ArgReaders use exceptions - Part 2

src/com/massivecraft/massivecore/cmd/HelpCommand.java

@@ -12,13 +12,18 @@ public class HelpCommand extends MassiveCommand
 	// INSTANCE & CONSTRUCT
 	// -------------------------------------------- //
 	
-	private static HelpCommand i = new HelpCommand();
+	protected static HelpCommand i = new HelpCommand();
 	public static HelpCommand get() { return i; }
 	private HelpCommand()
 	{
+		// Aliases
 		this.addAliases("?", "h", "help");
+		
+		// Args
+		this.addOptionalArg("page", "1");
+		
+		// Other
 		this.setDesc("");
-		this.addOptionalArg("page","1");
 	}
 	
 	// -------------------------------------------- //
@@ -26,13 +31,17 @@ public class HelpCommand extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{	
+		// Args
+		Integer pagenumber = this.arg(0, ARInteger.get(), 1);
+		
+		// Get parent command
 		if (this.getCommandChain().size() == 0) return;
 		MassiveCommand parentCommand = this.getCommandChain().get(this.getCommandChain().size()-1);
 		
+		// Create Lines
 		ArrayList<String> lines = new ArrayList<String>();
-		
 		for (String helpline : parentCommand.getHelp())
 		{
 			lines.add(Txt.parse("<a>#<i> "+helpline));
@@ -46,8 +55,7 @@ public class HelpCommand extends MassiveCommand
 			}
 		}
 		
-		Integer pagenumber = this.arg(0, ARInteger.get(), 1);
+		// Send Lines
-		if (pagenumber == null) return;
 		sendMessage(Txt.getPage(lines, pagenumber, "Help for command \""+parentCommand.getAliases().get(0)+"\"", sender));
 	}
 	

src/com/massivecraft/massivecore/cmd/MassiveCommand.java

@@ -339,14 +339,15 @@ public class MassiveCommand
 			}
 			this.fixSenderVars();
 			
-			if ( ! isValidCall(this.sender, this.getArgs())) return;
+			if (isValidCall(this.sender, this.getArgs()))
-			perform();
+			{
+				perform();
+			}
 		}
 		catch (MassiveCommandException ex)
 		{
-			// Sometimes arg readers (or commands themself)
+			// Sometimes ArgReaders (or commands themself) throw exceptions, to stop executing and notify the user.
-			// throw exceptions, to stop executing and notify the user.
+			Mixin.messageOne(sender, ex.getMessages());
-			Mixin.msgOne(sender, ex.getErrorMsgs());
 		}
 		finally
 		{

src/com/massivecraft/massivecore/cmd/MassiveCommandException.java

@@ -1,10 +1,13 @@
 package com.massivecraft.massivecore.cmd;
 
-import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
 
-public class MassiveCommandException extends RuntimeException
+import com.massivecraft.massivecore.collections.MassiveList;
+import com.massivecraft.massivecore.util.Txt;
+
+public class MassiveCommandException extends Exception
 {
 	// -------------------------------------------- //
 	// CONSTANTS
@@ -12,19 +15,10 @@ public class MassiveCommandException extends RuntimeException
 	
 	private static final long serialVersionUID = 1L;
 	
-	// -------------------------------------------- //
-	// FIELDS
-	// -------------------------------------------- //
-	
-	private List<String> errorMsgs  = new ArrayList<String>();
-	public List<String> getErrorMsgs() { return this.errorMsgs; }
-	public void setErrorMsgs(List<String> msgs) { this.errorMsgs = msgs; }
-	public void addErrorMsg(String msg) { this.errorMsgs.add(msg); }
-	
 	// -------------------------------------------- //
 	// CONSTRUCTORS
 	// -------------------------------------------- //
-	
+	/*
 	public MassiveCommandException()
 	{
 		
