程序包 cn.taketoday.core.io.buffer

类 DefaultDataBuffer

java.lang.Object

cn.taketoday.core.io.buffer.DefaultDataBuffer

所有已实现的接口:

DataBuffer

public class DefaultDataBuffer
extends Object
implements DataBuffer

Default implementation of the DataBuffer interface that uses a ByteBuffer internally. with separate read and write positions. Constructed using the DefaultDataBufferFactory.

Inspired by Netty's ByteBuf. Introduced so that non-Netty runtimes (i.e. Servlet) do not require Netty on the classpath.

从以下版本开始:

4.0

作者:

Arjen Poutsma, Juergen Hoeller, Brian Clozel

另请参阅:

• DefaultDataBufferFactory

方法概要

修饰符和类型	方法	说明
ByteBuffer	asByteBuffer()	Expose this buffer's bytes as a ByteBuffer.
ByteBuffer	asByteBuffer(int index, int length)	Expose a subsequence of this buffer's bytes as a ByteBuffer.
int	capacity()	Return the number of bytes that this buffer can contain.
DataBuffer	capacity(int capacity)	Set the number of bytes that this buffer can contain.
DataBuffer	ensureWritable(int length)	Ensure that the current buffer has enough DataBuffer.writableByteCount() to write the amount of data given as an argument.
boolean	equals(Object other)
DefaultDataBufferFactory	factory()	Return the DataBufferFactory that created this buffer.
byte	getByte(int index)	Read a single byte at the given index from this data buffer.
ByteBuffer	getNativeBuffer()	Directly exposes the native ByteBuffer that this buffer is based on also updating the ByteBuffer's position and limit to match the current readPosition() and readableByteCount().
int	hashCode()
int	indexOf(IntPredicate predicate, int fromIndex)	Return the index of the first byte in this buffer that matches the given predicate.
int	lastIndexOf(IntPredicate predicate, int fromIndex)	Return the index of the last byte in this buffer that matches the given predicate.
byte	read()	Read a single byte from the current reading position from this data buffer.
DefaultDataBuffer	read(byte[] destination)	Read this buffer's data into the specified destination, starting at the current reading position of this buffer.
DefaultDataBuffer	read(byte[] destination, int offset, int length)	Read at most length bytes of this buffer into the specified destination, starting at the current reading position of this buffer.
int	readableByteCount()	Return the number of bytes that can be read from this data buffer.
int	readPosition()	Return the position from which this buffer will read.
DefaultDataBuffer	readPosition(int readPosition)	Set the position from which this buffer will read.
DefaultDataBuffer	slice(int index, int length)	Create a new DataBuffer whose contents is a shared subsequence of this data buffer's content.
DataBuffer	split(int index)	Splits this data buffer into two at the given index.
ByteBuffer	toByteBuffer(int index, int length)	Returns a ByteBuffer representation of a subsequence of this buffer's bytes.
String	toString()
String	toString(int index, int length, Charset charset)	Return a part of this buffer's data as a String using the specified charset.
int	writableByteCount()	Return the number of bytes that can be written to this data buffer.
DefaultDataBuffer	write(byte b)	Write a single byte into this buffer at the current writing position.
DefaultDataBuffer	write(byte[] source)	Write the given source into this buffer, starting at the current writing position of this buffer.
DefaultDataBuffer	write(byte[] source, int offset, int length)	Write at most length bytes of the given source into this buffer, starting at the current writing position of this buffer.
DefaultDataBuffer	write(DataBuffer... buffers)	Write one or more DataBuffers to this buffer, starting at the current writing position.
DefaultDataBuffer	write(ByteBuffer... buffers)	Write one or more ByteBuffer to this buffer, starting at the current writing position.
int	writePosition()	Return the position to which this buffer will write.
DefaultDataBuffer	writePosition(int writePosition)	Set the position to which this buffer will write.

从类继承的方法 java.lang.Object

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

从接口继承的方法 cn.taketoday.core.io.buffer.DataBuffer

asInputStream, asInputStream, asOutputStream, ensureCapacity, retainedSlice, toByteBuffer, toString, write

方法详细资料

getNativeBuffer

public ByteBuffer getNativeBuffer()

Directly exposes the native ByteBuffer that this buffer is based on also updating the ByteBuffer's position and limit to match the current readPosition() and readableByteCount().

返回:

the wrapped byte buffer

factory

public DefaultDataBufferFactory factory()

从接口复制的说明: DataBuffer

Return the DataBufferFactory that created this buffer.

