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 com.alipay.tiansuan.solrplugin;
  
  
  import org.apache.lucene.document.NumericField.DataType;
  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.schema.FieldType;
  import org.apache.solr.schema.SchemaField;
  import org.apache.solr.schema.StrField;
  import org.apache.solr.schema.TrieField;
  import org.apache.solr.schema.TrieField.TrieTypes;
  import org.apache.solr.search.QParser;
  import org.apache.solr.search.QParserPlugin;
  import org.apache.solr.search.QueryParsing;
  
  /**
   * select in file
   * 
   *      <queryParser name="inhdfs" class="com.alipay.tiansuan.solrplugin.SelectInLocalFileQParserPlugin"/>
  
  http://hdphadoop:8983/solr/select/?q=user_id%3A2*&version=2.2&start=0&rows=10&indent=on&fq={!inhdfs%20f=user_id}hdfs://hdphadoop.com:9000/data/tiansuan/filein2
  http://hdphadoop:8983/solr/select/?q=user_id%3A2*&version=2.2&start=0&rows=100&indent=on&fq={!infile%20f=user_id}/data/testdata/filein
   * {!inhdfs f=myfield}filename
   * @author yannian
   * @version $Id: SelectInLocalFileQParserPlugin.java, v 0.1 2012-7-19 上午10:44:24 yannian Exp $
   */
  public class SelectInLocalFileQParserPlugin extends QParserPlugin {
      public static String NAME = "inhdfs";
  
      public void init(NamedList args) {
      }
  
      @Override
      public QParser createParser(String qstr, SolrParams localParams,
  	    SolrParams params, SolrQueryRequest req) {
  	return new QParser(qstr, localParams, params, req) {
  	    @Override
  	    public Query parse() throws ParseException {
  		try {
  		    String file = localParams.get(QueryParsing.V);
  		    String field=localParams.get(QueryParsing.F);
  		    
  		    SchemaField sf = req.getSchema().getField(field);
  	        FieldType ft = sf.getType();
  	        if(ft instanceof StrField)
  	        {
  	        	return new StringSelectInQuery<String>(file,field,new HdfsToSet.TransString());
  	        }
  	        if(ft instanceof TrieField)
  	        {
  	        	TrieField tft=(TrieField)ft;
  	        	TrieTypes cdt=tft.getType();
  	        	if(cdt.equals(TrieTypes.INTEGER))
  	        	{
  		        	return new NumericSelectInQuery<Integer>(field,tft.getPrecisionStep(),DataType.INT, new HdfsToSet.TransInt(),file);
  	        	}
  	        	if(cdt.equals(TrieTypes.LONG))
  	        	{
  		        	return new NumericSelectInQuery<Long>(field,tft.getPrecisionStep(),DataType.LONG, new HdfsToSet.TransLong(),file);
  	        	}
  	        	
  	        	if(cdt.equals(TrieTypes.FLOAT))
  	        	{
  		        	return new NumericSelectInQuery<Float>(field,tft.getPrecisionStep(),DataType.FLOAT, new HdfsToSet.TransFloat(),file);
  	        	}
  	        	
  	        	if(cdt.equals(TrieTypes.DOUBLE))
  	        	{
  		        	return new NumericSelectInQuery<Double>(field,tft.getPrecisionStep(),DataType.DOUBLE, new HdfsToSet.TransDouble(),file);
  	        	}
  	        	
  	        	if(cdt.equals(TrieTypes.DATE))
  	        	{
  		        	return new NumericSelectInQuery<Long>(field,tft.getPrecisionStep(),DataType.LONG, new HdfsToSet.TransDate(),file);
  	        	}
  	        }
  		    
  		    throw new ParseException("file type error");
  
  
  		} catch (Exception e) {
  		    throw new ParseException(e.toString());
  		}
  	    }
  	};
      }
  }
  
  