org.owasp.esapi.codecs
Class PushbackString

java.lang.Object
  org.owasp.esapi.codecs.PushbackString

public class PushbackString
extends Object

The pushback string is used by Codecs to allow them to push decoded characters back onto a string for further decoding. This is necessary to detect double-encoding.

Since:

June 1, 2007

Author:

Jeff Williams (jeff.williams .at. aspectsecurity.com) Aspect Security

See Also:

Encoder

Constructor Summary

PushbackString(String input)

Method Summary

boolean	hasNext()
int	index() Get the current index of the PushbackString.
static boolean	isHexDigit(Character c) Returns true if the parameter character is a hexidecimal digit 0 through 9, a through f, or A through F.
static boolean	isOctalDigit(Character c) Returns true if the parameter character is an octal digit 0 through 7.
void	mark()
Character	next()
Character	nextHex()
Character	nextOctal()
Character	peek() Return the next character without affecting the current index.
boolean	peek(char c) Test to see if the next character is a particular value without affecting the current index.
void	pushback(Character c)
protected String	remainder()
void	reset()

Methods inherited from class java.lang.Object

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

Constructor Detail

PushbackString

public PushbackString(String input)

Parameters:

input -

Method Detail

pushback

public void pushback(Character c)

Parameters:

c -

index

public int index()

Get the current index of the PushbackString. Typically used in error messages.

Returns:

The current index of the PushbackString.

hasNext

public boolean hasNext()

Returns:

next

public Character next()

Returns:

nextHex

public Character nextHex()

Returns:

nextOctal

public Character nextOctal()

Returns:

isHexDigit

public static boolean isHexDigit(Character c)

Returns true if the parameter character is a hexidecimal digit 0 through 9, a through f, or A through F.

Parameters:

c -

Returns:

isOctalDigit

public static boolean isOctalDigit(Character c)

Returns true if the parameter character is an octal digit 0 through 7.

Parameters:

c -

Returns:

peek

public Character peek()

Return the next character without affecting the current index.

Returns:

peek

public boolean peek(char c)

Test to see if the next character is a particular value without affecting the current index.

Parameters:

c -

Returns:

mark

public void mark()

reset

public void reset()

remainder

protected String remainder()

Returns: