1 package org.apache.lucene.queryParser.standard.processors;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
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20 import java.util.List;
22 import org.apache.lucene.queryParser.core.QueryNodeException;
23 import org.apache.lucene.queryParser.core.config.QueryConfigHandler;
24 import org.apache.lucene.queryParser.core.nodes.FieldQueryNode;
25 import org.apache.lucene.queryParser.core.nodes.FuzzyQueryNode;
26 import org.apache.lucene.queryParser.core.nodes.ParametricQueryNode;
27 import org.apache.lucene.queryParser.core.nodes.QueryNode;
28 import org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl;
29 import org.apache.lucene.queryParser.core.util.UnescapedCharSequence;
30 import org.apache.lucene.queryParser.standard.config.StandardQueryConfigHandler.ConfigurationKeys;
31 import org.apache.lucene.queryParser.standard.nodes.WildcardQueryNode;
34 * This processor verifies if
35 * {@link ConfigurationKeys#LOWERCASE_EXPANDED_TERMS} is defined in the
36 * {@link QueryConfigHandler}. If it is and the expanded terms should be
37 * lower-cased, it looks for every {@link WildcardQueryNode},
38 * {@link FuzzyQueryNode} and {@link ParametricQueryNode} and lower-case its
41 * @see ConfigurationKeys#LOWERCASE_EXPANDED_TERMS
43 public class LowercaseExpandedTermsQueryNodeProcessor extends
44 QueryNodeProcessorImpl {
46 public LowercaseExpandedTermsQueryNodeProcessor() {
51 public QueryNode process(QueryNode queryTree) throws QueryNodeException {
52 Boolean lowercaseExpandedTerms = getQueryConfigHandler().get(ConfigurationKeys.LOWERCASE_EXPANDED_TERMS);
54 if (lowercaseExpandedTerms != null && lowercaseExpandedTerms) {
55 return super.process(queryTree);
63 protected QueryNode postProcessNode(QueryNode node) throws QueryNodeException {
65 if (node instanceof WildcardQueryNode || node instanceof FuzzyQueryNode
66 || node instanceof ParametricQueryNode) {
68 FieldQueryNode fieldNode = (FieldQueryNode) node;
69 fieldNode.setText(UnescapedCharSequence.toLowerCase(fieldNode.getText()));
77 protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {
84 protected List<QueryNode> setChildrenOrder(List<QueryNode> children)
85 throws QueryNodeException {