Gson testing

src/main/java/net/islandearth/rpgregions/RPGRegions.java

@@ -7,10 +7,14 @@ import net.islandearth.languagy.language.LanguagyImplementation;
 import net.islandearth.languagy.language.LanguagyPluginHook;
 import net.islandearth.languagy.language.Translator;
 import net.islandearth.rpgregions.api.RPGRegionsAPI;
+import net.islandearth.rpgregions.gson.InterfaceAdapter;
 import net.islandearth.rpgregions.listener.ConnectionListener;
 import net.islandearth.rpgregions.listener.MoveListener;
 import net.islandearth.rpgregions.listener.RegionListener;
 import net.islandearth.rpgregions.managers.RPGRegionsManagers;
+import net.islandearth.rpgregions.rewards.DiscoveryReward;
+import net.islandearth.rpgregions.rewards.ExperienceReward;
+import net.islandearth.rpgregions.rewards.ItemReward;
 import net.islandearth.rpgregions.translation.Translations;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
@@ -122,6 +126,10 @@ public final class RPGRegions extends JavaPlugin implements RPGRegionsAPI, Langu
 	}
 
 	public Gson getGson() {
-		return new GsonBuilder().setPrettyPrinting().serializeNulls().create();
+		return new GsonBuilder()
+				.registerTypeAdapter(DiscoveryReward.class, new InterfaceAdapter<ItemReward>())
+				.registerTypeAdapter(DiscoveryReward.class, new InterfaceAdapter<ExperienceReward>())
+				.setPrettyPrinting()
+				.serializeNulls().create();
 	}
 }

src/main/java/net/islandearth/rpgregions/gson/InterfaceAdapter.java

@@ -0,0 +1,49 @@
+package net.islandearth.rpgregions.gson;
+
+import com.google.gson.*;
+
+import java.lang.reflect.Type;
+
+public class InterfaceAdapter<T>
+    implements JsonSerializer<T>, JsonDeserializer<T> {
+
+    @Override
+    public final JsonElement serialize(final T object, final Type interfaceType, final JsonSerializationContext context) {
+        final JsonObject member = new JsonObject();
+
+        member.addProperty("type", object.getClass().getName());
+
+        member.add("data", context.serialize(object));
+
+        return member;
+    }
+
+    @Override
+    public final T deserialize(final JsonElement elem, final Type interfaceType, final JsonDeserializationContext context)
+            throws JsonParseException {
+        final JsonObject member = (JsonObject) elem;
+        final JsonElement typeString = get(member, "type");
+        final JsonElement data = get(member, "data");
+        final Type actualType = typeForName(typeString);
+
+        return context.deserialize(data, actualType);
+    }
+
+    private Type typeForName(final JsonElement typeElem) {
+        try {
+            return Class.forName(typeElem.getAsString());
+        } catch (ClassNotFoundException e) {
+            throw new JsonParseException(e);
+        }
+    }
+
+    private JsonElement get(final JsonObject wrapper, final String memberName) {
+        final JsonElement elem = wrapper.get(memberName);
+
+        if (elem == null) {
+            throw new JsonParseException(
+                    "no '" + memberName + "' member found in json file.");
+        }
+        return elem;
+    }
+}

src/main/java/net/islandearth/rpgregions/managers/RPGRegionsManagers.java

@@ -1,5 +1,6 @@
 package net.islandearth.rpgregions.managers;
 
+import com.google.gson.Gson;
 import net.islandearth.rpgregions.RPGRegions;
 import net.islandearth.rpgregions.api.integrations.IntegrationManager;
 import net.islandearth.rpgregions.api.integrations.IntegrationType;
@@ -7,9 +8,15 @@ import net.islandearth.rpgregions.managers.data.RPGRegionsCache;
 import net.islandearth.rpgregions.managers.data.StorageManager;
 import net.islandearth.rpgregions.managers.data.StorageType;
 import net.islandearth.rpgregions.managers.data.region.ConfiguredRegion;
+import net.islandearth.rpgregions.rewards.DiscoveryReward;
+import net.islandearth.rpgregions.rewards.ExperienceReward;
 
 import java.io.File;
 import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 public class RPGRegionsManagers {
 
