Package net.sf.saxon.regex

Class ARegularExpression

java.lang.Object

net.sf.saxon.regex.ARegularExpression

All Implemented Interfaces:

RegularExpression

public class ARegularExpression
extends Object
implements RegularExpression

Glue class to interface the Jakarta regex engine to Saxon (The prefix 'A' indicates an Apache regular expression, as distinct from a JDK regular expression).

Field Summary

Fields

Modifier and Type	Field	Description
(package private) String	rawFlags
(package private) UnicodeString	rawPattern
(package private) REProgram	regex

Constructor Summary

Constructors

Constructor	Description
ARegularExpression(CharSequence pattern, String flags, String hostLanguage, List<String> warnings, Configuration config)	Create and compile a regular expression

Method Summary

Modifier and Type	Method	Description
RegexIterator	analyze(CharSequence input)	Use this regular expression to analyze an input string, in support of the XSLT analyze-string instruction.
boolean	containsMatch(CharSequence input)	Determine whether the regular expression contains a match of a given string
String	getFlags()	Get the flags used at the time the regular expression was compiled.
boolean	matches(CharSequence input)	Determine whether the regular expression matches a given string in its entirety
CharSequence	replace(CharSequence input, CharSequence replacement)	Replace all substrings of a supplied input string that match the regular expression with a replacement string.
SequenceIterator<StringValue>	tokenize(CharSequence input)	Use this regular expression to tokenize an input string.

Methods inherited from class java.lang.Object

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

Field Detail

rawPattern

UnicodeString rawPattern

rawFlags

String rawFlags

regex

REProgram regex

Constructor Detail

ARegularExpression

public ARegularExpression(CharSequence pattern,
                          String flags,
                          String hostLanguage,
                          List<String> warnings,
                          Configuration config)
                   throws XPathException

Create and compile a regular expression

Parameters:

pattern - the regular expression

flags - the flags (ixsmq)

hostLanguage - one of "XP20", "XP30", "XSD10", "XSD11". Also allow combinations, e.g. "XP20/XSD11".

warnings - a list to be populated with any warnings arising during compilation of the regex

config - the Saxon Configuration: may be null

Throws:

XPathException - if the regular expression is invalid

Method Detail

matches

public boolean matches(CharSequence input)

Determine whether the regular expression matches a given string in its entirety

Specified by:

matches in interface RegularExpression

Parameters:

input - the string to match

Returns:

true if the string matches, false otherwise

containsMatch

public boolean containsMatch(CharSequence input)

Determine whether the regular expression contains a match of a given string

Specified by:

containsMatch in interface RegularExpression

Parameters:

input - the string to match

Returns:

true if the string matches, false otherwise

tokenize

public SequenceIterator<StringValue> tokenize(CharSequence input)

Use this regular expression to tokenize an input string.

Specified by:

tokenize in interface RegularExpression

Parameters:

input - the string to be tokenized

Returns:

a SequenceIterator containing the resulting tokens, as objects of type StringValue

analyze

public RegexIterator analyze(CharSequence input)

Use this regular expression to analyze an input string, in support of the XSLT analyze-string instruction. The resulting RegexIterator provides both the matching and non-matching substrings, and allows them to be distinguished. It also provides access to matched subgroups.

Specified by:

analyze in interface RegularExpression

Parameters:

input - the character string to be analyzed using the regular expression

Returns:

an iterator over matched and unmatched substrings

replace

public CharSequence replace(CharSequence input,
                            CharSequence replacement)
                     throws XPathException

Replace all substrings of a supplied input string that match the regular expression with a replacement string.

Specified by:

replace in interface RegularExpression

Parameters:

input - the input string on which replacements are to be performed

replacement - the replacement string in the format of the XPath replace() function

Returns:

the result of performing the replacement

Throws:

XPathException - if the replacement string is invalid

getFlags

public String getFlags()

Get the flags used at the time the regular expression was compiled.

Specified by:

getFlags in interface RegularExpression

Returns:

a string containing the flags