net.sf.saxon.java
Class JRegexIterator

java.lang.Object
  net.sf.saxon.java.JRegexIterator

All Implemented Interfaces:

SequenceIterator, RegexIterator

public class JRegexIterator
extends Object
implements RegexIterator

Class JRegexIterator - provides an iterator over matched and unmatched substrings. This implementation of RegexIterator uses the JDK regular expression engine.

Field Summary

Fields inherited from interface net.sf.saxon.om.SequenceIterator

GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD

Constructor Summary

JRegexIterator(String string, Pattern pattern)
Construct a RegexIterator.

Method Summary

Item	current() Get the current item in the sequence
SequenceIterator	getAnother() Get another iterator over the same items
int	getProperties() Get properties of this iterator, as a bit-significant integer.
String	getRegexGroup(int number) Get a substring that matches a parenthesised group within the regular expression
SequenceIterator	getRegexGroupIterator() Get a sequence containing all the regex groups (except group 0, because we want to use indexing from 1).
boolean	isMatching() Determine whether the current item is a matching item or a non-matching item
Item	next() Get the next item in the sequence
int	position() Get the position of the current item in the sequence

Methods inherited from class java.lang.Object

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

Constructor Detail

JRegexIterator

public JRegexIterator(String string,
                      Pattern pattern)

Construct a RegexIterator. Note that the underlying matcher.find() method is called once to obtain each matching substring. But the iterator also returns non-matching substrings if these appear between the matching substrings.

Parameters:

string - the string to be analysed

pattern - the regular expression

Method Detail

next

public Item next()

Get the next item in the sequence

Specified by:

next in interface SequenceIterator

Returns:

the next item in the sequence

current

public Item current()

Get the current item in the sequence

Specified by:

current in interface SequenceIterator

Returns:

the item most recently returned by next()

position

public int position()

Get the position of the current item in the sequence

Specified by:

position in interface SequenceIterator

Returns:

the position of the item most recently returned by next(), starting at 1

getAnother

public SequenceIterator getAnother()

Get another iterator over the same items

Specified by:

getAnother in interface SequenceIterator

Returns:

a new iterator, positioned before the first item

getProperties

public int getProperties()

Get properties of this iterator, as a bit-significant integer.

Specified by:

getProperties in interface SequenceIterator

Returns:

the properties of this iterator. This will be some combination of properties such as SequenceIterator.GROUNDED, SequenceIterator.LAST_POSITION_FINDER, and SequenceIterator.LOOKAHEAD. It is always acceptable to return the value zero, indicating that there are no known special properties. It is acceptable for the properties of the iterator to change depending on its state.

isMatching

public boolean isMatching()

Determine whether the current item is a matching item or a non-matching item

Specified by:

isMatching in interface RegexIterator

Returns:

true if the current item (the one most recently returned by next()) is an item that matches the regular expression, or false if it is an item that does not match

getRegexGroup

public String getRegexGroup(int number)

Get a substring that matches a parenthesised group within the regular expression

Specified by:

getRegexGroup in interface RegexIterator

Parameters:

number - the number of the group to be obtained

Returns:

the substring of the current item that matches the n'th parenthesized group within the regular expression

getRegexGroupIterator

public SequenceIterator getRegexGroupIterator()

Get a sequence containing all the regex groups (except group 0, because we want to use indexing from 1). This is used by the saxon:analyze-string() higher-order extension function.

Specified by:

getRegexGroupIterator in interface RegexIterator