[limitations] J2S limitations

This page tries to summarize what we see as J2S limitations for MayLoon, and the solutions/workarounds available.

• Dependency handling for derived classes

If you try to construct an instance of derived class in the base class, j2s class loader will fail to find the derived class.

Workaroud: Use reflection to find the derived class.

Reference: git commit 989e3934f11bd8062b1945282b60584a90bdb0c1 - "Using java reflection to fix the former bug"

• No String.length()

Some java lib class implementation use this method, like Pattern.spit(CharSequence cs) which could not be replaced by String(str).length directly.

Workaround: Replace the parameter String to StringBuilder or StringBuffer works. CharSequence is an interface that has Length() method, and String is an implementation of CharSequence.

• Support for jave enum

Is not perfect.

Workaroud: Replace the enum with a class.

Reference: git commit aad5d452a809eef225729c1b64fb36ba4facc143

• Existing method is complained as undefined because of incorrect override signature

git commit 348556bf172d98562e2c9cde6d523bf85a95a2dc