static <E> E create(Jdbi db, Class<E> extensionType) {
ThreadLocal<E> threadExtension = new ThreadLocal<>();
InvocationHandler handler = (proxy, method, args) -> {
if (EQUALS_METHOD.equals(method)) {
return proxy == args[0];
}
if (HASHCODE_METHOD.equals(method)) {
return System.identityHashCode(proxy);
}
if (TOSTRING_METHOD.equals(method)) {
return extensionType + "@" + Integer.toHexString(System.identityHashCode(proxy));
}
if (threadExtension.get() != null) {
return invoke(threadExtension.get(), method, args);
}
return db.withExtension(extensionType, extension ->
JdbiThreadLocals.invokeInContext(threadExtension, extension,
() -> invoke(extension, method, args)));
};
return extensionType.cast(
Proxy.newProxyInstance(
extensionType.getClassLoader(),
new Class[]{extensionType}, handler));
}