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Diffstat (limited to 'java/README.txt')
| -rw-r--r-- | java/README.txt | 38 |
1 files changed, 19 insertions, 19 deletions
diff --git a/java/README.txt b/java/README.txt index 0646c23..13865f6 100644 --- a/java/README.txt +++ b/java/README.txt @@ -409,33 +409,33 @@ still generated as integer constants in the message class. Nano version ============================ -Nano is even smaller than micro, especially in the number of generated -functions. It is like micro: - -- No support for descriptors and reflection; -- Enum constants are integers with no protection against invalid - values set to enum fields. - -Except: - -- Setter/getter/hazzer/clearer functions are opt-in. +Nano is a special code generator and runtime library designed specially +for Android, and is very resource-friendly in both the amount of code +and the runtime overhead. An overview of Nano features: + +- No descriptors or message builders. +- All messages are mutable; fields are public Java fields. +- For optional fields only, encapsulation behind setter/getter/hazzer/ + clearer functions is opt-in, which provide proper 'has' state support. - If not opted in, has state is not available. Serialization outputs - all fields not equal to their default. (See important implications - below.) + all fields not equal to their defaults (see important implications + below). +- Required fields are always serialized. +- Enum constants are integers; protection against invalid values only + when parsing from the wire. - Enum constants can be generated into container interfaces bearing the enum's name (so the referencing code is in Java style). -- CodedInputStreamMicro is renamed to CodedInputByteBufferNano and can - only take byte[] (not InputStream). -- Similar rename from CodedOutputStreamMicro to - CodedOutputByteBufferNano. -- Repeated fields are in arrays, not ArrayList or Vector. +- CodedInputByteBufferNano can only take byte[] (not InputStream). +- Similarly CodedOutputByteBufferNano can only write to byte[]. +- Repeated fields are in arrays, not ArrayList or Vector. Null array + elements are allowed and silently ignored. - Full support of serializing/deserializing repeated packed fields. +- Support of extensions. - Unset messages/groups are null, not an immutable empty default instance. -- Required fields are always serialized. - toByteArray(...) and mergeFrom(...) are now static functions of MessageNano. -- "bytes" are of java type byte[]. +- The 'bytes' type translates to the Java type byte[]. IMPORTANT: If you have fields with defaults and opt out of accessors |