Package org.htmlunit.javascript.regexp

Class RegExpJsToJavaConverter

java.lang.Object

org.htmlunit.javascript.regexp.RegExpJsToJavaConverter

public class RegExpJsToJavaConverter
extends Object

Translates JavaScript RegExp to Java RegExp.
// [...\b...] to [...\cH...] // [...[...] to [...\[...] // [^\\1] to . // back reference in character classes are simply ignored by browsers [...ab\5cd...] to [...abcd...] // characters escaped without need should be "un-escaped" Escape curly braces that are not used in an expression like "{n}", "{n,}" or "{n,m}" (where n and m are positive integers).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	RegExpJsToJavaConverter.Subexpresion
private static class	RegExpJsToJavaConverter.Tape	Helper to encapsulate the transformations.

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	DIGITS
private boolean	insideCharClass_
private boolean	insideRepetition_
private Deque<RegExpJsToJavaConverter.Subexpresion>	parsingSubexpressions_
private List<RegExpJsToJavaConverter.Subexpresion>	subexpressions_
private RegExpJsToJavaConverter.Tape	tape_
private static final HashMap<String,String>	UNICODE_ESCAPES

Constructor Summary

Constructors

Constructor	Description
RegExpJsToJavaConverter()	Initiate the FSM.

Method Summary

Modifier and Type	Method	Description
String	convert(String input)	Run the state machine on a given input string.
private boolean	handleBackReferenceOrOctal(int aFirstChar)
private void	processCharClassEnd()
private void	processCharClassStart()
private void	processEscapeSequence()
private void	processRepetitionEnd()
private void	processRepetitionStart()
private void	processSubExpressionEnd()
private void	processSubExpressionStart()

Methods inherited from class java.lang.Object

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

Field Details

DIGITS

private static final String DIGITS

See Also:

• Constant Field Values

UNICODE_ESCAPES

private static final HashMap<String,String> UNICODE_ESCAPES

tape_

private RegExpJsToJavaConverter.Tape tape_

insideCharClass_

private boolean insideCharClass_

insideRepetition_

private boolean insideRepetition_

parsingSubexpressions_

private Deque<RegExpJsToJavaConverter.Subexpresion> parsingSubexpressions_

subexpressions_

private List<RegExpJsToJavaConverter.Subexpresion> subexpressions_

Constructor Details

RegExpJsToJavaConverter

public RegExpJsToJavaConverter()

Initiate the FSM.

Method Details

convert

public String convert(String input)

Run the state machine on a given input string.

Parameters:

input - the js regexp to process

Returns:

a valid java regex pattern

processCharClassStart

private void processCharClassStart()

processCharClassEnd

private void processCharClassEnd()

processRepetitionStart

private void processRepetitionStart()

processRepetitionEnd

private void processRepetitionEnd()

processSubExpressionStart

private void processSubExpressionStart()

processSubExpressionEnd

private void processSubExpressionEnd()

processEscapeSequence

private void processEscapeSequence()

handleBackReferenceOrOctal

private boolean handleBackReferenceOrOctal(int aFirstChar)