指定者:

factory 在接口中 DataBuffer

返回:

the creating buffer factory

indexOf

public int indexOf(IntPredicate predicate,
 int fromIndex)

从接口复制的说明: DataBuffer

Return the index of the first byte in this buffer that matches the given predicate.

指定者:

indexOf 在接口中 DataBuffer

参数:

predicate - the predicate to match

fromIndex - the index to start the search from

返回:

the index of the first byte that matches predicate; or -1 if none match

lastIndexOf

public int lastIndexOf(IntPredicate predicate,
 int fromIndex)

从接口复制的说明: DataBuffer

Return the index of the last byte in this buffer that matches the given predicate.

指定者:

lastIndexOf 在接口中 DataBuffer

参数:

predicate - the predicate to match

fromIndex - the index to start the search from

返回:

the index of the last byte that matches predicate; or -1 if none match

readableByteCount

public int readableByteCount()

从接口复制的说明: DataBuffer

Return the number of bytes that can be read from this data buffer.

指定者:

readableByteCount 在接口中 DataBuffer

返回:

the readable byte count

writableByteCount

public int writableByteCount()

从接口复制的说明: DataBuffer

Return the number of bytes that can be written to this data buffer.

指定者:

writableByteCount 在接口中 DataBuffer

返回:

the writable byte count

readPosition

public int readPosition()

从接口复制的说明: DataBuffer

Return the position from which this buffer will read.

指定者:

readPosition 在接口中 DataBuffer

返回:

the read position

readPosition

public DefaultDataBuffer readPosition(int readPosition)

从接口复制的说明: DataBuffer

Set the position from which this buffer will read.

指定者:

readPosition 在接口中 DataBuffer

参数:

readPosition - the new read position

返回:

this buffer

writePosition

public int writePosition()

从接口复制的说明: DataBuffer

Return the position to which this buffer will write.

指定者:

writePosition 在接口中 DataBuffer

返回:

the write position

writePosition

public DefaultDataBuffer writePosition(int writePosition)

从接口复制的说明: DataBuffer

Set the position to which this buffer will write.

指定者:

writePosition 在接口中 DataBuffer

参数:

writePosition - the new write position

返回:

this buffer

capacity

public int capacity()

从接口复制的说明: DataBuffer

Return the number of bytes that this buffer can contain.

指定者:

capacity 在接口中 DataBuffer

返回:

the capacity

capacity

public DataBuffer capacity(int capacity)

从接口复制的说明: DataBuffer

Set the number of bytes that this buffer can contain.

If the new capacity is lower than the current capacity, the contents of this buffer will be truncated. If the new capacity is higher than the current capacity, it will be expanded.

指定者:

capacity 在接口中 DataBuffer

参数:

capacity - the new capacity

返回:

this buffer

ensureWritable

public DataBuffer ensureWritable(int length)

从接口复制的说明: DataBuffer

Ensure that the current buffer has enough DataBuffer.writableByteCount() to write the amount of data given as an argument. If not, the missing capacity will be added to the buffer.

指定者:

ensureWritable 在接口中 DataBuffer

参数:

length - the writable capacity to check for

返回:

this buffer

getByte

public byte getByte(int index)

从接口复制的说明: DataBuffer

Read a single byte at the given index from this data buffer.

指定者:

getByte 在接口中 DataBuffer

参数:

index - the index at which the byte will be read

返回:

the byte at the given index

read

public byte read()

从接口复制的说明: DataBuffer

Read a single byte from the current reading position from this data buffer.

指定者:

read 在接口中 DataBuffer

返回:

the byte at this buffer's current reading position

read

public DefaultDataBuffer read(byte[] destination)

从接口复制的说明: DataBuffer

Read this buffer's data into the specified destination, starting at the current reading position of this buffer.

指定者:

read 在接口中 DataBuffer

参数:

destination - the array into which the bytes are to be written

返回:

this buffer

read

public DefaultDataBuffer read(byte[] destination,
 int offset,
 int length)

从接口复制的说明: DataBuffer

Read at most length bytes of this buffer into the specified destination, starting at the current reading position of this buffer.

指定者:

read 在接口中 DataBuffer

参数:

destination - the array into which the bytes are to be written

offset - the index within destination of the first byte to be written

length - the maximum number of bytes to be written in destination

返回:

this buffer

write

public DefaultDataBuffer write(byte b)

从接口复制的说明: DataBuffer

Write a single byte into this buffer at the current writing position.

