H2 Database Engine 2.3.232 · org.h2.mvstore.WriteBuffer

Modifier and Type	Field and Description
private ByteBuffer	buff The current buffer (may be replaced if it is too small).
private static final int	MAX_REUSE_CAPACITY The maximum size of the buffer in order to be re-used after a clear operation.
private static final int	MIN_GROW The minimum number of bytes to grow a buffer at a time.
private ByteBuffer	reuse The buffer that is used after a clear operation.

Access	Constructor and Description
public	WriteBuffer(int initialSize)
public	WriteBuffer()

Method Summary

Modifier and Type	Method and Description
public int	Returns: the capacity capacity() Get the capacity.
public WriteBuffer	Returns: this clear() Clear the buffer after use.
private ByteBuffer	ensureCapacity(int len)
public WriteBuffer	Returns: this get(byte[] the destination array dst) Copy the data into the destination array.
public ByteBuffer	Returns: the byte buffer getBuffer() Get the byte buffer.
private void	grow(int additional)
public WriteBuffer	Returns: this limit(int the new limit newLimit) Set the limit, possibly growing the buffer.
public int	Returns: the limit limit() Get the limit.
public WriteBuffer	Returns: the new position position(int the new position newPosition) Set the position.
public int	Returns: the position position() Get the current position.
public WriteBuffer	Returns: this put(byte the value x) Put a byte.
public WriteBuffer	Returns: this put(byte[] the value bytes) Put a byte array.
public WriteBuffer	Returns: this put(byte[] the value bytes, int the source offset offset, int the number of bytes length) Put a byte array.
public WriteBuffer	Returns: this put(ByteBuffer the source buffer src) Put the contents of a byte buffer.
public WriteBuffer	Returns: this putChar(char the value x) Put a character.
public WriteBuffer	Returns: this putDouble(double the value x) Put a double.
public WriteBuffer	Returns: this putFloat(float the value x) Put a float.
public WriteBuffer	Returns: this putInt(int the value x) Put an integer.
public WriteBuffer	Returns: this putInt(int the index index, int the value value) Update an integer at the given index.
public WriteBuffer	Returns: this putLong(long the value x) Put a long.
public WriteBuffer	Returns: this putShort(short the value x) Put a short.
public WriteBuffer	Returns: this putShort(int the index index, short the value value) Update a short at the given index.
public WriteBuffer	Returns: this putStringData(String the string s, int the number of characters to write len) Write the characters of a string in a format similar to UTF-8.
public WriteBuffer	Returns: this putVarInt(int the value x) Write a variable size integer.
public WriteBuffer	Returns: this putVarLong(long the value x) Write a variable size long.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

buff	back to summary
private ByteBuffer buff The current buffer (may be replaced if it is too small).

MAX_REUSE_CAPACITY	back to summary
private static final int MAX_REUSE_CAPACITY The maximum size of the buffer in order to be re-used after a clear operation.

MIN_GROW	back to summary
private static final int MIN_GROW The minimum number of bytes to grow a buffer at a time.

reuse	back to summary
private ByteBuffer reuse The buffer that is used after a clear operation.

WriteBuffer	back to summary
public WriteBuffer(int initialSize)

WriteBuffer	back to summary
public WriteBuffer()

Method Detail

capacity	back to summary
public int capacity() Get the capacity. Returns:int the capacity

capacity

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public int capacity()

Get the capacity.

Returns:int: the capacity

clear	back to summary
public WriteBuffer clear() Clear the buffer after use. Returns:WriteBuffer this

clear

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public WriteBuffer clear()

Clear the buffer after use.

Returns:WriteBuffer: this

ensureCapacity	back to summary
private ByteBuffer ensureCapacity(int len)

get	back to summary
public WriteBuffer get(byte[] dst) Copy the data into the destination array. Parameters dst:byte[] the destination array Returns:WriteBuffer this

get

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public WriteBuffer get(byte[] dst)

Copy the data into the destination array.

Parameters

dst:byte[]: the destination array

Returns:WriteBuffer

this

getBuffer	back to summary
public ByteBuffer getBuffer() Get the byte buffer. Returns:ByteBuffer the byte buffer

getBuffer

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public ByteBuffer getBuffer()

Get the byte buffer.

Returns:ByteBuffer: the byte buffer

grow	back to summary
private void grow(int additional)

limit	back to summary
public WriteBuffer limit(int newLimit) Set the limit, possibly growing the buffer. Parameters newLimit:int the new limit Returns:WriteBuffer this

limit

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public WriteBuffer limit(int newLimit)

Set the limit, possibly growing the buffer.

