Package org.apache.bval.jsr.util

Class LookBehindRegexHolder

java.lang.Object

org.apache.bval.jsr.util.LookBehindRegexHolder

public class LookBehindRegexHolder
extends Object

Utility class to manage regular expressions that require simulated infinite lookbehind, e.g. to determine whether a sequence of escape characters is complete unto itself.

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_EXPANSION_BLOCK_SIZE
static int	DEFAULT_INITIAL_MAXIMUM_LENGTH

Constructor Summary

Constructors

Constructor	Description
LookBehindRegexHolder(String regex, int initialMaximumLength, int expansionBlockSize, IntUnaryOperator computeInjectedRepetition)	Create a new LookBehindRegexHolder instance.
LookBehindRegexHolder(String regex, IntUnaryOperator computeInjectedRepetition)	Create a new LookBehindRegexHolder instance with the default initial maximum length and expansion block size.

Method Summary

Modifier and Type	Method	Description
(package private) int	getMaximumLength()
(package private) String	getPattern()
Matcher	matcher(CharSequence s)	Get a Matcher against the specified CharSequence.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_INITIAL_MAXIMUM_LENGTH

public static final int DEFAULT_INITIAL_MAXIMUM_LENGTH

See Also:

Constant Field Values

DEFAULT_EXPANSION_BLOCK_SIZE

public static final int DEFAULT_EXPANSION_BLOCK_SIZE

See Also:

Constant Field Values

Constructor Detail

LookBehindRegexHolder

public LookBehindRegexHolder(String regex,
                             IntUnaryOperator computeInjectedRepetition)

Create a new LookBehindRegexHolder instance with the default initial maximum length and expansion block size.

Parameters:

regex - assumed to contain a %d Java format sequence

computeInjectedRepetition - function to compute the injected number of repetitions to inject at %d in regex

LookBehindRegexHolder

public LookBehindRegexHolder(String regex,
                             int initialMaximumLength,
                             int expansionBlockSize,
                             IntUnaryOperator computeInjectedRepetition)

Create a new LookBehindRegexHolder instance.

Parameters:

regex - assumed to contain a %d Java format sequence

initialMaximumLength - initial guess

expansionBlockSize - number of bytes by which to increase the maximum length when a Matcher is requested for a larger message size

computeInjectedRepetition - function to compute the injected number of repetitions to inject at %d in regex

Method Detail

matcher

public Matcher matcher(CharSequence s)

Get a Matcher against the specified CharSequence.

Parameters:

s -

Returns:

Matcher

getMaximumLength

int getMaximumLength()

getPattern

String getPattern()