content: /**
   * 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 org.apache.lucene.queryParser.ParseException;
  import org.apache.lucene.search.Query;
  import org.apache.solr.common.params.SolrParams;
  import org.apache.solr.common.util.NamedList;
  import org.apache.solr.request.SolrQueryRequest;
  import org.apache.solr.search.function.ValueSource;
  
  /**
   * Create a nested query, with the ability of that query to redefine it's type via
   * local parameters.  This is useful in specifying defaults in configuration and
   * letting clients indirectly reference them.
   * <br>Example: <code>{!query defType=func v=$q1}</code>
   * <br> if the q1 parameter is <code>price</code> then the query would be a function query on the price field.
   * <br> if the q1 parameter is <code>{!lucene}inStock:true</code> then a term query is
   *     created from the lucene syntax string that matches documents with inStock=true.
   */
  public class NestedQParserPlugin extends QParserPlugin {
    public static String NAME = "query";
  
    public void init(NamedList args) {
    }
  
    @Override
    public QParser createParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) {
      return new QParser(qstr, localParams, params, req) {
        QParser baseParser;
        ValueSource vs;
        String b;
  
        @Override
        public Query parse() throws ParseException {
          baseParser = subQuery(localParams.get(QueryParsing.V), null);
          return baseParser.getQuery();
        }
  
        @Override
        public String[] getDefaultHighlightFields() {
          return baseParser.getDefaultHighlightFields();
        }
  
        @Override
        public Query getHighlightQuery() throws ParseException {
          return baseParser.getHighlightQuery();
        }
  
        @Override
        public void addDebugInfo(NamedList<Object> debugInfo) {
          // encapsulate base debug info in a sub-list?
          baseParser.addDebugInfo(debugInfo);
        }
      };
    }
  
  }