org.apache.mina.core.buffer
Class AbstractIoBuffer

java.lang.Object
  org.apache.mina.core.buffer.IoBuffer
      org.apache.mina.core.buffer.AbstractIoBuffer

All Implemented Interfaces:

Comparable<IoBuffer>

public abstract class AbstractIoBuffer
extends IoBuffer

A base implementation of IoBuffer. This implementation assumes that IoBuffer.buf() always returns a correct NIO ByteBuffer instance. Most implementations could extend this class and implement their own buffer management mechanism.

Version:

$Rev: 671827 $, $Date: 2008-06-26 10:49:48 +0200 (jeu, 26 jun 2008) $

Author:

The Apache MINA Project (dev@mina.apache.org)

See Also:

IoBufferAllocator

Field Summary

Fields inherited from class org.apache.mina.core.buffer.IoBuffer

EMPTY_BUFFER

Constructor Summary

protected	AbstractIoBuffer(AbstractIoBuffer parent) Creates a new derived buffer.
protected	AbstractIoBuffer(IoBufferAllocator allocator, int initialCapacity) Creates a new parent buffer.

Method Summary

CharBuffer	asCharBuffer()
DoubleBuffer	asDoubleBuffer()
FloatBuffer	asFloatBuffer()
InputStream	asInputStream() Returns an InputStream that reads the data from this buffer.
IntBuffer	asIntBuffer()
LongBuffer	asLongBuffer()
OutputStream	asOutputStream() Returns an OutputStream that appends the data into this buffer.
IoBuffer	asReadOnlyBuffer()
protected abstract IoBuffer	asReadOnlyBuffer0() Implement this method to return the unexpandable read only version of this buffer.
ShortBuffer	asShortBuffer()
protected abstract void	buf(ByteBuffer newBuf) Sets the underlying NIO buffer instance.
int	capacity()
IoBuffer	capacity(int newCapacity) Increases the capacity of this buffer.
IoBuffer	clear()
IoBuffer	compact()
int	compareTo(IoBuffer that)
IoBuffer	duplicate()
protected abstract IoBuffer	duplicate0() Implement this method to return the unexpandable duplicate of this buffer.
boolean	equals(Object o)
IoBuffer	expand(int expectedRemaining) Changes the capacity and limit of this buffer so this buffer get the specified expectedRemaining room from the current position.
IoBuffer	expand(int pos, int expectedRemaining) Changes the capacity and limit of this buffer so this buffer get the specified expectedRemaining room from the specified position.
IoBuffer	fill(byte value, int size) Fills this buffer with the specified value.
IoBuffer	fill(int size) Fills this buffer with NUL (0x00).
IoBuffer	fillAndReset(byte value, int size) Fills this buffer with the specified value.
IoBuffer	fillAndReset(int size) Fills this buffer with NUL (0x00).
IoBuffer	flip()
byte	get()
IoBuffer	get(byte[] dst)
IoBuffer	get(byte[] dst, int offset, int length)
byte	get(int index)
char	getChar()
char	getChar(int index)
double	getDouble()
double	getDouble(int index)
<E extends Enum<E>> E	getEnum(Class<E> enumClass) Reads a byte from the buffer and returns the correlating enum constant defined by the specified enum type.
<E extends Enum<E>> E	getEnum(int index, Class<E> enumClass) Reads a byte from the buffer and returns the correlating enum constant defined by the specified enum type.
<E extends Enum<E>> E	getEnumInt(Class<E> enumClass) Reads an int from the buffer and returns the correlating enum constant defined by the specified enum type.
<E extends Enum<E>> E	getEnumInt(int index, Class<E> enumClass) Reads an int from the buffer and returns the correlating enum constant defined by the specified enum type.
<E extends Enum<E>> EnumSet<E>	getEnumSet(Class<E> enumClass) Reads a byte sized bit vector and converts it to an EnumSet.
<E extends Enum<E>> EnumSet<E>	getEnumSet(int index, Class<E> enumClass) Reads a byte sized bit vector and converts it to an EnumSet.
<E extends Enum<E>> EnumSet<E>	getEnumSetInt(Class<E> enumClass) Reads an int sized bit vector and converts it to an EnumSet.
<E extends Enum<E>> EnumSet<E>	getEnumSetInt(int index, Class<E> enumClass) Reads an int sized bit vector and converts it to an EnumSet.
<E extends Enum<E>> EnumSet<E>	getEnumSetLong(Class<E> enumClass) Reads a long sized bit vector and converts it to an EnumSet.
<E extends Enum<E>> EnumSet<E>	getEnumSetLong(int index, Class<E> enumClass) Reads a long sized bit vector and converts it to an EnumSet.
<E extends Enum<E>> EnumSet<E>	getEnumSetShort(Class<E> enumClass) Reads a short sized bit vector and converts it to an EnumSet.
<E extends Enum<E>> EnumSet<E>	getEnumSetShort(int index, Class<E> enumClass) Reads a short sized bit vector and converts it to an EnumSet.
<E extends Enum<E>> E	getEnumShort(Class<E> enumClass) Reads a short from the buffer and returns the correlating enum constant defined by the specified enum type.
<E extends Enum<E>> E	getEnumShort(int index, Class<E> enumClass) Reads a short from the buffer and returns the correlating enum constant defined by the specified enum type.
float	getFloat()
float	getFloat(int index)
String	getHexDump() Returns hexdump of this buffer.
String	getHexDump(int lengthLimit) Return hexdump of this buffer with limited length.
int	getInt()
int	getInt(int index)
long	getLong()
long	getLong(int index)
int	getMediumInt() Relative get method for reading a medium int value.
int	getMediumInt(int index) Absolute get method for reading a medium int value.
Object	getObject() Reads a Java object from the buffer using the context ClassLoader of the current thread.
Object	getObject(ClassLoader classLoader) Reads a Java object from the buffer using the specified classLoader.
String	getPrefixedString(CharsetDecoder decoder) Reads a string which has a 16-bit length field before the actual encoded string, using the specified decoder and returns it.
String	getPrefixedString(int prefixLength, CharsetDecoder decoder) Reads a string which has a length field before the actual encoded string, using the specified decoder and returns it.
short	getShort()
short	getShort(int index)
IoBuffer	getSlice(int length) TODO document me.
IoBuffer	getSlice(int index, int length) TODO document me.
String	getString(CharsetDecoder decoder) Reads a NUL-terminated string from this buffer using the specified decoder and returns it.
String	getString(int fieldSize, CharsetDecoder decoder) Reads a NUL-terminated string from this buffer using the specified decoder and returns it.
short	getUnsigned() Reads one unsigned byte as a short integer.
short	getUnsigned(int index) Reads one byte as an unsigned short integer.
long	getUnsignedInt() Reads four bytes unsigned integer.
long	getUnsignedInt(int index) Reads four bytes unsigned integer.
