[1.8.9] Using reflection to change ItemArmor : NoSuchFieldException on mc server

[Major Squirrel]

Good evening,

 

I'm currently trying to get a field from the ItemArmor class : ItemArmor.maxDamageArray. Using the ReflectionHelper, it works great on Minecraft Client and Minecraft Server configurations.

 

However, I've tested the mod on a friend's server and it doesn't work : NoSuchFieldException. At first, I was using a string to retrieve the field (maxDamageArray), it didn't work. Then I tried to get the value from the declared fields array, it didn't work. I was really surprised to see that it didn't work. Then I took a look at the vanilla server.jar and all the classes (and surely the fields) were obfuscated : I felt really stupid but I learnt something new so it's okay.

 

From now, I suppose I have two ways : either I have to get a deobfuscated version of the server to get it work, or I have to work with the obfuscation which seems to be really complicated.

 

Could you advise me on what should I do now, or what should my friend do to get it work ?

 

By the way, he's using forge-1.8.9-11.15.1.1763-universal.jar

 

Thank you for your time and my apologizes if this is related to a Java issue.

 

EDIT: more info, I use gradlew build to build my mod so that my friend can put in on his server.

[Draco18s]

Because you asked for a field named "maxDamageArray" not "field_77882_bY" which is what it will be in a runtime (not development) environment (at least, in 1.7.10, I can't find the mappings for 1.8.9 as quickly).

[Major Squirrel]

Because you asked for a field named "maxDamageArray" not "field_77882_bY" which is what it will be in a runtime (not development) environment (at least, in 1.7.10, I can't find the mappings for 1.8.9 as quickly).

 

Okay, so do I need to work with obfuscated fields or does he need to get a server deobfuscated version ?

[Choonster]

When you use reflection for vanilla fields/methods, you need to need to check both the SRG (

field_77882_bY

) and MCP (

maxDamageArray

) names to support the release (obfuscated) and development (deobfuscated) environments.

ReflectionHelper

supports this by allowing you to supply multiple names for a field/method.

 

You can find the SRG name of a field/method from the MCP mapping CSVs. If you've set up a ForgeGradle workspace, you can find the mappings used by it in ~/.gradle/caches/minecraft/de/oceanlabs/mcp/<mappings_channel>/<mappings_version> (replace ~ with %USERPROFILE on Windows).

 

You can also download mappings from the MCPBot website or ask MCPBot for individual names on IRC (more details on the website).

[Major Squirrel]

Thank you guys for guiding me to the right direction.