[1.8][SOLVED]Reflection - Am I doing it right?

gummby8 · April 11, 2016

So this is a first for me, trying to use reflection.

I am trying to set the shader for a client when they right click an item.

Dinking around in minecraft one day I saw that the "Secret Settings..." Button would change the shader to give some interesting visual effects. I wanted to use that without having the randomness.

in the gui the button does this

    public void activateNextShader()
    {
        if (OpenGlHelper.shadersSupported)
        {
            if (this.mc.getRenderViewEntity() instanceof EntityPlayer)
            {
                if (this.theShaderGroup != null)
                {
                    this.theShaderGroup.deleteShaderGroup();
                }

                this.shaderIndex = (this.shaderIndex + 1) % (shaderResourceLocations.length + 1);

                if (this.shaderIndex != shaderCount)
                {
                    this.loadShader(shaderResourceLocations[this.shaderIndex]);
                }
                else
                {
                    this.theShaderGroup = null;
                }
            }
        }
    }

That in turn does

    private void loadShader(ResourceLocation p_175069_1_)
    {
        try
        {
            this.theShaderGroup = new ShaderGroup(this.mc.getTextureManager(), this.resourceManager, this.mc.getFramebuffer(), p_175069_1_);
            this.theShaderGroup.createBindFramebuffers(this.mc.displayWidth, this.mc.displayHeight);
            this.useShader = true;
        }
        catch (IOException ioexception)
        {
            logger.warn("Failed to load shader: " + p_175069_1_, ioexception);
            this.shaderIndex = shaderCount;
            this.useShader = false;
        }
        catch (JsonSyntaxException jsonsyntaxexception)
        {
            logger.warn("Failed to load shader: " + p_175069_1_, jsonsyntaxexception);
            this.shaderIndex = shaderCount;
            this.useShader = false;
        }
    }

loadShader is private so I thought I would try reflection.

The code below works. Just wondering if this is the best way to go about doing this.

    public ItemStack onItemRightClick(ItemStack itemStackIn, World worldIn, EntityPlayer playerIn)
    {
    	
    	
    	if (worldIn.isRemote){
        
    	try {
			load = EntityRenderer.class.getDeclaredMethod("loadShader", ResourceLocation.class);
		} catch (NoSuchMethodException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SecurityException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	
    		load.setAccessible(true);
    	
    		try {
			load.invoke(Minecraft.getMinecraft().entityRenderer, new ResourceLocation("shaders/post/invert.json"));
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

    	}
    	
        return itemStackIn;
        
    }

Ernio · April 11, 2016

As in plain java - yeah, why not.

As in modding - you NEED to use ObfuscationReflectionHelper and its methods.

After releasing a mod standard reflection will not work.

Also:

I am not sure but I think (I heard it somewhere) that secret settings were removed in 1.8.9 or 1.9. Idk really.

BusyBeever · April 11, 2016

Correct me if im wrong but the helper does not have a mapping of the obfuscated names

BusyBeever · April 11, 2016

also you should not find the find field every time the item is rightclicked. do it once and reuse the field u get

Draco18s · April 11, 2016

Couple things:

That references a client-slide-only object, you should move that whole reflection chunk into your Client Proxy and do MainModClass.instance.proxy.doTheThing(), this might even avoid the need for reflection in the first place.

Two, don't reflect the field more than once. Once you have a reference, save it! Then you don't have to do the expensive reflection call ever again.

Three, that doesn't take into account the SRG name that Minecraft's source code will have once your mod is compiled, so even on the client it'll fail to locate the method.

jeffryfisher · April 11, 2016

you NEED to use ObfuscationReflectionHelper and its methods.

After releasing a mod standard reflection will not work.

A couple of my mods use reflection on vanilla classes. They compile and work fine even though I've never heard of ObfuscationReflectionHelper. Did I just get lucky, or might the helper be needed only for certain advanced reflection techniques that won't work without it?

Choonster · April 12, 2016

you NEED to use ObfuscationReflectionHelper and its methods.

After releasing a mod standard reflection will not work.

A couple of my mods use reflection on vanilla classes. They compile and work fine even though I've never heard of ObfuscationReflectionHelper. Did I just get lucky, or might the helper be needed only for certain advanced reflection techniques that won't work without it?

