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4.5.7. Retrieving an Analyzer

Retrieving an analyzer can be used when multiple analyzers have been used in a domain model, in order to benefit from stemming or phonetic approximation, etc. In this case, use the same analyzers to building a query. Alternatively, use the Lucene-based Query API, which selects the correct analyzer automatically. See Section 5.1.2, “Building a Lucene Query”.

The scoped analyzer for a given entity can be retrieved using either the Lucene programmatic API or the Lucene query parser. A scoped analyzer applies the right analyzers depending on the field indexed. Multiple analyzers can be defined on a given entity, each working on an individual field. A scoped analyzer unifies these analyzers into a context-aware analyzer.

In the following example, the song title is indexed in two fields:

Standard analyzer: used in the title field.
Stemming analyzer: used in the title_stemmed field.

Using the analyzer provided by the search factory, the query uses the appropriate analyzer depending on the field targeted.

Example 4.12. Using the scoped analyzer when building a full-text query

SearchManager manager = Search.getSearchManager(cache);

org.apache.lucene.queryParser.QueryParser parser = new QueryParser(
    org.apache.lucene.util.Version.LUCENE_36,
    "title", 
    manager.getSearchFactory().getAnalyzer(Song.class)
);

org.apache.lucene.search.Query luceneQuery = 
    parser.parse("title:sky Or title_stemmed:diamond");

// wrap Lucene query in a org.infinispan.query.CacheQuery
CacheQuery cacheQuery = manager.getQuery(luceneQuery, Song.class);

List result = cacheQuery.list(); 
//return the list of matching objects

SearchManager manager = Search.getSearchManager(cache);

org.apache.lucene.queryParser.QueryParser parser = new QueryParser(
    org.apache.lucene.util.Version.LUCENE_36,
    "title", 
    manager.getSearchFactory().getAnalyzer(Song.class)
);

org.apache.lucene.search.Query luceneQuery = 
    parser.parse("title:sky Or title_stemmed:diamond");

// wrap Lucene query in a org.infinispan.query.CacheQuery
CacheQuery cacheQuery = manager.getQuery(luceneQuery, Song.class);

List result = cacheQuery.list(); 
//return the list of matching objects

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Note

Analyzers defined via @AnalyzerDef can also be retrieved by their definition name using searchFactory.getAnalyzer(String).

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4.5.7. Retrieving an Analyzer

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