How to fill chunks with flowing water

I'm using

import org.bukkit.Material;
import org.bukkit.generator.ChunkGenerator.ChunkData;

ChunkData chunkData = ...
chunkData.setBlock(x, y, z, Material.WATER);

to fill chunks with water blocks. But these blocks of water do not begin to flow when they are surrounded by air.

How to create flowing water?

Thanks!

 

What function do I have to use to update the block?

Do you mean the BlockState.update() function?

I can't get BlockState from ChunkData, only Material, MaterialData and BlockData.

Do I have to catch an event to update the block?

 

@ixilon
If you are not familiar with ChunkData I would rather than use a BlockList.

• Create a cube with two corner points. (There is a very nice class to use: Cuboid. https://www.spigotmc.org/threads/region-cuboid.329859/)
• With the method getBlocks() you get the BlockList returned.
• Then loop through this BlockList and set every Material type of every block to water.