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 and Description
static int	DEFAULT_EXPANSION_BLOCK_SIZE
static int	DEFAULT_INITIAL_MAXIMUM_LENGTH

Constructor Summary

Constructors

Constructor and 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 and Description
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