org.eaglei.search.provider.lucene
Class LuceneQueryBuilder

java.lang.Object
  org.eaglei.search.provider.lucene.LuceneSearchIndexSchema
      org.eaglei.search.provider.lucene.LuceneQueryBuilder

public final class LuceneQueryBuilder
extends LuceneSearchIndexSchema

Contains logic for building a Lucene Query from a SearchRequest for the index schema defined by LuceneSearchIndexSchema. Creation of the query can potentially incorporate (neither of these are implemented):

• query-expansion: using an ontology-based entity extraction technique similar to what is done for PubMed
• pseudo-relevance feedback: the top-X results of an initial search are used to create a modified query

Author:

frost

Field Summary

Fields inherited from class org.eaglei.search.provider.lucene.LuceneSearchIndexSchema

HIGH_BOOST, HIGHEST_BOOST, INDEX_OBJECT_PROP_LABELS, INFERRED_TYPE, INSTITUTION_LABEL, INSTITUTION_URI, LOW_BOOST, MEDIUM_BOOST, OBJECT_URI_POSTFIX, PREF_TEXT, RELATED, RESOURCE_FLAG, STANDARD_BOOST, TEXT, URI

Constructor Summary

LuceneQueryBuilder(org.eaglei.model.EIOntModel eagleiOntModel, org.apache.lucene.analysis.Analyzer analyzer)
Creates a LuceneQueryBuilder.

Method Summary

org.apache.lucene.search.Query

createQuery(org.eaglei.search.provider.SearchRequest request) Creates a multi-field query from the SearchRequest.

Methods inherited from class org.eaglei.search.provider.lucene.LuceneSearchIndexSchema

isLabProperty, isPropertyField

Methods inherited from class java.lang.Object

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

Constructor Detail

LuceneQueryBuilder

public LuceneQueryBuilder(org.eaglei.model.EIOntModel eagleiOntModel,
                          org.apache.lucene.analysis.Analyzer analyzer)
                   throws java.io.IOException

Creates a LuceneQueryBuilder.

Parameters:

eagleiOntModel - Reference to the eagle-i ontology model.

analyzer - Analyzer to use for query execution.

Throws:

java.io.IOException

Method Detail

createQuery

public org.apache.lucene.search.Query createQuery(org.eaglei.search.provider.SearchRequest request)
                                           throws org.apache.lucene.queryParser.ParseException

Creates a multi-field query from the SearchRequest.

Parameters:

request - The SearchRequest for which the Lucene Query is being created

Returns:

The Lucene query.

Throws:

org.apache.lucene.queryParser.ParseException