In my code i have to access some private field. I know how to do this using reflection.

 

try
{
	Field lastDamage = EntityLiving.class.getDeclaredField("lastDamage");
	lastDamage.setAccessible(true);
	int fieldValue = (Integer) lastDamage.get(movingobjectposition.entityHit);
	damage+=fieldValue;
}
catch
(Exception e)
{
	e.printStackTrace();
}

However, this works only in Eclipse, after reobfuscation lastDamage gets some funky name field_70707_bp, so unless i change the string before reobfuscating my mod, the code above won't work in released version of my mod.

Whereas I know where to find non reobfuscated name, It's a pain in the ass to keep an eye on it before reobfuscating. I read that newest version of FML allows for runtime reobfuscation, which is supposed to help it such cases.

 

Does anyone know how to use that feature?

In my code i have to access some private field. I know how to do this using reflection.

 

try
{
	Field lastDamage = EntityLiving.class.getDeclaredField("lastDamage");
	lastDamage.setAccessible(true);
	int fieldValue = (Integer) lastDamage.get(movingobjectposition.entityHit);
	damage+=fieldValue;
}
catch
(Exception e)
{
	e.printStackTrace();
}

However, this works only in Eclipse, after reobfuscation lastDamage gets some funky name field_70707_bp, so unless i change the string before reobfuscating my mod, the code above won't work in released version of my mod.

Whereas I know where to find non reobfuscated name, It's a pain in the ass to keep an eye on it before reobfuscating. I read that newest version of FML allows for runtime reobfuscation, which is supposed to help it such cases.

 

Does anyone know how to use that feature?

 

This funky name "field_xxxx" is actually the runtime deobfuscated name. It a so called "SRG name". What you want to use would be CSV names, but since they're community-driven, they aren't used there.

The solution would be the ObfuscationReflectionHelper class. I use it like this:

ObfuscationReflectionHelper.setPrivateValue(EntityLiving.class, entity, 0, "recentlyHit", "field_70718_bc");

So the parameters would be:

- class to access

- instance

- value

- the CSV name (the name used in the MCP workspace)

- SRG name (the name during the runtime-deobf)

Thanks! This does the trick.