int	getUnsignedMediumInt() Relative get method for reading an unsigned medium int value.
int	getUnsignedMediumInt(int index) Absolute get method for reading an unsigned medium int value.
int	getUnsignedShort() Reads two bytes unsigned integer.
int	getUnsignedShort(int index) Reads two bytes unsigned integer.
int	hashCode()
boolean	hasRemaining()
int	indexOf(byte b) Returns the first occurence position of the specified byte from the current position to the current limit.
boolean	isAutoExpand() Returns true if and only if autoExpand is turned on.
boolean	isAutoShrink() Returns true if and only if autoShrink is turned on.
boolean	isDerived() returns true if and only if this buffer is derived from other buffer via IoBuffer.duplicate(), IoBuffer.slice() or IoBuffer.asReadOnlyBuffer().
boolean	isDirect()
boolean	isReadOnly()
int	limit()
IoBuffer	limit(int newLimit)
IoBuffer	mark()
int	markValue() Returns the position of the current mark.
int	minimumCapacity() Returns the minimum capacity of this buffer which is used to determine the new capacity of the buffer shrunk by IoBuffer.compact() and IoBuffer.shrink() operation.
IoBuffer	minimumCapacity(int minimumCapacity) Sets the minimum capacity of this buffer which is used to determine the new capacity of the buffer shrunk by IoBuffer.compact() and IoBuffer.shrink() operation.
ByteOrder	order()
IoBuffer	order(ByteOrder bo)
int	position()
IoBuffer	position(int newPosition)
boolean	prefixedDataAvailable(int prefixLength) Returns true if this buffer contains a data which has a data length as a prefix and the buffer has remaining data as enough as specified in the data length field.
boolean	prefixedDataAvailable(int prefixLength, int maxDataLength) Returns true if this buffer contains a data which has a data length as a prefix and the buffer has remaining data as enough as specified in the data length field.
IoBuffer	put(byte b)
IoBuffer	put(byte[] src)
IoBuffer	put(byte[] src, int offset, int length)
IoBuffer	put(ByteBuffer src) Writes the content of the specified src into this buffer.
IoBuffer	put(int index, byte b)
IoBuffer	put(IoBuffer src) Writes the content of the specified src into this buffer.
IoBuffer	putChar(char value)
IoBuffer	putChar(int index, char value)
IoBuffer	putDouble(double value)
IoBuffer	putDouble(int index, double value)
IoBuffer	putEnum(Enum<?> e) Writes an enum's ordinal value to the buffer as a byte.
IoBuffer	putEnum(int index, Enum<?> e) Writes an enum's ordinal value to the buffer as a byte.
IoBuffer	putEnumInt(Enum<?> e) Writes an enum's ordinal value to the buffer as an integer.
IoBuffer	putEnumInt(int index, Enum<?> e) Writes an enum's ordinal value to the buffer as an integer.
<E extends Enum<E>> IoBuffer	putEnumSet(int index, Set<E> set) Writes the specified Set to the buffer as a byte sized bit vector.
<E extends Enum<E>> IoBuffer	putEnumSet(Set<E> set) Writes the specified Set to the buffer as a byte sized bit vector.
<E extends Enum<E>> IoBuffer	putEnumSetInt(int index, Set<E> set) Writes the specified Set to the buffer as an int sized bit vector.
<E extends Enum<E>> IoBuffer	putEnumSetInt(Set<E> set) Writes the specified Set to the buffer as an int sized bit vector.
<E extends Enum<E>> IoBuffer	putEnumSetLong(int index, Set<E> set) Writes the specified Set to the buffer as a long sized bit vector.
<E extends Enum<E>> IoBuffer	putEnumSetLong(Set<E> set) Writes the specified Set to the buffer as a long sized bit vector.
<E extends Enum<E>> IoBuffer	putEnumSetShort(int index, Set<E> set) Writes the specified Set to the buffer as a short sized bit vector.
<E extends Enum<E>> IoBuffer	putEnumSetShort(Set<E> set) Writes the specified Set to the buffer as a short sized bit vector.
IoBuffer	putEnumShort(Enum<?> e) Writes an enum's ordinal value to the buffer as a short.
IoBuffer	putEnumShort(int index, Enum<?> e) Writes an enum's ordinal value to the buffer as a short.
IoBuffer	putFloat(float value)
IoBuffer	putFloat(int index, float value)
IoBuffer	putInt(int value)
IoBuffer	putInt(int index, int value)
IoBuffer	putLong(int index, long value)
IoBuffer	putLong(long value)
IoBuffer	putMediumInt(int value) Relative put method for writing a medium int value.
IoBuffer	putMediumInt(int index, int value) Absolute put method for writing a medium int value.
IoBuffer	putObject(Object o) Writes the specified Java object to the buffer.
IoBuffer	putPrefixedString(CharSequence in, CharsetEncoder encoder) Writes the content of in into this buffer as a string which has a 16-bit length field before the actual encoded string, using the specified encoder.
IoBuffer	putPrefixedString(CharSequence in, int prefixLength, CharsetEncoder encoder) Writes the content of in into this buffer as a string which has a 16-bit length field before the actual encoded string, using the specified encoder.
IoBuffer	putPrefixedString(CharSequence val, int prefixLength, int padding, byte padValue, CharsetEncoder encoder) Writes the content of in into this buffer as a string which has a 16-bit length field before the actual encoded string, using the specified encoder.
IoBuffer	putPrefixedString(CharSequence in, int prefixLength, int padding, CharsetEncoder encoder) Writes the content of in into this buffer as a string which has a 16-bit length field before the actual encoded string, using the specified encoder.
IoBuffer	putShort(int index, short value)
IoBuffer	putShort(short value)
IoBuffer	putString(CharSequence val, CharsetEncoder encoder) Writes the content of in into this buffer using the specified encoder.
IoBuffer	putString(CharSequence val, int fieldSize, CharsetEncoder encoder) Writes the content of in into this buffer as a NUL-terminated string using the specified encoder.
int	remaining()
IoBuffer	reset()
IoBuffer	rewind()
IoBuffer	setAutoExpand(boolean autoExpand) Turns on or off autoExpand.
IoBuffer	setAutoShrink(boolean autoShrink) Turns on or off autoShrink.
IoBuffer	shrink() Changes the capacity of this buffer so this buffer occupies as less memory as possible while retaining the position, limit and the buffer content between the position and limit.
IoBuffer	skip(int size) Forwards the position of this buffer as the specified size bytes.
IoBuffer	slice()
protected abstract IoBuffer	slice0() Implement this method to return the unexpandable slice of this buffer.
IoBuffer	sweep() Clears this buffer and fills its content with NUL.
IoBuffer	sweep(byte value) double Clears this buffer and fills its content with value.
String	toString()

