com.leavesfly.lia.searching.Fragments.java Source code

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Here is the source code for com.leavesfly.lia.searching.Fragments.java

Source

package com.leavesfly.lia.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 java.io.File;

import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryParser.*;
import org.apache.lucene.search.*;
import org.apache.lucene.analysis.*;
import org.apache.lucene.index.*;
import org.apache.lucene.util.*;

// From chapter 3
public class Fragments {

    public void openSearcher() throws Exception {
        Directory dir = FSDirectory.open(new File("/path/to/index"));
        IndexReader reader = IndexReader.open(dir);
        IndexSearcher searcher = new IndexSearcher(reader);
    }

    public void nrtReader() throws Exception {
        IndexReader reader = null;
        IndexSearcher searcher;
        // START
        IndexReader newReader = reader.reopen();
        if (reader != newReader) {
            reader.close();
            reader = newReader;
            searcher = new IndexSearcher(reader);
        }
        // END
    }

    public void testSearchSigs() throws Exception {
        Query query = null;
        Filter filter = null;
        TopDocs hits;
        TopFieldDocs fieldHits;
        Sort sort = null;
        Collector collector = null;
        int n = 10;
        IndexSearcher searcher = null;

        hits = searcher.search(query, n);
        hits = searcher.search(query, filter, n);
        fieldHits = searcher.search(query, filter, n, sort);
        searcher.search(query, collector);
        searcher.search(query, filter, collector);
    }

    public void queryParserOperator() throws Exception {
        Analyzer analyzer = null;
        // START
        QueryParser parser = new QueryParser(Version.LUCENE_30, "contents", analyzer);
        parser.setDefaultOperator(QueryParser.AND_OPERATOR);
        // END
    }
}