package org.apache.lucene.search;
/*
* 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.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.util.Collection;
import org.apache.lucene.analysis.*;
import org.apache.lucene.analysis.tokenattributes.OffsetAttribute;
import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.AtomicReader;
import org.apache.lucene.index.MultiFields;
import org.apache.lucene.index.DocsAndPositionsEnum;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.SlowCompositeReaderWrapper;
import org.apache.lucene.index.Term;
import org.apache.lucene.store.Directory;
import org.apache.lucene.search.payloads.PayloadSpanUtil;
import org.apache.lucene.search.spans.MultiSpansWrapper;
import org.apache.lucene.search.spans.SpanNearQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.apache.lucene.search.spans.SpanTermQuery;
import org.apache.lucene.search.spans.Spans;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util.BytesRef;
/**
* Term position unit test.
*
*
*/
public class TestPositionIncrement extends LuceneTestCase {
final static boolean VERBOSE = false;
public void testSetPosition() throws Exception {
Analyzer analyzer = new Analyzer() {
@Override
public TokenStreamComponents createComponents(String fieldName, Reader reader) {
return new TokenStreamComponents(new Tokenizer(reader) {
// TODO: use CannedTokenStream
private final String[] TOKENS = {"1", "2", "3", "4", "5"};
private final int[] INCREMENTS = {1, 2, 1, 0, 1};
private int i = 0;
PositionIncrementAttribute posIncrAtt = addAttribute(PositionIncrementAttribute.class);
CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
OffsetAttribute offsetAtt = addAttribute(OffsetAttribute.class);
@Override
public boolean incrementToken() {
if (i == TOKENS.length)
return false;
clearAttributes();
termAtt.append(TOKENS[i]);
offsetAtt.setOffset(i,i);
posIncrAtt.setPositionIncrement(INCREMENTS[i]);
i++;
return true;
}
@Override
public void reset() throws IOException {
super.reset();
this.i = 0;
}
});
}
};
Directory store = newDirectory();
RandomIndexWriter writer = new RandomIndexWriter(random(), store, analyzer);
Document d = new Document();
d.add(newTextField("field", "bogus", Field.Store.YES));
writer.addDocument(d);
IndexReader reader = writer.getReader();
writer.close();
IndexSearcher searcher = newSearcher(reader);
DocsAndPositionsEnum pos = MultiFields.getTermPositionsEnum(searcher.getIndexReader(),
MultiFields.getLiveDocs(searcher.getIndexReader()),
"field",
new BytesRef("1"));
pos.nextDoc();
// first token should be at position 0
assertEquals(0, pos.nextPosition());
pos = MultiFields.getTermPositionsEnum(searcher.getIndexReader(),
MultiFields.getLiveDocs(searcher.getIndexReader()),
"field",
new BytesRef("2"));
pos.nextDoc();
// second token should be at position 2
assertEquals(2, pos.nextPosition());
PhraseQuery q;
ScoreDoc[] hits;
q = new PhraseQuery();
q.add(new Term("field", "1"));
q.add(new Term("field", "2"));
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(0, hits.length);
// same as previous, just specify positions explicitely.
q = new PhraseQuery();
q.add(new Term("field", "1"),0);
q.add(new Term("field", "2"),1);
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(0, hits.length);
// specifying correct positions should find the phrase.
q = new PhraseQuery();
q.add(new Term("field", "1"),0);
q.add(new Term("field", "2"),2);
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(1, hits.length);
q = new PhraseQuery();
q.add(new Term("field", "2"));
q.add(new Term("field", "3"));
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(1, hits.length);
q = new PhraseQuery();
q.add(new Term("field", "3"));
q.add(new Term("field", "4"));
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(0, hits.length);
// phrase query would find it when correct positions are specified.
q = new PhraseQuery();
q.add(new Term("field", "3"),0);
q.add(new Term("field", "4"),0);
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(1, hits.length);
// phrase query should fail for non existing searched term
// even if there exist another searched terms in the same searched position.
q = new PhraseQuery();
q.add(new Term("field", "3"),0);
q.add(new Term("field", "9"),0);
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(0, hits.length);
// multi-phrase query should succed for non existing searched term
// because there exist another searched terms in the same searched position.
