fix: constructor invocation & empty messages

build.gradle.kts

@@ -3,7 +3,7 @@ import org.gradle.api.JavaVersion.VERSION_1_8
 val specTitle = "JAlec"
 val artifact = specTitle.lowercase()
 group = "net.anvilcraft"
-version = "0.1.1"
+version = "0.1.2"
 
 plugins {
     id("java")

src/main/java/net/anvilcraft/alec/jalec/strategies/implementations/FormatStringAlecMessageGeneratorStrategy.java

@@ -7,6 +7,9 @@ import net.anvilcraft.alec.jalec.strategies.interfaces.IAlecMessageGeneratorStra
 public class FormatStringAlecMessageGeneratorStrategy implements IAlecMessageGeneratorStrategy {
     @Override
     public String generateAlecMessage(Object... args) {
-        return String.format(args[0].toString(), Arrays.copyOfRange(args, 1, args.length));
+        String msg = String.format(args[0].toString(), Arrays.copyOfRange(args, 1, args.length));
+        if (msg.isEmpty())
+            return null;
+        return msg;
     }
 }

src/main/java/net/anvilcraft/alec/jalec/strategies/implementations/PlainAlecMessageGeneratorStrategy.java

@@ -13,6 +13,9 @@ public class PlainAlecMessageGeneratorStrategy implements IAlecMessageGeneratorS
             }
         }
 
+        if (sb.length() == 0)
+            return null;
+
         return sb.toString();
     }
 }

src/main/java/net/anvilcraft/alec/jalec/strategies/implementations/StandardConstructorAlecExceptionConstructionStrategy.java

@@ -12,7 +12,7 @@ public class StandardConstructorAlecExceptionConstructionStrategy<E extends IAle
     public E constructAlecException(String message, Throwable cause, Class<E> alecExceptionClass) {
         try {
             Constructor<E> constructor
-                = alecExceptionClass.getConstructor(String.class, Throwable.class);
+                = alecExceptionClass.getDeclaredConstructor(String.class, Throwable.class);
 
             constructor.setAccessible(true);