Any time you use reflection to access a vanilla field/method, you need to try both its MCP and SRG names. You can do this manually with Java's standard reflection API or use

ObfuscationReflectionHelper

, which makes things easier by taking multiple names for a field/method and trying each of them.

gummby8 · April 12, 2016

As per the norm I have done something wrong.

    	if (worldIn.isRemote){
    	ObfuscationReflectionHelper.setPrivateValue(EntityRenderer.class, Minecraft.getMinecraft().entityRenderer, new ResourceLocation("shaders/post/invert.json"), "loadShader", "p_175069_1_");
    	}

Problem is this is meant to set a field, how can I get it to use a private method like I was before?

I didn't see any methods in the ObfuscationReflectionHelper that will help me use a private method from vanilla minecraft.

Choonster · April 12, 2016

Instead of using

ObfuscationReflectionHelper

, use

ReflectionHelper

. This has

findField

and

findMethod

methods to get a

Field

or

Method

, respectively.

Use these methods and store the

Field

/

Method

in a static final field. Use this stored reference to get/set the field's value or invoke the method.

gummby8 · April 12, 2016

Welp, it works in Eclipse, but crashes a server or client after compiled

Item

package com.Splosions.ModularBosses.items;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;

import com.Splosions.ModularBosses.client.entity.EntityCartographer;
import com.Splosions.ModularBosses.client.entity.EntityCustomFallingBlock;
import com.Splosions.ModularBosses.client.entity.projectile.EntityChorpSlimeBlob;
import com.Splosions.ModularBosses.client.models.item.ModelLegendsSword;
import com.Splosions.ModularBosses.client.render.items.ModelItemLegendsSword;
import com.Splosions.ModularBosses.util.Schematic;
import com.Splosions.ModularBosses.world.PortalLandingWorldData;
import com.google.gson.JsonSyntaxException;

import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.EntityRenderer;
import net.minecraft.client.renderer.OpenGlHelper;
import net.minecraft.client.shader.ShaderGroup;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.EnumAction;
import net.minecraft.item.ItemStack;
import net.minecraft.item.ItemSword;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.util.ResourceLocation;
import net.minecraft.world.World;
import net.minecraft.world.WorldSavedData;
import net.minecraft.world.storage.MapStorage;
import net.minecraftforge.fml.common.ObfuscationReflectionHelper;
import net.minecraftforge.fml.relauncher.ReflectionHelper;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import java.lang.reflect.*;



public class ItemLegendsSword extends ItemSword {

private static final Method f_loadShader = ReflectionHelper.findMethod(EntityRenderer.class, Minecraft.getMinecraft().entityRenderer, new String[]{"loadShader", "func_148042_a"}, ResourceLocation.class);

public ItemLegendsSword(ToolMaterial material) {
	super(material);
}

    /**
     * Called whenever this item is equipped and the right mouse button is pressed. Args: itemStack, world, entityPlayer
     */
    public ItemStack onItemRightClick(ItemStack itemStackIn, World worldIn, EntityPlayer playerIn)
    {
    	if (worldIn.isRemote){
    	
    		try {
			f_loadShader.invoke(Minecraft.getMinecraft().entityRenderer, new ResourceLocation("shaders/post/sobel.json"));
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    		
    	}


    	
        return itemStackIn;
        
