com.mathworks.xzheng.extsearch.payloads.PayloadsTest.java Source code

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Here is the source code for com.mathworks.xzheng.extsearch.payloads.PayloadsTest.java

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package com.mathworks.xzheng.extsearch.payloads;

/**
 * Copyright Manning Publications Co.
 *
 * Licensed 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 lan      
*/

import java.io.IOException;

import junit.framework.TestCase;

import com.mathworks.xzheng.common.TestUtil;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.index.Term;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.payloads.PayloadTermQuery;
import org.apache.lucene.search.payloads.AveragePayloadFunction;

// From chapter 6
public class PayloadsTest extends TestCase {

    Directory dir;
    IndexWriter writer;
    BulletinPayloadsAnalyzer analyzer;

    protected void setUp() throws Exception {
        super.setUp();
        dir = new RAMDirectory();
        analyzer = new BulletinPayloadsAnalyzer(5.0F); // #A
        writer = new IndexWriter(dir, analyzer, IndexWriter.MaxFieldLength.UNLIMITED);
    }

    protected void tearDown() throws Exception {
        super.tearDown();
        writer.close();
    }

    void addDoc(String title, String contents) throws IOException {
        Document doc = new Document();
        doc.add(new Field("title", title, Field.Store.YES, Field.Index.NO));
        doc.add(new Field("contents", contents, Field.Store.NO, Field.Index.ANALYZED));
        analyzer.setIsBulletin(contents.startsWith("Bulletin:"));
        writer.addDocument(doc);
    }

    public void testPayloadTermQuery() throws Throwable {
        addDoc("Hurricane warning",
                "Bulletin: A hurricane warning was issued at " + "6 AM for the outer great banks");
        addDoc("Warning label maker", "The warning label maker is a delightful toy for "
                + "your precocious seven year old's warning needs");
        addDoc("Tornado warning",
                "Bulletin: There is a tornado warning for " + "Worcester county until 6 PM today");

        IndexReader r = writer.getReader();
        writer.close();

        IndexSearcher searcher = new IndexSearcher(r);

        searcher.setSimilarity(new BoostingSimilarity());

        Term warning = new Term("contents", "warning");

        Query query1 = new TermQuery(warning);
        System.out.println("\nTermQuery results:");
        TopDocs hits = searcher.search(query1, 10);
        TestUtil.dumpHits(searcher, hits);

        assertEquals("Warning label maker", // #B
                searcher.doc(hits.scoreDocs[0].doc).get("title")); // #B

        Query query2 = new PayloadTermQuery(warning, new AveragePayloadFunction());
        System.out.println("\nPayloadTermQuery results:");
        hits = searcher.search(query2, 10);
        TestUtil.dumpHits(searcher, hits);

        assertEquals("Warning label maker", // #C
                searcher.doc(hits.scoreDocs[2].doc).get("title")); // #C
        r.close();

    }
}

/*
  #A Boost by 5.0
  #B Ranks first
  #C Ranks last after boosts
*/