Clojure Q&A - Recent questions and answers in java.data

Answered: clojure.java.data/from-java throws stack overflow

Thu, 20 Feb 2025 00:06:57 +0000

Christos,

Can you provide more detail on exactly how I can reproduce this?

Preferably, a small completely self-contained repo on GitHub with a README explaining the steps.

Without more information, I cannot even begin to figure out what might be going on here.

Answered: clojure.java.data.builder fails with overloaded setter

Wed, 22 Jan 2025 23:35:40 +0000

Since modelName is not supplied as a property, in this case it could just ignore that setter altogether -- so I consider that one bug (java.data will fail if there are overloaded setters that you don't care about).

In the case where you are trying to build with a property that is overloaded, java.data would have to perform some sort of overload resolution to try to pick a "best match" which would be fairly complex.

What it could do is pick one setter for which instance? is true of the parameter type and the property value -- and complain if more than one setter satisfies that. That would still be somewhat overprescriptive but it would be less restrictive than the status quo.

See https://clojure.atlassian.net/issues/JDATA-24 and https://clojure.atlassian.net/issues/JDATA-25

Answered: Should `(clojure.java.data/from-java-deep Class {})` work?

Wed, 03 Jan 2024 05:44:58 +0000

https://clojure.atlassian.net/browse/JDATA-23 -- I probably won't get to it this month, but the exact solution needs some analysis anyway.

Answered: Please update log4j

Mon, 13 Dec 2021 15:07:24 +0000

Aaah, I see. Just for the record, how I came to my wrong conclusion:

I deleted the log4j from my maven repository:

rm -rf ~/.m2/repository/org/apache/logging/log4j/

Ran my build:

$ clojure -X:depstar uberjar :jar target/foo.jar
Downloading: org/apache/logging/log4j/log4j-core/2.14.1/log4j-core-2.14.1.pom from central
Downloading: org/apache/logging/log4j/log4j/2.14.1/log4j-2.14.1.pom from central
Downloading: org/apache/logging/logging-parent/3/logging-parent-3.pom from central
Downloading: org/apache/logging/log4j/log4j-api/2.14.1/log4j-api-2.14.1.pom from central
Downloading: org/apache/logging/log4j/log4j-core/2.14.1/log4j-core-2.14.1.jar from central
Downloading: org/apache/logging/log4j/log4j-api/2.14.1/log4j-api-2.14.1.jar from central
...

And wondered why it downloads log4j?

And then I saw the update log4j again commit from Alex in the clojure/tools.logging
https://github.com/clojure/tools.logging/commit/8e8f899c00d79b03a7f5a3a83e52433d689feaf7
, (payed no attention to pom.xml) and missed that it's only in the dev profile of the project.clj, since it's higher up in the file and does not(!) get listed in the additions/deletions listing on github..

And now after being corrected I see that it's the build dependency on depstar in my deps.edn:

:aliases
 {:depstar
  {:replace-deps
   {com.github.seancorfield/depstar {:mvn/version "2.1.303"}}
   :ns-default hf.depstar
   :exec-args {}}}

which depends on log4j.

Thanks guys for helping me out.

Edit: formatting

Answered: java.data should support creating Properties from a map

Wed, 13 Oct 2021 22:43:42 +0000

Great idea!

Created in Jira as https://clojure.atlassian.net/browse/JDATA-22 -- will update this post when it is implemented.

Answered: from-java does not convert Boolean to clojure keyword