AttributeResolver (GateIn - Portlet Container (api) 6.3.1-RC01 API)

All Known Implementing Classes:

AbstractSessionAttributeResolver, MapAttributeResolver, PrincipalAttributeResolver
```
public interface AttributeResolver<K,V>
```
An attribute resolver.

Version:

$Revision: 7228 $

Author:

Julien Viet

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`V`	`getAttribute(K attrKey)`	Return an attribute from this resolver.
`Set<K>`	`getKeys()`	Returns the set of keys of the attributes bound in that resolver.
`void`	`setAttribute(K attrKey, V attrValue)`	Update an attribute value on this resolve.

- Method Detail
  - getKeys
```
Set<K> getKeys()
```
    Returns the set of keys of the attributes bound in that resolver.
    
    Returns:
    
    a set of keys
  - getAttribute
```
V getAttribute(K attrKey)
        throws IllegalArgumentException
```
    Return an attribute from this resolver.
    
    Parameters:
    
    attrKey -
    
    Returns:
    
    the attribute value or null if it is not found
    
    Throws:
    
    IllegalArgumentException - if the attribute key is not valid
  - setAttribute
```
void setAttribute(K attrKey,
                  V attrValue)
           throws IllegalArgumentException
```
    Update an attribute value on this resolve. If the attribute value is null the resolver must treat the operation as a removal of the attribute.
    
    Parameters:
    
    attrKey -
    
    attrValue - the attribute value
    
    Throws:
    
    IllegalArgumentException - if the attribute key is not valid