Problems with getValue

musicdenotation · April 9, 2014, 5:11am

I can’t figure out what I’m doing wrong here. The Java code works. All
the Ruby permutations return nil. How can I get the names I want?

Thanks!

=== deleteme.java ===
import java.io.;
import javax.swing.;

class Deleteme {
public static void main(String args[]) throws IOException {
String str;
str =
(String)TransferHandler.getCutAction().getValue(Action.NAME);
System.out.println("Cut action name is: " + str);
str =
(String)TransferHandler.getCopyAction().getValue(Action.NAME);
System.out.println("Copy action name is: " + str);
str =
(String)TransferHandler.getPasteAction().getValue(Action.NAME);
System.out.println("Paste action name is: " + str);
}
}
=== END deleteme.java ===

$ javac deleteme.java
$ java Deleteme
Cut action name is: cut
Copy action name is: copy
Paste action name is: paste

=== deleteme.rb ===
require ‘java’

Easier way to do this at file scope? Normally I would just

include_package

‘javax.swing’ in my class.

java_import javax.swing.TransferHandler
java_import javax.swing.Action

name = TransferHandler.getCutAction.getValue(Action.NAME)
puts “Cut action name is: #{name}”
name = TransferHandler.getCopyAction.getValue(Action.NAME)
puts “Copy action name is: #{name}”
name = TransferHandler.getPasteAction.getValue(Action.NAME)
puts “Paste action name is: #{name}”

try really hard

action = TransferHandler.getCutAction
name = action.java_send(:getValue, [java.lang.String], Action.NAME)
puts “Cut action #{action.inspect} name is: #{name}”

try another way; doesn’t work because getValue takes an argument

#name = TransferHandler.getCutAction.value(Action.NAME)
#puts “Cut action name is: #{name}”

try another way

meth = action.java_method(:getValue, [java.lang.String])
puts “Cut action name is: #{meth.call(Action.NAME)}”
puts “Cut action name is: #{meth.call(Action.NAME.to_java)}”
=== END deleteme.rb ===

$ jruby deleteme.rb
Cut action name is:
Copy action name is:
Paste action name is:
Cut action #Java::JavaxSwing::TransferAction:0x7548c02f name is:
Cut action name is:
Cut action name is:
$ jruby --version
jruby 1.7.4 (1.9.3p392) 2013-05-16 2390d3b on OpenJDK 64-Bit Server VM
1.6.0_22-b22 [linux-amd64]

C:.…> jruby deleteme.rb
[all names still nil]
C:.…> jruby --version
jruby 1.7.10 (1.9.3p392) 2014-01-09 c4ecd6b on Java HotSpot™ Client
VM 1.6.0_37-b06 [Windows 7-x86]

Ryan H.
L-3 Communications / Communication Systems West
[email protected]

unknown · April 9, 2014, 3:47pm

wow. Can you report this as an issue on our github project? I can
confirm
this does not work. My guess is getValue is public in the interface but
non-public in the concrete class of TransferAction. We actually use
reflection to get around these odd cases so I don’t understand why this
is
not working.

-Tom

unknown · April 9, 2014, 4:21pm

Yeah, this is really interesting. I wrote a test script at
Illustrates JRuby Swing Action issues. · GitHub that also illustrates
that
the Action’s method names are not rubified, i.e. getValue cannot be
accessed as value. I got the same result in JRuby 1.7.1 and 1.7.9.

Keith

unknown · April 9, 2014, 4:46pm

Yeah, it could be something to do with the inner class relationship too.
Amazed we have not seen this one before. Lots of a folks have done
Swing
stuff using JRuby.

-Tom

unknown · April 9, 2014, 6:40pm

I tried to report it on GitHub yesterday, but the buttons weren’t
working. I suspect the corporate firewall/mandated browser are to
blame. I’ll try tonight from home unless someone beats me to it.

Is there any way I can work around it for now (besides writing Java code
:-)?

