net.openhft.lang.io

Interface RandomDataOutput

All Superinterfaces:

AutoCloseable, BytesCommon, DataOutput, ObjectOutput, RandomAccess

All Known Subinterfaces:

Bytes, IByteBufferBytes

All Known Implementing Classes:

AbstractBytes, BoundsCheckingDirectBytes, BoundsCheckingNativeBytes, ByteBufferBytes, CheckedBytes, DirectByteBufferBytes, DirectBytes, MappedNativeBytes, MultiStoreBytes, NativeBytes, VanillaMappedBytes, WrappedBytes

public interface RandomDataOutput
extends ObjectOutput, RandomAccess, BytesCommon

Author:

peter.lawrey

Method Summary

Methods

Modifier and Type	Method and Description
int	addAndGetInt(long offset, int delta) Atomically adds the given value to the current value.
void	close() The same as calling finish();
boolean	compareAndSwapDouble(long offset, double expected, double x) Perform a compare and set operation.
boolean	compareAndSwapInt(long offset, int expected, int x) Perform a compare and set operation.
boolean	compareAndSwapLong(long offset, long expected, long x) Perform a compare and set operation.
void	flush() Check the end of the stream has not overflowed.
int	getAndAdd(long offset, int delta) Atomically adds the given value to the current value.
void	write(byte[] bytes) Writes to the output stream all the bytes in array bytes.
void	write(byte[] bytes, int off, int len) Writes len bytes from array bytes, in order, to the output stream.
void	write(Byteable byteable) Copies the contents of a Byteable from the offset for maxSize bytes, moves the position of "this" RandomDataOutput by the maxSize
void	write(ByteBuffer bb) Copies the contents of a ByteBuffer from the position to the limit.
void	write(char[] data)
void	write(char[] data, int off, int len)
void	write(int b) Writes to the output stream the eight low-order bits of the argument b.
void	write(long offset, byte[] bytes) Writes to the output stream all the bytes in array bytes.
void	write(long offset, byte[] bytes, int off, int len)
void	write(long offset, Bytes bytes)
void	write(RandomDataInput bytes) Copies the contents of a RandomDataInput from the position to the limit.
void	write(RandomDataInput bytes, long position, long length) Copy from one Bytes to another, moves the position of "this" RandomDataOutput by the length.
void	write8bitText(CharSequence s)
void	writeBoolean(boolean v) Writes a boolean value to this output stream.
void	writeBoolean(long offset, boolean v) Writes a boolean value to this output stream.
void	writeByte(int v) Writes to the output stream the eight low- order bits of the argument v.
void	writeByte(long offset, int b) Writes to the output stream the eight low-order bits of the argument b.
void	writeBytes(String s) Writes a string to the output stream.
void	writeChar(int v) Writes a char value, which is comprised of two bytes, to the output stream.
void	writeChar(long offset, int v) Writes a char value, which is comprised of two bytes, to the output stream.
void	writeChars(CharSequence cs) Writes chars of the given CharSequence to the bytes, without encoding.
void	writeChars(String s) Writes every character in the string s, to the output stream, in order, two bytes per character.
void	writeCompactDouble(double v) Writes four or twelve bytes as follow;
void	writeCompactInt(int v) Writes two or six bytes as follows; Integer.MIN_VALUE => Short.MIN_VALUE, Integer.MAX_VALUE => Short.MAX_VALUE, Short.MIN_VALUE+2 to Short.MAX_VALUE-1 => writeShort(x), default => writeShort(Short.MIN_VALUE+1; writeInt(x)
void	writeCompactLong(long v) Writes four or twelve bytes as follows Long.MIN_VALUE => Integer.MIN_VALUE, Long.MAX_VALUE => Integer.MAX_VALUE, Integer.MIN_VALUE+2 to Integer.MAX_VALUE-1 => writeInt(x), default => writeInt(Integer.MIN_VALUE+1; writeLong(x)
void	writeCompactShort(int v) Writes one or three bytes as follows; Short.MIN_VALUE => Byte.MIN_VALUE, Short.MAX_VALUE => Byte.MAX_VALUE, Short.MIN_VALUE+2 to Short.MAX_VALUE-1 => writeByte(x), default => writeByte(Byte.MIN_VALUE+1; writeShort(x)
void	writeCompactUnsignedInt(long v) Writes two or six bytes as follows; 0 to (1 << 16) - 2 => writeInt(x), otherwise writeShort(-1); writeInt(x)
void	writeCompactUnsignedShort(int v) Writes one or three bytes as follows; 0 to 254 => writeByte(x); otherwise writeByte(255); writeByteShort(x);
void	writeDouble(double v) Writes a double value, which is comprised of eight bytes, to the output stream.
void	writeDouble(long offset, double v) Writes a double value, which is comprised of eight bytes, to the output stream.
