accord-maelstrom/src/main/java/accord/maelstrom/MaelstromUpdate.java

package accord.maelstrom;

import java.util.Map;
import java.util.TreeMap;

import accord.api.Key;
import accord.api.Data;
import accord.api.Update;

public class MaelstromUpdate extends TreeMap<Key, Value> implements Update
{
    @Override
    public MaelstromWrite apply(Data read)
    {
        MaelstromWrite write = new MaelstromWrite();
        Map<Key, Value> data = (MaelstromData)read;
        for (Map.Entry<Key, Value> e : entrySet())
            write.put(e.getKey(), data.get(e.getKey()).append(e.getValue()));
        return write;
    }
}