java.lang.Object
- org.apache.tomcat.util.buf.AbstractChunk
- - org.apache.tomcat.util.buf.CharChunk

All Implemented Interfaces:

java.io.Serializable, java.lang.CharSequence, java.lang.Cloneable
```
public final class CharChunk
extends AbstractChunk
implements java.lang.CharSequence
```
Utilities to manipulate char chunks. While String is the easiest way to manipulate chars ( search, substrings, etc), it is known to not be the most efficient solution - Strings are designed as immutable and secure objects.

Author:

dac@sun.com, James Todd [gonzo@sun.com], Costin Manolache, Remy Maucherat

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static interface`	`CharChunk.CharInputChannel`	Input interface, used when the buffer is empty.
`static interface`	`CharChunk.CharOutputChannel`	When we need more space we'll either grow the buffer ( up to the limit ) or send it to a channel.

Field Summary
- Fields inherited from class org.apache.tomcat.util.buf.AbstractChunk
  ARRAY_MAX_SIZE, end, hasHashCode, isSet, sm, start

Constructor Summary

Constructors
Constructor Description

CharChunk()
Creates a new, uninitialized CharChunk object.

CharChunk(int initial)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`allocate(int initial, int limit)`
`void`	`append(char c)`
`void`	`append(char[] src, int off, int len)`	Add data to the buffer.
`void`	`append(java.lang.String s)`	Append a string to the buffer.
`void`	`append(java.lang.String s, int off, int len)`	Append a string to the buffer.
`void`	`append(CharChunk src)`
`char`	`charAt(int index)`
`java.lang.Object`	`clone()`
`boolean`	`endsWith(java.lang.String s)`
`boolean`	`equals(char[] b2, int off2, int len2)`
`boolean`	`equals(java.lang.Object obj)`
`boolean`	`equals(java.lang.String s)`	Compares the message bytes to the specified String object.
`boolean`	`equals(CharChunk cc)`
`boolean`	`equalsIgnoreCase(java.lang.String s)`	Compares the message bytes to the specified String object.
`void`	`flushBuffer()`	Send the buffer to the sink.
`char[]`	`getBuffer()`
`protected int`	`getBufferElement(int index)`
`char[]`	`getChars()`
`int`	`indexOf(char c)`
`static int`	`indexOf(char[] chars, int start, int end, char s)`	Returns the first instance of the given character in the given char array between the specified start and end.
`int`	`indexOf(char c, int starting)`	Returns the first instance of the given character in this CharChunk starting at the specified char.
`int`	`length()`
`void`	`makeSpace(int count)`	Make space for len chars.
`void`	`setCharInputChannel(CharChunk.CharInputChannel in)`	When the buffer is empty, read the data from the input channel.
`void`	`setCharOutputChannel(CharChunk.CharOutputChannel out)`	When the buffer is full, write the data to the output channel.
`void`	`setChars(char[] c, int off, int len)`	Sets the buffer to the specified subarray of characters.
`boolean`	`startsWith(java.lang.String s)`
`boolean`	`startsWithIgnoreCase(java.lang.String s, int pos)`	Returns true if the buffer starts with the specified string.
`java.lang.CharSequence`	`subSequence(int start, int end)`
`int`	`subtract()`
`int`	`subtract(char[] dest, int off, int len)`
`java.lang.String`	`toString()`
`java.lang.String`	`toStringInternal()`

Methods inherited from class org.apache.tomcat.util.buf.AbstractChunk
getEnd, getLength, getLimit, getLimitInternal, getOffset, getStart, hash, hashCode, indexOf, isNull, recycle, setEnd, setLimit, setOffset

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.CharSequence
chars, codePoints

- Constructor Detail
  - CharChunk
```
public CharChunk()
```
    Creates a new, uninitialized CharChunk object.
  - CharChunk
```
public CharChunk(int initial)
```
- Method Detail
  - clone
```
public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
```
    Overrides:
    
    clone in class java.lang.Object
    
    Throws:
    
    java.lang.CloneNotSupportedException
  - allocate
```
public void allocate(int initial,
                     int limit)
```
  - setChars
```
public void setChars(char[] c,
                     int off,
                     int len)
```
    Sets the buffer to the specified subarray of characters.
    
    Parameters:
    
    c - the characters
    
    off - the start offset of the characters
    
    len - the length of the characters
  - getChars
```
public char[] getChars()
```
    Returns:
    
    the buffer.
  - getBuffer
```
public char[] getBuffer()
```
    Returns:
    
    the buffer.
  - setCharInputChannel
```
public void setCharInputChannel(CharChunk.CharInputChannel in)
```
    When the buffer is empty, read the data from the input channel.
    
    Parameters:
    
    in - The input channel
  - setCharOutputChannel
```
public void setCharOutputChannel(CharChunk.CharOutputChannel out)
```
    When the buffer is full, write the data to the output channel. Also used when large amount of data is appended. If not set, the buffer will grow to the limit.
    
    Parameters:
    
    out - The output channel
  - append
```
public void append(char c)
            throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - append
```
public void append(CharChunk src)
            throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - append
```
public void append(char[] src,
                   int off,
                   int len)
            throws java.io.IOException
```
    Add data to the buffer.
    