@@ -32,12 +26,44 @@ public class MassiveCommandException extends RuntimeException
 	
 	public MassiveCommandException(String msg)
 	{
-		this.errorMsgs.add(msg);
+		this.messages.add(msg);
 	}
 	
 	public MassiveCommandException(Collection<String> msgs)
 	{
-		this.errorMsgs.addAll(msgs);
+		this.messages.addAll(msgs);
+	}
+	*/
+	
+	// -------------------------------------------- //
+	// MESSAGES
+	// -------------------------------------------- //
+	
+	private List<String> messages = new MassiveList<String>();
+	public List<String> getMessages() { return this.messages; }
+	
+	@Override
+	public String getMessage()
+	{
+		return Txt.implode(this.getMessages(), "\n");
 	}
 	
+	public MassiveCommandException setMessage(String message) { this.messages = new MassiveList<String>(message); return this; }
+	public MassiveCommandException setMsg(String msg) { return this.setMessage(Txt.parse(msg)); }
+	public MassiveCommandException setMsg(String msg, Object... args) { return this.setMessage(Txt.parse(msg, args)); }
+	
+	public MassiveCommandException addMessage(String message) { this.getMessages().add(message); return this; }
+	public MassiveCommandException addMsg(String msg) { return this.addMessage(Txt.parse(msg)); }
+	public MassiveCommandException addMsg(String msg, Object... args) { return this.addMessage(Txt.parse(msg, args)); }
+	
+	public MassiveCommandException setMessages(Collection<String> messages) { this.messages = new MassiveList<String>(messages); return this; }
+	public MassiveCommandException setMessages(String... messages) { return this.setMessages(Arrays.asList(messages)); }
+	public MassiveCommandException setMsgs(Collection<String> msgs) { return this.setMessages(Txt.parse(msgs)); }
+	public MassiveCommandException setMsgs(String... msgs) { return this.setMsgs(Arrays.asList(msgs)); }
+	
+	public MassiveCommandException addMessages(Collection<String> messages) { this.getMessages().addAll(messages); return this; }
+	public MassiveCommandException addMessages(String... messages) { return this.addMessages(Arrays.asList(messages)); }
+	public MassiveCommandException addMsgs(Collection<String> messages) { this.getMessages().addAll(messages); return this; }
+	public MassiveCommandException addMsgs(String... msgs) { return this.addMsgs(Arrays.asList(msgs)); }
+	
 }

src/com/massivecraft/massivecore/cmd/arg/ARAbstractPrimitive.java

@@ -18,7 +18,7 @@ public abstract class ARAbstractPrimitive<T> extends ArgReaderAbstract<T>
 	// -------------------------------------------- //
 	
 	@Override
-	public T read(String arg, CommandSender sender)
+	public T read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		T result;
 		
@@ -28,7 +28,7 @@ public abstract class ARAbstractPrimitive<T> extends ArgReaderAbstract<T>
 		}
 		catch (Exception e)
 		{
-			throw new MassiveCommandException("<b>Invalid " + this.typename() + " \"<h>" + arg + "\"<b>.");
+			throw new MassiveCommandException().addMsg("<b>Invalid %s \"<h>%s\"<b>.", this.typename(), arg);
 		}
 		
 		return result;

src/com/massivecraft/massivecore/cmd/arg/ARAbstractSelect.java

@@ -23,28 +23,32 @@ public abstract class ARAbstractSelect<T> extends ArgReaderAbstract<T>
 	// -------------------------------------------- //
 	
 	@Override
-	public T read(String arg, CommandSender sender)
+	public T read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		T result = this.select(arg, sender);
 		
 		if (result == null)
 		{
-			MassiveCommandException errors = new MassiveCommandException();
+			MassiveCommandException exception = new MassiveCommandException();
-			errors.addErrorMsg("<b>No " + this.typename() + " matches \"<h>"+arg+"<b>\".");
+			exception.addMsg("<b>No %s matches \"<h>%s<b>\".", this.typename(), arg);
 			if (this.canList(sender))
 			{
 				Collection<String> names = this.altNames(sender);
 				if (names.size() == 0)
 				{
-					errors.addErrorMsg("<i>Note: There is no "+this.typename()+" available.");
+					exception.addMsg("<i>Note: There is no %s available.", this.typename());
 				}
 				else
 				{
-					errors.addErrorMsg("<i>Use "+Txt.implodeCommaAndDot(names, "<h>%s", "<i>, ", " <i>or ", "<i>."));
+					String format = Txt.parse("<h>%s");
+					String comma = Txt.parse("<i>, ");
+					String and = Txt.parse(" <i>or ");
+					String dot = Txt.parse("<i>.");
+					exception.addMsg("<i>Use %s", Txt.implodeCommaAndDot(names, format, comma, and, dot));
 				}
 			}
 			
