Metadata blocks onNeighbourBlockChange()

Hey there, I am looking into using meta-blocks for something I am trying to do with a few different functional blocks, however I am at a loss for how to use metadata blocks:

	
public void onNeighborBlockChange(World world, int posX, int posY, int posZ, Block neighbourBlock){
	 if (world.getBlock(posX, posY + 1, posZ) == Blocks.iron_ore){
		 world.setBlock(posX, posY + 1, posZ, blockRegist.doubled);
	 }

}

Right now, this works how I want it, as doubled:1 is what should come from iron, however when I want it to be the next block along:

	
public void onNeighborBlockChange(World world, int posX, int posY, int posZ, Block neighbourBlock){
	 if (world.getBlock(posX, posY + 1, posZ) == Blocks.gold_ore){
		 world.setBlock(posX, posY + 1, posZ, blockRegist.doubled);
	 }

}

Will still do the first metadata (obviously) but I need it to do doubled:2

How would one go about doing this?