org.refcodes.collection

Interface Keys<K,V>

Type Parameters:

K - The type of the key.

V - The type of the value which relates to a key.

All Known Subinterfaces:

Dictionary<K,V>, Dictionary.ClearableDictionary<K,V>, Dictionary.MutableDictionary<K,V>, Keys.ClearableKeys<K,V>, Keys.MutableKeys<K,V>, Properties, Properties.ClearableProperties, Properties.MutableProperties, Properties.PropertiesBuilder

All Known Implementing Classes:

PropertiesImpl, PropertiesImpl.MutablePropertiesImpl, PropertiesImpl.PropertiesBuilderImpl

public interface Keys<K,V>

This interface provides functionality for working with keys.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Keys.ClearableKeys<K,V> Extends the Keys interface with Clearable functionality (as of Clearable.clear()).
static interface	Keys.MutableKeys<K,V> Adds mutable functionality to the Keys interface.

Method Summary

Modifier and Type	Method and Description
boolean	containsKey(K aKey) Tests whether there is an element with the given key.
V	get(K aKey) Retrieves the element assigned to the given key.
Set<K>	keySet() Retrieves a collection containing all the keys found in the elements of this collection.
Collection<V>	values() Returns a Collection view of the values related to the contained keys.

Method Detail

containsKey

boolean containsKey(K aKey)

Tests whether there is an element with the given key.

Parameters:

aKey - The key for which to test whether there is an element.

Returns:

True in case there is an element for the given key.

get

V get(K aKey)

Retrieves the element assigned to the given key.

Parameters:

aKey - The key for which to get the element.

Returns:

The column in question or null if there is none such column.

keySet

Set<K> keySet()

Retrieves a collection containing all the keys found in the elements of this collection.

Returns:

A collection with key objects being the keys of all elements in this collection.

values

Collection<V> values()

Returns a Collection view of the values related to the contained keys.

Returns:

A Collection view of the values related to the contained keys.