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.queryParser.QueryParser;
  import org.apache.lucene.search.Query;
  import org.apache.lucene.search.Sort;
  import org.apache.solr.common.SolrException;
  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.common.util.StrUtils;
  import org.apache.solr.request.SolrQueryRequest;
  
  import java.util.List;
  /**
   * Parse Solr's variant on the Lucene QueryParser syntax.
   * <br>Other parameters:<ul>
   * <li>q.op - the default operator "OR" or "AND"</li>
   * <li>df - the default field name</li>
   * </ul>
   * <br>Example: <code>{!lucene q.op=AND df=text sort='price asc'}myfield:foo +bar -baz</code>
   */
  public class LuceneQParserPlugin extends QParserPlugin {
    public static String NAME = "lucene";
  
    public void init(NamedList args) {
    }
  
    @Override
    public QParser createParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) {
      return new LuceneQParser(qstr, localParams, params, req);
    }
  }
  
  class LuceneQParser extends QParser {
    String sortStr;
    SolrQueryParser lparser;
  
    public LuceneQParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) {
      super(qstr, localParams, params, req);
    }
  
  
    @Override
    public Query parse() throws ParseException {
      String qstr = getString();
  
      String defaultField = getParam(CommonParams.DF);
      if (defaultField==null) {
        defaultField = getReq().getSchema().getDefaultSearchFieldName();
      }
      lparser = new SolrQueryParser(this, defaultField);
  
      // these could either be checked & set here, or in the SolrQueryParser constructor
      String opParam = getParam(QueryParsing.OP);
      if (opParam != null) {
        lparser.setDefaultOperator("AND".equals(opParam) ? QueryParser.Operator.AND : QueryParser.Operator.OR);
      } else {
        // try to get default operator from schema
        QueryParser.Operator operator = getReq().getSchema().getSolrQueryParser(null).getDefaultOperator();
        lparser.setDefaultOperator(null == operator ? QueryParser.Operator.OR : operator);
      }
  
      return lparser.parse(qstr);
    }
  
  
    @Override
    public String[] getDefaultHighlightFields() {
      return new String[]{lparser.getField()};
    }
    
  }
  
  
  class OldLuceneQParser extends LuceneQParser {
    String sortStr;
  
    public OldLuceneQParser(String qstr, SolrParams localParams, SolrParams params, SolrQueryRequest req) {
      super(qstr, localParams, params, req);
    }
  
    @Override
    public Query parse() throws ParseException {
      // handle legacy "query;sort" syntax
      if (getLocalParams() == null) {
        String qstr = getString();
        sortStr = getParams().get(CommonParams.SORT);
        if (sortStr == null) {
          // sort may be legacy form, included in the query string
          List<String> commands = StrUtils.splitSmart(qstr,';');
          if (commands.size() == 2) {
            qstr = commands.get(0);
            sortStr = commands.get(1);
          } else if (commands.size() == 1) {
            // This is need to support the case where someone sends: "q=query;"
            qstr = commands.get(0);
          }
          else if (commands.size() > 2) {
            throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "If you want to use multiple ';' in the query, use the 'sort' param.");
          }
        }
        setString(qstr);
      }
  
      return super.parse();
    }
  
    @Override
    public SortSpec getSort(boolean useGlobal) throws ParseException {
      SortSpec sort = super.getSort(useGlobal);
      if (sortStr != null && sortStr.length()>0 && sort.getSort()==null) {
        Sort oldSort = QueryParsing.parseSort(sortStr, getReq());
        if( oldSort != null ) {
          sort.sort = oldSort;
        }
      }
      return sort;
    }
  
  }
  
  