    }

    
}

I got "func_148042_a" from http://export.mcpbot.bspk.rs/ mcp_stable-18-1.8.zip

Crash report

[20:01:56] [server thread/INFO] [FML]: Injecting itemstacks
[20:01:56] [server thread/INFO] [FML]: Itemstack injection complete
[20:01:56] [server thread/ERROR] [FML]: Fatal errors were detected during the transition from PREINITIALIZATION to INITIALIZATION. Loading cannot continue
[20:01:56] [server thread/ERROR] [FML]: 
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCH	mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) 
UCH	FML{8.0.99.99} [Forge Mod Loader] (forge.jar) 
UCH	Forge{11.14.4.1563} [Minecraft Forge] (forge.jar) 
UCH	zeldaswordskills{1.8-3.0.3b} [Zelda Sword Skills] (1.8-zeldaswordskills-3.0.3b.jar) 
UCH	LunatriusCore{1.1.2.30} [LunatriusCore] (LunatriusCore-1.8-1.1.2.30-universal.jar) 
UCE	mb{1.0} [Modular Bosses] (mb-1.0.jar) 
UCH	Schematica{1.7.7.140} [schematica] (Schematica-1.8-1.7.7.140-universal.jar) 
UCH	worldedit{6.1} [WorldEdit] (worldedit-forge-mc1.8-6.1.jar) 
[20:01:56] [server thread/ERROR] [FML]: The following problems were captured during this phase
[20:01:56] [server thread/ERROR] [FML]: Caught exception from mb
java.lang.NoClassDefFoundError: net/minecraft/client/renderer/EntityRenderer
at com.Splosions.ModularBosses.items.ItemLegendsSword.<clinit>(ItemLegendsSword.java:43) ~[itemLegendsSword.class:?]
at com.Splosions.ModularBosses.items.ModularBossesItems.init(ModularBossesItems.java:97) ~[ModularBossesItems.class:?]
at com.Splosions.ModularBosses.ModularBosses.preInit(ModularBosses.java:38) ~[ModularBosses.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:553) ~[forge.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:212) ~[forge.jar:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190) ~[forge.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:119) [LoadController.class:?]
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:550) [Loader.class:?]
at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:88) [FMLServerHandler.class:?]
at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:355) [FMLCommonHandler.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117) [po.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_73]
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.renderer.EntityRenderer
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
... 35 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@46271dd6 from coremod FMLCorePlugin
at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:234) ~[forge.jar:?]
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
... 35 more
Caused by: java.lang.RuntimeException: Attempted to load class cji for invalid side SERVER
at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:49) ~[forge.jar:?]
at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:230) ~[forge.jar:?]
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
... 35 more
[20:01:56] [server thread/ERROR] [net.minecraft.server.MinecraftServer]: Encountered an unexpected exception
net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/renderer/EntityRenderer

at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:163) ~[LoadController.class:?]
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:553) ~[Loader.class:?]
at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:88) ~[FMLServerHandler.class:?]
at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:355) ~[FMLCommonHandler.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:117) ~[po.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:438) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_73]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/renderer/EntityRenderer
at com.Splosions.ModularBosses.items.ItemLegendsSword.<clinit>(ItemLegendsSword.java:43) ~[itemLegendsSword.class:?]
at com.Splosions.ModularBosses.items.ModularBossesItems.init(ModularBossesItems.java:97) ~[ModularBossesItems.class:?]
at com.Splosions.ModularBosses.ModularBosses.preInit(ModularBosses.java:38) ~[ModularBosses.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:553) ~[forge.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:212) ~[LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190) ~[LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:119) ~[LoadController.class:?]
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:550) ~[Loader.class:?]
... 5 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.renderer.EntityRenderer
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at com.Splosions.ModularBosses.items.ItemLegendsSword.<clinit>(ItemLegendsSword.java:43) ~[itemLegendsSword.class:?]
at com.Splosions.ModularBosses.items.ModularBossesItems.init(ModularBossesItems.java:97) ~[ModularBossesItems.class:?]
at com.Splosions.ModularBosses.ModularBosses.preInit(ModularBosses.java:38) ~[ModularBosses.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:553) ~[forge.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:212) ~[LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190) ~[LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:119) ~[LoadController.class:?]
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:550) ~[Loader.class:?]
... 5 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer net.minecraftforge.fml.common.asm.transformers.SideTransformer@46271dd6 from coremod FMLCorePlugin
at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:234) ~[forge.jar:?]
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at com.Splosions.ModularBosses.items.ItemLegendsSword.<clinit>(ItemLegendsSword.java:43) ~[itemLegendsSword.class:?]
at com.Splosions.ModularBosses.items.ModularBossesItems.init(ModularBossesItems.java:97) ~[ModularBossesItems.class:?]
at com.Splosions.ModularBosses.ModularBosses.preInit(ModularBosses.java:38) ~[ModularBosses.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:553) ~[forge.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:212) ~[LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190) ~[LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:119) ~[LoadController.class:?]
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:550) ~[Loader.class:?]
... 5 more
Caused by: java.lang.RuntimeException: Attempted to load class cji for invalid side SERVER
at net.minecraftforge.fml.common.asm.transformers.SideTransformer.transform(SideTransformer.java:49) ~[forge.jar:?]
at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:230) ~[forge.jar:?]
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279) ~[launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176) ~[launchwrapper-1.12.jar:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_73]
at com.Splosions.ModularBosses.items.ItemLegendsSword.<clinit>(ItemLegendsSword.java:43) ~[itemLegendsSword.class:?]
at com.Splosions.ModularBosses.items.ModularBossesItems.init(ModularBossesItems.java:97) ~[ModularBossesItems.class:?]
at com.Splosions.ModularBosses.ModularBosses.preInit(ModularBosses.java:38) ~[ModularBosses.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:553) ~[forge.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:212) ~[LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190) ~[LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_73]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_73]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_73]
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304) ~[minecraft_server.1.8.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:275) ~[minecraft_server.1.8.jar:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:119) ~[LoadController.class:?]
at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:550) ~[Loader.class:?]
... 5 more
[20:01:56] [server thread/ERROR] [net.minecraft.server.MinecraftServer]: This crash report has been saved to: C:\Users\Derp\Desktop\Forge 1.8 Test Server\.\crash-reports\crash-2016-04-11_20.01.56-server.txt

