/*
* 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.lucene.benchmark.quality.trec;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import org.apache.lucene.benchmark.quality.QualityQuery;
/**
* Read topics of TREC 1MQ track.
* <p>
* Expects this topic format -
* <pre>
* qnum:qtext
* </pre>
* Comment lines starting with '#' are ignored.
* <p>
* All topics will have a single name value pair.
*/
public class Trec1MQReader {
private String name;
/**
* Constructor for Trec's 1MQ TopicsReader
* @param name name of name-value pair to set for all queries.
*/
public Trec1MQReader(String name) {
super();
this.name = name;
}
/**
* Read quality queries from trec 1MQ format topics file.
* @param reader where queries are read from.
* @return the result quality queries.
* @throws IOException if cannot read the queries.
*/
public QualityQuery[] readQueries(BufferedReader reader) throws IOException {
ArrayList<QualityQuery> res = new ArrayList<>();
String line;
try {
while (null!=(line=reader.readLine())) {
line = line.trim();
if (line.startsWith("#")) {
continue;
}
// id
int k = line.indexOf(":");
String id = line.substring(0,k).trim();
// qtext
String qtext = line.substring(k+1).trim();
// we got a topic!
HashMap<String,String> fields = new HashMap<>();
fields.put(name,qtext);
//System.out.println("id: "+id+" qtext: "+qtext+" line: "+line);
QualityQuery topic = new QualityQuery(id,fields);
res.add(topic);
}
} finally {
reader.close();
}
// sort result array (by ID)
QualityQuery qq[] = res.toArray(new QualityQuery[0]);
Arrays.sort(qq);
return qq;
}
}