voldemort.store.views
Interface View<K,V,S,T>

Type Parameters:

K - The type of the key

V - The type of things in the view

S - The type of things in the store

T - The type of transform

All Known Implementing Classes:

AbstractViewTransformation

@Experimental
public interface View<K,V,S,T>

The interface for defining a view. This interface provides a translation from the view's type to the target store's type and vice versa. If one direction is not supported, the unimplemented method should throw an UnsupportedViewOperationException.

Method Summary

V	storeToView(Store<K,S,T> targetStore, K k, S s, T t) Translate from the store type to the view type
S	viewToStore(Store<K,S,T> targetStore, K k, V v, T t) Translate from the view type to the store type

Method Detail

storeToView

V storeToView(Store<K,S,T> targetStore,
              K k,
              S s,
              T t)
              throws UnsupportedViewOperationException

Translate from the store type to the view type

Parameters:

targetStore - The store behind the view

k - The key

s - The value for the store

t - the transforms to be applied on s

Returns:

The value for the view

Throws:

UnsupportedViewOperationException - If this direction of translation is not allowed

viewToStore

S viewToStore(Store<K,S,T> targetStore,
              K k,
              V v,
              T t)
              throws UnsupportedViewOperationException

Translate from the view type to the store type

Parameters:

targetStore - The store behind the view

k - The key

v - The value

t - the transforms to be applied on v

Returns:

The store type

Throws:

UnsupportedViewOperationException - If this direction of translation is not allowed