package org.apache.lucene.benchmark.byTask.feeds;
/**
* 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.
*/
import java.util.ArrayList;
import java.util.StringTokenizer;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.Query;
/**
* Create sloppy phrase queries for performance test, in an index created using simple doc maker.
*/
public class SimpleSloppyPhraseQueryMaker extends SimpleQueryMaker {
/* (non-Javadoc)
* @see org.apache.lucene.benchmark.byTask.feeds.SimpleQueryMaker#prepareQueries()
*/
@Override
protected Query[] prepareQueries() throws Exception {
// extract some 100 words from doc text to an array
String words[];
ArrayList<String> w = new ArrayList<String>();
StringTokenizer st = new StringTokenizer(SingleDocSource.DOC_TEXT);
while (st.hasMoreTokens() && w.size()<100) {
w.add(st.nextToken());
}
words = w.toArray(new String[0]);
// create queries (that would find stuff) with varying slops
ArrayList<Query> queries = new ArrayList<Query>();
for (int slop=0; slop<8; slop++) {
for (int qlen=2; qlen<6; qlen++) {
for (int wd=0; wd<words.length-qlen-slop; wd++) {
// ordered
int remainedSlop = slop;
PhraseQuery q = new PhraseQuery();
q.setSlop(slop);
int wind = wd;
for (int i=0; i<qlen; i++) {
q.add(new Term(DocMaker.BODY_FIELD,words[wind++]));
if (remainedSlop>0) {
remainedSlop--;
wind++;
}
}
queries.add(q);
// reversed
remainedSlop = slop;
q = new PhraseQuery();
q.setSlop(slop+2*qlen);
wind = wd+qlen+remainedSlop-1;
for (int i=0; i<qlen; i++) {
q.add(new Term(DocMaker.BODY_FIELD,words[wind--]));
if (remainedSlop>0) {
remainedSlop--;
wind--;
}
}
queries.add(q);
}
}
}
return queries.toArray(new Query[0]);
}
}