Class AbstractMessage.Builder<BuilderType> (3.19.4)

A partial implementation of the Message.Builder interface which implements as many methods of that interface as possible in terms of other methods.

Construct an UninitializedMessageException reporting missing fields in the given message.

Resets all fields to their default values.

TODO(jieluo): Clear it when all subclasses have implemented this method.

Clones the Builder.

Returns a list of field paths (e.g. "foo.bar.baz") of required fields which are not set in this message. You should call MessageLiteOrBuilder#isInitialized() first to check if there are any missing fields, as that method is likely to be much faster than this one even when the message is fully-initialized.

Get a nested builder instance for the given field.

Normally, we hold a reference to the immutable message object for the message type field. Some implementations(the generated message builders), however, can also hold a reference to the builder object (a nested builder) for the field.

If the field is already backed up by a nested builder, the nested builder will be returned. Otherwise, a new field builder will be created and returned. The original message field (if exist) will be merged into the field builder, which will then be nested into its parent builder.

NOTE: implementations that do not support nested builders will throw UnsupportedOperationException.

Returns a comma-delimited list of required fields which are not set in this message object. You should call MessageLiteOrBuilder#isInitialized() first to check if there are any missing fields, as that method is likely to be much faster than this one even when the message is fully-initialized.

TODO(jieluo): Clear it when all subclasses have implemented this method.

Get a nested builder instance for the given repeated field instance.

Normally, we hold a reference to the immutable message object for the message type field. Some implementations(the generated message builders), however, can also hold a reference to the builder object (a nested builder) for the field.

If the field is already backed up by a nested builder, the nested builder will be returned. Otherwise, a new field builder will be created and returned. The original message field (if exist) will be merged into the field builder, which will then be nested into its parent builder.

NOTE: implementations that do not support nested builders will throw UnsupportedOperationException.

TODO(jieluo): Clear it when all subclasses have implemented this method.

Like #mergeFrom(InputStream), but does not read until EOF. Instead, the size of the message (encoded as a varint) is read first, then the message data. Use MessageLite#writeDelimitedTo(OutputStream) to write messages in this format.

Like #mergeDelimitedFrom(InputStream) but supporting extensions.

Parse data as a message of this type and merge it with the message being built. This is just a small wrapper around #mergeFrom(CodedInputStream).

Parse data as a message of this type and merge it with the message being built. This is just a small wrapper around #mergeFrom(CodedInputStream,ExtensionRegistryLite).

Parse data as a message of this type and merge it with the message being built. This is just a small wrapper around #mergeFrom(CodedInputStream).

Parse data as a message of this type and merge it with the message being built. This is just a small wrapper around #mergeFrom(CodedInputStream,ExtensionRegistryLite).

Parse data as a message of this type and merge it with the message being built. This is just a small wrapper around #mergeFrom(CodedInputStream).

Parse data as a message of this type and merge it with the message being built. This is just a small wrapper around #mergeFrom(CodedInputStream,ExtensionRegistryLite).

Parses a message of this type from the input and merges it with this message.

Warning: This does not verify that all required fields are present in the input message. If you call #build() without setting all required fields, it will throw an UninitializedMessageException, which is a RuntimeException and thus might not be caught. There are a few good ways to deal with this:

• Call #isInitialized() to verify that all required fields are set before building.
• Use buildPartial() to build, which ignores missing required fields.

Note: The caller should call CodedInputStream#checkLastTagWas(int) after calling this to verify that the last tag seen was the appropriate end-group tag, or zero for EOF.

Like Builder#mergeFrom(CodedInputStream), but also parses extensions. The extensions that you want to be able to parse must be registered in extensionRegistry. Extensions not in the registry will be treated as unknown fields.

Merge other into the message being built. other must have the exact same type as this (i.e. getDescriptorForType() == other.getDescriptorForType()).

Merging occurs as follows. For each field:

• For singular primitive fields, if the field is set in other, then other's value overwrites the value in this message.
  
• For singular message fields, if the field is set in other, it is merged into the corresponding sub-message of this message using the same merging rules.
  
• For repeated fields, the elements in other are concatenated with the elements in this message.
  

• For oneof groups, if the other message has one of the fields set, the group of this message is cleared and replaced by the field of the other message, so that the oneof constraint is preserved.

  This is equivalent to the Message::MergeFrom method in C++.

Parse a message of this type from input and merge it with the message being built. This is just a small wrapper around #mergeFrom(CodedInputStream). Note that this method always reads the entire input (unless it throws an exception). If you want it to stop earlier, you will need to wrap your input in some wrapper stream that limits reading. Or, use MessageLite#writeDelimitedTo(OutputStream) to write your message and #mergeDelimitedFrom(InputStream) to read it.

Despite usually reading the entire input, this does not close the stream.

Parse a message of this type from input and merge it with the message being built. This is just a small wrapper around #mergeFrom(CodedInputStream,ExtensionRegistryLite).

Merge some unknown fields into the UnknownFieldSet for this message.