Ryan

From: Thomas E Enebo [mailto:[email protected]]
Sent: Wednesday, April 09, 2014 7:37 AM
To: [email protected]
Subject: Re: [jruby-user] Problems with getValue

wow. Can you report this as an issue on our github project? I can
confirm this does not work. My guess is getValue is public in the
interface but non-public in the concrete class of TransferAction. We
actually use reflection to get around these odd cases so I don’t
understand why this is not working.
-Tom

On Tue, Apr 8, 2014 at 10:10 PM,
<[email protected]mailto:[email protected]> wrote:
I can’t figure out what I’m doing wrong here. The Java code works. All
the Ruby permutations return nil. How can I get the names I want?

Thanks!

=== deleteme.java ===
import java.io.;
import javax.swing.;

class Deleteme {
public static void main(String args[]) throws IOException {
String str;
str =
(String)TransferHandler.getCutAction().getValue(Action.NAME);
System.out.println("Cut action name is: " + str);
str =
(String)TransferHandler.getCopyAction().getValue(Action.NAME);
System.out.println("Copy action name is: " + str);
str =
(String)TransferHandler.getPasteAction().getValue(Action.NAME);
System.out.println("Paste action name is: " + str);
}
}
=== END deleteme.java ===

$ javac deleteme.java
$ java Deleteme
Cut action name is: cut
Copy action name is: copy
Paste action name is: paste

=== deleteme.rb ===
require ‘java’

Easier way to do this at file scope? Normally I would just

include_package

‘javax.swing’ in my class.

java_import javax.swing.TransferHandler
java_import javax.swing.Action

name = TransferHandler.getCutAction.getValue(Action.NAME)
puts “Cut action name is: #{name}”
name = TransferHandler.getCopyAction.getValue(Action.NAME)
puts “Copy action name is: #{name}”
name = TransferHandler.getPasteAction.getValue(Action.NAME)
puts “Paste action name is: #{name}”

try really hard

action = TransferHandler.getCutAction
name = action.java_send(:getValue, [java.lang.String], Action.NAME)
puts “Cut action #{action.inspect} name is: #{name}”

try another way; doesn’t work because getValue takes an argument

#name = TransferHandler.getCutAction.value(Action.NAME)
#puts “Cut action name is: #{name}”

try another way

meth = action.java_method(:getValue, [java.lang.String])
puts “Cut action name is: #{meth.call(Action.NAME)}”
puts “Cut action name is: #{meth.call(Action.NAME.to_java)}”
=== END deleteme.rb ===

$ jruby deleteme.rb
Cut action name is:
Copy action name is:
Paste action name is:
Cut action #Java::JavaxSwing::TransferAction:0x7548c02f name is:
Cut action name is:
Cut action name is:
$ jruby --version
jruby 1.7.4 (1.9.3p392) 2013-05-16 2390d3b on OpenJDK 64-Bit Server VM
1.6.0_22-b22 [linux-amd64]

C:.…> jruby deleteme.rb
[all names still nil]
C:.…> jruby --version
jruby 1.7.10 (1.9.3p392) 2014-01-09 c4ecd6b on Java HotSpot™ Client
VM 1.6.0_37-b06 [Windows 7-x86]

Ryan H.
L-3 Communications / Communication Systems West
[email protected]

unknown · April 9, 2014, 7:43pm

If you can dig out the java_object from the TransferHandler you should
be
able to use Java reflection APIs + setAccessible. If you search for
JRuby
setAccessible something might turn up. It is pretty gruesome workaround
but it should work.

-Tom

unknown · April 9, 2014, 4:29pm

Might it be an issue with JRuby’s handling of inner classes in Java?

JRuby reports that the action is an instance
ofJava::JavaxSwing::TransferAction,
whereas a web page at
http://www.cs.rit.edu/usr/local/pub/swm/jdoc1.6.0_19/javax/swing/TransferHandler.TransferAction.htmlsays
that TransferAction is an inner class of TransferHandler.

Keith

unknown · April 9, 2014, 11:55pm

That does sound gruesome. I have a less-gruesome (but more evil) hack
implemented right now. I’ll submit the bug report, and hopefully the
hack will last long enough for the bug to be fixed and released.

Thanks!

