+++ /dev/null
-package org.apache.lucene.facet.search;
-
-import org.apache.lucene.index.Term;
-import org.apache.lucene.search.BooleanQuery;
-import org.apache.lucene.search.Query;
-import org.apache.lucene.search.TermQuery;
-import org.apache.lucene.search.BooleanClause.Occur;
-
-import org.apache.lucene.facet.index.params.CategoryListParams;
-import org.apache.lucene.facet.index.params.FacetIndexingParams;
-import org.apache.lucene.facet.search.params.FacetSearchParams;
-import org.apache.lucene.facet.taxonomy.CategoryPath;
-
-/**
- * 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.
- */
-
-/**
- * Creation of drill down term or query.
- *
- * @lucene.experimental
- */
-public final class DrillDown {
-
- /**
- * @see #term(FacetIndexingParams, CategoryPath)
- */
- public static final Term term(FacetSearchParams sParams, CategoryPath path) {
- return term(sParams.getFacetIndexingParams(), path);
- }
-
- /**
- * Return a term for drilling down into a category.
- */
- public static final Term term(FacetIndexingParams iParams, CategoryPath path) {
- CategoryListParams clp = iParams.getCategoryListParams(path);
- char[] buffer = new char[path.charsNeededForFullPath()];
- iParams.drillDownTermText(path, buffer);
- return clp.getTerm().createTerm(String.valueOf(buffer));
- }
-
- /**
- * Return a query for drilling down into all given categories (AND).
- * @see #term(FacetSearchParams, CategoryPath)
- * @see #query(FacetSearchParams, Query, CategoryPath...)
- */
- public static final Query query(FacetIndexingParams iParams, CategoryPath... paths) {
- if (paths==null || paths.length==0) {
- throw new IllegalArgumentException("Empty category path not allowed for drill down query!");
- }
- if (paths.length==1) {
- return new TermQuery(term(iParams, paths[0]));
- }
- BooleanQuery res = new BooleanQuery();
- for (CategoryPath cp : paths) {
- res.add(new TermQuery(term(iParams, cp)), Occur.MUST);
- }
- return res;
- }
-
- /**
- * Return a query for drilling down into all given categories (AND).
- * @see #term(FacetSearchParams, CategoryPath)
- * @see #query(FacetSearchParams, Query, CategoryPath...)
- */
- public static final Query query(FacetSearchParams sParams, CategoryPath... paths) {
- return query(sParams.getFacetIndexingParams(), paths);
- }
-
- /**
- * Turn a base query into a drilling-down query for all given category paths (AND).
- * @see #query(FacetIndexingParams, CategoryPath...)
- */
- public static final Query query(FacetIndexingParams iParams, Query baseQuery, CategoryPath... paths) {
- BooleanQuery res = new BooleanQuery();
- res.add(baseQuery, Occur.MUST);
- res.add(query(iParams, paths), Occur.MUST);
- return res;
- }
-
- /**
- * Turn a base query into a drilling-down query for all given category paths (AND).
- * @see #query(FacetSearchParams, CategoryPath...)
- */
- public static final Query query(FacetSearchParams sParams, Query baseQuery, CategoryPath... paths) {
- return query(sParams.getFacetIndexingParams(), baseQuery, paths);
- }
-
- /**
- * Turn a base query into a drilling-down query using the default {@link FacetSearchParams}
- * @see #query(FacetSearchParams, Query, CategoryPath...)
- */
- public static final Query query(Query baseQuery, CategoryPath... paths) {
- return query(new FacetSearchParams(), baseQuery, paths);
- }
-
-}