How to stop certain blocks from being exploded?

Ok, so i need to stop certain blocks from being broken when tnt explodes, so far this is my code.

Code:java

 
@EventHandler(priority=EventPriority.HIGHEST)
public void onBlockExplodeEvent(EntityExplodeEvent e){
final ArrayList<Block> restoreblocks = new ArrayList<Block>();
for(Block b : e.blockList()){
if(b.getTypeId() == 15 || b.getTypeId() == 19){
restoreblocks.add(b);
}
}
inst.getServer().getScheduler().scheduleSyncDelayedTask(inst, new Runnable(){public void run(){
for(Block b : restoreblocks){
b.getLocation().getBlock().setType(b.getType());
}
}}, 20);
}
 

Thats my code so far.
noworks.
halp.
lol.

 

event.blockList returns a list of all blocks which would have been broken by the explosion. You can remove the blocks you want to stay from that list.
Pseudocode:
Iterator<Block> iterator = event.blockList.iterator();
while(iterator.hasNext()) {
int typeId = iterator.next().getTypeId();
if (typeId == 15 || typeId == 19) iterator.remove();
}

 

thanks, i thought about doing that.