Package net.sf.saxon.regex

This package contains the code to map XML Schema and XPath regular expressions to a regular expression engine of the underlying Java platform.

See: Description

Interface Summary

Interface	Description
RegexIterator	This interface defines an iterator that supports the evaluation of xsl:analyze-string.
RegexIterator.MatchHandler	Interface defining a call-back action for processing captured groups
RegularExpression	This interface represents a compiled regular expression.

Class Summary

Class	Description
ARegexIterator	Class ARegexIterator - provides an iterator over matched and unmatched substrings.
ARegularExpression	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).
ATokenIterator	A ATokenIterator is an iterator over the strings that result from tokenizing a string using a regular expression
BMPString	An implementation of UnicodeString optimized for strings that contain no characters outside the BMP (i.e.
Capture	Represents a match of a captured subgroup
CaseVariants	This class holds data about the case-variants of Unicode characters.
GeneralUnicodeString	A Unicode string which, in general, may contain non-BMP characters (that is, codepoints outside the range 0-65535)
History	The History object is used to avoid backtracking too far.
JavaRegularExpression	An implementation of RegularExpression that calls the JDK regular expression library directly.
JRegexIterator	Class JRegexIterator - provides an iterator over matched and unmatched substrings.
JTokenIterator	A JTokenIterator is an iterator over the strings that result from tokenizing a string using a regular expression, in this case a regular expression evaluated using the JDK regex engine
LatinString	An implementation of UnicodeString optimized for strings that contain no characters outside the Latin-1 range (i.e.
Operation	Represents an operation or instruction in the regular expression program.
Operation.OpAtom	A match against a fixed string of any length
Operation.OpBackReference	Back-reference
Operation.OpBOL	Beginning of Line (^)
Operation.OpCapture	Open paren (captured group)
Operation.OpCharClass	A match of a single character in the input against a set of permitted characters
Operation.OpChoice	A choice of several branches
Operation.OpEndProgram	End of program
Operation.OpEOL	End of Line ($)
Operation.OpGreedyFixed	Handle a greedy repetition (with possible min and max) where the size of the repeated unit is fixed.
Operation.OpNothing	Match empty string
Operation.OpReluctantFixed	Handle a reluctant repetition (with possible min and max) where the size of the repeated unit is fixed.
Operation.OpRepeat	Handle a greedy repetition (with possible min and max) where the size of the repeated unit is variable.
Operation.OpSequence	A sequence of multiple pieces
Operation.OpTrace	Operation that wraps a base operation and traces its execution
Operation.OpUnambiguousRepeat	Handle a repetition where there is no ambiguity; if the repeated term is matched in the string, then it cannot match anything other than the repeated term.
RECompiler	A regular expression compiler class.
REFlags	Class representing a set of regular expression flags (some combination of i, m, s, x, q).
RegexPrecondition	A precondition that must be true if a regular expression is to match
REMatcher	RE is an efficient, lightweight regular expression evaluator/matcher class.
REMatcher.State
REProgram	A class that holds compiled regular expressions.
UnicodeBlocks	This class provides knowledge of the names and contents of Unicode character blocks, as referenced using the \p{IsXXXXX} construct in a regular expression.
UnicodeString	An abstract class that efficiently handles Unicode strings including non-BMP characters; it has three subclasses, respectively handling strings whose maximum character code is 255, 65535, or 1114111.

Exception Summary

Exception	Description
RESyntaxException	Exception thrown to indicate a syntax error in a regular expression.

Package net.sf.saxon.regex Description

This package contains the code to map XML Schema and XPath regular expressions to a regular expression engine of the underlying Java platform.

Most of the classes implement a regular expression derived from Apache's Jakarta project. The code of Jakarta has been modified so that the regular expressions implement the syntax of XSD/XPath regular expressions.

In addition, there are classes to provide direct access to the native JDK regular expression engine. The flags value ";j" may be used to select this engine. The resulting syntax/semantics will not be an exact match to the XPath definition.

Users should not normally need to use these classes directly.

Earlier versions of Saxon included a translator from XPath regular expressions to Java regular expressions, based on that produced by James Clark. This mechanism is no longer used.