ReadOnlyStore (Providence Utils : Storage 1.7.1 API)

Type Parameters:

K - Key to use for gathering information.

V - Value to fetch, that is a generic method.

All Known Subinterfaces:

MessageListReadOnlyStore<K,M,F>, MessageListStore<K,M,F>, MessageReadOnlyStore<K,M,F>, MessageStore<K,M,F>, ReadWriteStore<K,V>

All Known Implementing Classes:

DirectoryMessageListStore, DirectoryMessageStore, InMemoryMessageListStore, InMemoryMessageStore
```
public interface ReadOnlyStore<K,V>
```
Interface to read a value or a range of values for a given key or keys.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`boolean`	`containsKey(K key)`
`default V`	`get(K key)`	Get a single value from the storage.
`java.util.Map<K,V>`	`getAll(java.util.Collection<K> keys)`	Look up a set of keys from the storage.
`java.util.Collection<K>`	`keys()`	Get a collection of all the keys in the store.

- Method Detail
  - getAll
```
@Nonnull
java.util.Map<K,V> getAll(@Nonnull
                          java.util.Collection<K> keys)
```
    Look up a set of keys from the storage.
    
    Parameters:
    
    keys - The keys to look up.
    
    Returns:
    
    Map of all the found key value pairs. Values not found should not have an entry in the result map (no key -> null mapping).
  - containsKey
```
boolean containsKey(@Nonnull
                    K key)
```
    Parameters:
    
    key - The key to look up.
    
    Returns:
    
    True if the key was contained in the map.
  - keys
```
@Nonnull
java.util.Collection<K> keys()
```
    Get a collection of all the keys in the store.
    
    Returns:
    
    Key collection.
  - get
```
@Nullable
default V get(@Nonnull
              K key)
```
    Get a single value from the storage.
    
    Parameters:
    
    key - The key to look up.
    
    Returns:
    
    The value if present.