-			throw errors;
+			throw exception;
 		}
 		
 		return result;

src/com/massivecraft/massivecore/cmd/arg/ARList.java

@@ -5,6 +5,8 @@ import java.util.List;
 
 import org.bukkit.command.CommandSender;
 
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
+
 public class ARList<T> extends ArgReaderAbstract<List<T>>
 {
 	// -------------------------------------------- //
@@ -34,7 +36,7 @@ public class ARList<T> extends ArgReaderAbstract<List<T>>
 	
 	// NOTE: Must be used with argConcatFrom and setErrorOnTooManyArgs(false).
 	@Override
-	public List<T> read(String arg, CommandSender sender)
+	public List<T> read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		// Split into inner args
 		String[] innerArgs = arg.split("\\s+");

src/com/massivecraft/massivecore/cmd/arg/ARMaterial.java

@@ -19,15 +19,15 @@ public class ARMaterial extends ArgReaderAbstract<Material>
 	// -------------------------------------------- //
 	
 	@Override
-	public Material read(String arg, CommandSender sender)
+	public Material read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		Material ret = Material.matchMaterial(arg);
 		if (ret == null)
 		{
-			MassiveCommandException errors = new MassiveCommandException();
+			MassiveCommandException exception = new MassiveCommandException();
-			errors.addErrorMsg("<b>No material matches <h>"+arg+"<b>.");
+			exception.addMsg("<b>No material matches <h>%s<b>.", arg);
-			errors.addErrorMsg("<i>Suggestion: <aqua>http://www.minecraftwiki.net/wiki/Data_values");
+			exception.addMsg("<i>Suggestion: <aqua>http://www.minecraftwiki.net/wiki/Data_values");
-			throw errors;
+			throw exception;
 		}
 		
 		return ret;

src/com/massivecraft/massivecore/cmd/arg/ARMillisDiff.java

@@ -4,7 +4,6 @@ import org.bukkit.command.CommandSender;
 
 import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.util.TimeDiffUtil;
-import com.massivecraft.massivecore.util.Txt;
 
 public class ARMillisDiff extends ArgReaderAbstract<Long>
 {
@@ -20,7 +19,7 @@ public class ARMillisDiff extends ArgReaderAbstract<Long>
 	// -------------------------------------------- //
 	
 	@Override
-	public Long read(String arg, CommandSender sender)
+	public Long read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		Long ret;
 		try
@@ -29,7 +28,7 @@ public class ARMillisDiff extends ArgReaderAbstract<Long>
 		}
 		catch (Exception e)
 		{
-			throw new MassiveCommandException(Txt.parse("<b>") + e.getMessage());
+			throw new MassiveCommandException().addMsg("<b>%s", e.getMessage());
 		}
 		
 		return ret;

src/com/massivecraft/massivecore/cmd/arg/ARPermission.java

@@ -20,7 +20,7 @@ public class ARPermission extends ArgReaderAbstract<Permission>
 	// -------------------------------------------- //
 	
 	@Override
-	public Permission read(String arg, CommandSender sender)
+	public Permission read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		Permission ret = null;
 		
@@ -33,7 +33,7 @@ public class ARPermission extends ArgReaderAbstract<Permission>
 		
 		if (ret == null)
 		{
-			throw new MassiveCommandException("<b>No permission with the name \"<h>" + arg + "<b>\" was found.");
+			throw new MassiveCommandException().addMsg("<b>No permission with the name \"<h>%s<b>\" was found.", arg);
 		}
 		
 		return ret;

src/com/massivecraft/massivecore/cmd/arg/ARSenderIdAbstract.java

@@ -44,7 +44,7 @@ public abstract class ARSenderIdAbstract<T> extends ArgReaderAbstract<T>
 	// -------------------------------------------- //
 	