<E> void	writeEnum(E e) Write the object in a form which can be uniquely recreated by readEnum.
void	writeFloat(float v) Writes a float value, which is comprised of four bytes, to the output stream.
void	writeFloat(long offset, float v) Writes a float value, which is comprised of four bytes, to the output stream.
<OBJ> void	writeInstance(Class<OBJ> objClass, OBJ obj) Write an object with the assumption that the objClass will be provided when the class is read.
void	writeInt(int v) Writes an int value, which is comprised of four bytes, to the output stream.
void	writeInt(long offset, int v) Writes an int value, which is comprised of four bytes, to the output stream.
void	writeInt24(int v) Writes an int value, which is comprised of three bytes, to the output stream.
void	writeInt24(long offset, int v) Writes an int value, which is comprised of three bytes, to the output stream.
void	writeInt48(long v) Writes a long value, which is comprised of eight bytes, to the output stream.
void	writeInt48(long offset, long v) Writes a long value, which is comprised of eight bytes, to the output stream.
<E> void	writeList(Collection<E> list) Write an ordered collection of "enumerable objects" (See writeEnum).
void	writeLong(long v) Writes a long value, which is comprised of eight bytes, to the output stream.
void	writeLong(long offset, long v) Writes a long value, which is comprised of eight bytes, to the output stream.
<K,V> void	writeMap(Map<K,V> map) Write the keys and values of a Map of "enumerable objects" (See writeEnum).
void	writeObject(Object object) Write an object as either an "enumerable object" or a Serializable/Externalizable object using Java Serialization.
void	writeObject(Object object, int start, int end) Copy data from an Object from bytes start to end.
void	writeOrderedDouble(long offset, double v) Same as writeDouble but include an ordered write barrier.
void	writeOrderedFloat(long offset, float v) Same as writeFloat but include an ordered write barrier.
void	writeOrderedInt(int v) Same as writeInt but include an ordered write barrier.
void	writeOrderedInt(long offset, int v) Same as writeInt but include an ordered write barrier.
void	writeOrderedLong(long v) Same as writeLong but include an ordered write barrier.
void	writeOrderedLong(long offset, long v) Same as writeLong but include an ordered write barrier.
void	writeShort(int v) Writes two bytes to the output stream to represent the value of the argument.
void	writeShort(long offset, int v) Writes two bytes to the output stream to represent the value of the argument.
void	writeStopBit(long n) Stop bit encoding numbers.
void	writeUnsignedByte(int v) Writes to the output stream the eight low- order bits of the argument v.
void	writeUnsignedByte(long offset, int v) Writes to the output stream the eight low- order bits of the argument v.
void	writeUnsignedInt(long v) Writes an int value, which is comprised of four bytes, to the output stream.
void	writeUnsignedInt(long offset, long v) Writes an int value, which is comprised of four bytes, to the output stream.
void	writeUnsignedShort(int v) Writes two bytes to the output stream to represent the value of the argument.
void	writeUnsignedShort(long offset, int v) Writes two bytes to the output stream to represent the value of the argument.
void	writeUTF(String s) Writes two bytes of length information to the output stream, followed by the modified UTF-8 representation of every character in the string s.
void	writeUTFΔ(CharSequence s) Write the same encoding as writeUTF with the following changes.
void	writeUTFΔ(long offset, int maxSize, CharSequence s) Write the same encoding as writeUTF with the following changes.
Bytes	zeroOut() fill the Bytes with zeros, and clear the position.
Bytes	zeroOut(long start, long end) fill the Bytes with zeros.
Bytes	zeroOut(long start, long end, boolean ifNotZero) fill the Bytes with zeros, and clear the position, avoiding touching pages unnecessarily

Methods inherited from interface net.openhft.lang.io.BytesCommon

alignPositionAddr, byteOrder, capacity, checkEndOfBuffer, clear, finish, flip, inputStream, isFinished, limit, limit, load, objectSerializer, outputStream, position, position, remaining, slice, slice, sliceAsByteBuffer, toDebugString, toDebugString, toString

Method Detail

write

void write(RandomDataInput bytes)

Copies the contents of a RandomDataInput from the position to the limit.

