plugins.config "Plugin or class not found:" exception

[Michael Doube]

Hi All

I'm having trouble getting tidy menu items for my plugins.

I followed the IJ-Eclipse best practice instructions from the IJ
conference in Luxembourg and started putting my plugins in packages,
e.g. in Fit_Sphere.java

package org.doube.bone_geometry;

But then I get lots of levels of menus before I can select a plugin,
which is a pain, e.g.:
Plugins>org>doube>bone_geometry>Fit Sphere

So I wrote a plugins.config file, using these instructions:
https://list.nih.gov/cgi-bin/wa?A2=ind0804&L=IMAGEJ&P=R5626&I=-3
http://imagejdocu.tudor.lu/doku.php?id=howto:plugins:howto_create_an_imagej_plugin_jar_file

But if I put this in my plugins.config:
Plugins>Bone Geometry, "Fit Sphere", org.doube.bone_geometry.Fit_Sphere("")

I get the menu entry Plugins>Bone Geometry>Fit Sphere, but running it
throws this exception:
Plugin or class not found: "org.doube.bone_geometry.Fit_Sphere
(java.lang.ClassNotFoundException: org.doube.bone_geometry.Fit_Sphere)

Bone_Geometry.jar is saved in ~/ImageJ/plugins/ and plugins.config is in
the root directory of the jar, and all the class files are in
/org/doube/bone_geometry/ within the jar.

How can I fix this?

Cheers

Mike

[Jeffrey B. Woodward]

When I package things, I put my jars that are equivalent to your
"Bone_Geometry.jar" in the directory ~/ImageJ/plugins/jars, and as you
said, I put the plugins.config in the root directory of said jar file.

Hope that helps/works for you,

-Woody


Michael Doube wrote:

> Hi All
>
> I'm having trouble getting tidy menu items for my plugins.
>
> I followed the IJ-Eclipse best practice instructions from the IJ
> conference in Luxembourg and started putting my plugins in packages,
> e.g. in Fit_Sphere.java
>
> package org.doube.bone_geometry;
>
> But then I get lots of levels of menus before I can select a plugin,
> which is a pain, e.g.:
> Plugins>org>doube>bone_geometry>Fit Sphere
>
> So I wrote a plugins.config file, using these instructions:
> https://list.nih.gov/cgi-bin/wa?A2=ind0804&L=IMAGEJ&P=R5626&I=-3
> http://imagejdocu.tudor.lu/doku.php?id=howto:plugins:howto_create_an_imagej_plugin_jar_file 
>
>
> But if I put this in my plugins.config:
> Plugins>Bone Geometry, "Fit Sphere",
> org.doube.bone_geometry.Fit_Sphere("")
>
> I get the menu entry Plugins>Bone Geometry>Fit Sphere, but running it
> throws this exception:
> Plugin or class not found: "org.doube.bone_geometry.Fit_Sphere
> (java.lang.ClassNotFoundException: org.doube.bone_geometry.Fit_Sphere)
>
> Bone_Geometry.jar is saved in ~/ImageJ/plugins/ and plugins.config is
> in the root directory of the jar, and all the class files are in
> /org/doube/bone_geometry/ within the jar.
>
> How can I fix this?
>
> Cheers
>
> Mike
>
>

[Michael Doube]

Jeffrey B. Woodward wrote:
> When I package things, I put my jars that are equivalent to your
> "Bone_Geometry.jar" in the directory ~/ImageJ/plugins/jars, and as you
> said, I put the plugins.config in the root directory of said jar file.
>
> Hope that helps/works for you,

Thanks Woody, but unfortunately it does not.

Mike

>
> -Woody
>
>
> Michael Doube wrote:
>> Hi All
>>
>> I'm having trouble getting tidy menu items for my plugins.
>>
>> I followed the IJ-Eclipse best practice instructions from the IJ
>> conference in Luxembourg and started putting my plugins in packages,
>> e.g. in Fit_Sphere.java
>>
>> package org.doube.bone_geometry;
>>
>> But then I get lots of levels of menus before I can select a plugin,
>> which is a pain, e.g.:
>> Plugins>org>doube>bone_geometry>Fit Sphere
>>
>> So I wrote a plugins.config file, using these instructions:
>> https://list.nih.gov/cgi-bin/wa?A2=ind0804&L=IMAGEJ&P=R5626&I=-3
>> http://imagejdocu.tudor.lu/doku.php?id=howto:plugins:howto_create_an_imagej_plugin_jar_file 
>>
>>
>> But if I put this in my plugins.config:
>> Plugins>Bone Geometry, "Fit Sphere",
>> org.doube.bone_geometry.Fit_Sphere("")
>>
>> I get the menu entry Plugins>Bone Geometry>Fit Sphere, but running it
>> throws this exception:
>> Plugin or class not found: "org.doube.bone_geometry.Fit_Sphere
>> (java.lang.ClassNotFoundException: org.doube.bone_geometry.Fit_Sphere)
>>
>> Bone_Geometry.jar is saved in ~/ImageJ/plugins/ and plugins.config is
>> in the root directory of the jar, and all the class files are in
>> /org/doube/bone_geometry/ within the jar.
>>
>> How can I fix this?
>>
>> Cheers
>>
>> Mike
>>
>>

[Albert Cardona]

>
>
> How can I fix this?