 	@Override
-	public T read(String arg, CommandSender sender)
+	public T read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		// Create Ret
 		T ret;
@@ -60,7 +60,7 @@ public abstract class ARSenderIdAbstract<T> extends ArgReaderAbstract<T>
 		if (ret == null)
 		{
 			// No alternatives found
-			throw new MassiveCommandException("<b>No player matches \"<h>"+arg+"<b>\".");
+			throw new MassiveCommandException().addMsg("<b>No player matches \"<h>%s<b>\".", arg);
 		}
 	
 		// Return Ret

src/com/massivecraft/massivecore/cmd/arg/ARSet.java

@@ -5,6 +5,7 @@ import java.util.Set;
 
 import org.bukkit.command.CommandSender;
 
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.util.Txt;
 
 public class ARSet<T> extends ArgReaderAbstract<Set<T>>
@@ -40,7 +41,7 @@ public class ARSet<T> extends ArgReaderAbstract<Set<T>>
 	
 	// NOTE: Must be used with argConcatFrom and setErrorOnTooManyArgs(false).
 	@Override
-	public Set<T> read(String arg, CommandSender sender)
+	public Set<T> read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		// Split into inner args
 		String[] innerArgs = arg.split("\\s+");

src/com/massivecraft/massivecore/cmd/arg/ARSound.java

@@ -19,14 +19,14 @@ public class ARSound extends ArgReaderAbstract<Sound>
 	// -------------------------------------------- //
 	
 	@Override
-	public Sound read(String arg, CommandSender sender)
+	public Sound read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		Sound result = getSoundFromString(arg);
 		if (result == null)
 		{
 			MassiveCommandException errors = new MassiveCommandException();
-			errors.addErrorMsg("<b>No sound matches \"<h>"+arg+"<b>\".");
+			errors.addMsg("<b>No sound matches \"<h>%s<b>\".", arg);
-			errors.addErrorMsg("<aqua>https://hub.spigotmc.org/stash/projects/SPIGOT/repos/bukkit/browse/src/main/java/org/bukkit/Sound.java");
+			errors.addMsg("<aqua>https://hub.spigotmc.org/stash/projects/SPIGOT/repos/bukkit/browse/src/main/java/org/bukkit/Sound.java");
 			throw errors;
 		}
 		return result;

src/com/massivecraft/massivecore/cmd/arg/ARSoundEffect.java

@@ -4,7 +4,6 @@ import org.bukkit.command.CommandSender;
 
 import com.massivecraft.massivecore.SoundEffect;
 import com.massivecraft.massivecore.cmd.MassiveCommandException;
-import com.massivecraft.massivecore.util.Txt;
 
 public class ARSoundEffect extends ArgReaderAbstract<SoundEffect>
 {
@@ -20,7 +19,7 @@ public class ARSoundEffect extends ArgReaderAbstract<SoundEffect>
 	// -------------------------------------------- //
 	
 	@Override
-	public SoundEffect read(String arg, CommandSender sender)
+	public SoundEffect read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		SoundEffect ret;
 		
@@ -30,7 +29,7 @@ public class ARSoundEffect extends ArgReaderAbstract<SoundEffect>
 		}
 		catch (Exception e)
 		{
-			throw new MassiveCommandException(Txt.parse("<b>") + e.getMessage());
+			throw new MassiveCommandException().addMsg("<b>%s", e.getMessage());
 		}
 		return ret;
 	}

src/com/massivecraft/massivecore/cmd/arg/ARSoundEffects.java

@@ -8,7 +8,6 @@ import org.bukkit.command.CommandSender;
 
 import com.massivecraft.massivecore.SoundEffect;
 import com.massivecraft.massivecore.cmd.MassiveCommandException;
-import com.massivecraft.massivecore.util.Txt;
 
 /**
  * @deprecated use ARList
@@ -28,7 +27,7 @@ public class ARSoundEffects extends ArgReaderAbstract<List<SoundEffect>>
 	// -------------------------------------------- //
 	
