Mod biomes are once again copied to our world type

build.properties

@@ -1,4 +1,4 @@
 minecraft_version=1.8.9
-forge_version=11.15.0.1684
+forge_version=11.15.0.1696
 mod_version=3.0.0
 mappings_version=snapshot_nodoc_20160104

src/main/java/biomesoplenty/common/init/ModCompatibility.java

@@ -1,8 +1,19 @@
 package biomesoplenty.common.init;
 
+import java.util.List;
+
+import com.google.common.base.Function;
+import com.google.common.collect.Lists;
+
+import biomesoplenty.common.enums.BOPClimates;
 import biomesoplenty.common.integration.ThaumcraftCompat;
 import biomesoplenty.core.BiomesOPlenty;
+import net.minecraft.world.biome.BiomeGenBase;
+import net.minecraftforge.common.BiomeManager;
+import net.minecraftforge.common.BiomeManager.BiomeEntry;
+import net.minecraftforge.common.BiomeManager.BiomeType;
 import net.minecraftforge.fml.common.Loader;
+import net.minecraftforge.fml.relauncher.ReflectionHelper;
 
 public class ModCompatibility 
 {
@@ -19,5 +30,84 @@ public class ModCompatibility
                 BiomesOPlenty.logger.error("There was an error while integrating Thaumcraft with Biomes O' Plenty", e);
             }
         }
+        
+        copyModBiomeWeights();
+    }
+    
+    private static void copyModBiomeWeights()
+    {
+        try 
+        {
+            // An array containing lists of default biome entries for only standard BiomeTypes
+            List<BiomeEntry>[] vanillaBiomes = (List<BiomeEntry>[])ReflectionHelper.findMethod(BiomeManager.class, null, new String[] { "setupBiomes" }).invoke(null);
+            
+            for (BiomeType type : BiomeManager.BiomeType.values())
+            {                
+                // Creates a mutable version of the current biome type's biome array and wraps entries to support .equals()
+                List<WrappedBiomeEntry> entries = Lists.transform(Lists.newArrayList(BiomeManager.getBiomes(type)), WRAP_BIOME_ENTRIES);
+                // Custom types may have been added, we only want the vanilla ones
+                final List<WrappedBiomeEntry> vanillaEntries = type.ordinal() < vanillaBiomes.length ? Lists.transform(vanillaBiomes[type.ordinal()], WRAP_BIOME_ENTRIES) : (List)Lists.newArrayList();
+                
+                //Remove all default biomes from the entries list
+                entries.removeAll(vanillaEntries);
+                
+                for (WrappedBiomeEntry wrappedEntry : entries)
+                {
+                    remapBiomeToBoP(wrappedEntry.biomeEntry.biome, type, wrappedEntry.biomeEntry.itemWeight);
+                }
+            }
+        } 
+        catch (Exception e) 
+        {
+            BiomesOPlenty.logger.error("An error has occurred whilst copying mod biomes");
+            e.printStackTrace();
+            return;
+        }
+    }
+    
+    //TODO: Make this more accurate, possibly analyze heights, temps, rainfall and/or biome dictionary tags
+    private static void remapBiomeToBoP(BiomeGenBase biome, BiomeType type, int weight)
+    {
+        for (BOPClimates climate : BOPClimates.values())
+        {
+            if (climate.biomeType == type)
+            {
+                climate.addLandBiome(weight, biome);
+            }
+        }
+    }
+    
+    public static final Function<BiomeEntry, WrappedBiomeEntry> WRAP_BIOME_ENTRIES = new Function<BiomeEntry, WrappedBiomeEntry>()
+    {
+        @Override
+        public WrappedBiomeEntry apply(BiomeEntry input) 
+        {
+            return new WrappedBiomeEntry(input);
+        } 
+    };
+    
+    /**
+     * Provides working equals functionality for BiomeEntries
+     * */
+    private static class WrappedBiomeEntry
+    {
+        private BiomeEntry biomeEntry;
+        
+        private WrappedBiomeEntry(BiomeEntry biomeEntry)
+        {
+            this.biomeEntry = biomeEntry;   
+        }
+        
+        @Override
+        public boolean equals(Object input)
+        {
+            if (input == null) return false;
+            if (input == this) return true;
+            if (!(input instanceof WrappedBiomeEntry)) return false;
+            
+            WrappedBiomeEntry other = (WrappedBiomeEntry)input;
+            
+            return other.biomeEntry.itemWeight == this.biomeEntry.itemWeight && other.biomeEntry.biome.biomeID == this.biomeEntry.biome.biomeID;
+        }
     }
 }