Is the class public? As in:
 
  public class Fit_Sphere ... { }

If you have a constructor other than the default--FitSphere() is the
default--, then you need to add the default as public, even if its body
is empty:

  public FitSphere() {}


Cheers, Albert

--
Albert Cardona
http://albert.rierol.net

[Volker Baecker]

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Hello,
I think there must be a misunderstanding somewhere. What I proposed in
the best practices workshop is to separate the implementation of the
plugin interface (let's call it A) from the code actually doing the work
(let's call it B). A should only care about plugin specific things and
use the api of B. A is in the default package and has an underscore in
the name. B is not in the default package. B can be distributed over
many packages each part being in a package according to what it does.

The main advantage of this scheme is that the functionality of your code
is available as a library, that can be used from any other code, without
passing by the ImageJ "run" mechanism.

To install your plugin, you can create a .jar containing all the
packages used by B and put the jar and the class file of A in a
subfolder of the plugin folder.

Best regards,
Volker Bäcker

Jeffrey B. Woodward a écrit :

> When I package things, I put my jars that are equivalent to your
> "Bone_Geometry.jar" in the directory ~/ImageJ/plugins/jars, and as you
> said, I put the plugins.config in the root directory of said jar file.
>
> Hope that helps/works for you,
>
> -Woody
>
>
> Michael Doube wrote:
>> Hi All
>>
>> I'm having trouble getting tidy menu items for my plugins.
>>
>> I followed the IJ-Eclipse best practice instructions from the IJ
>> conference in Luxembourg and started putting my plugins in packages,
>> e.g. in Fit_Sphere.java
>>
>> package org.doube.bone_geometry;
>>
>> But then I get lots of levels of menus before I can select a plugin,
>> which is a pain, e.g.:
>> Plugins>org>doube>bone_geometry>Fit Sphere
>>
>> So I wrote a plugins.config file, using these instructions:
>> https://list.nih.gov/cgi-bin/wa?A2=ind0804&L=IMAGEJ&P=R5626&I=-3
>> http://imagejdocu.tudor.lu/doku.php?id=howto:plugins:howto_create_an_imagej_plugin_jar_file
>>
>>
>> But if I put this in my plugins.config:
>> Plugins>Bone Geometry, "Fit Sphere",
>> org.doube.bone_geometry.Fit_Sphere("")
>>
>> I get the menu entry Plugins>Bone Geometry>Fit Sphere, but running it
>> throws this exception:
>> Plugin or class not found: "org.doube.bone_geometry.Fit_Sphere
>> (java.lang.ClassNotFoundException: org.doube.bone_geometry.Fit_Sphere)
>>
>> Bone_Geometry.jar is saved in ~/ImageJ/plugins/ and plugins.config is
>> in the root directory of the jar, and all the class files are in
>> /org/doube/bone_geometry/ within the jar.
>>
>> How can I fix this?
>>
>> Cheers
>>
>> Mike
>>
>>
>

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--
passerelle antivirus du campus CNRS de Montpellier
--

[Albert Cardona]

> How can I fix this?


More possible fixes:


- check that your jar file has an underscore in its name. Otherwise it's
not recognized as a plugin -- but I guess that is not the issue.


- From the javascript window (Plugins - New - Javascript...), try:
 
   print(Class.forName("org.doube.bone_geometry.Fit_Sphere"));

If the class is not found, the log window will throw an exception. This
at least will tell you that the ImageJ
classloader didn't pick up your jar, for some reason.


Some related comments:
 
- you don't need an underscore in the name of the class that implements
PlugIn, if you are using plugins.config

 - you don't need to call the plugin with an empty string for arguments
from the plugins.config,
  just use (note the lack of a trailing ("") ):

 Plugins>Bone Geometry, "Fit Sphere", org.doube.bone_geometry.Fit_Sphere


For example, this is what I use for TrakEM2's plugins.config:

 Plugins>TrakEM2, "New Project (from template)", ini.trakem2.New_Project


Albert

--
Albert Cardona
http://albert.rierol.net

[Michael Doube]

> - check that your jar file has an underscore in its name. Otherwise it's
> not recognized as a plugin -- but I guess that is not the issue.

It is called Bone_Geometry.jar

>
>
> - From the javascript window (Plugins - New - Javascript...), try:
>  
>    print(Class.forName("org.doube.bone_geometry.Fit_Sphere"));
I get:
sun.org.mozilla.javascript.internal.WrappedException: Wrapped
java.lang.ClassNotFoundException: org.doube.bone_geometry.Fit_Sphere
(<Unknown source>#1) in <Unknown source> at line number 1

>
> Some related comments:
>  
> - you don't need an underscore in the name of the class that implements
> PlugIn, if you are using plugins.config

I took the _ out, and called the class FitSphere, with no improvement.

>  - you don't need to call the plugin with an empty string for arguments
> from the plugins.config,
>   just use (note the lack of a trailing ("") ):

I took out the ("") too: no effect.

If I remove / rename plugins.config everything works fine, I just get a
deep menu to click through before I get to my plugins, so maybe I will
go back to that and do my best to observe Volker's design guidelines.

Thanks everyone,

Mike