Question

I’m learning to work with lucene. I wrote a simple program to test lucene analyzers like:

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.analysis.StopAnalyzer;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.util.Version;
import org.apache.lucene.wordnet.AnalyzerUtils;
import java.io.IOException;
public class AnalyzerDemo {
    private static final String[] examples = {
        "The quick brown fox jumped over the lazy dog",
        "XY&Z Corporation - [e-mail]"
        };
    private static final Analyzer[] analyzers = new Analyzer[] {
        new WhitespaceAnalyzer(),
        new SimpleAnalyzer(),
        new StopAnalyzer(Version.LUCENE_30),
        new StandardAnalyzer(Version.LUCENE_30)
    };
    public static void main(String[] args) throws IOException {
        String[] strings = examples;
        if (args.length > 0) {
            strings = args;
        }
        for (String text : strings) {
            analyze(text);
        }
    }
    private static void analyze(String text) throws IOException {
        System.out.println("Analyzing \"" + text + "\"");
        for (Analyzer analyzer : analyzers) {
            String name = analyzer.getClass().getSimpleName();
            System.out.println(" " + name + ":");
            System.out.print("          ");
            AnalyzerUtils.displayTokens(analyzer, text);
            System.out.println("\n");
        }
    }
}

but I got the following error:

AnalyzerDemo.java:7: package org.apache.lucene.wordnet does not exist
import org.apache.lucene.wordnet.AnalyzerUtils;
                                ^
AnalyzerDemo.java:35: cannot find symbol
symbol  : variable AnalyzerUtils
location: class AnalyzerDemo
            AnalyzerUtils.displayTokens(analyzer, text);
            ^
Note: AnalyzerDemo.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
2 errors

I think library wordnet or AnalyzerUtils is not available. How can I install this part of lucene? Do you have any ideas? Why is that missing? I’ve installed lucene 3.5.0.

Answer 1

lucene-wordnet contrib module was removed in Lucene 3.4.0. AnalyzerUtils also doesn’t exist, so you either have to get Lucene 3.3.0 or write your own for 3.5.0 based on this one.