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updated query boosting #647

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merged 2 commits into from
Sep 12, 2017
Merged

updated query boosting #647

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9b69ed4
updated query boosting
amirkamran Nov 11, 2016
3e0129b
Update SolrServiceTweaksPlugin.java
amirkamran Mar 20, 2017
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29 changes: 20 additions & 9 deletions dspace-api/src/main/java/cz/cuni/mff/ufal/dspace/discovery/SolrServiceTweaksPlugin.java
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Original file line number Diff line number Diff line change
Expand Up @@ -43,16 +43,27 @@ public class SolrServiceTweaksPlugin implements SolrServiceIndexPlugin,
public void additionalSearchParameters(Context context,
DiscoverQuery discoveryQuery, SolrQuery solrQuery)
{
String query = discoveryQuery.getQuery();
// follows previous impl, but is it correct?
if (query == null)
{
query = "*:*";
}
String q = solrQuery.getQuery() + " OR title:(" + query + ")^5";
q = q + " OR ((" + q + ") AND -dc.relation.isreplacedby:*)^5 OR ((" + q + ") AND dc.relation.replaces:*)^15";
solrQuery.setQuery(q);
// This method is called from SolrServiceImpl.resolveToSolrQuery
// at this point the solrQuery object should already have the required query and parameters coming from discoveryQuery

// get the current query
String query = solrQuery.getQuery();

// the query terms must occur in the search results
query = "+(" + query + ")";

// if the query terms are in the title increase the significance of search result
query += " OR title:(" + query + ")^2";

// if a new version of item available increase the significance of newer item (as the newer version should contain dc.relation.replaces)
query += " OR dc.relation.replaces:[* TO *]^2";

// if more than one version of the item is available increase the significance of the newest
// (should contain dc.relation.replaces but should not contain dc.relation.isreplacedby)
query += " OR (dc.relation.replaces:[* TO *] AND -dc.relation.isreplacedby:[* TO *])^2";

// set the updated query back to solrQuery
solrQuery.setQuery(query);
}

@Override
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