Use empty world if the given file is not present in the loader

hollow-cube · Jul 2, 2023 · a91d3c6 · a91d3c6
1 parent 108646e
commit a91d3c6
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Showing 2 changed files with 12 additions and 2 deletions.
diff --git a/src/main/java/net/hollowcube/polar/PolarLoader.java b/src/main/java/net/hollowcube/polar/PolarLoader.java
@@ -23,6 +23,7 @@
 import java.io.InputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
 import java.util.*;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
@@ -44,8 +45,12 @@ public class PolarLoader implements IChunkLoader {
     private final PolarWorld worldData;
 
     public PolarLoader(@NotNull Path path) throws IOException {
-        this.worldData = PolarReader.read(Files.readAllBytes(path));
         this.savePath = path;
+        if (Files.exists(path)) {
+            this.worldData = PolarReader.read(Files.readAllBytes(path));
+        } else {
+            this.worldData = new PolarWorld();
+        }
     }
 
     public PolarLoader(@NotNull InputStream inputStream) throws IOException {
@@ -198,7 +203,8 @@ public void unloadChunk(Chunk chunk) {
         if (savePath != null) {
             return CompletableFuture.runAsync(() -> {
                 try {
-                    Files.write(savePath, PolarWriter.write(worldData));
+                    Files.write(savePath, PolarWriter.write(worldData),
+                            StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
                 } catch (IOException e) {
                     EXCEPTION_HANDLER.handleException(new RuntimeException("Failed to save world", e));
                 }

diff --git a/src/main/java/net/hollowcube/polar/PolarWorld.java b/src/main/java/net/hollowcube/polar/PolarWorld.java
@@ -32,6 +32,10 @@ public class PolarWorld {
     // Chunk data
     private final Long2ObjectMap<PolarChunk> chunks = new Long2ObjectOpenHashMap<>();
 
+    public PolarWorld() {
+        this(LATEST_VERSION, DEFAULT_COMPRESSION, (byte) -4, (byte) 19, List.of());
+    }
+
     public PolarWorld(
             short version,
             @NotNull CompressionType compression,