/**
* 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.
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package org.apache.mahout.utils.vectors.lucene;
import junit.framework.TestCase;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.Document;
import org.apache.lucene.util.Version;
import org.apache.mahout.utils.vectors.Weight;
import org.apache.mahout.utils.vectors.TFIDF;
import org.apache.mahout.utils.vectors.TermInfo;
import org.apache.mahout.matrix.Vector;
import org.apache.mahout.matrix.SparseVector;
public class LuceneIterableTest extends TestCase {
private RAMDirectory directory;
private static final String [] DOCS = {
"The quick red fox jumped over the lazy brown dogs.",
"Mary had a little lamb whose fleece was white as snow.",
"Moby Dick is a story of a whale and a man obsessed.",
"The robber wore a black fleece jacket and a baseball cap.",
"The English Springer Spaniel is the best of all dogs."
};
@Override
protected void setUp() throws Exception {
super.setUp();
directory = new RAMDirectory();
IndexWriter writer = new IndexWriter(directory, new StandardAnalyzer(Version.LUCENE_CURRENT), true, IndexWriter.MaxFieldLength.UNLIMITED);
for (int i = 0; i < DOCS.length; i++){
Document doc = new Document();
Field id = new Field("id", "doc_" + i, Field.Store.YES, Field.Index.NOT_ANALYZED_NO_NORMS);
doc.add(id);
//Store both position and offset information
Field text = new Field("content", DOCS[i], Field.Store.NO, Field.Index.ANALYZED, Field.TermVector.YES);
doc.add(text);
writer.addDocument(doc);
}
writer.close();
}
public void testIterable() throws Exception {
IndexReader reader = IndexReader.open(directory, true);
Weight weight = new TFIDF();
TermInfo termInfo = new CachedTermInfo(reader, "content", 1, 100);
VectorMapper mapper = new TFDFMapper(reader, weight, termInfo);
LuceneIterable iterable = new LuceneIterable(reader, "id", "content", mapper);
//TODO: do something more meaningful here
for (Vector vector : iterable) {
assertTrue("vector is not an instanceof " + SparseVector.class, vector instanceof SparseVector);
assertTrue("vector Size: " + vector.size() + " is not greater than: " + 0, vector.size() > 0);
}
}
}