@@ -33,12 +40,27 @@ public class RPGRegionsManagers {
 		File folder = new File(plugin.getDataFolder() + "/regions/");
 		if (!folder.exists()) folder.mkdirs();
 
+		List<DiscoveryReward> rewards = new ArrayList<>();
+		rewards.add(new ExperienceReward(10));
+		ConfiguredRegion configuredRegion = new ConfiguredRegion("docks-1", rewards);
+		regionsCache.addConfiguredRegion(configuredRegion);
+		File file1 = new File(plugin.getDataFolder() + "/regions/" + "docks-1" + ".json");
+		if (!file1.exists()) {
+			try {
+				file1.createNewFile();
+				Gson gson = plugin.getGson();
+				gson.toJson(configuredRegion, new FileWriter(file1));
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+
 		for (File file : folder.listFiles()) {
 			// Exclude non-json files
 			if (file.getName().endsWith(".json")) {
 				try {
 					ConfiguredRegion region = plugin.getGson().fromJson(new FileReader(file), ConfiguredRegion.class);
-					plugin.getManagers().getRegionsCache().addConfiguredRegion(region);
+					regionsCache.addConfiguredRegion(region);
 				} catch (Exception e) {
 					plugin.getLogger().severe("Error loading region config " + file.getName() + ":");
 					e.printStackTrace();

src/main/java/net/islandearth/rpgregions/managers/data/region/ConfiguredRegion.java

@@ -1,7 +1,11 @@
 package net.islandearth.rpgregions.managers.data.region;
 
+import net.islandearth.rpgregions.RPGRegions;
 import net.islandearth.rpgregions.rewards.DiscoveryReward;
 
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
 import java.util.List;
 
 public class ConfiguredRegion {
@@ -9,6 +13,11 @@ public class ConfiguredRegion {
 	private String id;
 	private List<DiscoveryReward> rewards;
 
+	public ConfiguredRegion(String id, List<DiscoveryReward> rewards) {
+		this.id = id;
+		this.rewards = rewards;
+	}
+
 	public void setId(String id) {
 		this.id = id;
 	}
@@ -24,4 +33,9 @@ public class ConfiguredRegion {
 	public List<DiscoveryReward> getRewards() {
 		return rewards;
 	}
+
+	public void save(RPGRegions plugin) throws IOException {
+		File file = new File(plugin.getDataFolder() + "/regions/" + this.id + ".yml");
+		plugin.getGson().toJson(this, new FileWriter(file));
+	}
 }

src/main/java/net/islandearth/rpgregions/rewards/DiscoveryReward.java

@@ -4,15 +4,7 @@ import org.bukkit.entity.Player;
 
 public abstract class DiscoveryReward {
 	
-	private final String region;
-	
-	DiscoveryReward(String region) {
-		this.region = region;
-	}
-	
-	public String getRegion() {
-		return region;
-	}
-	
-	abstract void award(Player player);
+	public abstract void award(Player player);
+
+	public abstract String getName();
 }

src/main/java/net/islandearth/rpgregions/rewards/ExperienceReward.java

@@ -6,13 +6,17 @@ public class ExperienceReward extends DiscoveryReward {
 	
 	private final int xp;
 	
-	ExperienceReward(String region, int xp) {
-		super(region);
+	public ExperienceReward(int xp) {
 		this.xp = xp;
 	}
 	
 	@Override
-	void award(Player player) {
+	public void award(Player player) {
 		player.giveExp(xp);
 	}
+
+	@Override
+	public String getName() {
+		return "Experience";
+	}
 }

src/main/java/net/islandearth/rpgregions/rewards/ItemReward.java

@@ -7,15 +7,19 @@ public class ItemReward extends DiscoveryReward {
 	
 	private final ItemStack item;
 	
-	ItemReward(String region, ItemStack item) {
-		super(region);
+	public ItemReward(ItemStack item) {
 		this.item = item;
 	}
 	
 	@Override
-	void award(Player player) {
+	public void award(Player player) {
 		player.getInventory().addItem(item).forEach((pos, item) -> {
 			player.getLocation().getWorld().dropItemNaturally(player.getLocation(), item);
 		});
 	}
+
+	@Override
+	public String getName() {
+		return "Item";
+	}
 }