Refactor ChunkPos

Author: basdxz

src/main/java/com/falsepattern/lib/compat/ChunkPos.java

@@ -1,100 +1,111 @@
 package com.falsepattern.lib.compat;
 
 import com.falsepattern.lib.StableAPI;
+import lombok.*;
 import net.minecraft.entity.Entity;
 
 import javax.annotation.concurrent.Immutable;
 
+/**
+ * A functional equivalent to ChunkPos present in Minecraft 1.12.
+ */
 @Immutable
+@EqualsAndHashCode
+@AllArgsConstructor
 @StableAPI(since = "0.6.0")
 public class ChunkPos {
     /**
-     * The X position of this Chunk Coordinate Pair
+     * The x position of the chunk.
      */
     public final int x;
     /**
-     * The Z position of this Chunk Coordinate Pair
+     * The z position of the chunk.
      */
     public final int z;
 
-    public ChunkPos(int x, int z) {
-        this.x = x;
-        this.z = z;
-    }
-
-    public ChunkPos(BlockPos pos) {
-        this.x = pos.getX() >> 4;
-        this.z = pos.getZ() >> 4;
+    /**
+     * Instantiates a new ChunkPos.
+     *
+     * @param blockPos the block pos
+     */
+    public ChunkPos(@NonNull BlockPos blockPos) {
+        x = blockPos.getX() >> 4;
+        z = blockPos.getZ() >> 4;
     }
 
     /**
      * Converts the chunk coordinate pair to a long
+     *
+     * @param x the chunk x
+     * @param z the chunk x
+     * @return the unique chunk long
      */
     public static long asLong(int x, int z) {
-        return (long) x & 4294967295L | ((long) z & 4294967295L) << 32;
-    }
-
-    public int hashCode() {
-        int i = 1664525 * this.x + 1013904223;
-        int j = 1664525 * (this.z ^ -559038737) + 1013904223;
-        return i ^ j;
-    }
-
-    public boolean equals(Object p_equals_1_) {
-        if (this == p_equals_1_) {
-            return true;
-        } else if (!(p_equals_1_ instanceof ChunkPos)) {
-            return false;
-        } else {
-            ChunkPos chunkpos = (ChunkPos) p_equals_1_;
-            return this.x == chunkpos.x && this.z == chunkpos.z;
-        }
+        return (long) x & 0xFFFFFFFFL | ((long) z & 0xFFFFFFFFL) << 32;
     }
 
-    public double getDistanceSq(Entity entityIn) {
-        double d0 = this.x * 16 + 8;
-        double d1 = this.z * 16 + 8;
-        double d2 = d0 - entityIn.posX;
-        double d3 = d1 - entityIn.posZ;
-        return d2 * d2 + d3 * d3;
+    /**
+     * Gets distance sq.
+     *
+     * @param entity the entity
+     * @return the distance sq
+     */
+    public double getDistanceSq(@NonNull Entity entity) {
+        val dX = ((x << 4) + 8) - entity.posX;
+        val dY = ((z << 4) + 8) - entity.posZ;
+        return dX * dX + dY * dY;
     }
 
     /**
-     * Get the first world X coordinate that belongs to this Chunk
+     * Get the first x pos inside this chunk.
+     *
+     * @return the x start
      */
     public int getXStart() {
-        return this.x << 4;
+        return x << 4;
     }
 
     /**
-     * Get the first world Z coordinate that belongs to this Chunk
+     * Get the first z pos inside this chunk.
+     *
+     * @return the z start
      */
     public int getZStart() {
-        return this.z << 4;
+        return z << 4;
     }
 
     /**
-     * Get the last world X coordinate that belongs to this Chunk
+     * Get the last x pos inside this chunk.
+     *
+     * @return the x end
      */
     public int getXEnd() {
-        return (this.x << 4) + 15;
+        return (x << 4) + 15;
     }
 
     /**
-     * Get the last world Z coordinate that belongs to this Chunk
+     * Get the last z pos inside this chunk.
+     *
+     * @return the z end
      */
     public int getZEnd() {
-        return (this.z << 4) + 15;
+        return (z << 4) + 15;
     }
 
     /**
-     * Get the World coordinates of the Block with the given Chunk coordinates relative to this chunk
+     * Get BlockPos with respect to this chunk.
+     *
+     * @param x the x pos
+     * @param y the y pos
+     * @param z the z pos
+     * @return the relative block position
      */
     public BlockPos getBlock(int x, int y, int z) {
         return new BlockPos((this.x << 4) + x, y, (this.z << 4) + z);
     }
 
+    @Override
     public String toString() {
-        return "[" + this.x + ", " + this.z + "]";
+        return String.format("[%d, %d]", x, z);
     }
 }