This method transfers the bytes remaining in the given source buffer into this buffer. If there are more bytes remaining in the source buffer than in this buffer, that is, if src.remaining() > remaining(), then no bytes are transferred and a BufferOverflowException is thrown.

Otherwise, this method copies n = src.remaining() bytes from the given buffer into this buffer, starting at each buffer's current position. The positions of both buffers are then incremented by n.

In other words, an invocation of this method of the form dst.write(src) has exactly the same effect as the loop

     while (src.hasRemaining())
         dst.writeByte(src.readByte()); 
  

Parameters:

bytes - to copy

write

void write(RandomDataInput bytes,
         long position,
         long length)

Copy from one Bytes to another, moves the position of "this" RandomDataOutput by the length. The position of the RandomDataInput is not used or altered.

Parameters:

bytes - to copy

position - to copy from

length - to copy

write

void write(@NotNull
         Byteable byteable)

Copies the contents of a Byteable from the offset for maxSize bytes, moves the position of "this" RandomDataOutput by the maxSize

Parameters:

byteable - to copy

write

void write(int b)

Writes to the output stream the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

Specified by:

write in interface DataOutput

Specified by:

write in interface ObjectOutput

Parameters:

b - the byte to be written.

writeByte

void writeByte(int v)

Writes to the output stream the eight low- order bits of the argument v. The 24 high-order bits of v are ignored. (This means that writeByte does exactly the same thing as write for an integer argument.) The byte written by this method may be read by the readByte method of interface DataInput, which will then return a byte equal to (byte)v.

Specified by:

writeByte in interface DataOutput

Parameters:

v - the byte value to be written.

writeUnsignedByte

void writeUnsignedByte(int v)

Writes to the output stream the eight low- order bits of the argument v. The 24 high-order bits of v are ignored. (This means that writeByte does exactly the same thing as write for an integer argument.) The byte written by this method may be read by the readUnsignedByte method of interface DataInput, which will then return a byte equal to (byte)v.

Parameters:

v - the byte value to be written.

writeByte

void writeByte(long offset,
             int b)

Writes to the output stream the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

Parameters:

offset - to write byte

b - the byte to be written.

writeUnsignedByte

void writeUnsignedByte(long offset,
                     int v)

Writes to the output stream the eight low- order bits of the argument v. The 24 high-order bits of v are ignored. (This means that writeByte does exactly the same thing as write for an integer argument.) The byte written by this method may be read by the readUnsignedByte method of interface DataInput, which will then return a byte equal to v & 0xFF.

Parameters:

offset - to write byte

v - the unsigned byte value to be written.

write

void write(byte[] bytes)

Writes to the output stream all the bytes in array bytes. If bytes is null, a NullPointerException is thrown. If bytes.length is zero, then no bytes are written. Otherwise, the byte bytes[0] is written first, then bytes[1], and so on; the last byte written is bytes[bytes.length-1].

Specified by:

write in interface DataOutput

Specified by:

write in interface ObjectOutput

Parameters:

bytes - the data.

write

void write(long offset,
         byte[] bytes)

Writes to the output stream all the bytes in array bytes. If bytes is null, a NullPointerException is thrown. If bytes.length is zero, then no bytes are written. Otherwise, the byte bytes[0] is written first, then bytes[1], and so on; the last byte written is bytes[bytes.length-1].

Parameters:

offset - to be written

bytes - the data.

write

void write(long offset,
         Bytes bytes)

write

void write(byte[] bytes,
         int off,
         int len)

Writes len bytes from array bytes, in order, to the output stream. If bytes is null, a NullPointerException is thrown. If off is negative, or len is negative, or off+len is greater than the length of the array bytes, then an IndexOutOfBoundsException is thrown. If len is zero, then no bytes are written. Otherwise, the byte bytes[off] is written first, then bytes[off+1], and so on; the last byte written is bytes[off+len-1].

