org.dromara.hutool.core.io.buffer

Class FastCharBuffer

java.lang.Object

org.dromara.hutool.core.io.buffer.FastBuffer

org.dromara.hutool.core.io.buffer.FastCharBuffer

All Implemented Interfaces:

Appendable, CharSequence

public class FastCharBuffer
extends FastBuffer
implements CharSequence, Appendable

代码移植自jetbrick
快速字符缓冲，将数据存放在缓冲集中，取代以往的单一数组
注意：此缓存在大量重复append时，性能比StringBuilder要好，但是toArray()性能很差

Author:

jetbrick, looly

Field Summary

Fields inherited from class org.dromara.hutool.core.io.buffer.FastBuffer

buffersCount, currentBufferIndex, minChunkLen, offset, size

Constructor Summary

Constructors

Constructor and Description
FastCharBuffer() 构造
FastCharBuffer(int size) 构造

Method Summary

Modifier and Type	Method and Description
FastCharBuffer	append(char element) 向快速缓冲加入一个字节
FastCharBuffer	append(char[] array) 向快速缓冲加入数据
FastCharBuffer	append(char[] array, int off, int len) 向快速缓冲加入数据
FastCharBuffer	append(CharSequence csq)
FastCharBuffer	append(CharSequence csq, int start, int end) Appends character sequence to buffer.
FastCharBuffer	append(FastCharBuffer buff) 将另一个快速缓冲加入到自身
FastCharBuffer	append(String string) 追加字符串
char[]	array(int index) 根据索引位返回缓冲集中的缓冲
char	charAt(int index)
protected void	ensureCapacity(int capacity) 检查现有缓冲区是否满足capacity，不满足则分配新的区域分配下一个缓冲区，不会小于1024
char	get(int index) 根据索引位返回一个字节
void	reset() 复位缓冲
CharSequence	subSequence(int start, int end)
char[]	toArray() 返回快速缓冲中的数据
char[]	toArray(int start, int len) 返回快速缓冲中的数据
char[]	toArrayZeroCopyIfPossible() 返回快速缓冲中的数据，如果缓冲区中的数据长度固定，则直接返回原始数组 注意此方法共享数组，不能修改数组内容！
String	toString()

Methods inherited from class org.dromara.hutool.core.io.buffer.FastBuffer

index, isEmpty, length, offset

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.CharSequence

chars, codePoints, length

Constructor Detail

FastCharBuffer

public FastCharBuffer()

构造

FastCharBuffer

public FastCharBuffer(int size)

构造

Parameters:

size - 一个缓冲区的最小字节数

Method Detail

append

public FastCharBuffer append(char[] array,
                             int off,
                             int len)

向快速缓冲加入数据

Parameters:

array - 数据

off - 偏移量

len - 字节数

Returns:

快速缓冲自身 @see FastByteBuffer

append

public FastCharBuffer append(char[] array)

向快速缓冲加入数据

Parameters:

array - 数据

Returns:

快速缓冲自身 @see FastByteBuffer

append

public FastCharBuffer append(char element)

向快速缓冲加入一个字节

Specified by:

append in interface Appendable

Parameters:

element - 一个字节的数据

Returns:

快速缓冲自身 @see FastByteBuffer

append

public FastCharBuffer append(FastCharBuffer buff)

将另一个快速缓冲加入到自身

Parameters:

buff - 快速缓冲

Returns:

快速缓冲自身 @see FastByteBuffer

array

public char[] array(int index)

根据索引位返回缓冲集中的缓冲

Parameters:

index - 索引位

Returns:

缓冲

reset

public void reset()

Description copied from class: FastBuffer

复位缓冲

Overrides:

reset in class FastBuffer

toArrayZeroCopyIfPossible

public char[] toArrayZeroCopyIfPossible()

返回快速缓冲中的数据，如果缓冲区中的数据长度固定，则直接返回原始数组
注意此方法共享数组，不能修改数组内容！

Returns:

快速缓冲中的数据

toArray

public char[] toArray()

返回快速缓冲中的数据

Returns:

快速缓冲中的数据

toArray

public char[] toArray(int start,
                      int len)

返回快速缓冲中的数据

Parameters:

start - 逻辑起始位置

len - 逻辑字节长

Returns:

快速缓冲中的数据

get

public char get(int index)

根据索引位返回一个字节

Parameters:

index - 索引位

Returns:

一个字节

toString

public String toString()

Specified by:

toString in interface CharSequence

Overrides:

toString in class Object

charAt

public char charAt(int index)

Specified by:

charAt in interface CharSequence

subSequence

public CharSequence subSequence(int start,
                                int end)

Specified by:

subSequence in interface CharSequence

append

public FastCharBuffer append(CharSequence csq)

Specified by:

append in interface Appendable

append

public FastCharBuffer append(CharSequence csq,
                             int start,
                             int end)

Appends character sequence to buffer.

Specified by:

append in interface Appendable

append

public FastCharBuffer append(String string)

追加字符串

Parameters:

string - String

Returns:

this

ensureCapacity

protected void ensureCapacity(int capacity)

Description copied from class: FastBuffer

检查现有缓冲区是否满足capacity，不满足则分配新的区域分配下一个缓冲区，不会小于1024

Specified by:

ensureCapacity in class FastBuffer

Parameters:

capacity - 理想缓冲区字节数