| /* |
| * 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.solr.search; |
| |
| import java.io.ByteArrayInputStream; |
| import java.nio.charset.StandardCharsets; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.queryparser.xml.ParserException; |
| import org.apache.lucene.search.Query; |
| |
| import org.apache.solr.common.params.CommonParams; |
| import org.apache.solr.common.params.SolrParams; |
| import org.apache.solr.common.util.NamedList; |
| import org.apache.solr.request.SolrQueryRequest; |
| import org.apache.solr.schema.IndexSchema; |
| |
| /** |
| * The {@link XmlQParserPlugin} extends the {@link QParserPlugin} and supports the creation of queries from XML. |
| *<p> |
| * Example: |
| * <pre> |
| <BooleanQuery fieldName="description"> |
| <Clause occurs="must"> |
| <TermQuery>shirt</TermQuery> |
| </Clause> |
| <Clause occurs="mustnot"> |
| <TermQuery>plain</TermQuery> |
| </Clause> |
| <Clause occurs="should"> |
| <TermQuery>cotton</TermQuery> |
| </Clause> |
| <Clause occurs="must"> |
| <BooleanQuery fieldName="size"> |
| <Clause occurs="should"> |
| <TermsQuery>S M L</TermsQuery> |
| </Clause> |
| </BooleanQuery> |
| </Clause> |
| </BooleanQuery> |
| </pre> |
| * You can configure your own custom query builders for additional XML elements. |
| * The custom builders need to extend the {@link SolrQueryBuilder} or the |
| * {@link SolrSpanQueryBuilder} class. |
| *<p> |
| * Example solrconfig.xml snippet: |
| * <pre><queryParser name="xmlparser" class="XmlQParserPlugin"> |
| <str name="MyCustomQuery">com.mycompany.solr.search.MyCustomQueryBuilder</str> |
| </queryParser> |
| </pre> |
| */ |
| public class XmlQParserPlugin extends QParserPlugin { |
| public static final String NAME = "xmlparser"; |
| |
| @SuppressWarnings({"rawtypes"}) |
| private NamedList args; |
| |
| @Override |
| public void init( @SuppressWarnings({"rawtypes"})NamedList args ) { |
| super.init(args); |
| this.args = args; |
| } |
| |
| private class XmlQParser extends QParser { |
| |
| public XmlQParser(String qstr, SolrParams localParams, |
| SolrParams params, SolrQueryRequest req) { |
| super(qstr, localParams, params, req); |
| } |
| |
| public Query parse() throws SyntaxError { |
| final String qstr = getString(); |
| if (qstr == null || qstr.isEmpty()) { |
| return null; |
| } |
| final IndexSchema schema = req.getSchema(); |
| final String defaultField = getParam(CommonParams.DF); |
| final Analyzer analyzer = schema.getQueryAnalyzer(); |
| |
| final SolrCoreParser solrParser = new SolrCoreParser(defaultField, analyzer, req); |
| solrParser.init(args); |
| try { |
| return solrParser.parse(new ByteArrayInputStream(qstr.getBytes(StandardCharsets.UTF_8))); |
| } catch (ParserException e) { |
| throw new SyntaxError(e.getMessage() + " in " + req.toString()); |
| } |
| } |
| |
| } |
| |
| public QParser createParser(String qstr, SolrParams localParams, |
| SolrParams params, SolrQueryRequest req) { |
| return new XmlQParser(qstr, localParams, params, req); |
| } |
| |
| } |