Specified by:

write in interface DataOutput

Specified by:

write in interface ObjectOutput

Parameters:

bytes - the data.

off - the start offset in the data.

len - the number of bytes to write.

write

void write(long offset,
         byte[] bytes,
         int off,
         int len)

write

void write(@NotNull
         char[] data)

write

void write(@NotNull
         char[] data,
         int off,
         int len)

writeBoolean

void writeBoolean(boolean v)

Writes a boolean value to this output stream. If the argument v is true, the value (byte)1 is written; if v is false, the value (byte)0 is written. The byte written by this method may be read by the readBoolean method of interface DataInput, which will then return a boolean equal to v.

Specified by:

writeBoolean in interface DataOutput

Parameters:

v - the boolean to be written.

writeBoolean

void writeBoolean(long offset,
                boolean v)

Writes a boolean value to this output stream. If the argument v is true, the value (byte)1 is written; if v is false, the value (byte)0 is written. The byte written by this method may be read by the readBoolean method of interface DataInput, which will then return a boolean equal to v.

Parameters:

offset - to write boolean

v - the boolean to be written.

writeShort

void writeShort(int v)

Writes two bytes to the output stream to represent the value of the argument. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 8))
 (byte)(0xff & v)
  

The bytes written by this method may be read by the readShort method of interface DataInput , which will then return a short equal to (short)v.

Specified by:

writeShort in interface DataOutput

Parameters:

v - the short value to be written.

writeShort

void writeShort(long offset,
              int v)

Writes two bytes to the output stream to represent the value of the argument. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 8))
 (byte)(0xff & v)
  

The bytes written by this method may be read by the readShort method of interface DataInput , which will then return a short equal to (short)v.

Parameters:

offset - to be written to

v - the short value to be written.

writeUnsignedShort

void writeUnsignedShort(int v)

Writes two bytes to the output stream to represent the value of the argument. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 8))
 (byte)(0xff & v)
  

The bytes written by this method may be read by the readUnsignedShort method of interface RandomDataInput , which will then return a short equal to (short)v.

Parameters:

v - the unsigned short value to be written.

writeUnsignedShort

void writeUnsignedShort(long offset,
                      int v)

Writes two bytes to the output stream to represent the value of the argument. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 8))
 (byte)(0xff & v)
  

The bytes written by this method may be read by the readShort method of interface RandomDataInput , which will then return a short equal to (short)v.

Parameters:

offset - to be written to

v - the unsigned short value to be written.

writeCompactShort

void writeCompactShort(int v)

Writes one or three bytes as follows; Short.MIN_VALUE => Byte.MIN_VALUE, Short.MAX_VALUE => Byte.MAX_VALUE, Short.MIN_VALUE+2 to Short.MAX_VALUE-1 => writeByte(x), default => writeByte(Byte.MIN_VALUE+1; writeShort(x)

The bytes written by this method may be read by the readCompactShort method of interface RandomDataInput , which will then return a short equal to (short)v.

Parameters:

v - the short value to be written.

writeCompactUnsignedShort

void writeCompactUnsignedShort(int v)

Writes one or three bytes as follows; 0 to 254 => writeByte(x); otherwise writeByte(255); writeByteShort(x);

The bytes written by this method may be read by the readCompactUnsignedShort method of interface RandomDataInput , which will then return a short equal to v & 0xFFFF.

Parameters:

v - the unsigned short value to be written.

writeChar

void writeChar(int v)

Writes a char value, which is comprised of two bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readChar method of interface DataInput , which will then return a char equal to (char)v.

Specified by:

writeChar in interface DataOutput

Parameters:

v - the char value to be written.

writeChar

void writeChar(long offset,
             int v)

Writes a char value, which is comprised of two bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readChar method of interface DataInput , which will then return a char equal to (char)v.

Parameters:

offset - to be written to

v - the char value to be written.

writeInt24

void writeInt24(int v)

Writes an int value, which is comprised of three bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>    8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readInt24 method of interface RandomDataInput , which will then return an int equal to v.

Parameters:

v - the int value to be written.

writeInt24

void writeInt24(long offset,
              int v)

Writes an int value, which is comprised of three bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>    8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readInt24 method of interface RandomDataInput , which will then return an int equal to v.

Parameters:

offset - to be written to

v - the int value to be written.

writeInt

void writeInt(int v)

Writes an int value, which is comprised of four bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>    8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readInt method of interface DataInput , which will then return an int equal to v.

