I have a Map, that I want to persist. The domain object is something like this:

public class Settings {
    private String key;
    private String value;

    public String getKey() { ... }
    public String getValue() { ... }
    public void setKey() { ... }
    public void setValue() { ... }
}

The standard approach is to generate a Setting for each pair, and saveOrUpdate() it. But it generates way too much queries, because I need to save lots of settings at a time, and it really affects perfomance. Is there a way to do this using one update query?