org.apache.lucene.search.uhighlight

Class BoundedBreakIteratorScanner

java.lang.Object

java.text.BreakIterator

org.apache.lucene.search.uhighlight.BoundedBreakIteratorScanner

All Implemented Interfaces:

java.lang.Cloneable

public class BoundedBreakIteratorScanner
extends java.text.BreakIterator

A custom break iterator that scans text to find break-delimited passages bounded by a provided maximum length. This class delegates the boundary search to a first level break iterator. When this break iterator finds a passage greater than the maximum length a secondary break iterator is used to re-split the passage at the first boundary after maximum length. This is useful to split passages created by BreakIterators like `sentence` that can create big outliers on semi-structured text. WARNING: This break iterator is designed to work with the UnifiedHighlighter.

Field Summary

Fields inherited from class java.text.BreakIterator

DONE

Method Summary

Modifier and Type	Method and Description
int	current()
int	first()
int	following(int offset) Can be invoked only after a call to preceding(offset+1).
static java.text.BreakIterator	getSentence(java.util.Locale locale, int maxLen) Returns a BreakIterator.getSentenceInstance(Locale) bounded to maxLen.
java.text.CharacterIterator	getText()
int	last()
int	next()
int	next(int n)
int	preceding(int offset) Must be called with increasing offset.
int	previous()
void	setText(java.text.CharacterIterator newText)
void	setText(java.lang.String newText)

Methods inherited from class java.text.BreakIterator

clone, getAvailableLocales, getCharacterInstance, getCharacterInstance, getLineInstance, getLineInstance, getSentenceInstance, getSentenceInstance, getWordInstance, getWordInstance, isBoundary

Methods inherited from class java.lang.Object

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

Method Detail

getText

public java.text.CharacterIterator getText()

Specified by:

getText in class java.text.BreakIterator

setText

public void setText(java.text.CharacterIterator newText)

Specified by:

setText in class java.text.BreakIterator

setText

public void setText(java.lang.String newText)

Overrides:

setText in class java.text.BreakIterator

preceding

public int preceding(int offset)

Must be called with increasing offset. See FieldHighlighter for usage.

Overrides:

preceding in class java.text.BreakIterator

following

public int following(int offset)

Can be invoked only after a call to preceding(offset+1). See FieldHighlighter for usage.

Specified by:

following in class java.text.BreakIterator

getSentence

public static java.text.BreakIterator getSentence(java.util.Locale locale,
                                                  int maxLen)

Returns a BreakIterator.getSentenceInstance(Locale) bounded to maxLen. Secondary boundaries are found using a BreakIterator.getWordInstance(Locale).

current

public int current()

Specified by:

current in class java.text.BreakIterator

first

public int first()

Specified by:

first in class java.text.BreakIterator

next

public int next()

Specified by:

next in class java.text.BreakIterator

last

public int last()

Specified by:

last in class java.text.BreakIterator

next

public int next(int n)

Specified by:

next in class java.text.BreakIterator

previous

public int previous()

Specified by:

previous in class java.text.BreakIterator