Specified by:

writeInt in interface DataOutput

Parameters:

v - the int value to be written.

writeInt

void writeInt(long offset,
            int v)

Writes an int value, which is comprised of four bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>    8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readInt method of interface DataInput , which will then return an int equal to v.

Parameters:

offset - to be written to

v - the int value to be written.

writeUnsignedInt

void writeUnsignedInt(long v)

Writes an int value, which is comprised of four bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>    8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readUnsignedInt method of interface RandomDataInput , which will then return an long equal to v & 0xFFFFFFFF.

Parameters:

v - the int value to be written.

writeUnsignedInt

void writeUnsignedInt(long offset,
                    long v)

Writes an int value, which is comprised of four bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>    8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readUnsignedInt method of interface RandomDataInput , which will then return an long equal to v & 0xFFFFFFFF.

Parameters:

offset - to be written to

v - the int value to be written.

writeCompactInt

void writeCompactInt(int v)

Writes two or six bytes as follows; Integer.MIN_VALUE => Short.MIN_VALUE, Integer.MAX_VALUE => Short.MAX_VALUE, Short.MIN_VALUE+2 to Short.MAX_VALUE-1 => writeShort(x), default => writeShort(Short.MIN_VALUE+1; writeInt(x)

The bytes written by this method may be read by the readCompactInt method of interface RandomDataInput , which will then return a int equal to v.

Parameters:

v - the int value to be written.

writeCompactUnsignedInt

void writeCompactUnsignedInt(long v)

Writes two or six bytes as follows; 0 to (1 << 16) - 2 => writeInt(x), otherwise writeShort(-1); writeInt(x)

The bytes written by this method may be read by the readCompactUnsignedInt method of interface RandomDataInput , which will then return a int equal to v & 0xFFFFFFFF.

Parameters:

v - the short value to be written.

writeOrderedInt

void writeOrderedInt(int v)

Same as writeInt but include an ordered write barrier. This means all writes will be visible on a read barrier if this write is visible. This might not be visible to be same thread for some clock cycles so an immediate read could see an old value

This is much faster than a volatile write which stalls the pipeline. The data is visible to other threads at the same time.

Parameters:

v - value to write

writeOrderedInt

void writeOrderedInt(long offset,
                   int v)

Same as writeInt but include an ordered write barrier. This means all writes will be visible on a read barrier if this write is visible. This might not be visible to be same thread for some clock cycles so an immediate read could see an old value

This is much faster than writeVolatileInt as the volatile write stalls the pipeline. The data is visible to other threads at the same time.

Parameters:

offset - to write to

v - value to write

compareAndSwapInt

boolean compareAndSwapInt(long offset,
                        int expected,
                        int x)

Perform a compare and set operation. The value is set to x provided the expected value is set already. This operation is atomic.

Parameters:

offset - to write to.

expected - to expect

x - to set if expected was found

Returns:

true if set, false if the value was not expected

getAndAdd

int getAndAdd(long offset,
            int delta)

Atomically adds the given value to the current value.

Parameters:

offset - of the int value to use.

delta - the value to add

Returns:

the previous value

addAndGetInt

int addAndGetInt(long offset,
               int delta)

Atomically adds the given value to the current value.

Parameters:

offset - of the int value to use.

delta - the value to add

Returns:

the updated value

writeInt48

void writeInt48(long v)

Writes a long value, which is comprised of eight bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 40))
 (byte)(0xff & (v >> 32))
 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>  8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readInt48 method of interface RandomDataInput , which will then return a long equal to v & ((1L << 48) - 1).

Parameters:

v - the long value to be written.

writeInt48

void writeInt48(long offset,
              long v)

Writes a long value, which is comprised of eight bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 40))
 (byte)(0xff & (v >> 32))
 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>  8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readInt48 method of interface RandomDataInput , which will then return a long equal to v & ((1L << 48) - 1).

Parameters:

offset - to be written to

v - the long value to be written.

writeLong

void writeLong(long v)

Writes a long value, which is comprised of eight bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 56))
 (byte)(0xff & (v >> 48))
 (byte)(0xff & (v >> 40))
 (byte)(0xff & (v >> 32))
 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>  8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readLong method of interface DataInput , which will then return a long equal to v.

