com.mathworks.xzheng.searching.PrefixQueryTest.java Source code

Introduction

Here is the source code for com.mathworks.xzheng.searching.PrefixQueryTest.java

Source

package com.mathworks.xzheng.searching;

/**
 * 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 junit.framework.TestCase;

import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.PrefixQuery;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;

import com.mathworks.xzheng.common.TestUtil;

// From chapter 3
public class PrefixQueryTest extends TestCase {
    public void testPrefix() throws Exception {
        Directory dir = TestUtil.getBookIndexDirectory();
        IndexSearcher searcher = new IndexSearcher(DirectoryReader.open(dir));

        Term term = new Term("category", //#A
                "/technology/computers/programming"); //#A
        PrefixQuery query = new PrefixQuery(term); //#A

        TopDocs matches = searcher.search(query, 10); //#A
        int programmingAndBelow = matches.totalHits;

        matches = searcher.search(new TermQuery(term), 10); //#B
        int justProgramming = matches.totalHits;

        assertTrue(programmingAndBelow > justProgramming);

        dir.close();
    }
}

/*
  #A Search, including subcategories
  #B Search, without subcategories
*/