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package org.apache.lucene.queryParser.standard.processors;
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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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import java.util.List;
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import org.apache.lucene.queryParser.core.QueryNodeException;
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import org.apache.lucene.queryParser.core.nodes.QueryNode;
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import org.apache.lucene.queryParser.core.nodes.SlopQueryNode;
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import org.apache.lucene.queryParser.core.nodes.TokenizedPhraseQueryNode;
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import org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl;
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import org.apache.lucene.queryParser.standard.nodes.MultiPhraseQueryNode;
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* This processor removes invalid {@link SlopQueryNode} objects in the query
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* node tree. A {@link SlopQueryNode} is invalid if its child is neither a
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* {@link TokenizedPhraseQueryNode} nor a {@link MultiPhraseQueryNode}. <br/>
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public class PhraseSlopQueryNodeProcessor extends QueryNodeProcessorImpl {
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public PhraseSlopQueryNodeProcessor() {
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protected QueryNode postProcessNode(QueryNode node) throws QueryNodeException {
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if (node instanceof SlopQueryNode) {
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SlopQueryNode phraseSlopNode = (SlopQueryNode) node;
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if (!(phraseSlopNode.getChild() instanceof TokenizedPhraseQueryNode)
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&& !(phraseSlopNode.getChild() instanceof MultiPhraseQueryNode)) {
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return phraseSlopNode.getChild();
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protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {
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protected List<QueryNode> setChildrenOrder(List<QueryNode> children)
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throws QueryNodeException {