指定者:

write 在接口中 DataBuffer

参数:

b - the byte to be written

返回:

this buffer

write

public DefaultDataBuffer write(byte[] source)

从接口复制的说明: DataBuffer

Write the given source into this buffer, starting at the current writing position of this buffer.

指定者:

write 在接口中 DataBuffer

参数:

source - the bytes to be written into this buffer

返回:

this buffer

write

public DefaultDataBuffer write(byte[] source,
 int offset,
 int length)

从接口复制的说明: DataBuffer

Write at most length bytes of the given source into this buffer, starting at the current writing position of this buffer.

指定者:

write 在接口中 DataBuffer

参数:

source - the bytes to be written into this buffer

offset - the index within source to start writing from

length - the maximum number of bytes to be written from source

返回:

this buffer

write

public DefaultDataBuffer write(DataBuffer... buffers)

从接口复制的说明: DataBuffer

Write one or more DataBuffers to this buffer, starting at the current writing position. It is the responsibility of the caller to release the given data buffers.

指定者:

write 在接口中 DataBuffer

参数:

buffers - the byte buffers to write into this buffer

返回:

this buffer

write

public DefaultDataBuffer write(ByteBuffer... buffers)

从接口复制的说明: DataBuffer

Write one or more ByteBuffer to this buffer, starting at the current writing position.

指定者:

write 在接口中 DataBuffer

参数:

buffers - the byte buffers to write into this buffer

返回:

this buffer

slice

public DefaultDataBuffer slice(int index,
 int length)

从接口复制的说明: DataBuffer

Create a new DataBuffer whose contents is a shared subsequence of this data buffer's content. Data between this data buffer and the returned buffer is shared; though changes in the returned buffer's position will not be reflected in the reading nor writing position of this data buffer.

Note that this method will not call DataBufferUtils.retain(DataBuffer) on the resulting slice: the reference count will not be increased.

指定者:

slice 在接口中 DataBuffer

参数:

index - the index at which to start the slice

length - the length of the slice

返回:

the specified slice of this data buffer

split

public DataBuffer split(int index)

从接口复制的说明: DataBuffer

Splits this data buffer into two at the given index.

Data that precedes the index will be returned in a new buffer, while this buffer will contain data that follows after index. Memory between the two buffers is shared, but independent and cannot overlap (unlike slice).

The read and write position of the returned buffer are truncated to fit within the buffers capacity if necessary. The positions of this buffer are set to 0 if they are smaller than index.

指定者:

split 在接口中 DataBuffer

参数:

index - the index at which it should be split

返回:

a new data buffer, containing the bytes from index 0 to index

asByteBuffer

public ByteBuffer asByteBuffer()

从接口复制的说明: DataBuffer

Expose this buffer's bytes as a ByteBuffer. Data between this DataBuffer and the returned ByteBuffer is shared; though changes in the returned buffer's position will not be reflected in the reading nor writing position of this data buffer.

指定者:

asByteBuffer 在接口中 DataBuffer

返回:

this data buffer as a byte buffer

asByteBuffer

public ByteBuffer asByteBuffer(int index,
 int length)

从接口复制的说明: DataBuffer

Expose a subsequence of this buffer's bytes as a ByteBuffer. Data between this DataBuffer and the returned ByteBuffer is shared; though changes in the returned buffer's position will not be reflected in the reading nor writing position of this data buffer.

指定者:

asByteBuffer 在接口中 DataBuffer

参数:

index - the index at which to start the byte buffer

length - the length of the returned byte buffer

返回:

this data buffer as a byte buffer

toByteBuffer

public ByteBuffer toByteBuffer(int index,
 int length)

从接口复制的说明: DataBuffer

Returns a ByteBuffer representation of a subsequence of this buffer's bytes. Data between this DataBuffer and the returned ByteBuffer is not shared.

指定者:

toByteBuffer 在接口中 DataBuffer

返回:

this data buffer as a byte buffer

toString

public String toString(int index,
 int length,
 Charset charset)

从接口复制的说明: DataBuffer

Return a part of this buffer's data as a String using the specified charset.

指定者:

toString 在接口中 DataBuffer

参数:

index - the index at which to start the string

length - the number of bytes to use for the string

charset - the charset to use

返回:

a string representation of a part of this buffers data

equals

public boolean equals(@Nullable
 Object other)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object