org.apache.solr.highlight
Class PostingsSolrHighlighter

java.lang.Object
  org.apache.solr.highlight.SolrHighlighter
      org.apache.solr.highlight.PostingsSolrHighlighter

All Implemented Interfaces:

PluginInfoInitialized

public class PostingsSolrHighlighter
extends SolrHighlighter
implements PluginInfoInitialized

Highlighter impl that uses PostingsHighlighter

Example configuration:

   <searchComponent class="solr.HighlightComponent" name="highlight">
     <highlighting class="org.apache.solr.highlight.PostingsSolrHighlighter"
                      preTag="&lt;em&gt;"
                      postTag="&lt;/em&gt;"
                      ellipsis="... "
                      maxLength=10000/>
   </searchComponent>
 

Notes:

• fields to highlight must be configured with storeOffsetsWithPositions="true"
• hl.fl specifies the field list.
• hl.snippets specifies how many underlying sentence fragments form the resulting snippet.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

protected PostingsHighlighter

highlighter

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

boundaryScanners, encoders, formatters, fragListBuilders, fragmenters, fragmentsBuilders, log

Constructor Summary

PostingsSolrHighlighter()

Method Summary

NamedList<Object>	doHighlighting(DocList docs, Query query, SolrQueryRequest req, String[] defaultFields) Generates a list of Highlighted query fragments for each item in a list of documents, or returns null if highlighting is disabled.
protected NamedList<Object>	encodeSnippets(String[] keys, String[] fieldNames, Map<String,String[]> snippets) Encodes the resulting snippets into a namedlist
protected String[]	getUniqueKeys(SolrIndexSearcher searcher, TopDocs topDocs) Retrieves the unique keys for the topdocs to key the results
void	init(PluginInfo info)
void	initalize(SolrConfig config)
protected TopDocs	toTopDocs(DocList docs) Converts solr's DocList to a lucene TopDocs

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

emptyArray, getHighlightFields, isHighlightingEnabled

Methods inherited from class java.lang.Object

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

Field Detail

highlighter

protected PostingsHighlighter highlighter

Constructor Detail

PostingsSolrHighlighter

public PostingsSolrHighlighter()

Method Detail

initalize

public void initalize(SolrConfig config)

Specified by:

initalize in class SolrHighlighter

init

public void init(PluginInfo info)

Specified by:

init in interface PluginInfoInitialized

doHighlighting

public NamedList<Object> doHighlighting(DocList docs,
                                        Query query,
                                        SolrQueryRequest req,
                                        String[] defaultFields)
                                 throws IOException

Description copied from class: SolrHighlighter

Generates a list of Highlighted query fragments for each item in a list of documents, or returns null if highlighting is disabled.

Specified by:

doHighlighting in class SolrHighlighter

Parameters:

docs - query results

query - the query

req - the current request

defaultFields - default list of fields to summarize

Returns:

NamedList containing a NamedList for each document, which in turns contains sets (field, summary) pairs.

Throws:

IOException

encodeSnippets

protected NamedList<Object> encodeSnippets(String[] keys,
                                           String[] fieldNames,
                                           Map<String,String[]> snippets)

Encodes the resulting snippets into a namedlist

Parameters:

keys - the document unique keys

fieldNames - field names to highlight in the order

snippets - map from field name to snippet array for the docs

Returns:

encoded namedlist of summaries

toTopDocs

protected TopDocs toTopDocs(DocList docs)

Converts solr's DocList to a lucene TopDocs

getUniqueKeys

protected String[] getUniqueKeys(SolrIndexSearcher searcher,
                                 TopDocs topDocs)
                          throws IOException

Retrieves the unique keys for the topdocs to key the results

Throws:

IOException