Ryan

From: Thomas E Enebo [mailto:[email protected]]
Sent: Wednesday, April 09, 2014 11:42 AM
To: [email protected]
Subject: Re: [jruby-user] Problems with getValue

If you can dig out the java_object from the TransferHandler you should
be able to use Java reflection APIs + setAccessible. If you search for
JRuby setAccessible something might turn up. It is pretty gruesome
workaround but it should work.
-Tom

On Wed, Apr 9, 2014 at 11:35 AM,
<[email protected]mailto:[email protected]> wrote:
I tried to report it on GitHub yesterday, but the buttons weren’t
working. I suspect the corporate firewall/mandated browser are to
blame. I’ll try tonight from home unless someone beats me to it.

Is there any way I can work around it for now (besides writing Java code
:-)?

Ryan

From: Thomas E Enebo
[mailto:[email protected]mailto:[email protected]]
Sent: Wednesday, April 09, 2014 7:37 AM
To: [email protected]mailto:[email protected]
Subject: Re: [jruby-user] Problems with getValue

wow. Can you report this as an issue on our github project? I can
confirm this does not work. My guess is getValue is public in the
interface but non-public in the concrete class of TransferAction. We
actually use reflection to get around these odd cases so I don’t
understand why this is not working.
-Tom

On Tue, Apr 8, 2014 at 10:10 PM,
<[email protected]mailto:[email protected]> wrote:
I can’t figure out what I’m doing wrong here. The Java code works. All
the Ruby permutations return nil. How can I get the names I want?

Thanks!

=== deleteme.java ===
import java.io.;
import javax.swing.;

class Deleteme {
public static void main(String args[]) throws IOException {
String str;
str =
(String)TransferHandler.getCutAction().getValue(Action.NAME);
System.out.println("Cut action name is: " + str);
str =
(String)TransferHandler.getCopyAction().getValue(Action.NAME);
System.out.println("Copy action name is: " + str);
str =
(String)TransferHandler.getPasteAction().getValue(Action.NAME);
System.out.println("Paste action name is: " + str);
}
}
=== END deleteme.java ===

$ javac deleteme.java
$ java Deleteme
Cut action name is: cut
Copy action name is: copy
Paste action name is: paste

=== deleteme.rb ===
require ‘java’

Easier way to do this at file scope? Normally I would just

include_package

‘javax.swing’ in my class.

java_import javax.swing.TransferHandler
java_import javax.swing.Action

name = TransferHandler.getCutAction.getValue(Action.NAME)
puts “Cut action name is: #{name}”
name = TransferHandler.getCopyAction.getValue(Action.NAME)
puts “Copy action name is: #{name}”
name = TransferHandler.getPasteAction.getValue(Action.NAME)
puts “Paste action name is: #{name}”

try really hard

action = TransferHandler.getCutAction
name = action.java_send(:getValue, [java.lang.String], Action.NAME)
puts “Cut action #{action.inspect} name is: #{name}”

try another way; doesn’t work because getValue takes an argument

#name = TransferHandler.getCutAction.value(Action.NAME)
#puts “Cut action name is: #{name}”

try another way

meth = action.java_method(:getValue, [java.lang.String])
puts “Cut action name is: #{meth.call(Action.NAME)}”
puts “Cut action name is: #{meth.call(Action.NAME.to_java)}”
=== END deleteme.rb ===

$ jruby deleteme.rb
Cut action name is:
Copy action name is:
Paste action name is:
Cut action #Java::JavaxSwing::TransferAction:0x7548c02f name is:
Cut action name is:
Cut action name is:
$ jruby --version
jruby 1.7.4 (1.9.3p392) 2013-05-16 2390d3b on OpenJDK 64-Bit Server VM
1.6.0_22-b22 [linux-amd64]

C:.…> jruby deleteme.rb
[all names still nil]
C:.…> jruby --version
jruby 1.7.10 (1.9.3p392) 2014-01-09 c4ecd6b on Java HotSpot™ Client
VM 1.6.0_37-b06 [Windows 7-x86]

Ryan H.
L-3 Communications / Communication Systems West
[email protected]

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