This javanano_out command line option creates a container interface
at the normal place where the enum constants would reside, per enum
definition. The java_multiple_files flag would now affect the file-
scope enums with the shells. If the flag is true then file-scope
container interfaces are created in their own files.

Change-Id: Id52258fcff8d3dee9db8f3d8022147a811bf3565

This CL implements the 'optional_field_style=accessors' option.
All optional fields will now be 1 Java field and 1 bit in a shared
bitfield behind get/set/has/clear accessor methods. The setter
performs null check for reference types (Strings and byte[]s).

Also decentralized the clear code generation.

Change-Id: I60ac78329e352e76c2f8139fba1f292383080ad3

Change-Id: Ib9bb549602f71a451d2107fb04de17877553860e

enum_style = c | java: 'c' to put the enum member int constants
at the parent scope; 'java' to create uninstantiatable shell
classes at the parent scope and put the int constants inside.

optional_field_style = default | accessors: 'default' to create
one public mutable field per optional proto field; 'accessors'
to encapsulate the generated fields behind get, set, has and
clear accessors.

This CL only contains parsing code for these two parameters.

Change-Id: Iec0c3b0f30af8eb7db328e790664306bc90be089

Change-Id: I2dad2fd9f6c3d419fa77cf8162cd1ee49f74cc5d

- File class name is defined as the java_outer_classname option value
  or the file name ToCamelCase; never the single message's ClassName.
- File-scope enums are translated to constants in the file class,
  regardless of java_multiple_files.
- If java_multiple_files=true, and file's class name equals a message's
  class name, no error. This is done by detecting that the outer class
  is not needed and skipping the outer class codegen and clash checks.
  Note: there is a disparity between java[lite] and the previous
  java{micr|nan}o: when generating code for a single-message proto, the
  outer class is omitted by java{micr|nan}o if the file does not have
  java_outer_classname. This change makes java{micr|nan}o align with
  java[lite] codegen and create the outer class, but will print some
  info to warn of potential change of code.
- Also fixed the "is_own_file" detection and made all parseX() methods
  static. Previously, all messages in a java_multiple_files=true file
  are (incorrectly) considered to be in their own files, including
  nested messages, causing them to become inner classes (instance-
  bound) and forcing the parseX() methods to lose the static modifier.
- This change supersedes c/60164 and c/60086, which causes javanano to
  put enum values into enum shell classes if java_multiple_files=true.
  We now always use the parent class to host the enum values. A future
  change will add a command line option to provide more flexibility.
- Elaborated in java/README.txt.

Change-Id: I684932f90e0a028ef37c662b221def5ffa202439

Remove buggy memoization. Memoization also is too fragile for the api
because the repeated field is public.

Change-Id: I538b8426d274b22df2eeea5935023abbe7df49fe

If has is set, also always serialize.

Change-Id: I2c8450f7ab9e837d722123dd1042991c0258ede3

Depends on Ia532647fe8811d39230a23ba3671685b0388cbe0

Change-Id: I0ba3ce3561aff31e246968a79b1d1053dec91d49

Imported source files may have different values for the 'java_multiple_files'
option to the main source file's. Whether the fully qualified Java name of an
entity should include the outer class name depends on the flag value in the
file defining the referenced entity, not the main file. This CL loads the
flag values from the main and all transitively imported files into the params,
and generates the fully qualified Java names accordingly.

If the generator option 'java_multiple_files' is set, its value overrides any
in-file values in all source/imported files. This is because this generator
option is typically used on either none or all source files.

Change-Id: Id6a4a42426d68961dc669487d38f35530deb7d8e

* commit '19c4090eddf0eb4d65d1b41f283368c5e0f615a1':
  Allow NaN/+inf/-inf defaults in micro/nano.

Adds support for default values of NaN, infinity and negative
infinity for floats and doubles in both the nano and micro
java compiler.

Change-Id: Ibc43e5ebb073e51d9a8181f3aa23b72e10015dca

* commit 'a400007ed570bbcc638c05c59727b3527238ec70':
  Add contribution instructions for nano.

Change-Id: Ie110d182a84258ab5bb3ba1f67c6ada6be476c7e

* commit 'aad4b3074456fb1acec6e64596d5c18d716ac146':
  Update nano to serialize java keywords properly.

Change-Id: I7407d0fab609c336ecd73499e725aed0dd50f555

* commit '8cf17a8fbab128bda57c573e2ef7e0fafea39269':
  Make it possible to use MessageNano.mergeFrom without casting.

* commit 'eda87c5cad8cf84768bcb31d4762c6ec35a6b87d':
  Fix vanilla make build.

* commit '728a8b78917ded5ea0f3f9c331810aedcb5353f9':
  Fix the build

You can now do:

  MyMessage foo = MessageNano.mergeFrom(new MyMessage(), bytes);

without having to cast the message returned from mergeFrom.

Change-Id: Ibb2ad327f75855d45352ad304c7f054f20dd29c9

* commit '0a1429cc5ee4865550bcdddfae681a30cef58a5a':
  Nano support for extensions and unknown fields.

You can use the processor option store_unknown_fields to switch
this support on:

  aprotoc --javanano_out=store_unknown_fields=true:/tmp/out

A separate option for extensions isn't required. Support
for unknown fields must be turned on to allow storing and
retrieving extensions, because they are just stored as
unknown fields. If unknown fields are switched on, extension
related code will be generated when a proto message includes
an extension range, or an extension is encountered.

By default, store_unknown_fields is false. No additional
code is generated, and the generator will error out if protos
contain extension ranges or extensions.

Change-Id: I1e034c9e8f3305612953f72438189a7da6ed2167

* commit '9459b5c45b0ad33bea9376c2afb66cf93da610ac':
  Fix enum field references with java_multiple_files.

When the java_multiple_files option is on, enums are placed in java
class files based on the name of the original enum type. This fixes
field references to such enum values to point to the correct class
name when setting the default.

Change-Id: I51a2e251c0d0ab1e45a182ba849d314232a74bac

* commit '6f59b38386c8ff883c8e9e0a76068fa07d95bfb1':
  Add toString() method to MessageNano.

am 4e76e72b: Merge "Fix javanano compiler generating uncompileable java code. This happened for enums when java_multiple_files=true."

* commit '4e76e72b03f6dafc9ad650864b6a12b665801b9b':
  Fix javanano compiler generating uncompileable java code. This happened for enums when java_multiple_files=true.

Merge "Fix javanano compiler generating uncompileable java code. This happened for enums when java_multiple_files=true."