location suggestions

import org.apache.lucene.analysis.de.GermanAnalyzer;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.*;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.search.spell.LuceneDictionary;
import org.apache.lucene.search.spell.SpellChecker;
import org.apache.lucene.search.suggest.Lookup;
import org.apache.lucene.search.suggest.analyzing.AnalyzingSuggester;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;

public class LuceneSpellCheckerDemoService {

    public static void main(String args[]) throws IOException {
        Directory luceneDirectory = new RAMDirectory();

        IndexWriter indexWriter = new IndexWriter(luceneDirectory, new IndexWriterConfig(new GermanAnalyzer()));
        indexWriter.addDocument(createBerlin());
        indexWriter.addDocument(createBremen());
        indexWriter.addDocument(createTues());
        indexWriter.addDocument(createTue());
        indexWriter.commit();
        indexWriter.close();

        SpellChecker spellChecker = new SpellChecker(new RAMDirectory());
        LuceneDictionary dictttt = new LuceneDictionary(DirectoryReader.open(luceneDirectory), "loc");
        spellChecker.indexDictionary(dictttt, new IndexWriterConfig(new StandardAnalyzer()), true);

        AnalyzingSuggester analyzingSuggester = new AnalyzingSuggester(new RAMDirectory(), "temp", new GermanAnalyzer());
        analyzingSuggester.build(dictttt);

        Arrays.asList(spellChecker.suggestSimilar("berlin", 5)).forEach(s -> System.out.println(s));
        spellChecker.close();

        List<Lookup.LookupResult> lookupResultList = analyzingSuggester.lookup("tue", false, 1);
        lookupResultList.forEach(s -> System.out.println(s.key));
    }

    private static Document createBerlin() {
        Document doc = new Document();

        String loc = "berlin";
        doc.add(new StringField("loc", loc, Field.Store.YES));
        doc.add(new FloatPoint("lat", 12.12F));
        doc.add(new FloatPoint("lon", 13.13F));

        return doc;
    }

    private static Document createTue() {
        Document doc = new Document();

        String loc = "Tübingen";
        doc.add(new StringField("loc", loc, Field.Store.YES));
        doc.add(new FloatPoint("lat", 12.12F));
        doc.add(new FloatPoint("lon", 13.13F));

        return doc;
    }

    private static Document createTues() {
        Document doc = new Document();

        String loc = "Tuesmekistan";
        doc.add(new StringField("loc", loc, Field.Store.YES));
        doc.add(new FloatPoint("lat", 12.12F));
        doc.add(new FloatPoint("lon", 13.13F));

        return doc;
    }

    private static Document createBremen() {
        Document doc = new Document();

        String loc = "bremen";
        doc.add(new StringField("loc", loc, Field.Store.YES));
        doc.add(new FloatPoint("lat", 14.12F));
        doc.add(new FloatPoint("lon", 14.13F));

        return doc;
    }

}