Methods inherited from class org.apache.mina.core.buffer.IoBuffer

allocate, allocate, array, arrayOffset, buf, free, getAllocator, hasArray, isUseDirectBuffer, normalizeCapacity, setAllocator, setUseDirectBuffer, wrap, wrap, wrap

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AbstractIoBuffer

protected AbstractIoBuffer(IoBufferAllocator allocator,
                           int initialCapacity)

Creates a new parent buffer.

AbstractIoBuffer

protected AbstractIoBuffer(AbstractIoBuffer parent)

Creates a new derived buffer.

Method Detail

isDirect

public final boolean isDirect()

Specified by:

isDirect in class IoBuffer

See Also:

ByteBuffer.isDirect()

isReadOnly

public final boolean isReadOnly()

Specified by:

isReadOnly in class IoBuffer

See Also:

Buffer.isReadOnly()

buf

protected abstract void buf(ByteBuffer newBuf)

Sets the underlying NIO buffer instance.

minimumCapacity

public final int minimumCapacity()

Description copied from class: IoBuffer

Returns the minimum capacity of this buffer which is used to determine the new capacity of the buffer shrunk by IoBuffer.compact() and IoBuffer.shrink() operation. The default value is the initial capacity of the buffer.

Specified by:

minimumCapacity in class IoBuffer

minimumCapacity

public final IoBuffer minimumCapacity(int minimumCapacity)

Description copied from class: IoBuffer

Sets the minimum capacity of this buffer which is used to determine the new capacity of the buffer shrunk by IoBuffer.compact() and IoBuffer.shrink() operation. The default value is the initial capacity of the buffer.

Specified by:

minimumCapacity in class IoBuffer

capacity

public final int capacity()

Specified by:

capacity in class IoBuffer

See Also:

Buffer.capacity()

capacity

public final IoBuffer capacity(int newCapacity)

Description copied from class: IoBuffer

Increases the capacity of this buffer. If the new capacity is less than or equal to the current capacity, this method returns silently. If the new capacity is greater than the current capacity, the buffer is reallocated while retaining the position, limit, mark and the content of the buffer.

Specified by:

capacity in class IoBuffer

isAutoExpand

public final boolean isAutoExpand()

Description copied from class: IoBuffer

Returns true if and only if autoExpand is turned on.

Specified by:

isAutoExpand in class IoBuffer

isAutoShrink

public final boolean isAutoShrink()

Description copied from class: IoBuffer

Returns true if and only if autoShrink is turned on.

Specified by:

isAutoShrink in class IoBuffer

isDerived

public final boolean isDerived()

Description copied from class: IoBuffer

returns true if and only if this buffer is derived from other buffer via IoBuffer.duplicate(), IoBuffer.slice() or IoBuffer.asReadOnlyBuffer().

Specified by:

isDerived in class IoBuffer

setAutoExpand

public final IoBuffer setAutoExpand(boolean autoExpand)

Description copied from class: IoBuffer

Turns on or off autoExpand.

Specified by:

setAutoExpand in class IoBuffer

setAutoShrink

public final IoBuffer setAutoShrink(boolean autoShrink)

Description copied from class: IoBuffer

Turns on or off autoShrink.

Specified by:

setAutoShrink in class IoBuffer

expand

public final IoBuffer expand(int expectedRemaining)

Description copied from class: IoBuffer

Changes the capacity and limit of this buffer so this buffer get the specified expectedRemaining room from the current position. This method works even if you didn't set autoExpand to true.

Specified by:

expand in class IoBuffer

expand

public final IoBuffer expand(int pos,
                             int expectedRemaining)

Description copied from class: IoBuffer

Changes the capacity and limit of this buffer so this buffer get the specified expectedRemaining room from the specified position. This method works even if you didn't set autoExpand to true.

Specified by:

expand in class IoBuffer

shrink

public final IoBuffer shrink()

Description copied from class: IoBuffer

Changes the capacity of this buffer so this buffer occupies as less memory as possible while retaining the position, limit and the buffer content between the position and limit. The capacity of the buffer never becomes less than IoBuffer.minimumCapacity(). The mark is discarded once the capacity changes.

Specified by:

shrink in class IoBuffer

position

public final int position()

Specified by:

position in class IoBuffer

See Also:

Buffer.position()

position

public final IoBuffer position(int newPosition)

Specified by:

position in class IoBuffer

See Also:

Buffer.position(int)

limit

public final int limit()

Specified by:

limit in class IoBuffer

See Also:

Buffer.limit()

limit

public final IoBuffer limit(int newLimit)

Specified by:

limit in class IoBuffer

See Also:

Buffer.limit(int)

mark

public final IoBuffer mark()

Specified by:

mark in class IoBuffer

See Also:

Buffer.mark()

markValue

public final int markValue()

Description copied from class: IoBuffer

Returns the position of the current mark. This method returns -1 if no mark is set.

Specified by:

markValue in class IoBuffer

reset

public final IoBuffer reset()

Specified by:

reset in class IoBuffer

See Also:

Buffer.reset()

clear

public final IoBuffer clear()

Specified by:

clear in class IoBuffer

See Also:

Buffer.clear()

sweep

public final IoBuffer sweep()

Description copied from class: IoBuffer

Clears this buffer and fills its content with NUL. The position is set to zero, the limit is set to the capacity, and the mark is discarded.

Specified by:

sweep in class IoBuffer

sweep

public final IoBuffer sweep(byte value)

Description copied from class: IoBuffer

double Clears this buffer and fills its content with value. The position is set to zero, the limit is set to the capacity, and the mark is discarded.