EDIT: Just saw how many imports my test item has, I use it to test a lot of things, I should clean those up.

coolAlias · April 12, 2016

That's because you're trying to use a client-side only class on the server, where it does not exist. You need to run that code through your proxy system.

Draco18s · April 12, 2016

You didn't put a catch for ClassNotFoundException, because Eclipse didn't tell you you needed it because it can see the class just fine.

That references a client-slide-only object, you should move that whole reflection chunk into your Client Proxy and do MainModClass.instance.proxy.doTheThing(), this might even avoid the need for reflection in the first place.

gummby8 · April 12, 2016

K I put everything in my ClientProxy class

Server loads up fine now, but the minecraft client still crashes.

I tried putting in a catch for ClassNotFoundException or NoSuchMethodException but eclipse won't let me saying, "Unreachable catch block for NoSuchMethodException. This exception is never thrown from the try statement body"

The crash reporst shows there is a problem on line 41 of my ClientProxy which is

private static final Method f_loadShader = ReflectionHelper.findMethod(EntityRenderer.class, Minecraft.getMinecraft().entityRenderer, new String[]{"loadShader", "func_148042_a"}, ResourceLocation.class);

So what am I doing wrong here?

private static final Method f_loadShader = ReflectionHelper.findMethod(EntityRenderer.class, Minecraft.getMinecraft().entityRenderer, new String[]{"loadShader", "func_148042_a"}, ResourceLocation.class);

public static void sobelShader(){
	try {
		f_loadShader.invoke(Minecraft.getMinecraft().entityRenderer, new ResourceLocation("shaders/post/sobel.json"));
	} catch (IllegalAccessException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (IllegalArgumentException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (InvocationTargetException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	} catch (UnableToFindMethodException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}

}

---- Minecraft Crash Report ----

WARNING: coremods are present:
  NowWithRendering (redstonepaste-mc1.8-1.7.1.jar)
Contact their authors BEFORE contacting forge

// There are four lights!

