Jar InputStream to ASM ClassReader Generator Function

Main.java

/*
 * © Copyright 2015 -  SourceClear Inc
 */


import com.codepoetics.protonpack.StreamUtils;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.Opcodes;

import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarEntry;
import java.util.jar.JarInputStream;
import java.util.stream.Stream;

/**
 *
 */
public class Main {
  public static void main(String[] args) throws IOException {
    InputStream is = Main.class.getClassLoader().getResourceAsStream("dotclass.jar");
     StreamUtils.takeUntil(jarToClassReaders(is), x -> x == null).forEach( cr ->
         cr.accept(new ReflectionClassVisitor(Opcodes.ASM5), Opcodes.ASM5)
     );
  }

  static Stream<ClassReader> jarToClassReaders(InputStream jar) throws IOException {
    JarInputStream jis = new JarInputStream(jar);
    return Stream.generate(() -> {
      try {
        JarEntry jarEntry = jis.getNextJarEntry();
        if (jarEntry != null &&
            !jarEntry.isDirectory() &&
            jarEntry.getName().toLowerCase().endsWith(".class")) {
          ClassReader cr = new ClassReader(jis);
          return cr;
        }
      } catch (IOException e) {
        e.printStackTrace();
      }
      return null;
    });
  }
}