| /* |
| * 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. |
| */ |
| package org.apache.lucene.queryparser.flexible.standard.builders; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.TreeMap; |
| |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.queryparser.flexible.core.QueryNodeException; |
| import org.apache.lucene.queryparser.flexible.core.builders.QueryTreeBuilder; |
| import org.apache.lucene.queryparser.flexible.core.nodes.FieldQueryNode; |
| import org.apache.lucene.queryparser.flexible.core.nodes.QueryNode; |
| import org.apache.lucene.queryparser.flexible.standard.nodes.MultiPhraseQueryNode; |
| import org.apache.lucene.search.MultiPhraseQuery; |
| import org.apache.lucene.search.TermQuery; |
| |
| /** |
| * Builds a {@link MultiPhraseQuery} object from a {@link MultiPhraseQueryNode} |
| * object. |
| */ |
| public class MultiPhraseQueryNodeBuilder implements StandardQueryBuilder { |
| |
| public MultiPhraseQueryNodeBuilder() { |
| // empty constructor |
| } |
| |
| @Override |
| public MultiPhraseQuery build(QueryNode queryNode) throws QueryNodeException { |
| MultiPhraseQueryNode phraseNode = (MultiPhraseQueryNode) queryNode; |
| |
| MultiPhraseQuery.Builder phraseQueryBuilder = new MultiPhraseQuery.Builder(); |
| |
| List<QueryNode> children = phraseNode.getChildren(); |
| |
| if (children != null) { |
| TreeMap<Integer, List<Term>> positionTermMap = new TreeMap<>(); |
| |
| for (QueryNode child : children) { |
| FieldQueryNode termNode = (FieldQueryNode) child; |
| TermQuery termQuery = (TermQuery) termNode |
| .getTag(QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID); |
| List<Term> termList = positionTermMap.get(termNode |
| .getPositionIncrement()); |
| |
| if (termList == null) { |
| termList = new LinkedList<>(); |
| positionTermMap.put(termNode.getPositionIncrement(), termList); |
| |
| } |
| |
| termList.add(termQuery.getTerm()); |
| |
| } |
| |
| for (Map.Entry<Integer, List<Term>> entry : positionTermMap.entrySet()) { |
| List<Term> termList = entry.getValue(); |
| phraseQueryBuilder.add(termList.toArray(new Term[termList.size()]), entry.getKey()); |
| } |
| |
| } |
| |
| return phraseQueryBuilder.build(); |
| |
| } |
| |
| } |