Class ProtoWriter

java.lang.Object

com.codename1.io.grpc.ProtoWriter

public final class ProtoWriter
extends Object

Low-level protobuf wire-format writer used by generated ProtoCodec implementations. Provides per-scalar-type field emitters that skip default values (proto3 default-omission behaviour) so the byte sequence matches what protoc-generated code would emit for the same input.

Wire types (3-bit tag suffix):

Code	Name	Used for
0	VARINT	int32, int64, uint32, uint64, sint*, bool, enum
1	I64	fixed64, sfixed64, double
2	LEN	string, bytes, embedded messages, packed repeated
5	I32	fixed32, sfixed32, float

Field Summary

Fields

Modifier and Type	Field	Description
static final int	WIRE_I32
static final int	WIRE_I64
static final int	WIRE_LEN
static final int	WIRE_VARINT

Constructor Summary

Constructors

Constructor	Description
ProtoWriter(OutputStream out)

Method Summary

Modifier and Type	Method	Description
OutputStream	stream()	Backing stream so generated codecs can stage a sub-message into a ByteArrayOutputStream and length-prefix the result.
void	writeBool(int field, boolean value)
void	writeBytes(int field, byte[] value)
void	writeDouble(int field, double value)
void	writeFixed32(int value)
void	writeFixed32Field(int field, int value)
void	writeFixed64(long value)
void	writeFixed64Field(int field, long value)
void	writeFloat(int field, float value)
void	writeInt32(int field, int value)
void	writeInt64(int field, long value)
<T> void	writeMessage(int field, T value, ProtoCodec<T> codec)	Writes a nested @ProtoMessage value as a length-delimited field.
<T> void	writeMessageList(int field, List<T> values, ProtoCodec<T> codec)	Writes a repeated field of nested messages (one tag + length prefix per element -- proto3 doesn't pack length-delimited repeated entries).
void	writePackedInt32(int field, List<Integer> values)	Writes a packed repeated int32 field (proto3 default packing for scalar lists).
void	writePackedInt64(int field, List<Long> values)	Writes a packed repeated int64 field.
void	writeSInt32(int field, int value)
void	writeSInt64(int field, long value)
void	writeString(int field, String value)
void	writeStringList(int field, List<String> values)	Writes a repeated field of strings (one tag + length prefix per element).
void	writeTag(int fieldNumber, int wireType)
void	writeUInt32(int field, int value)
void	writeUInt64(int field, long value)
void	writeVarint32(int value)
void	writeVarint64(long value)
static int	zigZag32(int n)
static long	zigZag64(long n)

Methods inherited from class Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

WIRE_VARINT

public static final int WIRE_VARINT

See Also:

• Constant Field Values

WIRE_I64

public static final int WIRE_I64

See Also:

• Constant Field Values

WIRE_LEN

public static final int WIRE_LEN

See Also:

• Constant Field Values

WIRE_I32

public static final int WIRE_I32

See Also:

• Constant Field Values

Constructor Details

ProtoWriter

public ProtoWriter(OutputStream out)

Method Details

stream

public OutputStream stream()

Backing stream so generated codecs can stage a sub-message into a ByteArrayOutputStream and length-prefix the result.

writeTag

public void writeTag(int fieldNumber,
 int wireType)
              throws IOException

Throws:

IOException

writeVarint32

public void writeVarint32(int value)
                   throws IOException

Throws:

IOException

writeVarint64

public void writeVarint64(long value)
                   throws IOException

Throws:

IOException

writeFixed32

public void writeFixed32(int value)
                  throws IOException

Throws:

IOException

writeFixed64

public void writeFixed64(long value)
                  throws IOException

Throws:

IOException

zigZag32

public static int zigZag32(int n)

zigZag64

public static long zigZag64(long n)

writeInt32

public void writeInt32(int field,
 int value)
                throws IOException

Throws:

IOException

writeInt64

public void writeInt64(int field,
 long value)
                throws IOException

Throws:

IOException

writeUInt32

public void writeUInt32(int field,
 int value)
                 throws IOException

Throws:

IOException

writeUInt64

public void writeUInt64(int field,
 long value)
                 throws IOException

Throws:

IOException

writeSInt32

public void writeSInt32(int field,
 int value)
                 throws IOException

Throws:

IOException

writeSInt64

public void writeSInt64(int field,
 long value)
                 throws IOException

Throws:

IOException

writeFixed32Field

public void writeFixed32Field(int field,
 int value)
                       throws IOException

Throws:

IOException

writeFixed64Field

public void writeFixed64Field(int field,
 long value)
                       throws IOException

Throws:

IOException

writeBool

public void writeBool(int field,
 boolean value)
               throws IOException

Throws:

IOException

writeFloat

public void writeFloat(int field,
 float value)
                throws IOException

Throws:

IOException

writeDouble

public void writeDouble(int field,
 double value)
                 throws IOException

Throws:

IOException

writeString

public void writeString(int field,
 String value)
                 throws IOException

Throws:

IOException

writeBytes

public void writeBytes(int field,
 byte[] value)
                throws IOException

Throws:

IOException

writeMessage

public <T> void writeMessage(int field,
 T value,
 ProtoCodec<T> codec)
                      throws IOException

Writes a nested @ProtoMessage value as a length-delimited field. Generated codecs call into ProtoCodecs.lookup(Class) to find the nested codec.

Throws:

IOException

writeMessageList

public <T> void writeMessageList(int field,
 List<T> values,
 ProtoCodec<T> codec)
                          throws IOException

Writes a repeated field of nested messages (one tag + length prefix per element -- proto3 doesn't pack length-delimited repeated entries).

Throws:

IOException

writeStringList

public void writeStringList(int field,
 List<String> values)
                     throws IOException

Writes a repeated field of strings (one tag + length prefix per element).

Throws:

IOException

writePackedInt32

public void writePackedInt32(int field,
 List<Integer> values)
                      throws IOException

Writes a packed repeated int32 field (proto3 default packing for scalar lists).

Throws:

IOException

writePackedInt64

public void writePackedInt64(int field,
 List<Long> values)
                      throws IOException

Writes a packed repeated int64 field.

Throws:

IOException