Specified by:

writeLong in interface DataOutput

Parameters:

v - the long value to be written.

writeLong

void writeLong(long offset,
             long v)

Writes a long value, which is comprised of eight bytes, to the output stream. The byte values to be written, in the order shown for big endian machines and the opposite for little endian, are:

 (byte)(0xff & (v >> 56))
 (byte)(0xff & (v >> 48))
 (byte)(0xff & (v >> 40))
 (byte)(0xff & (v >> 32))
 (byte)(0xff & (v >> 24))
 (byte)(0xff & (v >> 16))
 (byte)(0xff & (v >>  8))
 (byte)(0xff & v)
 

The bytes written by this method may be read by the readLong method of interface DataInput , which will then return a long equal to v.

Parameters:

offset - to be written to

v - the long value to be written.

writeCompactLong

void writeCompactLong(long v)

Writes four or twelve bytes as follows Long.MIN_VALUE => Integer.MIN_VALUE, Long.MAX_VALUE => Integer.MAX_VALUE, Integer.MIN_VALUE+2 to Integer.MAX_VALUE-1 => writeInt(x), default => writeInt(Integer.MIN_VALUE+1; writeLong(x)

The bytes written by this method may be read by the readCompactLong method of interface RandomDataInput , which will then return a long equal to v.

Parameters:

v - the long value to be written.

writeOrderedLong

void writeOrderedLong(long v)

Same as writeLong but include an ordered write barrier. This means all writes will be visible on a read barrier if this write is visible. This might not be visible to be same thread for some clock cycles so an immediate read could see an old value

This is much faster than a volatile write which stalls the pipeline. The data is visible to other threads at the same time.

Parameters:

v - value to write

writeOrderedLong

void writeOrderedLong(long offset,
                    long v)

Same as writeLong but include an ordered write barrier. This means all writes will be visible on a read barrier if this write is visible. This might not be visible to be same thread for some clock cycles so an immediate read could see an old value

This is much faster than a volatile write which stalls the pipeline. The data is visible to other threads at the same time.

Parameters:

offset - to be written to

v - value to write

compareAndSwapLong

boolean compareAndSwapLong(long offset,
                         long expected,
                         long x)

Perform a compare and set operation. The value is set to x provided the expected value is set already. This operation is atomic.

Parameters:

offset - to write to.

expected - to expect

x - to set if expected was found

Returns:

true if set, false if the value was not expected

compareAndSwapDouble

boolean compareAndSwapDouble(long offset,
                           double expected,
                           double x)

Perform a compare and set operation. The value is set to x provided the expected value is set already. This operation is atomic.

Parameters:

offset - to write to.

expected - to expect

x - to set if expected was found

Returns:

true if set, false if the value was not expected

writeStopBit

void writeStopBit(long n)

Stop bit encoding numbers. This will write the same number of bytes whether you used a byte, short or int.

Parameters:

n - the number to write

writeFloat

void writeFloat(float v)

Writes a float value, which is comprised of four bytes, to the output stream. It does this as if it first converts this float value to an int in exactly the manner of the Float.floatToIntBits method and then writes the int value in exactly the manner of the writeInt method. The bytes written by this method may be read by the readFloat method of interface DataInput, which will then return a float equal to v.

Specified by:

writeFloat in interface DataOutput

Parameters:

v - the float value to be written.

writeFloat

void writeFloat(long offset,
              float v)

Writes a float value, which is comprised of four bytes, to the output stream. It does this as if it first converts this float value to an int in exactly the manner of the Float.floatToIntBits method and then writes the int value in exactly the manner of the writeInt method. The bytes written by this method may be read by the readFloat method of interface DataInput, which will then return a float equal to v.

Parameters:

offset - to write to

v - the float value to be written.

writeOrderedFloat

void writeOrderedFloat(long offset,
                     float v)

Same as writeFloat but include an ordered write barrier. This means all writes will be visible on a read barrier if this write is visible. This might not be visible to be same thread for some clock cycles so an immediate read could see an old value

This is much faster than a volatile write which stalls the pipeline. The data is visible to other threads at the same time.

Parameters:

offset - to write to

v - value to write

writeDouble

void writeDouble(double v)

Writes a double value, which is comprised of eight bytes, to the output stream. It does this as if it first converts this double value to a long in exactly the manner of the Double.doubleToLongBits method and then writes the long value in exactly the manner of the writeLong method. The bytes written by this method may be read by the readDouble method of interface DataInput, which will then return a double equal to v.