 	@Override
-	public List<SoundEffect> read(String arg, CommandSender sender)
+	public List<SoundEffect> read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		List<SoundEffect> ret = new ArrayList<SoundEffect>();
 		List<SoundEffect> result = new ArrayList<SoundEffect>();
@@ -46,7 +45,7 @@ public class ARSoundEffects extends ArgReaderAbstract<List<SoundEffect>>
 		}
 		catch (Exception e)
 		{
-			throw new MassiveCommandException(Txt.parse("<b>") + e.getMessage());
+			throw new MassiveCommandException().addMsg("<b>%s", e.getMessage());
 		}
 		return ret;
 	}

src/com/massivecraft/massivecore/cmd/arg/ARUniverse.java

@@ -32,7 +32,7 @@ public class ARUniverse extends ArgReaderAbstract<String>
 	// -------------------------------------------- //
 	
 	@Override
-	public String read(String arg, CommandSender sender)
+	public String read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		String result = new String();
 		
@@ -42,11 +42,17 @@ public class ARUniverse extends ArgReaderAbstract<String>
 		}
 		else
 		{
-			MassiveCommandException errors = new MassiveCommandException();
+			MassiveCommandException exception = new MassiveCommandException();
-			errors.addErrorMsg("<b>No universe \"<h>" + arg + "<b>\" exists in multiverse <h>" + this.multiverse.getId() + "<b>.");
+			exception.addMsg("<b>No universe \"<h>%s<b>\" exists in multiverse <h>%s<b>.", arg, this.multiverse.getId());
+			
 			Collection<String> names = new ArrayList<String>(multiverse.getUniverses());
-			errors.addErrorMsg("<i>Use " + Txt.implodeCommaAndDot(names, "<h>%s", "<i>, ", " <i>or ", "<i>."));
+			String format = Txt.parse("<h>%s");
-			throw errors;
+			String comma = Txt.parse("<i>, ");
+			String and = Txt.parse(" <i>or ");
+			String dot = Txt.parse("<i>.");
+			exception.addMsg("<i>Use %s", Txt.implodeCommaAndDot(names, format, comma, and, dot));
+			
+			throw exception;
 		}
 		
 		return result;

src/com/massivecraft/massivecore/cmd/arg/ARWorld.java

@@ -20,7 +20,7 @@ public class ARWorld extends ArgReaderAbstract<World>
 	// -------------------------------------------- //
 	
 	@Override
-	public World read(String arg, CommandSender sender)
+	public World read(String arg, CommandSender sender) throws MassiveCommandException
 	{
 		World ret;
 		
@@ -32,7 +32,7 @@ public class ARWorld extends ArgReaderAbstract<World>
 		
 		if (ret == null)
 		{
-			throw new MassiveCommandException("<b>The world could not be found.");
+			throw new MassiveCommandException().addMsg("<b>The world \"<h>%s<b>\" could not be found.", arg);
 		}
 		
 		return ret;

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreBufferAdd.java

@@ -32,7 +32,6 @@ public class CmdMassiveCoreBufferAdd extends MassiveCommand
 	public void perform()
 	{
 		String string = this.argConcatFrom(0);
-		if (string == null) return;
 		
 		String buffer = MassiveCoreEngineVariable.getBuffer(sender);
 		buffer += string;

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreBufferSet.java

@@ -32,7 +32,6 @@ public class CmdMassiveCoreBufferSet extends MassiveCommand
 	public void perform()
 	{
 		String string = this.argConcatFrom(0);
-		if (string == null) return;
 		
 		MassiveCoreEngineVariable.setBuffer(sender, string);
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreBufferWhitespace.java

@@ -3,6 +3,7 @@ package com.massivecraft.massivecore.cmd.massivecore;
 import com.massivecraft.massivecore.MassiveCoreEngineVariable;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARInteger;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 import com.massivecraft.massivecore.util.Txt;
@@ -30,10 +31,9 @@ public class CmdMassiveCoreBufferWhitespace extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Integer times = this.arg(0, ARInteger.get(), 1);
-		if (times == null) return;
 		
 		String string = Txt.repeat(" ", times);
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreHearsound.java

