1 package org.apache.lucene.queryParser.standard.processors;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
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7 * The ASF licenses this file to You under the Apache License, Version 2.0
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20 import java.util.List;
22 import org.apache.lucene.queryParser.core.QueryNodeException;
23 import org.apache.lucene.queryParser.core.nodes.QueryNode;
24 import org.apache.lucene.queryParser.core.nodes.SlopQueryNode;
25 import org.apache.lucene.queryParser.core.nodes.TokenizedPhraseQueryNode;
26 import org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl;
27 import org.apache.lucene.queryParser.standard.nodes.MultiPhraseQueryNode;
30 * This processor removes invalid {@link SlopQueryNode} objects in the query
31 * node tree. A {@link SlopQueryNode} is invalid if its child is neither a
32 * {@link TokenizedPhraseQueryNode} nor a {@link MultiPhraseQueryNode}. <br/>
36 public class PhraseSlopQueryNodeProcessor extends QueryNodeProcessorImpl {
38 public PhraseSlopQueryNodeProcessor() {
43 protected QueryNode postProcessNode(QueryNode node) throws QueryNodeException {
45 if (node instanceof SlopQueryNode) {
46 SlopQueryNode phraseSlopNode = (SlopQueryNode) node;
48 if (!(phraseSlopNode.getChild() instanceof TokenizedPhraseQueryNode)
49 && !(phraseSlopNode.getChild() instanceof MultiPhraseQueryNode)) {
50 return phraseSlopNode.getChild();
60 protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {
67 protected List<QueryNode> setChildrenOrder(List<QueryNode> children)
68 throws QueryNodeException {