org.apache.solr.highlight

Class LuceneGapFragmenter

java.lang.Object

org.apache.lucene.search.highlight.SimpleFragmenter

org.apache.solr.highlight.LuceneGapFragmenter

All Implemented Interfaces:

org.apache.lucene.search.highlight.Fragmenter

class LuceneGapFragmenter
extends org.apache.lucene.search.highlight.SimpleFragmenter

A simple modification of SimpleFragmenter which additionally creates new fragments when an unusually-large position increment is encountered (this behaves much better in the presence of multi-valued fields).

Field Summary

Fields

Modifier and Type	Field and Description
protected int	fragOffset
static int	INCREMENT_THRESHOLD When a gap in term positions is observed that is at least this big, treat the gap as a fragment delimiter.
private org.apache.lucene.analysis.tokenattributes.OffsetAttribute	offsetAtt
private org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute	posIncAtt

Constructor Summary

Constructors

Constructor and Description
LuceneGapFragmenter()
LuceneGapFragmenter(int fragsize)

Method Summary

Modifier and Type	Method and Description
boolean	isNewFragment()
void	start(java.lang.String originalText, org.apache.lucene.analysis.TokenStream tokenStream)

Methods inherited from class org.apache.lucene.search.highlight.SimpleFragmenter

getFragmentSize, setFragmentSize

Methods inherited from class java.lang.Object

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

Field Detail

INCREMENT_THRESHOLD

public static final int INCREMENT_THRESHOLD

When a gap in term positions is observed that is at least this big, treat the gap as a fragment delimiter.

See Also:

Constant Field Values

fragOffset

protected int fragOffset

offsetAtt

private org.apache.lucene.analysis.tokenattributes.OffsetAttribute offsetAtt

posIncAtt

private org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute posIncAtt

Constructor Detail

LuceneGapFragmenter

public LuceneGapFragmenter()

LuceneGapFragmenter

public LuceneGapFragmenter(int fragsize)

Method Detail

start

public void start(java.lang.String originalText,
                  org.apache.lucene.analysis.TokenStream tokenStream)

Specified by:

start in interface org.apache.lucene.search.highlight.Fragmenter

Overrides:

start in class org.apache.lucene.search.highlight.SimpleFragmenter

isNewFragment

public boolean isNewFragment()

Specified by:

isNewFragment in interface org.apache.lucene.search.highlight.Fragmenter

Overrides:

isNewFragment in class org.apache.lucene.search.highlight.SimpleFragmenter