Re: [PATCH] ob-java

[John Herrlin <jherrlin@gmail.com>]

ian martins <ianxm@jhu.edu> writes:

>>
>> What do you think about having a configurable list where the user can
>> add =org-babel-java--import-maybe=? In my current use case I could then
>> add RxJava imports to that list and the imports could be removed from
>> the source code block.
>
>
> I think this can already be done. imports can be added to the headers, and
> babel allows file-wide headers, so you could add a =#+HEADER: :import
> rx.Observable= line to the file and all source blocks would get it.  it's
> slightly different in that =org-babel-java--import-maybe= skips imports
> that it thinks aren't needed. also if there are any non-java source blocks
> in the same file, these imports could be added to them which would be bad,
> so when mixing multiple languages in the same file this wouldn't be an
> option.

Thanks for pointing that out! It work just fine!

>
> NIT
>> Some spacing when writing =public static...=
>>
>
> Thanks for fixing the spacing. I don't think I can give you credit for the
> patch, though, without leaving it out until ob-java is accepted.

I dont need any credits, the important part is the result!

I have made a couple of more runs and I cant find anything that doesnt
work!

>
> On Wed, Oct 21, 2020 at 1:59 AM John Herrlin <jherrlin@gmail.com> wrote:
>
>>
>> I did and it looks really good. The difference in this example:
>>
>>     #+BEGIN_SRC java
>>       import rx.Observable;
>>
>>       Observable.range(5, 3)
>>           .subscribe((Integer i) ->   { System.out.println("Got: " + i); },
>>                      (Throwable t) -> { t.printStackTrace();},
>>                      () ->            { System.out.println("Ending
>> stream"); });
>>     #+END_SRC
>>
>> from the ones I posted yesterday is tremendous!
>>
>> I am not very experienced with Emacs lisp but I think it's pretty easy
>> to understand how things works and follow the code. The comments are
>> also of good help. I really appreciate the work you have done!
>>
>>
>> What do you think about having a configurable list where the user can
>> add =org-babel-java--import-maybe=? In my current use case I could then
>> add RxJava imports to that list and the imports could be removed from
>> the source code block.
>>
>>
>> NIT
>>
>> Some spacing when writing =public static...=
>>
>>    #+BEGIN_SRC diff
>>      diff --git a/lisp/ob-java.el b/lisp/ob-java.el
>>      index 94c3f69cf..4f3904871 100644
>>      --- a/lisp/ob-java.el
>>      +++ b/lisp/ob-java.el
>>      @@ -220,7 +220,7 @@ RESULT-FILE is the temp file to write the result."
>>             (org-babel-java--move-past org-babel-java--class-re)
>>             (insert "\n    public static void main(String[] args) {
>>               System.out.print(\"success\");
>>      -}\n\n"))
>>      +    }\n\n"))
>>
>>           ;; special handling to return value
>>           (when (eq result-type 'value)
>>    #+END_SRC
>>
>>
>>
>> ian martins <ianxm@jhu.edu> writes:
>>
>> > Thanks for testing, and thanks for pointing that out. I will fix it so
>> that
>> > `public` is optional.
>> >
>> > btw, in your example you didn't have to specify `:classname` since you
>> > defined the class name in the source block.
>> >
>> > btw2, did you notice that you can C-c C-c on source blocks that don't
>> have
>> > main methods and it'll compile without error?
>> >
>> > On Tue, Oct 20, 2020 at 3:17 PM John Herrlin <jherrlin@gmail.com> wrote:
>> >
>> >>
>> >> Hey,
>> >>
>> >> Did some debugging and found out that my class didn't contained =public=
>> >> and the patch requires it to be.
>> >>
>> >> This works fine:
>> >>
>> >>    #+HEADER: :classname Main
>> >>    #+HEADER: :dir src
>> >>    #+HEADER: :cmdline -classpath ./rxjava-1.3.8.jar:.
>> >>    #+HEADER: :cmpflag -classpath ./rxjava-1.3.8.jar
>> >>    #+BEGIN_SRC java :results output code
>> >>      import rx.Observable;
>> >>      public class Main {
>> >>          public static void main(String[] args) {
>> >>              Observable.range(5, 5)