@@ -5,6 +5,7 @@ import java.util.List;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.SoundEffect;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARList;
 import com.massivecraft.massivecore.cmd.arg.ARSoundEffect;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
@@ -35,11 +36,10 @@ public class CmdMassiveCoreHearsound extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		// Args
 		List<SoundEffect> soundEffects = this.argConcatFrom(0, ARList.get(ARSoundEffect.get()));
-		if (soundEffects == null) return;
 		
 		// Apply
 		SoundEffect.runAll(soundEffects, me);

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreStoreListcolls.java

@@ -7,6 +7,7 @@ import com.massivecraft.massivecore.ConfServer;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.NaturalOrderComparator;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARString;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 import com.massivecraft.massivecore.store.Coll;
@@ -37,7 +38,7 @@ public class CmdMassiveCoreStoreListcolls extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		// Args
 		final String dbAlias = this.arg(0, ARString.get(), ConfServer.dburi);

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreStoreStats.java

@@ -4,6 +4,7 @@ import java.util.Map.Entry;
 
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARColl;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 import com.massivecraft.massivecore.store.Coll;
@@ -34,7 +35,7 @@ public class CmdMassiveCoreStoreStats extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		if (!this.argIsSet(0) || this.arg(0).equalsIgnoreCase(Coll.TOTAL))
 		{
@@ -43,7 +44,6 @@ public class CmdMassiveCoreStoreStats extends MassiveCommand
 		else
 		{
 			Coll<?> coll = this.arg(0, ARColl.get());
-			if (coll == null) return;
 			this.performColl(coll);
 		}
 	}

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreTest.java

@@ -5,6 +5,7 @@ import org.bukkit.entity.Player;
 
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.VisibilityMode;
 import com.massivecraft.massivecore.cmd.arg.AREnum;
 import com.massivecraft.massivecore.cmd.arg.ARFloat;
@@ -45,28 +46,18 @@ public class CmdMassiveCoreTest extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		// Args
 		ParticleEffect particleEffect = this.arg(0, AREnum.get(ParticleEffect.class));
-		if (particleEffect == null) return;
 		
 		Location center = me.getEyeLocation().add(0, 0, 0);
 		
 		Float offsetX = this.arg(1, ARFloat.get());
-		if (offsetX == null) return;
-		
 		Float offsetY = this.arg(2, ARFloat.get());
-		if (offsetY == null) return;
-		
 		Float offsetZ = this.arg(3, ARFloat.get());
-		if (offsetZ == null) return;
-		
 		Float speed = this.arg(4, ARFloat.get());
-		if (speed == null) return;
-		
 		Integer amount = this.arg(5, ARInteger.get());
-		if (amount == null) return;
 		
 		Player player = me;
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysAspectList.java

@@ -7,6 +7,7 @@ import com.massivecraft.massivecore.Aspect;
 import com.massivecraft.massivecore.AspectColl;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARInteger;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 import com.massivecraft.massivecore.util.Txt;
@@ -34,11 +35,10 @@ public class CmdMassiveCoreUsysAspectList extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		// Args
 		Integer pageHumanBased = this.arg(0, ARInteger.get(), 1);
-		if (pageHumanBased == null) return;
 		
 		// Create Lines
 		List<String> lines = new ArrayList<String>();

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysAspectShow.java

@@ -3,6 +3,7 @@ package com.massivecraft.massivecore.cmd.massivecore;
 import com.massivecraft.massivecore.Aspect;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARAspect;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 import com.massivecraft.massivecore.util.Txt;
@@ -30,10 +31,9 @@ public class CmdMassiveCoreUsysAspectShow extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Aspect aspect = this.arg(0, ARAspect.get());
-		if (aspect == null) return;
 		
 		msg(Txt.titleize("Aspect: "+aspect.getId()));
 		msg("<k>using multiverse: <v>%s",aspect.getMultiverse().getId());

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysAspectUse.java

@@ -4,6 +4,7 @@ import com.massivecraft.massivecore.Aspect;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.Multiverse;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARAspect;
 import com.massivecraft.massivecore.cmd.arg.ARMultiverse;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
@@ -32,13 +33,10 @@ public class CmdMassiveCoreUsysAspectUse extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Aspect aspect = this.arg(0, ARAspect.get());
-		if (aspect == null) return;
-		
 		Multiverse multiverse = this.arg(1, ARMultiverse.get());
-		if (multiverse == null) return;
 		
 		aspect.setMultiverse(multiverse);
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysMultiverseDel.java

