| // Protocol Buffers - Google's data interchange format |
| // Copyright 2008 Google Inc. All rights reserved. |
| // |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file or at |
| // https://developers.google.com/open-source/licenses/bsd |
| |
| package com.google.protobuf; |
| |
| import java.io.IOException; |
| |
| @ExperimentalApi |
| @CheckReturnValue |
| abstract class UnknownFieldSchema<T, B> { |
| |
| /** Whether unknown fields should be dropped. */ |
| abstract boolean shouldDiscardUnknownFields(Reader reader); |
| |
| /** Adds a varint value to the unknown fields. */ |
| abstract void addVarint(B fields, int number, long value); |
| |
| /** Adds a fixed32 value to the unknown fields. */ |
| abstract void addFixed32(B fields, int number, int value); |
| |
| /** Adds a fixed64 value to the unknown fields. */ |
| abstract void addFixed64(B fields, int number, long value); |
| |
| /** Adds a length delimited value to the unknown fields. */ |
| abstract void addLengthDelimited(B fields, int number, ByteString value); |
| |
| /** Adds a group value to the unknown fields. */ |
| abstract void addGroup(B fields, int number, T subFieldSet); |
| |
| /** Create a new builder for unknown fields. */ |
| abstract B newBuilder(); |
| |
| /** Returns an immutable instance of the field container. */ |
| abstract T toImmutable(B fields); |
| |
| /** |
| * Sets the unknown fields into the message. Caller must take care of the mutability of the |
| * fields. |
| */ |
| abstract void setToMessage(Object message, T fields); |
| |
| /** Get the unknown fields from the message. */ |
| abstract T getFromMessage(Object message); |
| |
| /** Returns a builder for unknown fields in the message. */ |
| abstract B getBuilderFromMessage(Object message); |
| |
| /** Sets an unknown field builder into the message. */ |
| abstract void setBuilderToMessage(Object message, B builder); |
| |
| /** Marks unknown fields as immutable. */ |
| abstract void makeImmutable(Object message); |
| |
| /** Merges one field into the unknown fields. */ |
| final boolean mergeOneFieldFrom(B unknownFields, Reader reader) throws IOException { |
| int tag = reader.getTag(); |
| int fieldNumber = WireFormat.getTagFieldNumber(tag); |
| switch (WireFormat.getTagWireType(tag)) { |
| case WireFormat.WIRETYPE_VARINT: |
| addVarint(unknownFields, fieldNumber, reader.readInt64()); |
| return true; |
| case WireFormat.WIRETYPE_FIXED32: |
| addFixed32(unknownFields, fieldNumber, reader.readFixed32()); |
| return true; |
| case WireFormat.WIRETYPE_FIXED64: |
| addFixed64(unknownFields, fieldNumber, reader.readFixed64()); |
| return true; |
| case WireFormat.WIRETYPE_LENGTH_DELIMITED: |
| addLengthDelimited(unknownFields, fieldNumber, reader.readBytes()); |
| return true; |
| case WireFormat.WIRETYPE_START_GROUP: |
| final B subFields = newBuilder(); |
| int endGroupTag = WireFormat.makeTag(fieldNumber, WireFormat.WIRETYPE_END_GROUP); |
| mergeFrom(subFields, reader); |
| if (endGroupTag != reader.getTag()) { |
| throw InvalidProtocolBufferException.invalidEndTag(); |
| } |
| addGroup(unknownFields, fieldNumber, toImmutable(subFields)); |
| return true; |
| case WireFormat.WIRETYPE_END_GROUP: |
| return false; |
| default: |
| throw InvalidProtocolBufferException.invalidWireType(); |
| } |
| } |
| |
| final void mergeFrom(B unknownFields, Reader reader) throws IOException { |
| while (true) { |
| if (reader.getFieldNumber() == Reader.READ_DONE |
| || !mergeOneFieldFrom(unknownFields, reader)) { |
| break; |
| } |
| } |
| } |
| |
| abstract void writeTo(T unknownFields, Writer writer) throws IOException; |
| |
| abstract void writeAsMessageSetTo(T unknownFields, Writer writer) throws IOException; |
| |
| /** Merges {@code source} into {@code destination} and returns the merged instance. */ |
| abstract T merge(T destination, T source); |
| |
| /** Get the serialized size for message set serialization. */ |
| abstract int getSerializedSizeAsMessageSet(T message); |
| |
| abstract int getSerializedSize(T unknowns); |
| } |