From ec275caf546e0b7bda361cb79ec69649ff8b13c3 Mon Sep 17 00:00:00 2001
From: DmitriyMX <dimon550@gmail.com>
Date: Thu, 18 Oct 2018 01:29:32 +0300
Subject: [PATCH] =?UTF-8?q?=D0=B4=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D0=B5?=
 =?UTF-8?q?=D0=BD=20RegionManager?=
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---
 .../java/mc/world/anvil/RegionManager.java    | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 anvil-loader/src/main/java/mc/world/anvil/RegionManager.java

diff --git a/anvil-loader/src/main/java/mc/world/anvil/RegionManager.java b/anvil-loader/src/main/java/mc/world/anvil/RegionManager.java
new file mode 100644
index 0000000..dfd1843
--- /dev/null
+++ b/anvil-loader/src/main/java/mc/world/anvil/RegionManager.java
@@ -0,0 +1,44 @@
+package mc.world.anvil;
+
+import gnu.trove.map.TIntObjectMap;
+import gnu.trove.map.hash.TIntObjectHashMap;
+import lombok.extern.slf4j.Slf4j;
+import mc.core.utils.CompactedCoords;
+import org.springframework.lang.Nullable;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+@Slf4j
+class RegionManager {
+    private final Path regionFilesPath;
+    private final TIntObjectMap<Region> regions = new TIntObjectHashMap<>();
+
+    RegionManager(Path regionFilesPath) {
+        this.regionFilesPath = regionFilesPath;
+    }
+
+    @Nullable
+    public Region getRegion(int x, int z) {
+        final int xz = CompactedCoords.compressXZ(x, z);
+
+        if (regions.containsKey(xz)) {
+            return regions.get(xz);
+        } else {
+            Path regionFilePath = regionFilesPath.resolve("r." + x + "." + z + ".mca");
+            if (Files.exists(regionFilePath)) {
+                try {
+                    Region region = new Region(regionFilePath.toFile());
+                    regions.put(xz, region);
+                    return region;
+                } catch (IOException e) {
+                    log.error("load region from file", e);
+                    return null;
+                }
+            } else {
+                return null;
+            }
+        }
+    }
+}