package org.apache.lucene.facet.example.association;
import java.util.List;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.store.Directory;
import org.apache.lucene.facet.example.simple.SimpleSearcher;
import org.apache.lucene.facet.search.params.association.AssociationFloatSumFacetRequest;
import org.apache.lucene.facet.search.params.association.AssociationIntSumFacetRequest;
import org.apache.lucene.facet.search.results.FacetResult;
import org.apache.lucene.facet.taxonomy.CategoryPath;
import org.apache.lucene.facet.taxonomy.TaxonomyReader;
import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyReader;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* AssociationSearcher searches index with facets, evaluating the facets with
* their associated $int value
*
* @lucene.experimental
*/
public class AssociationSearcher {
/** Search an index with a sum of int-association. */
public static List<FacetResult> searchSumIntAssociation(Directory indexDir,
Directory taxoDir) throws Exception {
// prepare index reader
IndexReader indexReader = IndexReader.open(indexDir);
TaxonomyReader taxo = new DirectoryTaxonomyReader(taxoDir);
AssociationIntSumFacetRequest facetRequest = new AssociationIntSumFacetRequest(
new CategoryPath("tags"), 10);
List<FacetResult> res = SimpleSearcher.searchWithRequest(indexReader, taxo,
AssociationUtils.assocIndexingParams, facetRequest);
// close readers
taxo.close();
indexReader.close();
return res;
}
/** Search an index with a sum of float-association. */
public static List<FacetResult> searchSumFloatAssociation(Directory indexDir,
Directory taxoDir) throws Exception {
// prepare index reader
IndexReader indexReader = IndexReader.open(indexDir);
TaxonomyReader taxo = new DirectoryTaxonomyReader(taxoDir);
AssociationFloatSumFacetRequest facetRequest = new AssociationFloatSumFacetRequest(
new CategoryPath("genre"), 10);
List<FacetResult> res = SimpleSearcher.searchWithRequest(indexReader, taxo,
AssociationUtils.assocIndexingParams, facetRequest);
// close readers
taxo.close();
indexReader.close();
return res;
}
}