    Parameters:
    
    src - Char array
    
    off - Offset
    
    len - Length
    
    Throws:
    
    java.io.IOException - Writing overflow data to the output channel failed
  - append
```
public void append(java.lang.String s)
            throws java.io.IOException
```
    Append a string to the buffer.
    
    Parameters:
    
    s - The string
    
    Throws:
    
    java.io.IOException - Writing overflow data to the output channel failed
  - append
```
public void append(java.lang.String s,
                   int off,
                   int len)
            throws java.io.IOException
```
    Append a string to the buffer.
    
    Parameters:
    
    s - The string
    
    off - Offset
    
    len - Length
    
    Throws:
    
    java.io.IOException - Writing overflow data to the output channel failed
  - subtract
```
public int subtract()
             throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - subtract
```
public int subtract(char[] dest,
                    int off,
                    int len)
             throws java.io.IOException
```
    Throws:
    
    java.io.IOException
  - flushBuffer
```
public void flushBuffer()
                 throws java.io.IOException
```
    Send the buffer to the sink. Called by append() when the limit is reached. You can also call it explicitly to force the data to be written.
    
    Throws:
    
    java.io.IOException - Writing overflow data to the output channel failed
  - makeSpace
```
public void makeSpace(int count)
```
    Make space for len chars. If len is small, allocate a reserve space too. Never grow bigger than the limit or AbstractChunk.ARRAY_MAX_SIZE.
    
    Parameters:
    
    count - The size
  - toString
```
public java.lang.String toString()
```
    Specified by:
    
    toString in interface java.lang.CharSequence
    
    Overrides:
    
    toString in class java.lang.Object
  - toStringInternal
```
public java.lang.String toStringInternal()
```
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Overrides:
    
    equals in class java.lang.Object
  - equals
```
public boolean equals(java.lang.String s)
```
    Compares the message bytes to the specified String object.
    
    Parameters:
    
    s - the String to compare
    
    Returns:
    
    true if the comparison succeeded, false otherwise
  - equalsIgnoreCase
```
public boolean equalsIgnoreCase(java.lang.String s)
```
    Compares the message bytes to the specified String object.
    
    Parameters:
    
    s - the String to compare
    
    Returns:
    
    true if the comparison succeeded, false otherwise
  - equals
```
public boolean equals(CharChunk cc)
```
  - equals
```
public boolean equals(char[] b2,
                      int off2,
                      int len2)
```
  - startsWith
```
public boolean startsWith(java.lang.String s)
```
    Parameters:
    
    s - The string
    
    Returns:
    
    true if the message bytes starts with the specified string.
  - startsWithIgnoreCase
```
public boolean startsWithIgnoreCase(java.lang.String s,
                                    int pos)
```
    Returns true if the buffer starts with the specified string.
    
    Parameters:
    
    s - the string
    
    pos - The position
    
    Returns:
    
    true if the start matches
  - endsWith
```
public boolean endsWith(java.lang.String s)
```
    Parameters:
    
    s - The string
    
    Returns:
    
    true if the message bytes end with the specified string.
  - getBufferElement
```
protected int getBufferElement(int index)
```
    Specified by:
    
    getBufferElement in class AbstractChunk
  - indexOf
```
public int indexOf(char c)
```
  - indexOf
```
public int indexOf(char c,
                   int starting)
```
    Returns the first instance of the given character in this CharChunk starting at the specified char. If the character is not found, -1 is returned.
    
    Parameters:
    
    c - The character
    
    starting - The start position
    
    Returns:
    
    The position of the first instance of the character or -1 if the character is not found.
  - indexOf
```
public static int indexOf(char[] chars,
                          int start,
                          int end,
                          char s)
```
    Returns the first instance of the given character in the given char array between the specified start and end.
    
    Parameters:
    
    chars - The array to search
    
    start - The point to start searching from in the array
    
    end - The point to stop searching in the array
    
    s - The character to search for
    
    Returns:
    
    The position of the first instance of the character or -1 if the character is not found.
  - charAt
```
public char charAt(int index)
```
    Specified by:
    
    charAt in interface java.lang.CharSequence
  - subSequence
```
public java.lang.CharSequence subSequence(int start,
                                          int end)
```
    Specified by:
    
    subSequence in interface java.lang.CharSequence
  - length
```
public int length()
```
    Specified by:
    
    length in interface java.lang.CharSequence

Constructor	Description
`CharChunk()`	Creates a new, uninitialized CharChunk object.
`CharChunk(int initial)`

Class CharChunk

Nested Class Summary

Field Summary

Fields inherited from class org.apache.tomcat.util.buf.AbstractChunk

Constructor Summary

Method Summary

Methods inherited from class org.apache.tomcat.util.buf.AbstractChunk

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.CharSequence

Constructor Detail

CharChunk

CharChunk

Method Detail

clone

allocate

setChars

getChars

getBuffer

setCharInputChannel

setCharOutputChannel

append

append

append

append

append

subtract

subtract

flushBuffer

makeSpace

toString

toStringInternal

equals

equals

equalsIgnoreCase

equals

equals

startsWith

startsWithIgnoreCase

endsWith

getBufferElement

indexOf

indexOf

indexOf

charAt

subSequence

length