com.dyuproject.protostuff
Class ProtobufOutput

java.lang.Object
  com.dyuproject.protostuff.WriteSession
      com.dyuproject.protostuff.ProtobufOutput

All Implemented Interfaces:

Output

public final class ProtobufOutput
extends WriteSession
implements Output

Protobuf serialization where the messages must be fully buffered on memory before it can be written to the socket (OutputStream).

Author:

David Yu

Date created:

May 18, 2010

Field Summary

static int	LITTLE_ENDIAN_32_SIZE
static int	LITTLE_ENDIAN_64_SIZE

Fields inherited from class com.dyuproject.protostuff.WriteSession

head, nextBufferSize, out, sink, size, tail

Constructor Summary

ProtobufOutput(LinkedBuffer buffer)

ProtobufOutput(LinkedBuffer buffer, int nextBufferSize)

Method Summary

ProtobufOutput	clear() Resets this output for re-use.
static int	computeRawVarint32Size(int value) Compute the number of bytes that would be needed to encode a varint.
static int	computeRawVarint64Size(long value) Compute the number of bytes that would be needed to encode a varint.
static int	encodeZigZag32(int n) Encode a ZigZag-encoded 32-bit value.
static long	encodeZigZag64(long n) Encode a ZigZag-encoded 64-bit value.
static byte[]	getRawVarInt32Bytes(int value) Returns the byte array computed from the var int 32 size
static byte[]	getTagAndRawLittleEndian32Bytes(int tag, int value) Returns a byte array encoded with the tag and little endian 32
static byte[]	getTagAndRawLittleEndian64Bytes(int tag, long value) Returns a byte array encoded with the tag and little endian 64
static byte[]	getTagAndRawVarInt32Bytes(int tag, int value) Returns a byte array encoded with the tag and var int 32
static byte[]	getTagAndRawVarInt64Bytes(int tag, long value) Returns a byte array encoded with the tag and var int 64
void	writeBool(int fieldNumber, boolean value, boolean repeated)
void	writeByteArray(int fieldNumber, byte[] bytes, boolean repeated)
void	writeByteRange(boolean utf8String, int fieldNumber, byte[] value, int offset, int length, boolean repeated)
void	writeBytes(int fieldNumber, ByteString value, boolean repeated)
void	writeDouble(int fieldNumber, double value, boolean repeated)
void	writeEnum(int fieldNumber, int number, boolean repeated)
void	writeFixed32(int fieldNumber, int value, boolean repeated)
void	writeFixed64(int fieldNumber, long value, boolean repeated)
void	writeFloat(int fieldNumber, float value, boolean repeated)
void	writeInt32(int fieldNumber, int value, boolean repeated)
void	writeInt64(int fieldNumber, long value, boolean repeated)
<T> void	writeObject(int fieldNumber, T value, Schema<T> schema, boolean repeated)
static int	writeRawLittleEndian32(int value, byte[] buffer, int offset) Writes the encoded little endian 32 and returns the bytes written
static int	writeRawLittleEndian64(long value, byte[] buffer, int offset) Writes the encoded little endian 64 and returns the bytes written
static void	writeRawVarInt32(int value, byte[] buf, int offset) Encode and write a varint to the byte array
static LinkedBuffer	writeRawVarInt32(int value, WriteSession session, LinkedBuffer lb) Returns the buffer encoded with the variable int 32.
static void	writeRawVarInt32Bytes(java.io.DataOutput out, int value) Encode and write a varint to the DataOutput
static void	writeRawVarInt32Bytes(java.io.OutputStream out, int value) Encode and write a varint to the OutputStream
void	writeSFixed32(int fieldNumber, int value, boolean repeated)
void	writeSFixed64(int fieldNumber, long value, boolean repeated)
void	writeSInt32(int fieldNumber, int value, boolean repeated)
void	writeSInt64(int fieldNumber, long value, boolean repeated)
void	writeString(int fieldNumber, java.lang.String value, boolean repeated)
static LinkedBuffer	writeTagAndByteArray(int tag, byte[] value, int offset, int valueLen, WriteSession session, LinkedBuffer lb) Returns the buffer encoded with the tag and byte array
static LinkedBuffer	writeTagAndLinkedBuffer(int tag, LinkedBuffer buffer, WriteSession session, LinkedBuffer lb) Returns the buffer encoded with the tag and LinkedBuffer (zero-copy)
static LinkedBuffer	writeTagAndRawLittleEndian32(int tag, int value, WriteSession session, LinkedBuffer lb) Returns the buffer encoded with the tag and little endian 32
static LinkedBuffer	writeTagAndRawLittleEndian64(int tag, long value, WriteSession session, LinkedBuffer lb) Returns the buffer encoded with the tag and little endian 64
static LinkedBuffer	writeTagAndRawVarInt32(int tag, int value, WriteSession session, LinkedBuffer lb) Returns the buffer encoded with the tag and var int 32
static LinkedBuffer	writeTagAndRawVarInt64(int tag, long value, WriteSession session, LinkedBuffer lb) Returns the buffer encoded with the tag and var int 64
void	writeUInt32(int fieldNumber, int value, boolean repeated)
void	writeUInt64(int fieldNumber, long value, boolean repeated)