Specified by:

sweep in class IoBuffer

flip

public final IoBuffer flip()

Specified by:

flip in class IoBuffer

See Also:

Buffer.flip()

rewind

public final IoBuffer rewind()

Specified by:

rewind in class IoBuffer

See Also:

Buffer.rewind()

remaining

public final int remaining()

Specified by:

remaining in class IoBuffer

See Also:

Buffer.remaining()

hasRemaining

public final boolean hasRemaining()

Specified by:

hasRemaining in class IoBuffer

See Also:

Buffer.hasRemaining()

get

public final byte get()

Specified by:

get in class IoBuffer

See Also:

ByteBuffer.get()

getUnsigned

public final short getUnsigned()

Description copied from class: IoBuffer

Reads one unsigned byte as a short integer.

Specified by:

getUnsigned in class IoBuffer

put

public final IoBuffer put(byte b)

Specified by:

put in class IoBuffer

See Also:

ByteBuffer.put(byte)

get

public final byte get(int index)

Specified by:

get in class IoBuffer

See Also:

ByteBuffer.get(int)

getUnsigned

public final short getUnsigned(int index)

Description copied from class: IoBuffer

Reads one byte as an unsigned short integer.

Specified by:

getUnsigned in class IoBuffer

put

public final IoBuffer put(int index,
                          byte b)

Specified by:

put in class IoBuffer

See Also:

ByteBuffer.put(int, byte)

get

public final IoBuffer get(byte[] dst,
                          int offset,
                          int length)

Specified by:

get in class IoBuffer

See Also:

ByteBuffer.get(byte[], int, int)

put

public final IoBuffer put(ByteBuffer src)

Description copied from class: IoBuffer

Writes the content of the specified src into this buffer.

Specified by:

put in class IoBuffer

put

public final IoBuffer put(byte[] src,
                          int offset,
                          int length)

Specified by:

put in class IoBuffer

See Also:

ByteBuffer.put(byte[], int, int)

compact

public final IoBuffer compact()

Specified by:

compact in class IoBuffer

See Also:

ByteBuffer.compact()

order

public final ByteOrder order()

Specified by:

order in class IoBuffer

See Also:

ByteBuffer.order()

order

public final IoBuffer order(ByteOrder bo)

Specified by:

order in class IoBuffer

See Also:

ByteBuffer.order(ByteOrder)

getChar

public final char getChar()

Specified by:

getChar in class IoBuffer

See Also:

ByteBuffer.getChar()

putChar

public final IoBuffer putChar(char value)

Specified by:

putChar in class IoBuffer

See Also:

ByteBuffer.putChar(char)

getChar

public final char getChar(int index)

Specified by:

getChar in class IoBuffer

See Also:

ByteBuffer.getChar(int)

putChar

public final IoBuffer putChar(int index,
                              char value)

Specified by:

putChar in class IoBuffer

See Also:

ByteBuffer.putChar(int, char)

asCharBuffer

public final CharBuffer asCharBuffer()

Specified by:

asCharBuffer in class IoBuffer

See Also:

ByteBuffer.asCharBuffer()

getShort

public final short getShort()

Specified by:

getShort in class IoBuffer

See Also:

ByteBuffer.getShort()

putShort

public final IoBuffer putShort(short value)

Specified by:

putShort in class IoBuffer

See Also:

ByteBuffer.putShort(short)

getShort

public final short getShort(int index)

Specified by:

getShort in class IoBuffer

See Also:

ByteBuffer.getShort()

putShort

public final IoBuffer putShort(int index,
                               short value)

Specified by:

putShort in class IoBuffer

See Also:

ByteBuffer.putShort(int, short)

asShortBuffer

public final ShortBuffer asShortBuffer()

Specified by:

asShortBuffer in class IoBuffer

See Also:

ByteBuffer.asShortBuffer()

getInt

public final int getInt()

Specified by:

getInt in class IoBuffer

See Also:

ByteBuffer.getInt()

putInt

public final IoBuffer putInt(int value)

Specified by:

putInt in class IoBuffer

See Also:

ByteBuffer.putInt(int)

getInt

public final int getInt(int index)

Specified by:

getInt in class IoBuffer

See Also:

ByteBuffer.getInt(int)

putInt

public final IoBuffer putInt(int index,
                             int value)

Specified by:

putInt in class IoBuffer

See Also:

ByteBuffer.putInt(int, int)

asIntBuffer

public final IntBuffer asIntBuffer()

Specified by:

asIntBuffer in class IoBuffer

See Also:

ByteBuffer.asIntBuffer()

getLong

public final long getLong()

Specified by:

getLong in class IoBuffer

See Also:

ByteBuffer.getLong()

putLong

public final IoBuffer putLong(long value)

Specified by:

putLong in class IoBuffer

See Also:

ByteBuffer.putLong(int, long)

getLong

public final long getLong(int index)

Specified by:

getLong in class IoBuffer

See Also:

ByteBuffer.getLong(int)

putLong

public final IoBuffer putLong(int index,
                              long value)

Specified by:

putLong in class IoBuffer

See Also:

ByteBuffer.putLong(int, long)

asLongBuffer

public final LongBuffer asLongBuffer()

Specified by:

asLongBuffer in class IoBuffer

See Also:

ByteBuffer.asLongBuffer()

getFloat

public final float getFloat()

Specified by:

getFloat in class IoBuffer

See Also:

ByteBuffer.getFloat()

putFloat

public final IoBuffer putFloat(float value)

Specified by:

putFloat in class IoBuffer

See Also:

ByteBuffer.putFloat(float)

getFloat

public final float getFloat(int index)

Specified by:

getFloat in class IoBuffer

See Also:

ByteBuffer.getFloat(int)

putFloat

public final IoBuffer putFloat(int index,
                               float value)

Specified by:

putFloat in class IoBuffer

See Also:

ByteBuffer.putFloat(int, float)

asFloatBuffer

public final FloatBuffer asFloatBuffer()

Specified by:

asFloatBuffer in class IoBuffer

See Also:

ByteBuffer.asFloatBuffer()

getDouble

public final double getDouble()

Specified by:

getDouble in class IoBuffer

See Also:

ByteBuffer.getDouble()

putDouble

public final IoBuffer putDouble(double value)

Specified by:

putDouble in class IoBuffer

See Also:

