public static class TypeLibrary implements Library {
public void load(Ruby runtime, boolean wrap) throws IOException {
RubyModule jrubyType = runtime.defineModule("Type");
jrubyType.defineAnnotatedMethods(TypeLibrary.class);
}

@JRubyMethod(module = true)
public static IRubyObject coerce_to(ThreadContext context, IRubyObject self, IRubyObject object, IRubyObject clazz, IRubyObject method) {
Ruby ruby = object.getRuntime();

if (!(clazz instanceof RubyClass)) {
throw ruby.newTypeError(clazz, ruby.getClassClass());
}
if (!(method instanceof RubySymbol)) {
throw ruby.newTypeError(method, ruby.getSymbol());
}

RubyClass rubyClass = (RubyClass)clazz;
RubySymbol methodSym = (RubySymbol)method;

return TypeConverter.convertToTypeOrRaise(object, rubyClass, methodSym.asJavaString());
}
}