Time: 4/12/16 7:26 AM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderException: java.lang.ExceptionInInitializerError
at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:163)
at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:538)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:214)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:413)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:325)
at net.minecraft.client.main.Main.main(SourceFile:120)
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:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ExceptionInInitializerError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:344)
at net.minecraftforge.fml.common.ProxyInjector.inject(ProxyInjector.java:60)
at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:517)
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:483)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:212)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:190)
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:483)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:507)
... 10 more
Caused by: net.minecraftforge.fml.relauncher.ReflectionHelper$UnableToFindMethodException: java.lang.NoSuchMethodException: net.minecraft.client.renderer.EntityRenderer.func_148042_a(net.minecraft.util.ResourceLocation)
at net.minecraftforge.fml.relauncher.ReflectionHelper.findMethod(ReflectionHelper.java:183)
at com.Splosions.ModularBosses.proxy.ClientProxy.<clinit>(ClientProxy.java:41)
... 36 more
Caused by: java.lang.NoSuchMethodException: net.minecraft.client.renderer.EntityRenderer.func_148042_a(net.minecraft.util.ResourceLocation)
at java.lang.Class.getDeclaredMethod(Class.java:2122)
at net.minecraftforge.fml.relauncher.ReflectionHelper.findMethod(ReflectionHelper.java:174)
... 37 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 137731168 bytes (131 MB) / 286924800 bytes (273 MB) up to 1060372480 bytes (1011 MB)
Mod Pack: LiteLoader startup failed
LiteLoader Mods: LiteLoader startup failed
LaunchWrapper: 21 active transformer(s)
          - Transformer: net.minecraftforge.fml.common.asm.transformers.PatchingTransformer
          - Transformer: $wrapper.net.minecraftforge.fml.common.asm.transformers.BlamingTransformer
          - Transformer: $wrapper.net.minecraftforge.fml.common.asm.transformers.SideTransformer
          - Transformer: $wrapper.net.minecraftforge.fml.common.asm.transformers.EventSubscriptionTransformer
          - Transformer: $wrapper.net.minecraftforge.fml.common.asm.transformers.EventSubscriberTransformer
          - Transformer: $wrapper.net.minecraftforge.classloading.FluidIdTransformer
          - Transformer: $wrapper.net.fybertech.nwr.NowWithRendering
          - Transformer: com.mumfrey.liteloader.transformers.event.EventProxyTransformer
          - Transformer: com.mumfrey.liteloader.launch.LiteLoaderTransformer
          - Transformer: com.mumfrey.liteloader.client.transformers.CrashReportTransformer
          - Transformer: net.minecraftforge.fml.common.asm.transformers.DeobfuscationTransformer
          - Transformer: net.minecraftforge.fml.common.asm.transformers.AccessTransformer
          - Transformer: net.minecraftforge.fml.common.asm.transformers.ModAccessTransformer
          - Transformer: net.minecraftforge.fml.common.asm.transformers.ItemStackTransformer
          - Transformer: net.minecraftforge.fml.common.asm.transformers.TerminalTransformer
          - Transformer: com.mumfrey.liteloader.transformers.event.EventTransformer
          - Transformer: com.mumfrey.liteloader.common.transformers.LiteLoaderPacketTransformer
          - Transformer: com.mumfrey.liteloader.client.transformers.LiteLoaderEventInjectionTransformer
          - Transformer: com.mumfrey.liteloader.client.transformers.MinecraftTransformer
          - Transformer: com.mumfrey.liteloader.transformers.event.json.ModEventInjectionTransformer
          - Transformer: net.minecraftforge.fml.common.asm.transformers.ModAPITransformer
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.3.1521 11 mods loaded, 11 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UC	mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) 
UC	FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.3.1521.jar) 
UC	Forge{11.14.3.1521} [Minecraft Forge] (forge-1.8-11.14.3.1521.jar) 
UC	zeldaswordskills{1.8-3.0.3b} [Zelda Sword Skills] (1.8-zeldaswordskills-3.0.3b.jar) 
UC	iChunUtil{5.5.0} [iChunUtil] (iChunUtil-5.5.0.jar) 
UC	LunatriusCore{1.1.2.30} [LunatriusCore] (LunatriusCore-1.8-1.1.2.30-universal.jar) 
UE	mb{1.0} [Modular Bosses] (mb-1.0.jar) 
UC	redstonepaste{1.7.1} [Redstone Paste] (redstonepaste-mc1.8-1.7.1.jar) 
UC	Schematica{1.7.7.140} [schematica] (Schematica-1.8-1.7.7.140-universal.jar) 
UC	Tabula{5.1.0} [Tabula] (Tabula-5.1.0.jar) 
UC	worldedit{6.1} [WorldEdit] (worldedit-forge-mc1.8-6.1.jar) 
Loaded coremods (and transformers): 
NowWithRendering (redstonepaste-mc1.8-1.7.1.jar)
  net.fybertech.nwr.NowWithRendering
GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.5.0 NVIDIA 361.75' Renderer: 'GeForce GTX 960/PCIe/SSE2'

Draco18s · April 12, 2016

Don't reflect the method in the static variable declaration point, declare the variable and wait until one of the Init phases to define it.

Choonster · April 12, 2016

You have the wrong SRG name for the method.

EntityRenderer#loadShader

is

func_175069_a

,

func_148042_a

is

Shader#loadShader

.

The instance argument of

ReflectionHelper#findMethod

is never used, I suggest passing

null

to it (since

Minecraft#entityRenderer

will be

null

anyway when your class is loaded).

gummby8 · April 12, 2016

You have the wrong SRG name for the method.
EntityRenderer#loadShader
is
func_175069_a
,
func_148042_a
is
Shader#loadShader
.

*facepalm*

The instance argument of
ReflectionHelper#findMethod
is never used, I suggest passing
null
to it (since
Minecraft#entityRenderer
will be
null
anyway when your class is loaded).

*done*

Don't reflect the method in the static variable declaration point, declare the variable and wait until one of the Init phases to define it.

*done*

I put the reflection in my registerRenderes method. seems to be working.

Now it works. Thanks guys

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[1.8][SOLVED]Reflection - Am I doing it right?

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