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09_Persistence
NatTable settings refer to the changes which the user makes to the grid while using it. The settings which are saved include but are not limited to the following:
- Hidden columns
- Column order
- Resized columns/rows
- Sorting state
- Column groups state
- Filter row state
The PersistentNatExample
is a good place to get started.
NatTable saves its state in a java.util.Properties
file as key/value pairs. The main method to note is the
NatTable.saveState(prefix, properties)
To save state, invoke this method and give it a properties file. This file will be populated with all the sate information. You can now save this file anywhere/anyway you wish. Prefix is any arbitrary string which will be prepended to all the key values in the property file.
The method to note is the
NatTable.loadState(String prefix, Properties properties)
The prefix and properties file are from the save state step.
The IPersistable
interface is the main interface to note. All the layers which save state, implement this interface. Additionally, you can register your own persistable with any layer using the registerPersistable()
on the ILayer
interface. Your persistable will be invoked when NatTable state is saved/loaded.