MultiPhraseQuery mq = new MultiPhraseQuery();
mq.add(new Term[]{new Term("field", "3"),new Term("field", "9")},0);
hits = searcher.search(mq, null, 1000).scoreDocs;
assertEquals(1, hits.length);
q = new PhraseQuery();
q.add(new Term("field", "2"));
q.add(new Term("field", "4"));
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(1, hits.length);
q = new PhraseQuery();
q.add(new Term("field", "3"));
q.add(new Term("field", "5"));
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(1, hits.length);
q = new PhraseQuery();
q.add(new Term("field", "4"));
q.add(new Term("field", "5"));
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(1, hits.length);
q = new PhraseQuery();
q.add(new Term("field", "2"));
q.add(new Term("field", "5"));
hits = searcher.search(q, null, 1000).scoreDocs;
assertEquals(0, hits.length);
reader.close();
store.close();
}
public void testPayloadsPos0() throws Exception {
Directory dir = newDirectory();
RandomIndexWriter writer = new RandomIndexWriter(random(), dir, new MockPayloadAnalyzer());
Document doc = new Document();
doc.add(new TextField("content", new StringReader(
"a a b c d e a f g h i j a b k k")));
writer.addDocument(doc);
final IndexReader readerFromWriter = writer.getReader();
AtomicReader r = SlowCompositeReaderWrapper.wrap(readerFromWriter);
DocsAndPositionsEnum tp = r.termPositionsEnum(new Term("content", "a"));
int count = 0;
assertTrue(tp.nextDoc() != DocIdSetIterator.NO_MORE_DOCS);
// "a" occurs 4 times
assertEquals(4, tp.freq());
assertEquals(0, tp.nextPosition());
assertEquals(1, tp.nextPosition());
assertEquals(3, tp.nextPosition());
assertEquals(6, tp.nextPosition());
// only one doc has "a"
assertEquals(DocIdSetIterator.NO_MORE_DOCS, tp.nextDoc());
IndexSearcher is = newSearcher(readerFromWriter);
SpanTermQuery stq1 = new SpanTermQuery(new Term("content", "a"));
SpanTermQuery stq2 = new SpanTermQuery(new Term("content", "k"));
SpanQuery[] sqs = { stq1, stq2 };
SpanNearQuery snq = new SpanNearQuery(sqs, 30, false);
count = 0;
boolean sawZero = false;
if (VERBOSE) {
System.out.println("\ngetPayloadSpans test");
}
Spans pspans = MultiSpansWrapper.wrap(is.getTopReaderContext(), snq);
while (pspans.next()) {
if (VERBOSE) {
System.out.println("doc " + pspans.doc() + ": span " + pspans.start()
+ " to " + pspans.end());
}
Collection<byte[]> payloads = pspans.getPayload();
sawZero |= pspans.start() == 0;
for (byte[] bytes : payloads) {
count++;
if (VERBOSE) {
System.out.println(" payload: " + new String(bytes, "UTF-8"));
}
}
}
assertTrue(sawZero);
assertEquals(5, count);
// System.out.println("\ngetSpans test");
Spans spans = MultiSpansWrapper.wrap(is.getTopReaderContext(), snq);
count = 0;
sawZero = false;
while (spans.next()) {
count++;
sawZero |= spans.start() == 0;
// System.out.println(spans.doc() + " - " + spans.start() + " - " +
// spans.end());
}
assertEquals(4, count);
assertTrue(sawZero);
// System.out.println("\nPayloadSpanUtil test");
sawZero = false;
PayloadSpanUtil psu = new PayloadSpanUtil(is.getTopReaderContext());
Collection<byte[]> pls = psu.getPayloadsForQuery(snq);
count = pls.size();
for (byte[] bytes : pls) {
String s = new String(bytes, "UTF-8");
//System.out.println(s);
sawZero |= s.equals("pos: 0");
}
assertEquals(5, count);
assertTrue(sawZero);
writer.close();
is.getIndexReader().close();
dir.close();
}
}