Parameters

newLimit:int: the new limit

Returns:WriteBuffer

this

limit	back to summary
public int limit() Get the limit. Returns:int the limit

limit

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public int limit()

Get the limit.

Returns:int: the limit

position	back to summary
public WriteBuffer position(int newPosition) Set the position. Parameters newPosition:int the new position Returns:WriteBuffer the new position

position

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public WriteBuffer position(int newPosition)

Set the position.

Parameters

newPosition:int: the new position

Returns:WriteBuffer

the new position

position	back to summary
public int position() Get the current position. Returns:int the position

position

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public int position()

Get the current position.

Returns:int: the position

put	back to summary
public WriteBuffer put(byte x) Put a byte. Parameters x:byte the value Returns:WriteBuffer this

put

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public WriteBuffer put(byte x)

Put a byte.

Parameters

x:byte: the value

Returns:WriteBuffer

this

put	back to summary
public WriteBuffer put(byte[] bytes) Put a byte array. Parameters bytes:byte[] the value Returns:WriteBuffer this

put

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public WriteBuffer put(byte[] bytes)

Put a byte array.

Parameters

bytes:byte[]: the value

Returns:WriteBuffer

this

put	back to summary
public WriteBuffer put(byte[] bytes, int offset, int length) Put a byte array. Parameters bytes:byte[] the value offset:int the source offset length:int the number of bytes Returns:WriteBuffer this

put

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public WriteBuffer put(byte[] bytes, int offset, int length)

Put a byte array.

Parameters

bytes:byte[]: the value
offset:int: the source offset
length:int: the number of bytes

Returns:WriteBuffer

this

put	back to summary
public WriteBuffer put(ByteBuffer src) Put the contents of a byte buffer. Parameters src:ByteBuffer the source buffer Returns:WriteBuffer this

put

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public WriteBuffer put(ByteBuffer src)

Put the contents of a byte buffer.

Parameters

src:ByteBuffer: the source buffer

Returns:WriteBuffer

this

putChar	back to summary
public WriteBuffer putChar(char x) Put a character. Parameters x:char the value Returns:WriteBuffer this

putChar

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public WriteBuffer putChar(char x)

Put a character.

Parameters

x:char: the value

Returns:WriteBuffer

this

putDouble	back to summary
public WriteBuffer putDouble(double x) Put a double. Parameters x:double the value Returns:WriteBuffer this

putDouble

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public WriteBuffer putDouble(double x)

Put a double.

Parameters

x:double: the value

Returns:WriteBuffer

this

putFloat	back to summary
public WriteBuffer putFloat(float x) Put a float. Parameters x:float the value Returns:WriteBuffer this

putFloat

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public WriteBuffer putFloat(float x)

Put a float.

Parameters

x:float: the value

Returns:WriteBuffer

this

putInt	back to summary
public WriteBuffer putInt(int x) Put an integer. Parameters x:int the value Returns:WriteBuffer this

putInt

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public WriteBuffer putInt(int x)

Put an integer.

Parameters

x:int: the value

Returns:WriteBuffer

this

putInt	back to summary
public WriteBuffer putInt(int index, int value) Update an integer at the given index. Parameters index:int the index value:int the value Returns:WriteBuffer this

putInt

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public WriteBuffer putInt(int index, int value)

Update an integer at the given index.

Parameters

index:int: the index
value:int: the value

Returns:WriteBuffer

this

putLong	back to summary
public WriteBuffer putLong(long x) Put a long. Parameters x:long the value Returns:WriteBuffer this

putLong

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public WriteBuffer putLong(long x)

Put a long.

Parameters

x:long: the value

Returns:WriteBuffer

this

putShort	back to summary
public WriteBuffer putShort(short x) Put a short. Parameters x:short the value Returns:WriteBuffer this

putShort

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public WriteBuffer putShort(short x)

Put a short.

Parameters

x:short: the value

Returns:WriteBuffer

this

putShort	back to summary
public WriteBuffer putShort(int index, short value) Update a short at the given index. Parameters index:int the index value:short the value Returns:WriteBuffer this

putShort

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public WriteBuffer putShort(int index, short value)

Update a short at the given index.

Parameters

index:int: the index
value:short: the value

Returns:WriteBuffer

this

putStringData	back to summary
public WriteBuffer putStringData(String s, int len) Write the characters of a string in a format similar to UTF-8. Parameters s:String the string len:int the number of characters to write Returns:WriteBuffer this

putStringData

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public WriteBuffer putStringData(String s, int len)

Write the characters of a string in a format similar to UTF-8.

Parameters