net.sf.saxon.regex

Class Operation.OpReluctantFixed

java.lang.Object

net.sf.saxon.regex.Operation

net.sf.saxon.regex.Operation.OpRepeat

net.sf.saxon.regex.Operation.OpReluctantFixed

Enclosing class:

Operation

public static class Operation.OpReluctantFixed
extends Operation.OpRepeat

Handle a reluctant repetition (with possible min and max) where the size of the repeated unit is fixed.

Nested Class Summary

Nested classes/interfaces inherited from class net.sf.saxon.regex.Operation

Operation.OpAtom, Operation.OpBackReference, Operation.OpBOL, Operation.OpCapture, Operation.OpCharClass, Operation.OpChoice, Operation.OpEndProgram, Operation.OpEOL, Operation.OpGreedyFixed, Operation.OpNothing, Operation.OpReluctantFixed, Operation.OpRepeat, Operation.OpSequence, Operation.OpTrace, Operation.OpUnambiguousRepeat

Field Summary

Fields inherited from class net.sf.saxon.regex.Operation.OpRepeat

greedy, max, min, op

Constructor Summary

Constructors

Constructor and Description
OpReluctantFixed(Operation op, int min, int max, int len)

Method Summary

Modifier and Type	Method and Description
int	getMatchLength() Get the length of the matches returned by this operation if they are fixed-length
IntIterator	iterateMatches(REMatcher matcher, int position) Get an iterator returning all the matches for this operation
boolean	matchesEmptyString() Ask whether the regular expression is capable of matching a zero-length string
Operation	optimize(REProgram program, REFlags flags) Optimize the operation

Methods inherited from class net.sf.saxon.regex.Operation.OpRepeat

containsCapturingExpressions, display, getInitialCharacterClass, getMinimumMatchLength, getRepeatedOperation

Methods inherited from class java.lang.Object

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

Constructor Detail

OpReluctantFixed

public OpReluctantFixed(Operation op,
                        int min,
                        int max,
                        int len)

Method Detail

getMatchLength

public int getMatchLength()

Description copied from class: Operation

Get the length of the matches returned by this operation if they are fixed-length

Overrides:

getMatchLength in class Operation.OpRepeat

Returns:

the length of the matches, or -1 if the length is variable

matchesEmptyString

public boolean matchesEmptyString()

Description copied from class: Operation

Ask whether the regular expression is capable of matching a zero-length string

Overrides:

matchesEmptyString in class Operation.OpRepeat

Returns:

true if the regex matches a zero-length string

optimize

public Operation optimize(REProgram program,
                          REFlags flags)

Description copied from class: Operation

Optimize the operation

Overrides:

optimize in class Operation.OpRepeat

Parameters:

program - the program being optimized

flags - the regular expression flags

Returns:

the optimized operation

iterateMatches

public IntIterator iterateMatches(REMatcher matcher,
                                  int position)

Description copied from class: Operation

Get an iterator returning all the matches for this operation

Overrides:

iterateMatches in class Operation.OpRepeat

Parameters:

matcher - supplies the context for the matching; may be updated with information about captured groups

position - the start position to seek a match

Returns:

an iterator returning the endpoints of all matches starting at the supplied position