Find Lambda parameter types with serialization. Works only on serializable lambda

FindParametersTypes.java

package avaj.lang.invoke;

import java.io.*;
import java.lang.invoke.SerializedLambda;

import static java.nio.charset.StandardCharsets.ISO_8859_1;

public class FindParametersTypes {
  public static void main(String[] args) throws Exception {
    System.out.println(getMethodSignature((String s) -> s));
  }

  static <T, R> String getMethodSignature(MyFunction<T, R> lambda) throws Exception {
    String serializedLambdaName = SerializedLambda.class.getName();
    String replacementName = SerializedLamdb2.class.getName();

    byte[] serialized;
    try (ByteArrayOutputStream bos = new ByteArrayOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(bos)) {
      oos.writeObject(lambda);
      serialized = bos.toByteArray();
    }

    SerializedLamdb2 lamdbaDescription;
    try (ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(new String(serialized, ISO_8859_1).replace(serializedLambdaName, replacementName).getBytes(ISO_8859_1)))) {
      lamdbaDescription = (SerializedLamdb2) in.readObject();
    }

    return lamdbaDescription.implMethodSignature;
  }

  @FunctionalInterface
  static interface MyFunction<T, R> extends Serializable {
    R apply(T t);
  }
}

SerializedLamdb2.java

package avaj.lang.invoke;

import java.io.Serializable;

public class SerializedLamdb2 implements Serializable {
  private static final long serialVersionUID = 8025925345765570181L;

  public Class<?> capturingClass;
  public String functionalInterfaceClass;
  public String functionalInterfaceMethodName;
  public String functionalInterfaceMethodSignature;
  public String implClass;
  public String implMethodName;
  public String implMethodSignature;
  public int implMethodKind;
  public String instantiatedMethodType;
  public Object[] capturedArgs;
}