Having played with Linq (to SQL and Objects) as well as the Entity Framework from Microsoft recently, I was wondering what the non-.Net (specifically Java) equivalents are?
+2
A:
Java does not have a Linq equivalent. However Scala, a functional language that compiles to Java byte code, has something closes: an extended for loop syntax.
landon9720
2009-07-04 22:37:26
+5
A:
You might want to check out the quaere project. Its a java framework that adds a way to query collections, similar to how LINQ works.
nstehr
2009-07-04 22:46:30
Looks pretty interesting, and it can be layered on top of JPA too. It's pre-beta though (http://quaere.codehaus.org/Getting+started).
Jim Ferrans
2009-07-05 05:05:12
+3
A:
There is a Java project called JoSQL which provides object querying capabilities with a SQL-like syntax.
While I haven't used it myself, I know that it is used in some heavyweight applications.
hasalottajava
2009-07-05 00:30:28
This looks pretty interesting. It's not a database tool, but a way to use SQL to operate on Java objects (like LINQ to Objects).
Jim Ferrans
2009-07-05 05:15:33
+1
A:
For database-heavy work, SQLJ might be an option. The downside is it's not pure Java and requires a pre-processor.
ykaganovich
2009-07-05 02:34:35
+8
A:
Consider using Querydsl : http://source.mysema.com/display/querydsl/Querydsl
It supports JPA/Hibernate, JDO, SQL and Collections.
Querydsl is fully type-safe, supports autocomplete in IDEs and provides a common querying syntax on top multiple backends.
I am the maintainer of Querydsl, and I wrote a comparison to other frameworks some time ago.
It is slightly biased, but shows the different emphasis
- statically typed or not
- which backends are supported
- is the interface for query construction cascading or not
Newer frameworks experiment also with closure syntax.
Timo Westkämper
2010-01-17 18:42:58
Why is this being flagged as spam? As far as I can see answers the question.
Yacoby
2010-05-16 10:00:47
@Yacoby, see http://meta.stackoverflow.com/questions/50038/it-doesnt-matter-what-the-question-is-theres-only-one-answer (which has been resolved by Timo nicely, in my opinion)
Arjan
2010-05-16 12:57:28