Very new to hibernate and interested in using it. Does hibernate support mapping an object where the data is not stored in individual fields but rather are stored in a Map.

As an example, consider the class Foo

public class Foo {

private Map _map = new Hashtable();

public Serializable getValue(Object key) {
return (Serializable)_map.get(key);
}

public void setValue(Object key, Serializable value) {
_map.put(key,value);
}
}

Foo is then mapped to a table in the database and the columns in the database need to get mapped to keys within the Map.

Is this possible? If so, can you show me where this is covered?

Regards

Eric

Yes. It is possible. Check the section on Dynamic Components.

crkrishna29

I checked out Dynamic Components. There isn't a lot said in the documentation that I can tell. Before I rack my brain, it appears based upon what I saw that the keys in the map are Strings? Is this true? How would I specify some other object?

Regards

Never mind. After skimming through documentation, it looks like the answer to most questions I could possibly ask at this point is...yes. :)

Yes you can store a Map, but the value cannot be a list of objects, it has to be a single object.

Hello everybody, I´m trying to complete a task using some of it. I´ve two classes: Emp and Func.

in Emp.hbm.xml:



My Emp.java has something like this:



When I perform a test using this, I´ve to do:



I don´t want to set the func in emp, I don´t know how to resolve it. Can anyone help?

Thanks for all.