Only fetches name from UUID if necessary

Also fixes some minor warnings

src/main/java/net/knarcraft/stargate/portal/Portal.java

@@ -54,7 +54,7 @@ public class Portal {
         this.network = portalStrings.network();
         this.name = portalStrings.name();
         this.portalOwner = portalOwner;
-        this.options = new PortalOptions(options, portalStrings.destination().length() > 0);
+        this.options = new PortalOptions(options, !portalStrings.destination().isEmpty());
         this.signDrawer = new PortalSignDrawer(this);
         this.portalOpener = new PortalOpener(this, portalStrings.destination());
         this.structure = new PortalStructure(this, gate, button);

src/main/java/net/knarcraft/stargate/portal/PortalActivator.java

@@ -74,7 +74,7 @@ public class PortalActivator {
         if (portal.getOptions().isRandom()) {
             //Find possible destinations
             List<String> destinations = PortalHandler.getDestinations(portal, player, portalNetwork);
-            if (destinations.size() == 0) {
+            if (destinations.isEmpty()) {
                 return null;
             }
             //Get one random destination
@@ -217,7 +217,7 @@ public class PortalActivator {
      * @return <p>Whether this portal activator's portal is active</p>
      */
     public boolean isActive() {
-        return portal.getOptions().isFixed() || (destinations.size() > 0);
+        return portal.getOptions().isFixed() || (!destinations.isEmpty());
     }
 
     /**
@@ -255,7 +255,7 @@ public class PortalActivator {
         }
 
         //If no destinations are available, just tell the player and quit
-        if (destinations.size() == 0) {
+        if (destinations.isEmpty()) {
             if (!portal.getOptions().isSilent()) {
                 Stargate.getMessageSender().sendErrorMessage(player, Stargate.getString(Message.NO_DESTINATION));
             }

src/main/java/net/knarcraft/stargate/portal/PortalCreator.java

@@ -171,7 +171,7 @@ public class PortalCreator {
         String route = "PortalCreator::getNetworkName";
 
         //Use default network if a proper alternative is not set
-        if (portalStrings.network().length() < 1 || portalStrings.network().length() > getMaxNameNetworkLength()) {
+        if (portalStrings.network().isEmpty() || portalStrings.network().length() > getMaxNameNetworkLength()) {
             network = Stargate.getDefaultNetwork();
         }
 
@@ -207,7 +207,7 @@ public class PortalCreator {
         }
 
         //Check if the user can create portals to this world.
-        if (!bungee && destinationName.length() > 0) {
+        if (!bungee && !destinationName.isEmpty()) {
             Portal destinationPortal = PortalHandler.getByName(destinationName, network);
             if (destinationPortal != null && destinationPortal.getWorld() != null) {
                 String world = destinationPortal.getWorld().getName();
@@ -294,7 +294,7 @@ public class PortalCreator {
         String route = "PortalCreator::checkIfNewPortalIsValid";
 
         //Check if the portal name can fit on the sign with padding (>name<)
-        if (portal.getCleanName().length() < 1 || portal.getCleanName().length() > getMaxNameNetworkLength()) {
+        if (portal.getCleanName().isEmpty() || portal.getCleanName().length() > getMaxNameNetworkLength()) {
             Stargate.debug(route, String.format("Name length error. %s is too long.",
                     portal.getCleanName()));
             Stargate.getMessageSender().sendErrorMessage(player, Stargate.getString(Message.CREATION_NAME_LENGTH));

src/main/java/net/knarcraft/stargate/portal/PortalHandler.java

@@ -251,7 +251,7 @@ public class PortalHandler {
         }
 
         //Can not create a non-fixed always-on portal
-        if (portalOptions.get(PortalOption.ALWAYS_ON) && destinationName.length() == 0) {
+        if (portalOptions.get(PortalOption.ALWAYS_ON) && destinationName.isEmpty()) {
             portalOptions.put(PortalOption.ALWAYS_ON, false);
         }
 

src/main/java/net/knarcraft/stargate/portal/PortalRegistry.java

@@ -255,7 +255,7 @@ public class PortalRegistry {
      * @param portal <p>The portal to register</p>
      */
     public static void registerPortal(@NotNull Portal portal) {
-        portal.getOptions().setFixed(portal.getDestinationName().length() > 0 || portal.getOptions().isRandom() ||
+        portal.getOptions().setFixed(!portal.getDestinationName().isEmpty() || portal.getOptions().isRandom() ||
                 portal.getOptions().isBungee());
 
         String portalName = portal.getCleanName();

src/main/java/net/knarcraft/stargate/portal/property/PortalOwner.java

@@ -6,8 +6,6 @@ import org.bukkit.OfflinePlayer;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.HashMap;
-import java.util.Map;
 import java.util.UUID;
 
 /**
@@ -15,7 +13,6 @@ import java.util.UUID;
  */
 public class PortalOwner {
 
-    private static final Map<String, OfflinePlayer> fetchedPlayers = new HashMap<>();
     private UUID ownerUUID;
     private String ownerName;
 
@@ -25,13 +22,7 @@ public class PortalOwner {
      * @param ownerIdentifier <p>A UUID, or a username for legacy support</p>
      */
     public PortalOwner(@NotNull String ownerIdentifier) {
-        if (fetchedPlayers.containsKey(ownerIdentifier)) {
-            OfflinePlayer player = fetchedPlayers.get(ownerIdentifier);
-            this.ownerUUID = player.getUniqueId();
-            this.ownerName = player.getName();
-        } else {
-            parseIdentifier(ownerIdentifier);
-        }
+        parseIdentifier(ownerIdentifier);
     }
 
     /**
@@ -77,6 +68,12 @@ public class PortalOwner {
      */
     @NotNull
     public String getName() {
+        if (this.ownerUUID != null && this.ownerName == null) {
+            this.ownerName = fetchName();
+            if (this.ownerName == null) {
+                this.ownerName = "UNKNOWN!";
+            }
+        }
         return ownerName;
     }
 
@@ -108,14 +105,11 @@ public class PortalOwner {
      */
     private void parseIdentifier(@NotNull String ownerIdentifier) {
         UUID ownerUUID = null;
-        String ownerName;
+        String ownerName = null;
         if (ownerIdentifier.length() > 16) {
             //If more than 16 characters, the string cannot be a username, so it's probably a UUID
             try {
                 ownerUUID = UUID.fromString(ownerIdentifier);
-                OfflinePlayer offlineOwner = Bukkit.getServer().getOfflinePlayer(ownerUUID);
-                fetchedPlayers.put(ownerIdentifier, offlineOwner);
-                ownerName = offlineOwner.getName();
             } catch (IllegalArgumentException exception) {
                 //Invalid as UUID and username, so just keep it as owner name and hope the server owner fixes it
                 ownerName = ownerIdentifier;
@@ -129,4 +123,14 @@ public class PortalOwner {
         this.ownerUUID = ownerUUID;
     }
 
+    /**
+     * Gets the name of a player
+     *
+     * @return <p>The player to get the name of</p>
+     */
+    @Nullable
+    private String fetchName() {
+        return Bukkit.getServer().getOfflinePlayer(ownerUUID).getName();
+    }
+
 }