ByteBuffer.putDouble(double)

getDouble

public final double getDouble(int index)

Specified by:

getDouble in class IoBuffer

See Also:

ByteBuffer.getDouble(int)

putDouble

public final IoBuffer putDouble(int index,
                                double value)

Specified by:

putDouble in class IoBuffer

See Also:

ByteBuffer.putDouble(int, double)

asDoubleBuffer

public final DoubleBuffer asDoubleBuffer()

Specified by:

asDoubleBuffer in class IoBuffer

See Also:

ByteBuffer.asDoubleBuffer()

asReadOnlyBuffer

public final IoBuffer asReadOnlyBuffer()

Specified by:

asReadOnlyBuffer in class IoBuffer

See Also:

ByteBuffer.asReadOnlyBuffer()

asReadOnlyBuffer0

protected abstract IoBuffer asReadOnlyBuffer0()

Implement this method to return the unexpandable read only version of this buffer.

duplicate

public final IoBuffer duplicate()

Specified by:

duplicate in class IoBuffer

See Also:

ByteBuffer.duplicate()

duplicate0

protected abstract IoBuffer duplicate0()

Implement this method to return the unexpandable duplicate of this buffer.

slice

public final IoBuffer slice()

Specified by:

slice in class IoBuffer

See Also:

ByteBuffer.slice()

getSlice

public final IoBuffer getSlice(int index,
                               int length)

Description copied from class: IoBuffer

TODO document me.

Specified by:

getSlice in class IoBuffer

getSlice

public final IoBuffer getSlice(int length)

Description copied from class: IoBuffer

TODO document me.

Specified by:

getSlice in class IoBuffer

slice0

protected abstract IoBuffer slice0()

Implement this method to return the unexpandable slice of this buffer.

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

compareTo

public int compareTo(IoBuffer that)

toString

public String toString()

Overrides:

toString in class Object

get

public IoBuffer get(byte[] dst)

Specified by:

get in class IoBuffer

See Also:

ByteBuffer.get(byte[])

put

public IoBuffer put(IoBuffer src)

Description copied from class: IoBuffer

Writes the content of the specified src into this buffer.

Specified by:

put in class IoBuffer

put

public IoBuffer put(byte[] src)

Specified by:

put in class IoBuffer

See Also:

ByteBuffer.put(byte[])

getUnsignedShort

public int getUnsignedShort()

Description copied from class: IoBuffer

Reads two bytes unsigned integer.

Specified by:

getUnsignedShort in class IoBuffer

getUnsignedShort

public int getUnsignedShort(int index)

Description copied from class: IoBuffer

Reads two bytes unsigned integer.

Specified by:

getUnsignedShort in class IoBuffer

getUnsignedInt

public long getUnsignedInt()

Description copied from class: IoBuffer

Reads four bytes unsigned integer.

Specified by:

getUnsignedInt in class IoBuffer

getMediumInt

public int getMediumInt()

Description copied from class: IoBuffer

Relative get method for reading a medium int value.

Reads the next three bytes at this buffer's current position, composing them into an int value according to the current byte order, and then increments the position by three.

Specified by:

getMediumInt in class IoBuffer

Returns:

The medium int value at the buffer's current position

getUnsignedMediumInt

public int getUnsignedMediumInt()

Description copied from class: IoBuffer

Relative get method for reading an unsigned medium int value.

Reads the next three bytes at this buffer's current position, composing them into an int value according to the current byte order, and then increments the position by three.

Specified by:

getUnsignedMediumInt in class IoBuffer

Returns:

The unsigned medium int value at the buffer's current position

getMediumInt

public int getMediumInt(int index)

Description copied from class: IoBuffer

Absolute get method for reading a medium int value.

Reads the next three bytes at this buffer's current position, composing them into an int value according to the current byte order.

Specified by:

getMediumInt in class IoBuffer

Parameters:

index - The index from which the medium int will be read

Returns:

The medium int value at the given index

getUnsignedMediumInt

public int getUnsignedMediumInt(int index)

Description copied from class: IoBuffer

Absolute get method for reading an unsigned medium int value.

Reads the next three bytes at this buffer's current position, composing them into an int value according to the current byte order.

Specified by:

getUnsignedMediumInt in class IoBuffer

Parameters:

index - The index from which the unsigned medium int will be read

Returns:

The unsigned medium int value at the given index

putMediumInt

public IoBuffer putMediumInt(int value)

Description copied from class: IoBuffer

Relative put method for writing a medium int value.

Writes three bytes containing the given int value, in the current byte order, into this buffer at the current position, and then increments the position by three.

Specified by:

putMediumInt in class IoBuffer

Parameters:

value - The medium int value to be written

Returns:

This buffer

putMediumInt

public IoBuffer putMediumInt(int index,
                             int value)

Description copied from class: IoBuffer

Absolute put method for writing a medium int value.

Writes three bytes containing the given int value, in the current byte order, into this buffer at the given index.

Specified by:

putMediumInt in class IoBuffer

Parameters:

index - The index at which the bytes will be written

value - The medium int value to be written

Returns:

This buffer

getUnsignedInt

public long getUnsignedInt(int index)

Description copied from class: IoBuffer

Reads four bytes unsigned integer.

Specified by:

getUnsignedInt in class IoBuffer

asInputStream

public InputStream asInputStream()

Description copied from class: IoBuffer

Returns an InputStream that reads the data from this buffer. InputStream.read() returns -1 if the buffer position reaches to the limit.

Specified by:

asInputStream in class IoBuffer

asOutputStream

public OutputStream asOutputStream()

Description copied from class: IoBuffer

Returns an OutputStream that appends the data into this buffer. Please note that the OutputStream.write(int) will throw a BufferOverflowException instead of an IOException in case of buffer overflow. Please set autoExpand property by calling IoBuffer.setAutoExpand(boolean) to prevent the unexpected runtime exception.

Specified by:

asOutputStream in class IoBuffer

getHexDump

public String getHexDump()

Description copied from class: IoBuffer

Returns hexdump of this buffer. The data and pointer are not changed as a result of this method call.

Specified by:

getHexDump in class IoBuffer

Returns:

hexidecimal representation of this buffer

getHexDump

public String getHexDump(int lengthLimit)

Description copied from class: IoBuffer

Return hexdump of this buffer with limited length.

Specified by:

getHexDump in class IoBuffer

Parameters:

lengthLimit - The maximum number of bytes to dump from the current buffer position.