>> >>                  .subscribe(System.out::println);
>> >>          }
>> >>      }
>> >>    #+END_SRC
>> >>
>> >>
>> >>
>> >>
>> >> ian martins <ianxm@jhu.edu> writes:
>> >>
>> >> > I noticed that the tests didn't run with "make test." This updates the
>> >> > patch so that they can. I didn't add java to the list of default
>> >> languages
>> >> > because the java tests are slow.
>> >> >
>> >> > On Mon, Oct 5, 2020 at 9:23 AM ian martins <ianxm@jhu.edu> wrote:
>> >> >
>> >> >> I wrote those examples in an org file so I could test as I wrote
>> them,
>> >> and
>> >> >> then exported it to make it more readable, but the export resulted in
>> >> >> source block headers being lost.  Here is the same without export:
>> >> >> ----
>> >> >> * Changes
>> >> >>
>> >> >> - support for functional mode (~:results value~)
>> >> >> - accept variables
>> >> >> - don't require package, class, and main definitions
>> >> >> - write source and result tempfiles to
>> ~org-babel-temporary-directory~,
>> >> >> but respects the ~:dir~ header
>> >> >> - work with tramp
>> >> >>
>> >> >> * Examples
>> >> >> ** Example 1
>> >> >> This outputs "hello."  If class and main definitions aren't given the
>> >> >> code block will be wrapped in generic ones.
>> >> >>
>> >> >> #+begin_src java :results output silent
>> >> >>   System.out.print("hello");
>> >> >> #+end_src
>> >> >>
>> >> >> This is exactly equivalent:
>> >> >>
>> >> >> #+begin_src java :results output silent
>> >> >>   public class Main {
>> >> >>       public static void main(String[] args) {
>> >> >>           System.out.print("hello");
>> >> >>       }
>> >> >>   }
>> >> >> #+end_src
>> >> >>
>> >> >> ** Example 2
>> >> >> This also outputs "hello."
>> >> >>
>> >> >> #+begin_src java :results value silent
>> >> >>   return "hello";
>> >> >> #+end_src
>> >> >>
>> >> >> ** Example 3
>> >> >> This generates the class "Example" in the package "org.orgmode" in
>> the
>> >> >> current directory.
>> >> >>
>> >> >> #+begin_src java :results output silent :classname
>> org.orgmode.Example
>> >> >> :dir .
>> >> >>   System.out.print("hello, org-mode");
>> >> >> #+end_src
>> >> >>
>> >> >> ** Example 4
>> >> >> The "Hey" class defines a static method but no main. C-c C-c on the
>> >> >> "Hey" source block will write "./org/orgmode/Hey.java" and compile
>> it.
>> >> >>
>> >> >> The "Main" class calls the "Hey" class. C-c C-c on the "Main" source
>> >> >> block will write "./org/orgmode/Main.java" and compile and run it.
>> >> >>
>> >> >> #+begin_src java :results output silent :dir .
>> >> >>   package org.orgmode;
>> >> >>
>> >> >>   public class Hey {
>> >> >>       public static String say() {
>> >> >>           return "hey";
>> >> >>       }
>> >> >>   }
>> >> >> #+end_src
>> >> >>
>> >> >> #+begin_src java :results output silent :dir .
>> >> >>   package org.orgmode;
>> >> >>
>> >> >>   public class Main {
>> >> >>       public static void main(String[] args) {
>> >> >>           System.out.print(Hey.say());
>> >> >>       }
>> >> >>   }
>> >> >> #+end_src
>> >> >>
>> >> >> Instead of C-c C-c, we could have added tangle headers and written
>> the
>> >> >> source files out by tangling.
>> >> >>
>> >> >> ** Example 5
>> >> >> This prints the variable from the header
>> >> >>
>> >> >> #+begin_src java :var msg="hello, org-mode" :results output silent
>> >> >>   System.out.print(msg);
>> >> >> #+end_src
>> >> >>
>> >> >> ** Example 6
>> >> >> This prints "hello, org-mode." The table is provided to the method
>> as a
>> >> >> list of lists.
>> >> >>
>> >> >> #+name: table
>> >> >> | message | hello, org-mode  |
>> >> >>
>> >> >> #+begin_src java :var tbl=table :results output silent
>> >> >>   System.out.print(tbl.get(0).get(1));
>> >> >> #+end_src
>> >> >>
>> >> >> ** Example 7
>> >> >> This example returns a list.
>> >> >>
>> >> >> Note that you're allowed to specify imports without defining the
>> class
>> >> >> or main methods.
>> >> >>
>> >> >> #+begin_src java :results value :exports both
>> >> >>   import java.util.Arrays;
>> >> >>
