Hey there! So I was trying to make my first ever capability, but it gives a null pointer exception every time I try to get the capability of a player ANYWHERE in the mod at ANY time. I even tried to copy the capabilities from another mod byte for byte with no luck.

 

Calling "WizardryCapabilityProvider.get(playerIn);" always returns null anywhere and I try to call it, and yes, I DO register it and attach the capability in the attachCapability event.

 

First off: This is my capability package in my project.

https://github.com/TeamWizardry/Wizardry/tree/master/src/main/java/com/teamwizardry/wizardry/api/capability

(Ignore the bloods package)

 

Second: My registration and attachment of the capabilities to players:

https://github.com/TeamWizardry/Wizardry/blob/master/src/main/java/com/teamwizardry/wizardry/init/ModCapabilities.java

I want to make something clear here, the if statement

`if (!e.getEntity().hasCapability(WizardryCapabilityProvider.wizardryCapability, null)) {`

is passing successfully here.

 

Third: My commonProxy registeration:

https://github.com/TeamWizardry/Wizardry/blob/master/src/main/java/com/teamwizardry/wizardry/common/proxy/CommonProxy.java#L22

 

Fourth: Registration of the eventHandler that attaches the capabilities from the second point:

https://github.com/TeamWizardry/Wizardry/blob/master/src/main/java/com/teamwizardry/wizardry/Wizardry.java#L106

 

And finally, fifth: The packet handler for the message. It is registered in commonProxy in the third point: https://github.com/TeamWizardry/Wizardry/tree/master/src/main/java/com/teamwizardry/wizardry/common/network

 

I've had 5 of my (dev) friends check thoroughly over my code, all of them, including myself, failed to find an error as to why the capabilities always return null anywhere and everywhere. It's a simple null pointer.

 

If anyone can find any error in the code, please tell me.

I assume there was a log or crash?

If you read the post, I get a null pointer every single time i do CapabilityProvider.get(player)

I mean't you should post it, guess I wasn't clear enough sorry.

It really is redundant to post. It's a null pointer on that get method anywhere and everywhere I call it. Nothing else about it. It's IWizardryCapability being returned null from that get method.

Alright, try putting if (hasCapability(...)) before you call getCapability(...)

Alright, try putting if (hasCapability(...)) before you call getCapability(...)

Read the code, we do that. https://github.com/TeamWizardry/Wizardry/blob/master/src/main/java/com/teamwizardry/wizardry/api/capability/WizardryCapabilityProvider.java#L31

Here's a fun redundant log for anyone who wants it:

 

http://pastebin.com/1mq5KEXZ

 

This was after removing "if (data == null) return;" (which just stopped the entire event there)

 

That's one example usage of getting the cap. I've used it in a lot more places and it's just the same result.

Does it error here as well? https://github.com/TeamWizardry/Wizardry/blob/master/src/main/java/com/teamwizardry/wizardry/common/core/EventHandler.java#L79

Also do you ever send the "syncing" packet?

Yes it does. but I temporarily prevented that with a null check.

I'm fairly certain I'm sending the packets.

Why would your capability be on the players?

Because I need that same capability for blocks (haven't coded that part yet)

 

And players can hold capabilities, so it's a perfect solution/usage.

Because I need that same capability for blocks (haven't coded that part yet)

 

And players can hold capabilities, so it's a perfect solution/usage.

 

I think Lex meant "Why would your capability already be on the player in

AttachCapabilityEvent.Entity

?"

Somewhat, my point is if you're getting a null from the player then you need to check if the player is getting you cap set.

Its your mod you have to debug it.

It should be simple enough, use your IDEs breakpoints.

Also ALLLLLWAAAAYYYYYSSS post logs.

http://i.imgur.com/3ZiYUcY.png

Breakpointed. Why is the player entity null?!

 

the capability: http://i.imgur.com/9Qo16az.png

That's correct, but the entityPlayer does NOT look promising... Why is it null?!

http://i.imgur.com/cpNHNig.png

... its not null... something it is useing in its toString is null. Which would make sense based on where this event is fired...

So what should I do? I assumed that was the perfect event to attach a capability, but if I cant even get the entity, what am I supposed to do?

it is, you've attached it, atleast thats what it looks like.

Show us THE ACTUAL FREAKING ERROR

 

I did paste the error, it's a above...

http://pastebin.com/1mq5KEXZ

That's the null pointer I get from getCapability(player).

There is nothing that can be null on line 58

My apologize, Intellij must've reformatted and removed redundant imports. I just pushed a new commit, and here's the new log:

http://pastebin.com/YuifF4q8

 

It is. CommonProxy -> preInit() { }

 

http://i.imgur.com/I5y3cSb.png

Ya dude, a quick step into your get function would show you that wizardryCapability was null.

Which means your cap is never registered.

This is basic debugging dude...

Should I call the same line:

CapabilityManager.INSTANCE.register(IWizardryCapability.class, new WizardryCapabilityStorage(), DefaultWizardryCapability.class);

In the clientProxy's preInit as well?

or in the main class's preInit or what?

 

I just tried registering the cap in clientproxy and that crashed, then tried the main class's preinit and that crashed as well. I'm assuming I shouldn't be registering it like that. What must I do?

I'll do that later. What should I do to fix the registration of the caps right now?