Null pointer issue : JavaImpl in non public class inheriting an interface

[मृदुल मनोहर मिश्र]

Hi,

  I have been getting a NullPointer error whenever I try to execute JavaImpl in a non public (package access class) inheriting an interface. The split window shows all the methods that need to be implemented in new class but as soon as I hit enter, it  throws null pointer error. Here is a skeleton code which will throw the error, interestingly if I implement interface in public class (e.g. TestImpl below) I don't see the error. I am running ArchLinux, PingEclim gives output 'eclim 2.6.0, eclipse 4.6.1). Installed java version is :

aur/jdk 8u112-1 [installed] (719) (11.21)

    Oracle Java Development Kit

Code : 

package org.implerror;

interface Interface1 {

    void method1();

}

class Class1 implements Interface1 {

/* Executing :JavaImpl here */

}

/* Having this skeleton doesn't impact the behavior

public class TestImpl {

    public static void main(String[] args) {

    }

}

*/

NullPointer error:

2016-11-19 12:28:44,211 ERROR [org.eclim.command.Main] Command failed

java.lang.NullPointerException

        at org.eclim.plugin.jdt.command.impl.ImplCommand.getSibling(ImplCommand.java:455)

        at org.eclim.plugin.jdt.command.impl.ImplCommand.insertMethods(ImplCommand.java:359)

        at org.eclim.plugin.jdt.command.impl.ImplCommand.execute(ImplCommand.java:105)

        at org.eclim.command.Main$1.run(Main.java:100)

        at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)

        at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)

        at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4528)

        at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4146)

        at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)

        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)

        at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)

        at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)

        at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:687)

        at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)

        at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:604)

        at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)

        at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)

        at org.eclim.eclipse.EclimApplication.start(EclimApplication.java:128)

        at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)

        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)

        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)

        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)

        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

        at java.lang.reflect.Method.invoke(Method.java:498)

        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)

        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)

        at org.eclipse.equinox.launcher.Main.run(Main.java:1519)

        at org.eclipse.equinox.launcher.Main.main(Main.java:1492)

NGSession 2: 127.0.0.1: org.eclim.command.Main exited with status 1

[मृदुल मनोहर मिश्र]

Also I have installed eclim via aur.

aur/eclim 2.6.0-1 [installed] (114) (2.37)

    Brings Eclipse functionality to Vim

Thanks,

Mridul

[Eric Van Dewoestine]

> ...

So far I can't reproduce this. Based on the error it looks like the
type for the file couldn't be determined, but I can't replicate that
case. Can you try running

:let g:EclimLogLevel = 'trace'

Then run the command again and try to add a method. Then send met the
result of running:

:messages

If you can do this using the same example you provided above, that
would be ideal, so I can compare against my version of that example.

--
eric

[मृदुल मनोहर मिश्र]

Thanks for your reply Eric.

I followed the steps mentioned by you and this is what I get:

:messages output on vim:

Messages maintainer: Bram Moolenaar <Br...@vim.org>

"TestImpl.java" 18L, 302C

(0s) system: "/usr/lib/eclipse/plugins/org.eclim_2.6.0/bin/eclim" --nailgun-server localhost --nailgun-port 9091 -editor vim -command projects

(0s) system: "/usr/lib/eclipse/plugins/org.eclim_2.6.0/bin/eclim" --nailgun-server localhost --nailgun-port 9091 -editor vim -command java_impl -p "TIJ4P" -f "src/java/org/implerror/TestImpl.java" -o 107 -e u

tf-8

(0s) system: "/usr/lib/eclipse/plugins/org.eclim_2.6.0/bin/eclim" --nailgun-server localhost --nailgun-port 9091 -editor vim -command java_impl -p "TIJ4P" -f "src/java/org/implerror/TestImpl.java" -t "org.imp

lerror.Class1" -s "org.implerror.Interface1" -m '["method1()"]'

java.lang.NullPointerException

^Iat org.eclim.plugin.jdt.command.impl.ImplCommand.getSibling(ImplCommand.java:455)

^Iat org.eclim.plugin.jdt.command.impl.ImplCommand.insertMethods(ImplCommand.java:359)

^Iat org.eclim.plugin.jdt.command.impl.ImplCommand.execute(ImplCommand.java:105)

^Iat org.eclim.command.Main$1.run(Main.java:100)

^Iat org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)

^Iat org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:182)

^Iat org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4528)

^Iat org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4146)

^Iat org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1121)

^Iat org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)

^Iat org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1022)

^Iat org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:150)

^Iat org.eclipse.ui.internal.Workbench$5.run(Workbench.java:687)

^Iat org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:336)

^Iat org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:604)

^Iat org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:148)

^Iat org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:138)

^Iat org.eclim.eclipse.EclimApplication.start(EclimApplication.java:128)

^Iat org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)

^Iat org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)

^Iat org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)

^Iat org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:388)

^Iat org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:243)

^Iat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

^Iat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

^Iat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

^Iat java.lang.reflect.Method.invoke(Method.java:498)

^Iat org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:673)

^Iat org.eclipse.equinox.launcher.Main.basicRun(Main.java:610)

^Iat org.eclipse.equinox.launcher.Main.run(Main.java:1519)

^Iat org.eclipse.equinox.launcher.Main.main(Main.java:1492)

while executing command (port: 9091): -editor vim -command java_impl -p "TIJ4P" -f "src/java/org/implerror/TestImpl.java" -t "org.implerror.Class1" -s "org.implerror.Interface1" -m '["method1()"]'

"TestImpl.java" 18L, 302C

"TestImpl.java" 18L, 302C written

(0s) system: "/usr/lib/eclipse/plugins/org.eclim_2.6.0/bin/eclim" --nailgun-server localhost --nailgun-port 9091 -editor vim -command java_src_update -p "TIJ4P" -f "src/java/org/implerror/TestImpl.java" -v 

And the eclim log from the shell:

2016-12-04 10:41:17,072 ERROR [org.eclim.command.Main] Command failed

java.lang.NullPointerException

        at org.eclim.plugin.jdt.command.impl.ImplCommand.getSibling(ImplCommand.java:455)

        at org.eclim.plugin.jdt.command.impl.ImplCommand.insertMethods(ImplCommand.java:359)

        at org.eclim.plugin.jdt.command.impl.ImplCommand.execute(ImplCommand.java:105)