[STANBOL-606] Language prefixes are added to non TextConstraint in queries for the Entityhub

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.9.0-incubating
• Fix Version/s: entityhub-0.10.0-incubating, commons.solr.core-0.10.0-incubating, commons.web.base-0.10.0-incubating
• Component/s: Commons, Entityhub
• Assignee: Rupert Westenthaler
• Reporter: Rupert Westenthaler
• Created: 08/May/12 09:14
• Updated: 10/Jul/12 10:57
• Resolved: 11/May/12 23:12

Description

Currently search terms for the

{all-language} container are added for non TextConstraints of the SolrYard implementation. This is best described by this example

A constraint for "rdf:type" including "db-ont:Organisation" is currently encoded like:

(
((_!@/rdf\:type/:http\://dbpedia.org/ontology/Organisation)) OR
((ref/rdf\:type/:http\://dbpedia.org/ontology/Organisation))
)

The expected query would be

(((ref/rdf\:type/:http\://dbpedia.org/ontology/Organisation)))

While this does not have practical implications - because there are no textual values for the "rdf:type" field and even if it would be unlikely to contain the URI as text - this adds unnecessary query term that do have an impact on the performance - because of that "Priority: Minor"

To fix this the "org.apache.stanbol.entityhub.yard.solr.impl.queryencoders.LangEncoder" needs to consider the data type of parsed IndexFields and only add the default lanauge (the {all-language}

container) if the dataType is "text".