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package org.apache.lucene.facet.example.association;
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import org.apache.lucene.facet.enhancements.association.AssociationEnhancement;
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import org.apache.lucene.facet.enhancements.association.AssociationFloatProperty;
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import org.apache.lucene.facet.enhancements.association.AssociationIntProperty;
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import org.apache.lucene.facet.enhancements.association.AssociationProperty;
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import org.apache.lucene.facet.enhancements.params.DefaultEnhancementsIndexingParams;
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import org.apache.lucene.facet.taxonomy.CategoryPath;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* @lucene.experimental
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public class AssociationUtils {
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* Categories: categories[D][N] == category-path with association no. N for
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public static CategoryPath[][] categories = {
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{ new CategoryPath("tags", "lucene") ,
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new CategoryPath("genre", "computing")
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{ new CategoryPath("tags", "lucene"),
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new CategoryPath("tags", "solr"),
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new CategoryPath("genre", "computing"),
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new CategoryPath("genre", "software")
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public static AssociationProperty[][] associations = {
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// Doc #1 associations
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/* 3 occurrences for tag 'lucene' */
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new AssociationIntProperty(3),
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/* 87% confidence level of genre 'computing' */
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new AssociationFloatProperty(0.87f)
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// Doc #2 associations
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/* 1 occurrence for tag 'lucene' */
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new AssociationIntProperty(1),
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/* 2 occurrences for tag 'solr' */
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new AssociationIntProperty(2),
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/* 75% confidence level of genre 'computing' */
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new AssociationFloatProperty(0.75f),
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/* 34% confidence level of genre 'software' */
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new AssociationFloatProperty(0.34f),
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* Indexing Params: the indexing params to use when dealing with
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public static final DefaultEnhancementsIndexingParams assocIndexingParams =
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new DefaultEnhancementsIndexingParams(new AssociationEnhancement());