Specified by:

writeDouble in interface DataOutput

Parameters:

v - the double value to be written.

writeDouble

void writeDouble(long offset,
               double v)

Writes a double value, which is comprised of eight bytes, to the output stream. It does this as if it first converts this double value to a long in exactly the manner of the Double.doubleToLongBits method and then writes the long value in exactly the manner of the writeLong method. The bytes written by this method may be read by the readDouble method of interface DataInput, which will then return a double equal to v.

Parameters:

offset - to write to

v - the double value to be written.

writeCompactDouble

void writeCompactDouble(double v)

Writes four or twelve bytes as follow;

 if ((float) d == d) {
     writeFloat((float) d);
 } else {
     writeFloat(Float.NaN);
     writeDouble(d);
 }
 

The bytes written by this method may be read by the readCompactDouble method of interface RandomDataInput , which will then return a double equal to v.

Parameters:

v - the double value to be written.

writeOrderedDouble

void writeOrderedDouble(long offset,
                      double v)

Same as writeDouble but include an ordered write barrier. This means all writes will be visible on a read barrier if this write is visible. This might not be visible to be same thread for some clock cycles so an immediate read could see an old value

This is much faster than a volatile write which stalls the pipeline. The data is visible to other threads at the same time.

Parameters:

offset - to write to

v - value to write

writeBytes

void writeBytes(@NotNull
              String s)

Writes a string to the output stream. For every character in the string s, taken in order, one byte is written to the output stream. If s is null, a NullPointerException is thrown.

If s.length is zero, then no bytes are written. Otherwise, the character s[0] is written first, then s[1], and so on; the last character written is s[s.length-1]. For each character, one byte is written, the low-order byte, in exactly the manner of the writeByte method . The high-order eight bits of each character in the string are ignored.

Specified by:

writeBytes in interface DataOutput

Parameters:

s - the string of bytes to be written. Cannot be null.

writeChars

void writeChars(@NotNull
              String s)

Writes every character in the string s, to the output stream, in order, two bytes per character. If s is null, a NullPointerException is thrown. If s.length is zero, then no characters are written. Otherwise, the character s[0] is written first, then s[1], and so on; the last character written is s[s.length-1]. For each character, two bytes are actually written, high-order byte first, in exactly the manner of the writeChar method.

Specified by:

writeChars in interface DataOutput

Parameters:

s - the string value to be written. Cannot be null.

See Also:

writeChars(CharSequence)

writeChars

void writeChars(@NotNull
              CharSequence cs)

Writes chars of the given CharSequence to the bytes, without encoding.

Parameters:

cs - the CharSequence to be written. Cannot be null.

See Also:

writeChars(String)

writeUTF

void writeUTF(@NotNull
            String s)

Writes two bytes of length information to the output stream, followed by the modified UTF-8 representation of every character in the string s. If s is null, a NullPointerException is thrown. Each character in the string s is converted to a group of one, two, or three bytes, depending on the value of the character.

If a character c is in the range \u0001 through \u007f, it is represented by one byte:

(byte)c 

If a character c is \u0000 or is in the range \u0080 through \u07ff, then it is represented by two bytes, to be written in the order shown:

 (byte)(0xc0 | (0x1f & (c >> 6)))
 (byte)(0x80 | (0x3f & c))
  

If a character c is in the range \u0800 through uffff, then it is represented by three bytes, to be written in the order shown:

 (byte)(0xe0 | (0x0f & (c >> 12)))
 (byte)(0x80 | (0x3f & (c >>  6)))
 (byte)(0x80 | (0x3f & c))
  

First, the total number of bytes needed to represent all the characters of s is calculated. If this number is larger than 65535, then a UTFDataFormatException is thrown. Otherwise, this length is written to the output stream in exactly the manner of the writeShort method; after this, the one-, two-, or three-byte representation of each character in the string s is written.

The bytes written by this method may be read by the readUTF method of interface DataInput , which will then return a String equal to s.

Specified by:

writeUTF in interface DataOutput

Parameters:

s - the string value to be written. Cannot be null

writeUTFΔ

void writeUTFΔ(@Nullable
             CharSequence s)
               throws IllegalArgumentException

Write the same encoding as writeUTF with the following changes. 1) The length is stop bit encoded i.e. one byte longer for short strings, but is not limited in length. 2) The string can be null.

