added getGroups() to return a full list of all group-names

src/net/milkbowl/vault/permission/Permission.java

@@ -1019,4 +1019,10 @@ public abstract class Permission {
     public void setGroupSuffix(World world, String group, String suffix) {
         setGroupSuffix(world.getName(), group, suffix);
     }
+    
+    /**
+     * Returns a list of all known groups
+     * @return an Array of String of all groups
+     */
+    abstract public String[] getGroups();
 }

src/net/milkbowl/vault/permission/plugins/Permission_GroupManager.java

@@ -1,11 +1,17 @@
 package net.milkbowl.vault.permission.plugins;
 
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Set;
 import java.util.logging.Logger;
 
 import net.milkbowl.vault.permission.Permission;
 
 import org.anjocaido.groupmanager.GroupManager;
+import org.anjocaido.groupmanager.data.Group;
 import org.anjocaido.groupmanager.permissions.AnjoPermissionsHandler;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Event.Priority;
 import org.bukkit.event.Event.Type;
@@ -321,4 +327,16 @@ public class Permission_GroupManager extends Permission {
 		}
 		return false;
 	}
+
+	@Override
+	public String[] getGroups() {
+		Set<String> groupNames = new HashSet<String>();
+		for (World world : Bukkit.getServer().getWorlds()) {
+			Collection<Group> groups = groupManager.getWorldsHolder().getWorldData(world.getName()).getGroupList();
+			for (Group group : groups) {
+				groupNames.add(group.getName());
+			}
+		}
+		return groupNames.toArray(new String[0]);
+	}
 }

src/net/milkbowl/vault/permission/plugins/Permission_Permissions2.java

@@ -1,7 +1,11 @@
 package net.milkbowl.vault.permission.plugins;
 
+import java.util.HashSet;
+import java.util.Set;
 import java.util.logging.Logger;
 
+import org.bukkit.Bukkit;
+import org.bukkit.World;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Event.Priority;
 import org.bukkit.event.Event.Type;
@@ -13,6 +17,7 @@ import org.bukkit.permissions.PermissionAttachmentInfo;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.PluginManager;
 
+import com.nijiko.permissions.Group;
 import com.nijiko.permissions.PermissionHandler;
 import com.nijikokun.bukkit.Permissions.Permissions;
 
@@ -328,4 +333,15 @@ public class Permission_Permissions2 extends Permission {
 		return false;
 	}
 
+	@Override
+	public String[] getGroups() {
+		Set<String> groupNames = new HashSet<String>();
+		for (World world : Bukkit.getServer().getWorlds()) {
+			for (Group group : perms.getGroups(world.getName())) {
+				groupNames.add(group.getName());
+			}
+		}
+		return groupNames.toArray(new String[0]);
+	}
+
 }

src/net/milkbowl/vault/permission/plugins/Permission_Permissions3.java

@@ -19,10 +19,14 @@
 
 package net.milkbowl.vault.permission.plugins;
 
+import java.util.HashSet;
+import java.util.Set;
 import java.util.logging.Logger;
 
 import net.milkbowl.vault.permission.Permission;
 
+import org.bukkit.Bukkit;
+import org.bukkit.World;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Event.Priority;
 import org.bukkit.event.Event.Type;
@@ -339,4 +343,15 @@ public class Permission_Permissions3 extends Permission {
 			return false;
 		}
 	}
+
+	@Override
+	public String[] getGroups() {
+		Set<String> groupNames = new HashSet<String>();
+		for (World world : Bukkit.getServer().getWorlds()) {
+			for (Group group : perms.getGroups(world.getName())) {
+				groupNames.add(group.getName());
+			}
+		}
+		return groupNames.toArray(new String[0]);
+	}
 }

src/net/milkbowl/vault/permission/plugins/Permission_PermissionsBukkit.java

@@ -403,4 +403,14 @@ public class Permission_PermissionsBukkit extends Permission {
 	public void setGroupSuffix(String world, String group, String suffix) {
 		throw new UnsupportedOperationException(getName() + " does not support group info nodes.");
 	}
+
+	@Override
+	public String[] getGroups() {
+		List<String> groupNames = new ArrayList<String>();
+		for (Group group : perms.getAllGroups()) {
+			groupNames.add(group.getName());
+		}
+		
+		return groupNames.toArray(new String[0]);
+	}
 }

src/net/milkbowl/vault/permission/plugins/Permission_PermissionsEx.java

@@ -82,7 +82,7 @@ public class Permission_PermissionsEx extends Permission {
 
     @Override
     public boolean playerHas(Player player, String permission) {
-        return this.permission.has(player, permission);
+        return PermissionsEx.has(player, permission);
     }
 
     @Override
@@ -466,4 +466,16 @@ public class Permission_PermissionsEx extends Permission {
 			return false;
 		}
 	}
+
+	@Override
+	public String[] getGroups() {
+		PermissionGroup[] groups = PermissionsEx.getPermissionManager().getGroups();
+		if (groups == null || groups.length == 0)
+			return null;
+		String[] groupNames = new String[groups.length];
+		for (int i = 0; i < groups.length; i++) {
+			groupNames[i] = groups[i].getName();
+		}
+		return groupNames;
+	}
 }

src/net/milkbowl/vault/permission/plugins/Permission_SuperPerms.java

@@ -242,4 +242,9 @@ public class Permission_SuperPerms extends Permission {
 	public void setGroupSuffix(String world, String group, String suffix) {
 		throw new UnsupportedOperationException(getName() + " no data permissions.");
 	}
+
+	@Override
+	public String[] getGroups() {
+		throw new UnsupportedOperationException(getName() + " does not support group listing!");
+	}
 }