BiomesOPlenty/src/minecraft/biomesoplenty/helpers/BiomeCacheBOPhell.java

package biomesoplenty.helpers;

import java.util.ArrayList;
import java.util.List;

import net.minecraft.util.LongHashMap;
import net.minecraft.world.biome.BiomeGenBase;
import biomesoplenty.world.WorldChunkManagerBOPhell;

public class BiomeCacheBOPhell
{
    private final WorldChunkManagerBOPhell chunkManager;
    private long lastCleanupTime = 0L;
    private LongHashMap cacheMap = new LongHashMap();
    
    @SuppressWarnings("rawtypes")
	private List cache = new ArrayList();

    public BiomeCacheBOPhell(WorldChunkManagerBOPhell par1WorldChunkManager)
    {
        this.chunkManager = par1WorldChunkManager;
    }

    @SuppressWarnings("unchecked")
	public BiomeCacheBlockBOPhell getBiomeCacheBlock(int par1, int par2)
    {
        par1 >>= 4;
        par2 >>= 4;
        long var3 = (long)par1 & 4294967295L | ((long)par2 & 4294967295L) << 32;
        BiomeCacheBlockBOPhell var5 = (BiomeCacheBlockBOPhell)this.cacheMap.getValueByKey(var3);

        if (var5 == null)
        {
            var5 = new BiomeCacheBlockBOPhell(this, par1, par2);
            this.cacheMap.add(var3, var5);
            this.cache.add(var5);
        }

        var5.lastAccessTime = System.currentTimeMillis();
        return var5;
    }

    public BiomeGenBase getBiomeGenAt(int par1, int par2)
    {
        return this.getBiomeCacheBlock(par1, par2).getBiomeGenAt(par1, par2);
    }

    public void cleanupCache()
    {
        long var1 = System.currentTimeMillis();
        long var3 = var1 - this.lastCleanupTime;

        if (var3 > 7500L || var3 < 0L)
        {
            this.lastCleanupTime = var1;

            for (int var5 = 0; var5 < this.cache.size(); ++var5)
            {
            	BiomeCacheBlockBOPhell var6 = (BiomeCacheBlockBOPhell)this.cache.get(var5);
                long var7 = var1 - var6.lastAccessTime;

                if (var7 > 30000L || var7 < 0L)
                {
                    this.cache.remove(var5--);
                    long var9 = (long)var6.xPosition & 4294967295L | ((long)var6.zPosition & 4294967295L) << 32;
                    this.cacheMap.remove(var9);
                }
            }
        }
    }

    public BiomeGenBase[] getCachedBiomes(int par1, int par2)
    {
        return this.getBiomeCacheBlock(par1, par2).biomes;
    }

    static WorldChunkManagerBOPhell getChunkManager(BiomeCacheBOPhell par0BiomeCache)
    {
        return par0BiomeCache.chunkManager;
    }
}