Methods inherited from class com.dyuproject.protostuff.WriteSession

getSize, toByteArray

Methods inherited from class java.lang.Object

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

Field Detail

LITTLE_ENDIAN_32_SIZE

public static final int LITTLE_ENDIAN_32_SIZE

See Also:

Constant Field Values

LITTLE_ENDIAN_64_SIZE

public static final int LITTLE_ENDIAN_64_SIZE

See Also:

Constant Field Values

Constructor Detail

ProtobufOutput

public ProtobufOutput(LinkedBuffer buffer)

ProtobufOutput

public ProtobufOutput(LinkedBuffer buffer,
                      int nextBufferSize)

Method Detail

clear

public ProtobufOutput clear()

Resets this output for re-use.

Overrides:

clear in class WriteSession

writeInt32

public void writeInt32(int fieldNumber,
                       int value,
                       boolean repeated)
                throws java.io.IOException

Specified by:

writeInt32 in interface Output

Throws:

java.io.IOException

writeUInt32

public void writeUInt32(int fieldNumber,
                        int value,
                        boolean repeated)
                 throws java.io.IOException

Specified by:

writeUInt32 in interface Output

Throws:

java.io.IOException

writeSInt32

public void writeSInt32(int fieldNumber,
                        int value,
                        boolean repeated)
                 throws java.io.IOException

Specified by:

writeSInt32 in interface Output

Throws:

java.io.IOException

writeFixed32

public void writeFixed32(int fieldNumber,
                         int value,
                         boolean repeated)
                  throws java.io.IOException

Specified by:

writeFixed32 in interface Output

Throws:

java.io.IOException

writeSFixed32

public void writeSFixed32(int fieldNumber,
                          int value,
                          boolean repeated)
                   throws java.io.IOException

Specified by:

writeSFixed32 in interface Output

Throws:

java.io.IOException

writeInt64

public void writeInt64(int fieldNumber,
                       long value,
                       boolean repeated)
                throws java.io.IOException

Specified by:

writeInt64 in interface Output

Throws:

java.io.IOException

writeUInt64

public void writeUInt64(int fieldNumber,
                        long value,
                        boolean repeated)
                 throws java.io.IOException

Specified by:

writeUInt64 in interface Output

Throws:

java.io.IOException

writeSInt64

public void writeSInt64(int fieldNumber,
                        long value,
                        boolean repeated)
                 throws java.io.IOException

Specified by:

writeSInt64 in interface Output

Throws:

java.io.IOException

writeFixed64

public void writeFixed64(int fieldNumber,
                         long value,
                         boolean repeated)
                  throws java.io.IOException

Specified by:

writeFixed64 in interface Output

Throws:

java.io.IOException

writeSFixed64

public void writeSFixed64(int fieldNumber,
                          long value,
                          boolean repeated)
                   throws java.io.IOException

Specified by:

writeSFixed64 in interface Output

Throws:

java.io.IOException

writeFloat

public void writeFloat(int fieldNumber,
                       float value,
                       boolean repeated)
                throws java.io.IOException

Specified by:

writeFloat in interface Output

Throws:

java.io.IOException

writeDouble

public void writeDouble(int fieldNumber,
                        double value,
                        boolean repeated)
                 throws java.io.IOException

Specified by:

writeDouble in interface Output

Throws:

java.io.IOException

writeBool

public void writeBool(int fieldNumber,
                      boolean value,
                      boolean repeated)
               throws java.io.IOException

Specified by:

writeBool in interface Output

Throws:

java.io.IOException

writeEnum

public void writeEnum(int fieldNumber,
                      int number,
                      boolean repeated)
               throws java.io.IOException

Specified by:

writeEnum in interface Output

Throws:

java.io.IOException

writeString

public void writeString(int fieldNumber,
                        java.lang.String value,
                        boolean repeated)
                 throws java.io.IOException

Specified by:

writeString in interface Output

Throws:

java.io.IOException

writeBytes

public void writeBytes(int fieldNumber,
                       ByteString value,
                       boolean repeated)
                throws java.io.IOException

Specified by:

writeBytes in interface Output

Throws:

java.io.IOException

writeByteArray

public void writeByteArray(int fieldNumber,
                           byte[] bytes,
                           boolean repeated)
                    throws java.io.IOException

Specified by:

writeByteArray in interface Output

Throws:

java.io.IOException

writeByteRange

public void writeByteRange(boolean utf8String,
                           int fieldNumber,
                           byte[] value,
                           int offset,
                           int length,
                           boolean repeated)
                    throws java.io.IOException

Specified by:

writeByteRange in interface Output

Throws:

java.io.IOException

writeObject

public <T> void writeObject(int fieldNumber,
                            T value,
                            Schema<T> schema,
                            boolean repeated)
                 throws java.io.IOException

