java.lang.Object
- com.opensymphony.module.sitemesh.html.util.CharArray

```
public class CharArray
extends Object
```
A leaner, meaner version of StringBuffer.
It provides basic functionality to handle dynamically-growing char arrays as quickly as possible. This class is not threadsafe.

Author:

Chris Miller

Field Summary

Fields
Modifier and Type Field Description

(package private) char[] buffer

(package private) int size

(package private) int subStrLen

(package private) int subStrStart

Constructor Summary

Constructors
Constructor Description

CharArray(int size)
Constructs a CharArray that is initialized to the specified size.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`CharArray`	`append(char c)`	Appends a single character to the end of the character array.
`CharArray`	`append(char[] chars)`	Appends the supplied characters to the end of the array.
`CharArray`	`append(char[] chars, int position, int length)`
`CharArray`	`append(CharArray chars)`	Appends an existing CharArray on to this one.
`CharArray`	`append(String str)`	Appends the supplied string to the end of this character array.
`char`	`charAt(int pos)`	Returns the character that is at the specified position in the array.
`void`	`clear()`	Clear the contents.
`boolean`	`compareLower(String lowerStr, int offset)`	Compares the supplied uppercase string with the contents of the character array, starting at the offset specified.
`boolean`	`compareLowerSubstr(String lowerStr)`	This compares a substring of this character array (as specified by the `setSubstr(int, int)` method call) with the supplied string.
`String`	`getLowerSubstr()`	Returns the substring that was specified by the `setSubstr(int, int)` call.
`private void`	`grow(int minSize)`	Grows the internal array by either ~100% or minSize (whichever is larger), up to a maximum size of Integer.MAX_VALUE.
`int`	`length()`	Returns the current length of the character array.
`void`	`setLength(int newSize)`	Changes the size of the character array to the value specified.
`void`	`setSubstr(int begin, int end)`	Allows an arbitrary substring of this character array to be specified.
`int`	`substrHashCode()`	Returns the hashcode for a lowercase version of the array's substring (as set by the `setSubstr(int, int)` method).
`String`	`substring(int begin, int end)`	Returns a substring from within this character array.
`String`	`toString()`	Returns a String represenation of the character array.
`void`	`writeTo(PrintWriter writer)`

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

- Field Detail
  - size
```
int size
```
  - buffer
```
char[] buffer
```
  - subStrStart
```
int subStrStart
```
  - subStrLen
```
int subStrLen
```
- Constructor Detail
  - CharArray
```
public CharArray(int size)
```
    Constructs a CharArray that is initialized to the specified size. Do not pass in a negative value because there is no bounds checking!
- Method Detail
  - toString
```
public String toString()
```
    Returns a String represenation of the character array.
    
    Overrides:
    
    toString in class Object
  - charAt
```
public char charAt(int pos)
```
    Returns the character that is at the specified position in the array. There is no bounds checking on this method so be sure to pass in a sensible value.
  - setLength
```
public void setLength(int newSize)
```
    Changes the size of the character array to the value specified. If the new size is less than the current size, the data in the internal array will be truncated. If the new size is <= 0, the array will be reset to empty (but, unlike StringBuffer, the internal array will NOT be shrunk). If the new size is > the current size, the array will be padded out with null characters ('\u0000').
    
    Parameters:
    
    newSize - the new size of the character array
  - length
```
public int length()
```
    Returns the current length of the character array.
  - append
```
public CharArray append(CharArray chars)
```
    Appends an existing CharArray on to this one. Passing in a null CharArray will result in a NullPointerException.
  - append
```
public CharArray append(char[] chars)
```
    Appends the supplied characters to the end of the array.
  - append
```
public CharArray append(char[] chars,
                        int position,
                        int length)
```
  - append
```
public CharArray append(char c)
```
    Appends a single character to the end of the character array.
  - append
```
public CharArray append(String str)
```
    Appends the supplied string to the end of this character array. Passing in a null string will result in a NullPointerException.
  - substring
```
public String substring(int begin,
                        int end)
```
    Returns a substring from within this character array. Note that NO range checking is performed!
  - setSubstr
```
public void setSubstr(int begin,
                      int end)
```
    Allows an arbitrary substring of this character array to be specified. This method should be called prior to calling compareLowerSubstr(String) to set the range of the substring comparison.
    
    Parameters:
    
    begin - the starting offset into the character array.
    
    end - the ending offset into the character array.
  - getLowerSubstr
```
public String getLowerSubstr()
```
    Returns the substring that was specified by the setSubstr(int, int) call.
  - compareLowerSubstr
```
public boolean compareLowerSubstr(String lowerStr)
```
    This compares a substring of this character array (as specified by the setSubstr(int, int) method call) with the supplied string. The supplied string must be lowercase, otherwise the comparison will fail.
  - substrHashCode
```
public int substrHashCode()
```
    Returns the hashcode for a lowercase version of the array's substring (as set by the setSubstr(int, int) method). This uses the same calculation as the String.hashCode() method so that it remains compatible with the hashcodes of normal strings.
  - compareLower
```
public boolean compareLower(String lowerStr,
                            int offset)
```
    Compares the supplied uppercase string with the contents of the character array, starting at the offset specified. This is a specialized method to help speed up the FastPageParser slightly.
    The supplied string is assumed to contain only uppercase ASCII characters. The offset indicates the offset into the character array that the comparison should start from.
    If (and only if) the supplied string and the relevant portion of the character array are considered equal, this method will return true.
  - grow
```
private final void grow(int minSize)
```
    Grows the internal array by either ~100% or minSize (whichever is larger), up to a maximum size of Integer.MAX_VALUE.
  - clear
```
public final void clear()
```
    Clear the contents.
  - writeTo
```
public void writeTo(PrintWriter writer)
```

Modifier and Type	Field	Description
`(package private) char[]`	`buffer`
`(package private) int`	`size`
`(package private) int`	`subStrLen`
`(package private) int`	`subStrStart`

Class CharArray

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

size

buffer

subStrStart

subStrLen

Constructor Detail

CharArray

Method Detail

toString

charAt

setLength

length

append

append

append

append

append

substring

setSubstr

getLowerSubstr

compareLowerSubstr

substrHashCode

compareLower

grow

clear

writeTo