Returns:

hexidecimal representation of this buffer

getString

public String getString(CharsetDecoder decoder)
                 throws CharacterCodingException

Description copied from class: IoBuffer

Reads a NUL-terminated string from this buffer using the specified decoder and returns it. This method reads until the limit of this buffer if no NUL is found.

Specified by:

getString in class IoBuffer

Throws:

CharacterCodingException

getString

public String getString(int fieldSize,
                        CharsetDecoder decoder)
                 throws CharacterCodingException

Description copied from class: IoBuffer

Reads a NUL-terminated string from this buffer using the specified decoder and returns it.

Specified by:

getString in class IoBuffer

Parameters:

fieldSize - the maximum number of bytes to read

Throws:

CharacterCodingException

putString

public IoBuffer putString(CharSequence val,
                          CharsetEncoder encoder)
                   throws CharacterCodingException

Description copied from class: IoBuffer

Writes the content of in into this buffer using the specified encoder. This method doesn't terminate string with NUL. You have to do it by yourself.

Specified by:

putString in class IoBuffer

Throws:

CharacterCodingException

putString

public IoBuffer putString(CharSequence val,
                          int fieldSize,
                          CharsetEncoder encoder)
                   throws CharacterCodingException

Description copied from class: IoBuffer

Writes the content of in into this buffer as a NUL-terminated string using the specified encoder.

If the charset name of the encoder is UTF-16, you cannot specify odd fieldSize, and this method will append two NULs as a terminator.

Please note that this method doesn't terminate with NUL if the input string is longer than fieldSize.

Specified by:

putString in class IoBuffer

fieldSize - the maximum number of bytes to write

Throws:

CharacterCodingException

getPrefixedString

public String getPrefixedString(CharsetDecoder decoder)
                         throws CharacterCodingException

Description copied from class: IoBuffer

Reads a string which has a 16-bit length field before the actual encoded string, using the specified decoder and returns it. This method is a shortcut for getPrefixedString(2, decoder).

Specified by:

getPrefixedString in class IoBuffer

Throws:

CharacterCodingException

getPrefixedString

public String getPrefixedString(int prefixLength,
                                CharsetDecoder decoder)
                         throws CharacterCodingException

Reads a string which has a length field before the actual encoded string, using the specified decoder and returns it.

Specified by:

getPrefixedString in class IoBuffer

Parameters:

prefixLength - the length of the length field (1, 2, or 4)

decoder - the decoder to use for decoding the string

Returns:

the prefixed string

Throws:

CharacterCodingException - when decoding fails

BufferUnderflowException - when there is not enough data available

putPrefixedString

public IoBuffer putPrefixedString(CharSequence in,
                                  CharsetEncoder encoder)
                           throws CharacterCodingException

Description copied from class: IoBuffer

Writes the content of in into this buffer as a string which has a 16-bit length field before the actual encoded string, using the specified encoder. This method is a shortcut for putPrefixedString(in, 2, 0, encoder).

Specified by:

putPrefixedString in class IoBuffer

Throws:

CharacterCodingException

putPrefixedString

public IoBuffer putPrefixedString(CharSequence in,
                                  int prefixLength,
                                  CharsetEncoder encoder)
                           throws CharacterCodingException

Description copied from class: IoBuffer

Writes the content of in into this buffer as a string which has a 16-bit length field before the actual encoded string, using the specified encoder. This method is a shortcut for putPrefixedString(in, prefixLength, 0, encoder).

Specified by:

putPrefixedString in class IoBuffer

prefixLength - the length of the length field (1, 2, or 4)

Throws:

CharacterCodingException

putPrefixedString

public IoBuffer putPrefixedString(CharSequence in,
                                  int prefixLength,
                                  int padding,
                                  CharsetEncoder encoder)
                           throws CharacterCodingException

Description copied from class: IoBuffer

Writes the content of in into this buffer as a string which has a 16-bit length field before the actual encoded string, using the specified encoder. This method is a shortcut for putPrefixedString(in, prefixLength, padding, ( byte ) 0, encoder).

Specified by:

putPrefixedString in class IoBuffer

prefixLength - the length of the length field (1, 2, or 4)

padding - the number of padded NULs (1 (or 0), 2, or 4)

Throws:

CharacterCodingException

putPrefixedString

public IoBuffer putPrefixedString(CharSequence val,
                                  int prefixLength,
                                  int padding,
                                  byte padValue,
                                  CharsetEncoder encoder)
                           throws CharacterCodingException

Description copied from class: IoBuffer

Writes the content of in into this buffer as a string which has a 16-bit length field before the actual encoded string, using the specified encoder.

Specified by:

putPrefixedString in class IoBuffer

prefixLength - the length of the length field (1, 2, or 4)

padding - the number of padded bytes (1 (or 0), 2, or 4)

padValue - the value of padded bytes

Throws:

CharacterCodingException

getObject

public Object getObject()
                 throws ClassNotFoundException

Description copied from class: IoBuffer

Reads a Java object from the buffer using the context ClassLoader of the current thread.

Specified by:

getObject in class IoBuffer

Throws:

ClassNotFoundException

getObject

public Object getObject(ClassLoader classLoader)
                 throws ClassNotFoundException

Description copied from class: IoBuffer

Reads a Java object from the buffer using the specified classLoader.

Specified by:

getObject in class IoBuffer

Throws:

ClassNotFoundException

putObject

public IoBuffer putObject(Object o)

Description copied from class: IoBuffer

Writes the specified Java object to the buffer.

Specified by:

putObject in class IoBuffer

prefixedDataAvailable

public boolean prefixedDataAvailable(int prefixLength)

Description copied from class: IoBuffer

Returns true if this buffer contains a data which has a data length as a prefix and the buffer has remaining data as enough as specified in the data length field. This method is identical with prefixedDataAvailable( prefixLength, Integer.MAX_VALUE ). Please not that using this method can allow DoS (Denial of Service) attack in case the remote peer sends too big data length value. It is recommended to use IoBuffer.prefixedDataAvailable(int, int) instead.

Specified by:

prefixedDataAvailable in class IoBuffer

Parameters:

prefixLength - the length of the prefix field (1, 2, or 4)

prefixedDataAvailable

public boolean prefixedDataAvailable(int prefixLength,
                                     int maxDataLength)

Description copied from class: IoBuffer

Returns true if this buffer contains a data which has a data length as a prefix and the buffer has remaining data as enough as specified in the data length field.

