leaningtech/cheerpj

Hello,
Should I expect, that I can compile pretty much all jar to js, using CheerpJ?

Today I decided to try this solution. I created a simple app with lucene-core:9.3.0. When I compile my jar, I see the following log:

~/cheerpj_2.3$ python3 ./cheerpjfy.py /mnt/c/Users/povaloh830/IdeaProjects/Test-Java11/build/libs/Test-Java11-1.0-SNAPSHOT.jar
Compiling jar  /mnt/c/Users/povaloh830/IdeaProjects/Test-Java11/build/libs/Test-Java11-1.0-SNAPSHOT.jar
compiling Main.class ...
Failure compiling Main.class
command: /home/povaloh830/cheerpj_2.3/bin/cheerpj -llvm -llvm-exceptions -cp /tmp/tmp_sadxwot/rt.jar.dir/ Main.class

Using legacy codegen for Main.class

But in the end I get my js file. Than I use html page from https://docs.leaningtech.com/cheerpj/Tutorial and try to run it. I get the following log:

CheerpJ is initializing
CheerpJ runtime ready

Unhandled exception N4java4lang20NullPointerException / loader.js:2403:12
Uncaught (in promise) org/apache/lucene/analysis/standard/StandardAnalyzer loader.js:551:28

Of course, I can run this program, when I use regular JVM.

The code of program:

import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.ByteBuffersDirectory;
import org.apache.lucene.store.Directory;

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

public class Main {


    static StandardAnalyzer analyzer = new StandardAnalyzer();
    static Directory memoryIndex = new ByteBuffersDirectory();

    public static List<Document> searchIndex(String inField, String queryString) throws ParseException, IOException {
        Query query = new QueryParser(inField, analyzer)
                .parse(queryString);

        IndexReader indexReader = DirectoryReader.open(memoryIndex);
        IndexSearcher searcher = new IndexSearcher(indexReader);
        TopDocs topDocs = searcher.search(query, 10);
        List<Document> documents = new ArrayList<>();
        for (ScoreDoc scoreDoc : topDocs.scoreDocs) {
            documents.add(searcher.doc(scoreDoc.doc));
        }

        return documents;
    }

    public static void main(String[] args) throws IOException, ParseException {
        IndexWriterConfig indexWriterConfig = new IndexWriterConfig(analyzer);
        IndexWriter writter = new IndexWriter(memoryIndex, indexWriterConfig);
        Document document = new Document();

        document.add(new TextField("title", "title", Field.Store.YES));
        document.add(new TextField("body", "bodyefw", Field.Store.YES));

        writter.addDocument(document);
        writter.close();

        List<Document> documents = searchIndex("title", "title");

        System.out.println(documents.get(0).get("body"));
    }
}

P.S. I also tried to run hello world app, and it works fine.