Parameters:

s - the string value to be written. Can be null.

Throws:

IllegalArgumentException - if there is not enough space left

writeUTFΔ

void writeUTFΔ(long offset,
             int maxSize,
             @Nullable
             CharSequence s)
               throws IllegalStateException

Write the same encoding as writeUTF with the following changes. 1) The length is stop bit encoded i.e. one byte longer for short strings, but is not limited in length. 2) The string can be null.

Parameters:

offset - to write to

maxSize - maximum number of bytes to use

s - the string value to be written. Can be null.

Throws:

IllegalStateException - if the size is too large.

write8bitText

void write8bitText(@Nullable
                 CharSequence s)

write

void write(@NotNull
         ByteBuffer bb)

Copies the contents of a ByteBuffer from the position to the limit.

This method transfers the bytes remaining in the given source buffer into this buffer. If there are more bytes remaining in the source buffer than in this buffer, that is, if src.remaining() > remaining(), then no bytes are transferred and a BufferOverflowException is thrown.

Otherwise, this method copies n = src.remaining() bytes from the given buffer into this buffer, starting at each buffer's current position. The positions of both buffers are then incremented by n.

In other words, an invocation of this method of the form dst.write(src) has exactly the same effect as the loop

     while (src.hasRemaining())
         dst.writeByte(src.get()); 
  

Parameters:

bb - to copy.

writeEnum

<E> void writeEnum(@Nullable
                 E e)

Write the object in a form which can be uniquely recreated by readEnum. This type of "enumerable objects" has the following constraints; 1) each object must have a one to one mapping with a toString() representation, 2) be immutable, 3) ideally appears more than once, 4) Must have a constructor which takes a single String or a valueOf(String) method.

Type Parameters:

E - element class

Parameters:

e - to enumerate

writeList

<E> void writeList(@NotNull
                 Collection<E> list)

Write an ordered collection of "enumerable objects" (See writeEnum). This writes the stop bit encoded length, followed by multiple calls to writeEnum All the elements must be of the same type.

This can be read by the readList method of RandomInputStream and the reader must know the type of each element. You can send the class first by using writeEnum of the element class

Type Parameters:

E - the class of the list elements

Parameters:

list - to be written

writeMap

<K,V> void writeMap(@NotNull
                  Map<K,V> map)

Write the keys and values of a Map of "enumerable objects" (See writeEnum). This writes the stop bit encoded length, followed by multiple calls to writeEnum for each key and value. All the keys must be of the same type. All values must be of the same type.

Type Parameters:

K - the class of the map keys

V - the class of the map values

Parameters:

map - to write out

writeObject

void writeObject(@Nullable
               Object object)

Write an object as either an "enumerable object" or a Serializable/Externalizable object using Java Serialization. Java Serialization is much slower but sometimes more convenient than using BytesMarshallable.

Specified by:

writeObject in interface ObjectOutput

Parameters:

object - to write

writeInstance

<OBJ> void writeInstance(@NotNull
                       Class<OBJ> objClass,
                       @NotNull
                       OBJ obj)

Write an object with the assumption that the objClass will be provided when the class is read.

Type Parameters:

OBJ - the class of the object to write

Parameters:

objClass - class to write

obj - to write

writeObject

void writeObject(Object object,
               int start,
               int end)

Copy data from an Object from bytes start to end.

Parameters:

object - to copy from

start - first byte inclusive

end - last byte exclusive.

zeroOut

Bytes zeroOut()

fill the Bytes with zeros, and clear the position.

Returns:

this

zeroOut

Bytes zeroOut(long start,
            long end)

fill the Bytes with zeros.

Parameters:

start - first byte to zero out

end - the first byte after the last to zero out (exclusive bound)

Returns:

this

zeroOut

Bytes zeroOut(long start,
            long end,
            boolean ifNotZero)

fill the Bytes with zeros, and clear the position, avoiding touching pages unnecessarily

Parameters:

start - first byte to zero out

end - the first byte after the last to zero out (exclusive bound)

ifNotZero - only set to zero after checking the value is not zero.

Returns:

this

flush

void flush()

Check the end of the stream has not overflowed. Otherwise this doesn't do anything.

Specified by:

flush in interface ObjectOutput

close

void close()

The same as calling finish();

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ObjectOutput