Specified by:

prefixedDataAvailable in class IoBuffer

Parameters:

prefixLength - the length of the prefix field (1, 2, or 4)

maxDataLength - the allowed maximum of the read data length

indexOf

public int indexOf(byte b)

Description copied from class: IoBuffer

Returns the first occurence position of the specified byte from the current position to the current limit.

Specified by:

indexOf in class IoBuffer

Returns:

-1 if the specified byte is not found

skip

public IoBuffer skip(int size)

Description copied from class: IoBuffer

Forwards the position of this buffer as the specified size bytes.

Specified by:

skip in class IoBuffer

fill

public IoBuffer fill(byte value,
                     int size)

Description copied from class: IoBuffer

Fills this buffer with the specified value. This method moves buffer position forward.

Specified by:

fill in class IoBuffer

fillAndReset

public IoBuffer fillAndReset(byte value,
                             int size)

Description copied from class: IoBuffer

Fills this buffer with the specified value. This method does not change buffer position.

Specified by:

fillAndReset in class IoBuffer

fill

public IoBuffer fill(int size)

Description copied from class: IoBuffer

Fills this buffer with NUL (0x00). This method moves buffer position forward.

Specified by:

fill in class IoBuffer

fillAndReset

public IoBuffer fillAndReset(int size)

Description copied from class: IoBuffer

Fills this buffer with NUL (0x00). This method does not change buffer position.

Specified by:

fillAndReset in class IoBuffer

getEnum

public <E extends Enum<E>> E getEnum(Class<E> enumClass)

Description copied from class: IoBuffer

Reads a byte from the buffer and returns the correlating enum constant defined by the specified enum type.

Specified by:

getEnum in class IoBuffer

Type Parameters:

E - The enum type to return

Parameters:

enumClass - The enum's class object

getEnum

public <E extends Enum<E>> E getEnum(int index,
                                     Class<E> enumClass)

Description copied from class: IoBuffer

Reads a byte from the buffer and returns the correlating enum constant defined by the specified enum type.

Specified by:

getEnum in class IoBuffer

Type Parameters:

E - The enum type to return

Parameters:

index - the index from which the byte will be read

enumClass - The enum's class object

getEnumShort

public <E extends Enum<E>> E getEnumShort(Class<E> enumClass)

Description copied from class: IoBuffer

Reads a short from the buffer and returns the correlating enum constant defined by the specified enum type.

Specified by:

getEnumShort in class IoBuffer

Type Parameters:

E - The enum type to return

Parameters:

enumClass - The enum's class object

getEnumShort

public <E extends Enum<E>> E getEnumShort(int index,
                                          Class<E> enumClass)

Description copied from class: IoBuffer

Reads a short from the buffer and returns the correlating enum constant defined by the specified enum type.

Specified by:

getEnumShort in class IoBuffer

Type Parameters:

E - The enum type to return

Parameters:

index - the index from which the bytes will be read

enumClass - The enum's class object

getEnumInt

public <E extends Enum<E>> E getEnumInt(Class<E> enumClass)

Description copied from class: IoBuffer

Reads an int from the buffer and returns the correlating enum constant defined by the specified enum type.

Specified by:

getEnumInt in class IoBuffer

Type Parameters:

E - The enum type to return

Parameters:

enumClass - The enum's class object

getEnumInt

public <E extends Enum<E>> E getEnumInt(int index,
                                        Class<E> enumClass)

Description copied from class: IoBuffer

Reads an int from the buffer and returns the correlating enum constant defined by the specified enum type.

Specified by:

getEnumInt in class IoBuffer

Type Parameters:

E - The enum type to return

Parameters:

index - the index from which the bytes will be read

enumClass - The enum's class object

putEnum

public IoBuffer putEnum(Enum<?> e)

Description copied from class: IoBuffer

Writes an enum's ordinal value to the buffer as a byte.

Specified by:

putEnum in class IoBuffer

Parameters:

e - The enum to write to the buffer

putEnum

public IoBuffer putEnum(int index,
                        Enum<?> e)

Description copied from class: IoBuffer

Writes an enum's ordinal value to the buffer as a byte.

Specified by:

putEnum in class IoBuffer

Parameters:

index - The index at which the byte will be written

e - The enum to write to the buffer

putEnumShort

public IoBuffer putEnumShort(Enum<?> e)

Description copied from class: IoBuffer

Writes an enum's ordinal value to the buffer as a short.

Specified by:

putEnumShort in class IoBuffer

Parameters:

e - The enum to write to the buffer

putEnumShort

public IoBuffer putEnumShort(int index,
                             Enum<?> e)

Description copied from class: IoBuffer

Writes an enum's ordinal value to the buffer as a short.

Specified by:

putEnumShort in class IoBuffer

Parameters:

index - The index at which the bytes will be written

e - The enum to write to the buffer

putEnumInt

public IoBuffer putEnumInt(Enum<?> e)

Description copied from class: IoBuffer

Writes an enum's ordinal value to the buffer as an integer.

Specified by:

putEnumInt in class IoBuffer

Parameters:

e - The enum to write to the buffer

putEnumInt

public IoBuffer putEnumInt(int index,
                           Enum<?> e)

Description copied from class: IoBuffer

Writes an enum's ordinal value to the buffer as an integer.

Specified by:

putEnumInt in class IoBuffer

Parameters:

index - The index at which the bytes will be written

e - The enum to write to the buffer

getEnumSet

public <E extends Enum<E>> EnumSet<E> getEnumSet(Class<E> enumClass)

Description copied from class: IoBuffer

Reads a byte sized bit vector and converts it to an EnumSet.

Each bit is mapped to a value in the specified enum. The least significant bit maps to the first entry in the specified enum and each subsequent bit maps to each subsequent bit as mapped to the subsequent enum value.

Specified by:

getEnumSet in class IoBuffer

Type Parameters:

E - the enum type

Parameters:

enumClass - the enum class used to create the EnumSet

Returns:

the EnumSet representation of the bit vector

getEnumSet

public <E extends Enum<E>> EnumSet<E> getEnumSet(int index,
                                                 Class<E> enumClass)

Description copied from class: IoBuffer

Reads a byte sized bit vector and converts it to an EnumSet.

