Remove blocked commands from the CommandMap. Resolves #622

Temporarily workaround: Remove blocked command from the CommandMap
In Spigot 1.8.3, cancelling PlayerCommandPreprocessEvent will have no effect
This results in TFM failing to block player commands: The player will get a message,
but the command will still execute. Removing the command from the CommandMap is a
temporary workaround untill the related Spigot issue has been fixed.

https://hub.spigotmc.org/jira/browse/SPIGOT-879

buildnumber.properties

@@ -1,3 +1,3 @@
 #Build Number for ANT. Do not edit!
-#Tue May 12 16:41:20 CEST 2015
+#Tue May 12 16:51:12 CEST 2015
-build.number=1011
+build.number=1014

nbproject/project.properties

@@ -57,8 +57,8 @@ javac.compilerargs=-Xlint:unchecked -Xlint:deprecation
 javac.deprecation=false
 javac.processorpath=\
     ${javac.classpath}
-javac.source=1.7
+javac.source=1.6
-javac.target=1.7
+javac.target=1.6
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}

src/config.yml

@@ -125,7 +125,6 @@ blocked_commands:
   - 's:b:/reload:_'
 
   # Superadmin commands - Auto-eject
-  - 's:a:/stop:_'
   - 's:a:/save-all:_'
   - 's:a:/save-on:_'
   - 's:a:/save-off:_'

src/me/StevenLawson/TotalFreedomMod/TFM_CommandBlocker.java

@@ -1,8 +1,11 @@
 package me.StevenLawson.TotalFreedomMod;
 
+import java.lang.reflect.Field;
 import java.util.HashMap;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 import me.StevenLawson.TotalFreedomMod.Commands.TFM_CommandLoader;
 import me.StevenLawson.TotalFreedomMod.Config.TFM_ConfigEntry;
 import org.apache.commons.lang3.StringUtils;
@@ -10,6 +13,7 @@ import org.bukkit.ChatColor;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandMap;
 import org.bukkit.command.CommandSender;
+import org.bukkit.command.SimpleCommandMap;
 import org.bukkit.entity.Player;
 
 public class TFM_CommandBlocker
@@ -90,6 +94,35 @@ public class TFM_CommandBlocker
 
             if (command != null)
             {
+                // Temporarily workaround: Remove blocked command from the CommandMap
+                // In Spigot 1.8.3, cancelling PlayerCommandPreprocessEvent will have no effect
+                // This results in TFM failing to block player commands: The player will get a message,
+                // but the command will still execute. Removing the command from the CommandMap is a
+                // temporary workaround untill the related Spigot issue has been fixed.
+                // https://hub.spigotmc.org/jira/browse/SPIGOT-879
+                try
+                {
+                    Field field = SimpleCommandMap.class.getDeclaredField("knownCommands");
+                    field.setAccessible(true);
+                    Map<?, ?> knownCommands = (Map) field.get(commandMap);
+
+                    Iterator<?> it = knownCommands.entrySet().iterator();
+                    while (it.hasNext())
+                    {
+                        final Object e = it.next();
+                        if (command.equals(((Entry) e).getValue()))
+                        {
+                            it.remove();
+                        }
+                    }
+                }
+                catch (Exception ex)
+                {
+                    TFM_Log.severe("Could not nullify command: " + command.getName());
+                    TFM_Log.severe(ex);
+                }
+                // End Temporary workaround
+
                 for (String alias : command.getAliases())
                 {
                     BLOCKED_COMMANDS.put(alias.toLowerCase(), blockedCommandEntry);
@@ -120,7 +153,8 @@ public class TFM_CommandBlocker
             return true;
         }
 
-        if (command.startsWith("/")) {
+        if (command.startsWith("/"))
+        {
             command = command.substring(1);
         }