PreferencesInfo (GateIn - Portlet Container (api) 6.3.0-RC05 API)

```
public interface PreferencesInfo
```
Since:

2.4

Version:

$Revision: 5448 $

Author:

Julien Viet

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Set<String>`	`getKeys()`	Return the immutable set of keys.
`PreferenceInfo`	`getPreference(String key)`	A preference specified by its key.

- Method Detail
  - getKeys
```
Set<String> getKeys()
```
    Return the immutable set of keys.
    
    Returns:
    
    the keys
  - getPreference
```
PreferenceInfo getPreference(String key)
                      throws IllegalArgumentException
```
    A preference specified by its key.
    
    Parameters:
    
    key - the key
    
    Returns:
    
    the preference info or null if it does not exist
    
    Throws:
    
    IllegalArgumentException - if the key is null