Specified by:

getEnumSet in class IoBuffer

Type Parameters:

E - the enum type

Parameters:

index - the index from which the byte will be read

enumClass - the enum class used to create the EnumSet

Returns:

the EnumSet representation of the bit vector

See Also:

IoBuffer.getEnumSet(Class)

getEnumSetShort

public <E extends Enum<E>> EnumSet<E> getEnumSetShort(Class<E> enumClass)

Description copied from class: IoBuffer

Reads a short sized bit vector and converts it to an EnumSet.

Specified by:

getEnumSetShort in class IoBuffer

Type Parameters:

E - the enum type

Parameters:

enumClass - the enum class used to create the EnumSet

Returns:

the EnumSet representation of the bit vector

See Also:

IoBuffer.getEnumSet(Class)

getEnumSetShort

public <E extends Enum<E>> EnumSet<E> getEnumSetShort(int index,
                                                      Class<E> enumClass)

Description copied from class: IoBuffer

Reads a short sized bit vector and converts it to an EnumSet.

Specified by:

getEnumSetShort in class IoBuffer

Type Parameters:

E - the enum type

Parameters:

index - the index from which the bytes will be read

enumClass - the enum class used to create the EnumSet

Returns:

the EnumSet representation of the bit vector

See Also:

IoBuffer.getEnumSet(Class)

getEnumSetInt

public <E extends Enum<E>> EnumSet<E> getEnumSetInt(Class<E> enumClass)

Description copied from class: IoBuffer

Reads an int sized bit vector and converts it to an EnumSet.

Specified by:

getEnumSetInt in class IoBuffer

Type Parameters:

E - the enum type

Parameters:

enumClass - the enum class used to create the EnumSet

Returns:

the EnumSet representation of the bit vector

See Also:

IoBuffer.getEnumSet(Class)

getEnumSetInt

public <E extends Enum<E>> EnumSet<E> getEnumSetInt(int index,
                                                    Class<E> enumClass)

Description copied from class: IoBuffer

Reads an int sized bit vector and converts it to an EnumSet.

Specified by:

getEnumSetInt in class IoBuffer

Type Parameters:

E - the enum type

Parameters:

index - the index from which the bytes will be read

enumClass - the enum class used to create the EnumSet

Returns:

the EnumSet representation of the bit vector

See Also:

IoBuffer.getEnumSet(Class)

getEnumSetLong

public <E extends Enum<E>> EnumSet<E> getEnumSetLong(Class<E> enumClass)

Description copied from class: IoBuffer

Reads a long sized bit vector and converts it to an EnumSet.

Specified by:

getEnumSetLong in class IoBuffer

Type Parameters:

E - the enum type

Parameters:

enumClass - the enum class used to create the EnumSet

Returns:

the EnumSet representation of the bit vector

See Also:

IoBuffer.getEnumSet(Class)

getEnumSetLong

public <E extends Enum<E>> EnumSet<E> getEnumSetLong(int index,
                                                     Class<E> enumClass)

Description copied from class: IoBuffer

Reads a long sized bit vector and converts it to an EnumSet.

Specified by:

getEnumSetLong in class IoBuffer

Type Parameters:

E - the enum type

Parameters:

index - the index from which the bytes will be read

enumClass - the enum class used to create the EnumSet

Returns:

the EnumSet representation of the bit vector

See Also:

IoBuffer.getEnumSet(Class)

putEnumSet

public <E extends Enum<E>> IoBuffer putEnumSet(Set<E> set)

Description copied from class: IoBuffer

Writes the specified Set to the buffer as a byte sized bit vector.

Specified by:

putEnumSet in class IoBuffer

Type Parameters:

E - the enum type of the Set

Parameters:

set - the enum set to write to the buffer

putEnumSet

public <E extends Enum<E>> IoBuffer putEnumSet(int index,
                                               Set<E> set)

Description copied from class: IoBuffer

Writes the specified Set to the buffer as a byte sized bit vector.

Specified by:

putEnumSet in class IoBuffer

Type Parameters:

E - the enum type of the Set

Parameters:

index - the index at which the byte will be written

set - the enum set to write to the buffer

putEnumSetShort

public <E extends Enum<E>> IoBuffer putEnumSetShort(Set<E> set)

Description copied from class: IoBuffer

Writes the specified Set to the buffer as a short sized bit vector.

Specified by:

putEnumSetShort in class IoBuffer

Type Parameters:

E - the enum type of the Set

Parameters:

set - the enum set to write to the buffer

putEnumSetShort

public <E extends Enum<E>> IoBuffer putEnumSetShort(int index,
                                                    Set<E> set)

Description copied from class: IoBuffer

Writes the specified Set to the buffer as a short sized bit vector.

Specified by:

putEnumSetShort in class IoBuffer

Type Parameters:

E - the enum type of the Set

Parameters:

index - the index at which the bytes will be written

set - the enum set to write to the buffer

putEnumSetInt

public <E extends Enum<E>> IoBuffer putEnumSetInt(Set<E> set)

Description copied from class: IoBuffer

Writes the specified Set to the buffer as an int sized bit vector.

Specified by:

putEnumSetInt in class IoBuffer

Type Parameters:

E - the enum type of the Set

Parameters:

set - the enum set to write to the buffer

putEnumSetInt

public <E extends Enum<E>> IoBuffer putEnumSetInt(int index,
                                                  Set<E> set)

Description copied from class: IoBuffer

Writes the specified Set to the buffer as an int sized bit vector.

Specified by:

putEnumSetInt in class IoBuffer

Type Parameters:

E - the enum type of the Set

Parameters:

index - the index at which the bytes will be written

set - the enum set to write to the buffer

putEnumSetLong

public <E extends Enum<E>> IoBuffer putEnumSetLong(Set<E> set)

Description copied from class: IoBuffer

Writes the specified Set to the buffer as a long sized bit vector.

Specified by:

putEnumSetLong in class IoBuffer

Type Parameters:

E - the enum type of the Set

Parameters:

set - the enum set to write to the buffer

putEnumSetLong

public <E extends Enum<E>> IoBuffer putEnumSetLong(int index,
                                                   Set<E> set)

Description copied from class: IoBuffer

Writes the specified Set to the buffer as a long sized bit vector.

Specified by:

putEnumSetLong in class IoBuffer

Type Parameters:

E - the enum type of the Set

Parameters:

index - the index at which the bytes will be written

set - the enum set to write to the buffer