Store commands as nodes and execute them

src/main/java/net/minecraft/commands/CommandDispatcher.java

@@ -4,25 +4,26 @@ import com.google.common.collect.Maps;
 import net.minecraft.commands.builder.CommandBuilder;
 import net.minecraft.commands.exceptions.CommandException;
 import net.minecraft.commands.exceptions.UnknownCommandException;
+import net.minecraft.commands.tree.LiteralCommandNode;
 
 import java.util.Map;
 
 public class CommandDispatcher {
-    private final Map<String, Runnable> commands = Maps.newHashMap();
+    private final Map<String, LiteralCommandNode> commands = Maps.newHashMap();
 
     public void register(CommandBuilder command) {
         if (commands.containsKey(command.getName())) {
             throw new IllegalArgumentException("New command " + command.getName() + " conflicts with existing command " + command.getName());
         }
-        commands.put(command.getName(), command.getExecutor());
+        commands.put(command.getName(), command.build());
     }
 
     public void execute(String command) throws CommandException {
-        Runnable runnable = commands.get(command);
-        if (runnable == null) {
+        LiteralCommandNode node = commands.get(command);
+        if (node == null) {
             throw new UnknownCommandException();
         }
 
-        runnable.run();
+        node.getExecutor().run();
     }
 }