>> >> >>   return Arrays.asList("message", "hello, org-mode");
>> >> >> #+end_src
>> >> >>
>> >> >> #+RESULTS:
>> >> >> | message | hello, org-mode |
>> >> >>
>> >> >> On Mon, Oct 5, 2020 at 8:35 AM ian martins <ianxm@jhu.edu> wrote:
>> >> >>
>> >> >>> 1 Changes
>> >> >>> =========
>> >> >>>
>> >> >>>   - support for functional mode (`:results value')
>> >> >>>   - accept variables
>> >> >>>   - don't require package, class, and main definitions
>> >> >>>   - write source and result tempfiles to
>> >> >>>     `org-babel-temporary-directory', but respects the `:dir' header
>> >> >>>   - work with tramp
>> >> >>>
>> >> >>>
>> >> >>> 2 Examples
>> >> >>> ==========
>> >> >>> Some examples follow.  See the tests for more examples.  I'll write
>> >> >>> proper docs after review.
>> >> >>>
>> >> >>> 2.1 Example 1
>> >> >>> ~~~~~~~~~~~~~
>> >> >>>
>> >> >>>   This outputs "hello."  If class and main definitions aren't given
>> the
>> >> >>>   code block will be wrapped in generic ones.
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | System.out.print("hello");
>> >> >>>   `----
>> >> >>>
>> >> >>>   This is exactly equivalent:
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | public class Main {
>> >> >>>   |     public static void main(String[] args) {
>> >> >>>   |         System.out.print("hello");
>> >> >>>   |     }
>> >> >>>   | }
>> >> >>>   `----
>> >> >>>
>> >> >>>
>> >> >>> 2.2 Example 2
>> >> >>> ~~~~~~~~~~~~~
>> >> >>>
>> >> >>>   This also outputs "hello."
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | return "hello";
>> >> >>>   `----
>> >> >>>
>> >> >>>
>> >> >>> 2.3 Example 3
>> >> >>> ~~~~~~~~~~~~~
>> >> >>>
>> >> >>>   This generates the class "Example" in the package "org.orgmode" in
>> >> the
>> >> >>>   current directory.
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | System.out.print("hello, org-mode");
>> >> >>>   `----
>> >> >>>
>> >> >>>
>> >> >>> 2.4 Example 4
>> >> >>> ~~~~~~~~~~~~~
>> >> >>>
>> >> >>>   The "Hey" class defines a static method but no main. C-c C-c on
>> the
>> >> >>>   "Hey" source block will write "./org/orgmode/Hey.java" and compile
>> >> it.
>> >> >>>
>> >> >>>   The "Main" class calls the "Hey" class. C-c C-c on the "Main"
>> source
>> >> >>>   block will write "./org/orgmode/Main.java" and compile and run it.
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | package org.orgmode;
>> >> >>>   |
>> >> >>>   | public class Hey {
>> >> >>>   |     public static String say() {
>> >> >>>   |         return "hey";
>> >> >>>   |     }
>> >> >>>   | }
>> >> >>>   `----
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | package org.orgmode;
>> >> >>>   |
>> >> >>>   | public class Main {
>> >> >>>   |     public static void main(String[] args) {
>> >> >>>   |         System.out.print(Hey.say());
>> >> >>>   |     }
>> >> >>>   | }
>> >> >>>   `----
>> >> >>>
>> >> >>>   Instead of C-c C-c, we could have added tangle headers and written
>> >> the
>> >> >>>   source files out by tangling.
>> >> >>>
>> >> >>>
>> >> >>> 2.5 Example 5
>> >> >>> ~~~~~~~~~~~~~
>> >> >>>
>> >> >>>   This prints the variable from the header
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | System.out.print(msg);
>> >> >>>   `----
>> >> >>>
>> >> >>>
>> >> >>> 2.6 Example 6
>> >> >>> ~~~~~~~~~~~~~
>> >> >>>
>> >> >>>   This prints "hello, org-mode." The table is provided to the
>> method as
>> >> >>>   a list of lists.
>> >> >>>
>> >> >>>    message  hello, org-mode
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | System.out.print(tbl.get(0).get(1));
>> >> >>>   `----
>> >> >>>
>> >> >>>
>> >> >>> 2.7 Example 7
>> >> >>> ~~~~~~~~~~~~~
>> >> >>>
>> >> >>>   This example returns a list.
>> >> >>>
>> >> >>>   Note that you're allowed to specify imports without defining the
>> >> class
>> >> >>>   or main methods.
>> >> >>>
>> >> >>>   ,----
>> >> >>>   | import java.util.Arrays;
>> >> >>>   |
>> >> >>>   | return Arrays.asList("message", "hello, org-mode");
>> >> >>>   `----
>> >> >>>
>> >> >>>    message  hello, org-mode
>> >> >>>
>> >> >>
>> >>
>>