Specified by:

writeObject in interface Output

Throws:

java.io.IOException

writeRawVarInt32

public static LinkedBuffer writeRawVarInt32(int value,
                                            WriteSession session,
                                            LinkedBuffer lb)

Returns the buffer encoded with the variable int 32.

writeTagAndLinkedBuffer

public static LinkedBuffer writeTagAndLinkedBuffer(int tag,
                                                   LinkedBuffer buffer,
                                                   WriteSession session,
                                                   LinkedBuffer lb)

Returns the buffer encoded with the tag and LinkedBuffer (zero-copy)

writeTagAndByteArray

public static LinkedBuffer writeTagAndByteArray(int tag,
                                                byte[] value,
                                                int offset,
                                                int valueLen,
                                                WriteSession session,
                                                LinkedBuffer lb)

Returns the buffer encoded with the tag and byte array

writeTagAndRawVarInt32

public static LinkedBuffer writeTagAndRawVarInt32(int tag,
                                                  int value,
                                                  WriteSession session,
                                                  LinkedBuffer lb)

Returns the buffer encoded with the tag and var int 32

writeTagAndRawVarInt64

public static LinkedBuffer writeTagAndRawVarInt64(int tag,
                                                  long value,
                                                  WriteSession session,
                                                  LinkedBuffer lb)

Returns the buffer encoded with the tag and var int 64

writeTagAndRawLittleEndian32

public static LinkedBuffer writeTagAndRawLittleEndian32(int tag,
                                                        int value,
                                                        WriteSession session,
                                                        LinkedBuffer lb)

Returns the buffer encoded with the tag and little endian 32

writeTagAndRawLittleEndian64

public static LinkedBuffer writeTagAndRawLittleEndian64(int tag,
                                                        long value,
                                                        WriteSession session,
                                                        LinkedBuffer lb)

Returns the buffer encoded with the tag and little endian 64

writeRawVarInt32

public static void writeRawVarInt32(int value,
                                    byte[] buf,
                                    int offset)
                             throws java.io.IOException

Encode and write a varint to the byte array

Throws:

java.io.IOException

writeRawVarInt32Bytes

public static void writeRawVarInt32Bytes(java.io.OutputStream out,
                                         int value)
                                  throws java.io.IOException

Encode and write a varint to the OutputStream

Throws:

java.io.IOException

writeRawVarInt32Bytes

public static void writeRawVarInt32Bytes(java.io.DataOutput out,
                                         int value)
                                  throws java.io.IOException

Encode and write a varint to the DataOutput

Throws:

java.io.IOException

getTagAndRawVarInt32Bytes

public static byte[] getTagAndRawVarInt32Bytes(int tag,
                                               int value)

Returns a byte array encoded with the tag and var int 32

getTagAndRawVarInt64Bytes

public static byte[] getTagAndRawVarInt64Bytes(int tag,
                                               long value)

Returns a byte array encoded with the tag and var int 64

getTagAndRawLittleEndian32Bytes

public static byte[] getTagAndRawLittleEndian32Bytes(int tag,
                                                     int value)

Returns a byte array encoded with the tag and little endian 32

getTagAndRawLittleEndian64Bytes

public static byte[] getTagAndRawLittleEndian64Bytes(int tag,
                                                     long value)

Returns a byte array encoded with the tag and little endian 64

writeRawLittleEndian32

public static int writeRawLittleEndian32(int value,
                                         byte[] buffer,
                                         int offset)

Writes the encoded little endian 32 and returns the bytes written

writeRawLittleEndian64

public static int writeRawLittleEndian64(long value,
                                         byte[] buffer,
                                         int offset)

Writes the encoded little endian 64 and returns the bytes written

getRawVarInt32Bytes

public static byte[] getRawVarInt32Bytes(int value)

Returns the byte array computed from the var int 32 size

computeRawVarint32Size

public static int computeRawVarint32Size(int value)

Compute the number of bytes that would be needed to encode a varint. value is treated as unsigned, so it won't be sign-extended if negative.

computeRawVarint64Size

public static int computeRawVarint64Size(long value)

Compute the number of bytes that would be needed to encode a varint.

encodeZigZag32

public static int encodeZigZag32(int n)

Encode a ZigZag-encoded 32-bit value. ZigZag encodes signed integers into values that can be efficiently encoded with varint. (Otherwise, negative values must be sign-extended to 64 bits to be varint encoded, thus always taking 10 bytes on the wire.)

Parameters:

n - A signed 32-bit integer.

Returns:

An unsigned 32-bit integer, stored in a signed int because Java has no explicit unsigned support.

encodeZigZag64

public static long encodeZigZag64(long n)

Encode a ZigZag-encoded 64-bit value. ZigZag encodes signed integers into values that can be efficiently encoded with varint. (Otherwise, negative values must be sign-extended to 64 bits to be varint encoded, thus always taking 10 bytes on the wire.)

Parameters:

n - A signed 64-bit integer.

Returns:

An unsigned 64-bit integer, stored in a signed int because Java has no explicit unsigned support.