react4j

Class Contexts

java.lang.Object

react4j.Contexts

public final class Contexts
extends java.lang.Object

A global registry containing the react contexts that have been created. A react context is expected to be registered with a java type and an optional qualifier. This allows multiple contexts of the same type to be present in the global registry.

Method Summary

Modifier and Type	Method and Description
static <T> Context<T>	get(java.lang.Class<T> type) Return the context with the specified type and an empty "" qualifier.
static <T> Context<T>	get(java.lang.Class<T> type, java.lang.String qualifier) Return the context with the specified type and qualifier.
static <T> void	register(java.lang.Class<T> type) Register the context with the specified type, an empty "" qualifier and a null default value.
static <T> void	register(java.lang.Class<T> type, java.lang.String qualifier) Register the context with the specified type, qualifier and a null default value.
static <T> void	register(java.lang.Class<T> type, java.lang.String qualifier, T defaultValue) Register the context with the specified type, qualifier and a default value.
static <T> void	register(java.lang.Class<T> type, T defaultValue) Register the context with the specified type, an empty "" qualifier and a default value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

register

public static <T> void register(@Nonnull
                                java.lang.Class<T> type)

Register the context with the specified type, an empty "" qualifier and a null default value. A context with matching type and qualifier parameters must not have been already registered.

Type Parameters:

T - the type of the context value.

Parameters:

type - the type of the context value.

See Also:

register(Class, String, Object)

register

public static <T> void register(@Nonnull
                                java.lang.Class<T> type,
                                @Nullable
                                T defaultValue)

Register the context with the specified type, an empty "" qualifier and a default value. A context with matching type and qualifier parameters must not have been already registered.

Type Parameters:

T - the type of the context value.

Parameters:

type - the type of the context value.

defaultValue - the default value to return if no provider has been specified higher in the tree.

See Also:

register(Class, String, Object)

register

public static <T> void register(@Nonnull
                                java.lang.Class<T> type,
                                @Nonnull
                                java.lang.String qualifier)

Register the context with the specified type, qualifier and a null default value. A context with matching type and qualifier parameters must not have been already registered.

Type Parameters:

T - the type of the context value.

Parameters:

type - the type of the context value.

qualifier - the qualifier to distinguish multiple instances of the the same type.

See Also:

register(Class, String, Object)

register

public static <T> void register(@Nonnull
                                java.lang.Class<T> type,
                                @Nonnull
                                java.lang.String qualifier,
                                @Nullable
                                T defaultValue)

Register the context with the specified type, qualifier and a default value. A context with matching type and qualifier parameters must not have been already registered.

Type Parameters:

T - the type of the context value.

Parameters:

type - the type of the context value.

qualifier - the qualifier to distinguish multiple instances of the the same type.

defaultValue - the default value to return if no provider has been specified higher in the tree.

get

public static <T> Context<T> get(@Nonnull
                                 java.lang.Class<T> type)

Return the context with the specified type and an empty "" qualifier. A context with matching type and qualifier parameters must have already been registered.

Type Parameters:

T - the type of the context value.

Parameters:

type - the type of the context value.

Returns:

the context.

See Also:

get(Class, String)

get

public static <T> Context<T> get(@Nonnull
                                 java.lang.Class<T> type,
                                 @Nonnull
                                 java.lang.String qualifier)

Return the context with the specified type and qualifier. A context with matching type and qualifier parameters must have already been registered.

Type Parameters:

T - the type of the context value.

Parameters:

type - the type of the context value.

qualifier - the qualifier to distinguish multiple instances of the the same type.

Returns:

the context.

See Also:

get(Class)