org.apache.solr.highlight
Class RegexFragmenter

java.lang.Object
  org.apache.solr.highlight.HighlightingPluginBase
      org.apache.solr.highlight.RegexFragmenter

All Implemented Interfaces:

SolrInfoMBean, SolrFragmenter, NamedListInitializedPlugin

public class RegexFragmenter
extends HighlightingPluginBase
implements SolrFragmenter

Fragmenter that tries to produce snippets that "look" like a regular expression. solrconfig.xml parameters:

• hl.regex.pattern: regular expression corresponding to "nice" fragments.
• hl.regex.slop: how far the fragmenter can stray from the ideal fragment size. A slop of 0.2 means that the fragmenter can go over or under by 20%.
• hl.regex.maxAnalyzedChars: how many characters to apply the regular expression to (independent from the global highlighter setting).

NOTE: the default for maxAnalyzedChars is much lower for this fragmenter. After this limit is exhausted, fragments are produced in the same way as GapFragmenter

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.solr.core.SolrInfoMBean

SolrInfoMBean.Category

Field Summary

protected Pattern	defaultPattern
protected String	defaultPatternRaw

Fields inherited from class org.apache.solr.highlight.HighlightingPluginBase

defaults, numRequests

Constructor Summary

RegexFragmenter()

Method Summary

String	getDescription() Simple one or two line description
Fragmenter	getFragmenter(String fieldName, SolrParams params) Return a Fragmenter appropriate for this field.
String	getSource() CVS Source, SVN Source, etc
void	init(NamedList args) init will be called just once, immediately after creation.

Methods inherited from class org.apache.solr.highlight.HighlightingPluginBase

getCategory, getDocs, getName, getStatistics, getVersion

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.solr.core.SolrInfoMBean

getCategory, getDocs, getName, getStatistics, getVersion

Field Detail

defaultPatternRaw

protected String defaultPatternRaw

defaultPattern

protected Pattern defaultPattern

Constructor Detail

RegexFragmenter

public RegexFragmenter()

Method Detail

init

public void init(NamedList args)

Description copied from interface: SolrFragmenter

init will be called just once, immediately after creation.

The args are user-level initialization parameters that may be specified when declaring a request handler in solrconfig.xml

Specified by:

init in interface SolrFragmenter

Specified by:

init in interface NamedListInitializedPlugin

Overrides:

init in class HighlightingPluginBase

getFragmenter

public Fragmenter getFragmenter(String fieldName,
                                SolrParams params)

Description copied from interface: SolrFragmenter

Return a Fragmenter appropriate for this field.

Specified by:

getFragmenter in interface SolrFragmenter

Parameters:

fieldName - The name of the field

params - The params controlling Highlighting

Returns:

An appropriate Fragmenter.

getDescription

public String getDescription()

Description copied from interface: SolrInfoMBean

Simple one or two line description

Specified by:

getDescription in interface SolrInfoMBean

Specified by:

getDescription in class HighlightingPluginBase

getSource

public String getSource()

Description copied from interface: SolrInfoMBean

CVS Source, SVN Source, etc

Specified by:

getSource in interface SolrInfoMBean

Specified by:

getSource in class HighlightingPluginBase