Import failing under 1.1.5 and 1.1.6RC1

Ruby JRuby
1

I have a class of the form “foo._2008_08_01.ClassName” and when I
require the file that has this import, I get the following error:

“NameError: cannot load Java class foo._2008_08_01”

I have tried with 1.1.5 and 1.1.6RC1 with the same results. Any idea
what might be going on here?

Thanks,
Chris

2

Chris W. wrote:

I have a class of the form “foo._2008_08_01.ClassName” and when I
require the file that has this import, I get the following error:

“NameError: cannot load Java class foo._2008_08_01”

I have tried with 1.1.5 and 1.1.6RC1 with the same results. Any idea
what might be going on here?

Ugh…first smack whoever put that in the package name. Done? We can
move on now. :slight_smile:

There are a few ways you should be able to access the class. Have you
tried import with “foo._2008_08_01.ClassName”? include_class? If neither
of those work we can find another way for you, probably something like
this:

cls = java.lang.Class.forName ‘foo._2008_08_01.ClassName’
ClassName = JavaUtilities.get_proxy_class(cls)

If you can come up with specs (for /spec/java_integration in
repo) we can look at making it work like you expect. File a bug.

  • Charlie

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3

Unfortunately, I don’t have control over that package; though, I have
Java programs that call that package, so I think it’s legal, if not
ugly.

I’ve tried import and include_class, and neither has worked. I think the
other suggestion won’t work, because the class loader won’t know that
class exists until I import it.

I’m happy to file a bug. What form should the specs take? Is the problem
that JRuby doesn’t like a package beginning with an underscore,
containing an underscore? Numbers? Only numbers? Etc.

Are there any other suggestions? I have to ship this by the end of next
week :frowning:

Thanks for your help,
Chris

On 12/4/08 11:40 AM, “Charles Oliver N.” [email protected]
wrote:

Chris W. wrote:

I have a class of the form “foo._2008_08_01.ClassName” and when I
require the file that has this import, I get the following error:

“NameError: cannot load Java class foo._2008_08_01”

I have tried with 1.1.5 and 1.1.6RC1 with the same results. Any idea
what might be going on here?

Ugh…first smack whoever put that in the package name. Done? We can
move on now. :slight_smile:

There are a few ways you should be able to access the class. Have you
tried import with “foo._2008_08_01.ClassName”? include_class? If neither
of those work we can find another way for you, probably something like
this:

cls = java.lang.Class.forName ‘foo._2008_08_01.ClassName’
ClassName = JavaUtilities.get_proxy_class(cls)

If you can come up with specs (for /spec/java_integration in
repo) we can look at making it work like you expect. File a bug.

  • Charlie

To unsubscribe from this list, please visit:

http://xircles.codehaus.org/manage_email
4

Hmm, seems the underscores were confusing the interpreter. I’ve always
imported without quotes around the class name, but when I did (per your
example), it worked like a charm.

Thanks for your help.

-chris

On 12/4/08 12:36 PM, “Charles Oliver N.” [email protected]
wrote:

There’s a bunch of specs under spec/java_integration that should serve
as good examples.

Have you tried it against 1.1.6RC1? It seems to work ok for me here…

[headius @ cnutter:~/projects/jruby]
â—† cat foo/_2008_12_05/MyClass.java
package foo._2008_12_05;

public class MyClass {}
[headius @ cnutter:~/projects/jruby]
â—† javac foo/_2008_12_05/MyClass.java
[headius @ cnutter:~/projects/jruby]
â—† CLASSPATH=. jruby -rjava -e “import ‘foo._2008_12_05.MyClass’; p
MyClass.new”
#<Java::Foo_2008_12_05::MyClass:0x5381298a
@java_object=foo._2008_12_05.MyClass@44594680>

Chris W. wrote:

>  require the file that has this import, I get the following error:
tried import with "foo._2008_08_01.ClassName"? include_class? If neither

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5

Chris W. wrote:

Hmm, seems the underscores were confusing the interpreter. I’ve always
imported without quotes around the class name, but when I did (per your
example), it worked like a charm.

Confirmed…can you file a bug for this pleeeeez?

[headius @ cnutter:~/projects/jruby]
â—† CLASSPATH=. jruby -rjava -e “import foo._2008_12_05.MyClass; p
MyClass.new”
-e:1: undefined local variable or method foo' for main:Object (NameError) [headius @ cnutter:~/projects/jruby] â—† CLASSPATH=. jruby -rjava -e "import Java::foo._2008_12_05.MyClass; p MyClass.new" /Users/headius/projects/jruby/lib/ruby/site_ruby/1.8/builtin/java/ast.rb:49:inget_proxy_or_package_under_package’: cannot load Java class
foo._2008_12_05 (NameError)
from
/Users/headius/projects/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/java.rb:43:in
`method_missing’
from -e:1

  • Charlie

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6

There’s a bunch of specs under spec/java_integration that should serve
as good examples.

Have you tried it against 1.1.6RC1? It seems to work ok for me here…

[headius @ cnutter:~/projects/jruby]
â—† cat foo/_2008_12_05/MyClass.java
package foo._2008_12_05;

public class MyClass {}
[headius @ cnutter:~/projects/jruby]
â—† javac foo/_2008_12_05/MyClass.java
[headius @ cnutter:~/projects/jruby]
â—† CLASSPATH=. jruby -rjava -e “import ‘foo._2008_12_05.MyClass’; p
MyClass.new”
#<Java::Foo_2008_12_05::MyClass:0x5381298a
@java_object=foo._2008_12_05.MyClass@44594680>

Chris W. wrote:

>  require the file that has this import, I get the following error:
tried import with "foo._2008_08_01.ClassName"? include_class? If neither

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7

http://jira.codehaus.org/browse/JRUBY-3218. Thanks as always for your
help, Charles. I’ll try to make the problem more interesting next time
:slight_smile:

-chris

On 12/4/08 1:33 PM, “Charles Oliver N.” [email protected]
wrote:

Chris W. wrote:

Hmm, seems the underscores were confusing the interpreter. I’ve always
imported without quotes around the class name, but when I did (per your
example), it worked like a charm.

Confirmed…can you file a bug for this pleeeeez?

[headius @ cnutter:~/projects/jruby]
â—† CLASSPATH=. jruby -rjava -e “import foo._2008_12_05.MyClass; p
MyClass.new”
-e:1: undefined local variable or method foo' for main:Object (NameError) [headius @ cnutter:~/projects/jruby] â—† CLASSPATH=. jruby -rjava -e "import Java::foo._2008_12_05.MyClass; p MyClass.new" /Users/headius/projects/jruby/lib/ruby/site_ruby/1.8/builtin/java/ast.rb:49:in get_proxy_or_package_under_package’: cannot load Java class
foo._2008_12_05 (NameError)
from
/Users/headius/projects/jruby/lib/ruby/site_ruby/1.8/builtin/javasupport/java.rb:43:in
`method_missing’
from -e:1

  • Charlie

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