Paper/src/main/java/net/minecraft/server/WorldGenerator.java

package net.minecraft.server;

import java.util.Random;

import org.bukkit.BlockChangeDelegate; // CraftBukkit

public abstract class WorldGenerator {

    private final boolean a;

    public WorldGenerator() {
        this.a = false;
    }

    public WorldGenerator(boolean flag) {
        this.a = flag;
    }

    public abstract boolean a(World world, Random random, int i, int j, int k);

    public void a(double d0, double d1, double d2) {}

    // CraftBukkit - change signature
    protected void setTypeAndData(BlockChangeDelegate world, int i, int j, int k, int l, int i1) {
        if (this.a) {
            world.setTypeIdAndData(i, j, k, l, i1);
        // CraftBukkit start - do equiv of setTypeIdAndData, but skip doing physics to prevent fades
        }
        else if ((world instanceof World) && ((World) world).getChunkAt(i >> 4, k >> 4).sentToClient) {
            if (world.setRawTypeIdAndData(i, j, k, l, i1)) {
                ((World) world).notify(i, j, k);
            }
        // CraftBukkt end
        } else {
            world.setRawTypeIdAndData(i, j, k, l, i1);
        }
    }
}