org.apache.solr.internal.csv
Class CharBuffer

java.lang.Object
  extended by org.apache.solr.internal.csv.CharBuffer

public class CharBuffer
extends Object

A simple StringBuffer replacement that aims to reduce copying as much as possible. The buffer grows as necessary. This class is not thread safe.


Constructor Summary
CharBuffer()
          Creates a new CharBuffer with an initial capacity of 32 characters.
CharBuffer(int length)
          Creates a new CharBuffer with an initial capacity of length characters.
 
Method Summary
 void append(char data)
          Appends a single character to the end of this CharBuffer.
 void append(char[] data)
          Appends data to the end of this CharBuffer.
 void append(CharBuffer cb)
          Appends the contents of cb to the end of this CharBuffer.
 void append(String s)
          Appends s to the end of this CharBuffer.
 void append(StringBuffer sb)
          Appends sb to the end of this CharBuffer.
 int capacity()
          Returns the current capacity of the buffer.
 char charAt(int pos)
          Returns the character at the specified position.
 void clear()
          Empties the buffer.
 char[] getCharacters()
          Returns the contents of the buffer as a char[].
 int length()
          Returns the number of characters in the buffer.
 void provideCapacity(int capacity)
          Copies the data into a new array of at least capacity size.
 void shrink()
          Shrinks the capacity of the buffer to the current length if necessary.
 String toString()
          Converts the contents of the buffer into a StringBuffer.
 void trimTrailingWhitespace()
          Removes trailing whitespace.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

CharBuffer

public CharBuffer()
Creates a new CharBuffer with an initial capacity of 32 characters.


CharBuffer

public CharBuffer(int length)
Creates a new CharBuffer with an initial capacity of length characters.

Method Detail

clear

public void clear()
Empties the buffer. The capacity still remains the same, so no memory is freed.


length

public int length()
Returns the number of characters in the buffer.

Returns:
the number of characters

capacity

public int capacity()
Returns the current capacity of the buffer.

Returns:
the maximum number of characters that can be stored in this buffer without resizing it.

append

public void append(CharBuffer cb)
Appends the contents of cb to the end of this CharBuffer.

Parameters:
cb - the CharBuffer to append or null

append

public void append(String s)
Appends s to the end of this CharBuffer. This method involves copying the new data once!

Parameters:
s - the String to append or null

append

public void append(StringBuffer sb)
Appends sb to the end of this CharBuffer. This method involves copying the new data once!

Parameters:
sb - the StringBuffer to append or null

append

public void append(char[] data)
Appends data to the end of this CharBuffer. This method involves copying the new data once!

Parameters:
data - the char[] to append or null

append

public void append(char data)
Appends a single character to the end of this CharBuffer. This method involves copying the new data once!

Parameters:
data - the char to append

shrink

public void shrink()
Shrinks the capacity of the buffer to the current length if necessary. This method involves copying the data once!


trimTrailingWhitespace

public void trimTrailingWhitespace()
Removes trailing whitespace.


getCharacters

public char[] getCharacters()
Returns the contents of the buffer as a char[]. The returned array may be the internal array of the buffer, so the caller must take care when modifying it. This method allows to avoid copying if the caller knows the exact capacity before.


charAt

public char charAt(int pos)
Returns the character at the specified position.


toString

public String toString()
Converts the contents of the buffer into a StringBuffer. This method involves copying the new data once!

Overrides:
toString in class Object

provideCapacity

public void provideCapacity(int capacity)
Copies the data into a new array of at least capacity size.



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