@@ -4,6 +4,7 @@ import com.massivecraft.massivecore.MassiveCore;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.Multiverse;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARMultiverse;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 
@@ -30,10 +31,9 @@ public class CmdMassiveCoreUsysMultiverseDel extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Multiverse multiverse = this.arg(0, ARMultiverse.get());
-		if (multiverse == null) return;
 		
 		String id = multiverse.getId();
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysMultiverseList.java

@@ -7,6 +7,7 @@ import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.Multiverse;
 import com.massivecraft.massivecore.MultiverseColl;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARInteger;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 import com.massivecraft.massivecore.util.Txt;
@@ -34,11 +35,10 @@ public class CmdMassiveCoreUsysMultiverseList extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		// Args
 		Integer pageHumanBased = this.arg(0, ARInteger.get(), 1);
-		if (pageHumanBased == null) return;
 		
 		// Create Lines
 		List<String> lines = new ArrayList<String>();

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysMultiverseShow.java

@@ -8,6 +8,7 @@ import com.massivecraft.massivecore.MassiveCore;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.Multiverse;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARMultiverse;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 import com.massivecraft.massivecore.util.Txt;
@@ -35,10 +36,9 @@ public class CmdMassiveCoreUsysMultiverseShow extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Multiverse multiverse = this.arg(0, ARMultiverse.get());
-		if (multiverse == null) return;
 		
 		msg(Txt.titleize("Multiverse: "+multiverse.getId()));
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysUniverseClear.java

@@ -4,6 +4,7 @@ import com.massivecraft.massivecore.MassiveCore;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.Multiverse;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARMultiverse;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 
@@ -31,10 +32,9 @@ public class CmdMassiveCoreUsysUniverseClear extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Multiverse multiverse = this.arg(1, ARMultiverse.get());
-		if (multiverse == null) return;
 		
 		String universe = this.arg(0);
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysUniverseDel.java

@@ -4,6 +4,7 @@ import com.massivecraft.massivecore.MassiveCore;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.Multiverse;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARMultiverse;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 
@@ -31,10 +32,9 @@ public class CmdMassiveCoreUsysUniverseDel extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Multiverse multiverse = this.arg(1, ARMultiverse.get());
-		if (multiverse == null) return;
 		
 		String universe = this.arg(0);
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysUniverseNew.java

@@ -3,6 +3,7 @@ package com.massivecraft.massivecore.cmd.massivecore;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.Multiverse;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARMultiverse;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 
@@ -30,10 +31,9 @@ public class CmdMassiveCoreUsysUniverseNew extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Multiverse multiverse = this.arg(1, ARMultiverse.get());
-		if (multiverse == null) return;
 		
 		String universe = this.arg(0);
 		

src/com/massivecraft/massivecore/cmd/massivecore/CmdMassiveCoreUsysWorld.java

@@ -3,6 +3,7 @@ package com.massivecraft.massivecore.cmd.massivecore;
 import com.massivecraft.massivecore.MassiveCorePerm;
 import com.massivecraft.massivecore.Multiverse;
 import com.massivecraft.massivecore.cmd.MassiveCommand;
+import com.massivecraft.massivecore.cmd.MassiveCommandException;
 import com.massivecraft.massivecore.cmd.arg.ARMultiverse;
 import com.massivecraft.massivecore.cmd.req.ReqHasPerm;
 
@@ -31,10 +32,9 @@ public class CmdMassiveCoreUsysWorld extends MassiveCommand
 	// -------------------------------------------- //
 	
 	@Override
-	public void perform()
+	public void perform() throws MassiveCommandException
 	{
 		Multiverse multiverse = this.arg(2, ARMultiverse.get());
-		if (multiverse == null) return;
 		
 		String universe = this.arg(1);
 		String worldName = this.arg(0);