Anonymous class as a custom tuple about jinq HOT 6 OPEN

Jinq has a potential to be the best (the only really good) Java ORM. Why it's not super-popular? 😄

from jinq.

Writing database queries in Java/C#/etc just generally stopped being popular. Microsoft doesn’t even push LINQ that much even more. Using LINQ or Jinq skillfully requires programmers to understand SQL anyway, so it’s probably easier to just work with a SQL-like language entirely instead of forcing programmers to learn an entirely different query language.

Also, the technology behind Jinq is obscure, so I’m basically the only person who can code it up right now. The big software vendors don’t have the expertise to add Jinq-like functionality to their own ORMs, so they have no reason to promote such technology. Without strong demand, there’s no reason for the big software vendors to train up someone with the required compiler/VM/database/symbolic-execution expertise. Right now, the big software vendors are more interested in pushing NoSQL and AI and big data and stuff.

from jinq.

Okay, that’s good to know. I’ll keep it in mind as a possible future feature. It would require writing a bunch of new analysis code for classes to see if they satisfy the usage patterns that you’ve shown. I’ve been thinking about how the framework could be modified to handle stuff like that before. Unfortunately, to be honest, I haven’t had the cycles available to add major features to Jinq in several years, so I probably won’t be able to get to it.

from jinq.

Jinq is normal Java code. Java does not support duck typing or other features needed to get your suggested syntax to work, so Jinq cannot support such functionality.

from jinq.

@my2iu I like jinq very much, it's amazing, Thank you and all the developers.

For mysql and h2, it works very well.
Recently, I am trying to adapt spanner, and it is going very well so far.

from jinq.

import java.util.function.*;

public class MyClass {
    public static void main(String args[]) {
        var a = new A<Integer>();
        var b = a.map(x -> new Object() { int v = x; })
                 .map(o -> new Object() { String s = Integer.toString(o.v); });
    }
}

class A<T> {
    public <R> A<R> map(Function<T, R> f) { return new A<R>(); }
}

This is compilable with Java 10+

UPD:
And without var it works with Java 8:

A<Integer> a = new A<Integer>();
A<String> b = a.map(x -> new Object() { int v = x; })
               .map(o -> new Object() { String s = Integer.toString(o.v); })
               .map(o -> o.s);

from jinq.