concatenated. The given message must be of the same type as this message (i.e. the exact same class).

Verifies that IsInitialized() returns true.

GOOGLE_CHECK-fails otherwise, with a nice error message.

Slowly build a list of all required fields that are not set.

This is much, much slower than IsInitialized() as it is implemented purely via reflection. Generally, you should not call this unless you have already determined that an error exists by calling IsInitialized().

Clears all unknown fields from this message and all embedded messages.

Normally, if unknown tag numbers are encountered when parsing a message, the tag and value are stored in the message's UnknownFieldSet and then written back out when the message is serialized. This allows servers which simply route messages to other servers to pass through messages that have new field definitions which they don't yet know about. However, this behavior can have security implications. To avoid it, call this method after parsing.

See Reflection::GetUnknownFields() for more on unknown fields.

Computes (an estimate of) the total number of bytes currently used for storing the message in memory.

The default implementation calls the Reflection object's SpaceUsed() method.

Parse a protocol buffer from a file descriptor.

If successful, the entire input will be consumed.

Parse a protocol buffer from a C++ istream.

If successful, the entire input will be consumed.

Serialize the message and write it to the given file descriptor.

All required fields must be set.

Serialize the message and write it to the given C++ ostream.

All required fields must be set.

Clear all fields of the message and set them to their default values.

Clear() avoids freeing memory, assuming that any memory allocated to hold parts of the message will be needed again to hold the next message. If you actually want to free the memory used by a Message, you must delete it.

If |other| is the exact same class as this, calls MergeFrom().

Otherwise, results are undefined (probably crash).

Like MergeFromCodedStream(), but succeeds even if required fields are missing in the input.

MergeFromCodedStream() is just implemented as MergePartialFromCodedStream() followed by IsInitialized().

Computes the serialized size of the message.

This recursively calls ByteSize() on all embedded messages. If a subclass does not override this, it MUST override SetCachedSize().

Serializes the message without recomputing the size.

The message must not have changed since the last call to ByteSize(); if it has, the results are undefined.

Get the UnknownFieldSet for the message.

This contains fields which were seen when the Message was parsed but were not recognized according to the Message's definition.

Get a mutable pointer to the UnknownFieldSet for the message.

This contains fields which were seen when the Message was parsed but were not recognized according to the Message's definition.

Remove the last element of a repeated field.

We don't provide a way to remove any element other than the last because it invites inefficient use, such as O(n^2) filtering loops that should have been O(n). If you want to remove an element other than the last, the best way to do it is to re-arrange the elements (using Swap()) so that the one you want removed is at the end, then call RemoveLast().

List all fields of the message which are currently set.

This includes extensions. Singular fields will only be listed if HasField(field) would return true and repeated fields will only be listed if FieldSize(field) would return non-zero. Fields (both normal fields and extension fields) will be listed ordered by field number.

Get a string value without copying, if possible.

GetString() necessarily returns a copy of the string. This can be inefficient when the string is already stored in a string object in the underlying message. GetStringReference() will return a reference to the underlying string in this case. Otherwise, it will copy the string into scratch and return that.

Note: It is perfectly reasonable and useful to write code like:

str = reflection->GetStringReference(field, &str);

This line would ensure that only one copy of the string is made regardless of the field's underlying representation. When initializing a newly-constructed string, though, it's just as fast and more readable to use code like:

string str = reflection->GetString(field);

Try to find an extension of this message type by fully-qualified field name.

Returns NULL if no extension is known for this name or number.

Try to find an extension of this message type by field number.

Returns NULL if no extension is known for this name or number.

Given a Descriptor, gets or constructs the default (prototype) Message of that type.

You can then call that message's New() method to construct a mutable message of that type.

Calling this method twice with the same Descriptor returns the same object. The returned object remains property of the factory. Also, any objects created by calling the prototype's New() method share some data with the prototype, so these must be destoyed before the MessageFactory is destroyed.

The given descriptor must outlive the returned message, and hence must outlive the MessageFactory.

Some implementations do not support all types. GetPrototype() will return NULL if the descriptor passed in is not supported.

This method may or may not be thread-safe depending on the implementation. Each implementation should document its own degree thread-safety.

Gets a MessageFactory which supports all generated, compiled-in messages.

In other words, for any compiled-in type FooMessage, the following is true:

MessageFactory::generated_factory()->GetPrototype(
  FooMessage::descriptor()) == FooMessage::default_instance()

This factory supports all types which are found in DescriptorPool::generated_pool(). If given a descriptor from any other pool, GetPrototype() will return NULL. (You can also check if a descriptor is for a generated message by checking if descriptor->file()->pool() == DescriptorPool::generated_pool().)

This factory is 100% thread-safe; calling GetPrototype() does not modify any shared data.

This factory is a singleton. The caller must not delete the object.

For internal use only: Registers a .proto file at static initialization time, to be placed in generated_factory.

The first time GetPrototype() is called with a descriptor from this file, |register_messages| will be called, with the file name as the parameter. It must call InternalRegisterGeneratedMessage() (below) to register each message type in the file. This strange mechanism is necessary because descriptors are built lazily, so we can't register types by their descriptor until we know that the descriptor exists. |filename| must be a permanent string.

For internal use only: Registers a message type.

Called only by the functions which are registered with InternalRegisterGeneratedFile(), above.