Commands can be parsed, in a very limited way.

src/main/java/net/minecraft/commands/tree/CommandNode.java

@@ -1,6 +1,7 @@
 package net.minecraft.commands.tree;
 
 import com.google.common.collect.Lists;
+import net.minecraft.commands.exceptions.IllegalCommandArgumentException;
 
 import java.util.List;
 
@@ -14,4 +15,6 @@ public abstract class CommandNode {
     public void addChild(CommandNode node) {
         children.add(node);
     }
+
+    public abstract void parse(String command) throws IllegalCommandArgumentException;
 }