Package org.apache.solr.highlight

Class RegexFragmenter

java.lang.Object
org.apache.solr.highlight.HighlightingPluginBase
org.apache.solr.highlight.RegexFragmenter
All Implemented Interfaces:
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

  • Field Details

    • defaultPatternRaw

      protected String defaultPatternRaw

    • defaultPattern

      protected Pattern defaultPattern

  • Constructor Details

    • RegexFragmenter

      public RegexFragmenter()

  • Method Details

    • init

      public void init(org.apache.solr.common.util.NamedList<?> args)
      Description copied from interface: NamedListInitializedPlugin
      init will be called just once, immediately after creation.

      Source of the initialization arguments will typically be solrconfig.xml, but will ultimately depends on the plugin itself

      Specified by:
      init in interface NamedListInitializedPlugin
      Overrides:
      init in class HighlightingPluginBase
      Parameters:
      args - non-null list of initialization parameters (may be empty)

    • getFragmenter

      public org.apache.lucene.search.highlight.Fragmenter getFragmenter(String fieldName, org.apache.solr.common.params.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.