com.meizu.nlp.classification.utils.DocToDoubleVectorUtilsTest.java Source code

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/*
 * 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.meizu.nlp.classification.utils;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.FieldType;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.MultiFields;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Terms;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.LuceneTestCase;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class DocToDoubleVectorUtilsTest extends LuceneTestCase {

    private IndexReader index;
    private Directory dir;

    @Override
    @Before
    public void setUp() throws Exception {
        super.setUp();
        dir = newDirectory();
        RandomIndexWriter indexWriter = new RandomIndexWriter(random(), dir);

        FieldType ft = new FieldType(TextField.TYPE_STORED);
        ft.setStoreTermVectors(true);
        ft.setStoreTermVectorOffsets(true);
        ft.setStoreTermVectorPositions(true);

        Document doc;
        for (int i = 0; i < 10; i++) {
            doc = new Document();
            doc.add(new Field("id", Integer.toString(i), ft));
            doc.add(new Field("text",
                    random().nextInt(10) + " " + random().nextInt(10) + " " + random().nextInt(10), ft));
            indexWriter.addDocument(doc);
        }

        indexWriter.commit();

        index = indexWriter.getReader();

        indexWriter.close();
    }

    @Override
    @After
    public void tearDown() throws Exception {
        index.close();
        dir.close();
        super.tearDown();
    }

    @Test
    public void testDenseFreqDoubleArrayConversion() throws Exception {
        IndexSearcher indexSearcher = new IndexSearcher(index);
        for (ScoreDoc scoreDoc : indexSearcher.search(new MatchAllDocsQuery(), Integer.MAX_VALUE).scoreDocs) {
            Terms docTerms = index.getTermVector(scoreDoc.doc, "text");
            Double[] vector = DocToDoubleVectorUtils.toDenseLocalFreqDoubleArray(docTerms);
            assertNotNull(vector);
            assertTrue(vector.length > 0);
        }
    }

    @Test
    public void testSparseFreqDoubleArrayConversion() throws Exception {
        Terms fieldTerms = MultiFields.getTerms(index, "text");
        if (fieldTerms != null && fieldTerms.size() != -1) {
            IndexSearcher indexSearcher = new IndexSearcher(index);
            for (ScoreDoc scoreDoc : indexSearcher.search(new MatchAllDocsQuery(), Integer.MAX_VALUE).scoreDocs) {
                Terms docTerms = index.getTermVector(scoreDoc.doc, "text");
                Double[] vector = DocToDoubleVectorUtils.toSparseLocalFreqDoubleArray(docTerms, fieldTerms);
                assertNotNull(vector);
                assertTrue(vector.length > 0);
            }
        }
    }
}