com.hammurapi.common

Interface Context

All Known Subinterfaces:

ExecutionContext<KP>, MutableContext

All Known Implementing Classes:

CompositeContext, DefaultContext, FacadeContext, SimpleMutableContext, SingletonChainingContext

public interface Context

Execution context.

Field Summary

Fields

Modifier and Type	Field and Description
static Context	INSTANCE Context constructed from all available context services.

Method Summary

Methods

Modifier and Type	Method and Description
<T> T	lookup(Class<T> serviceClass, Predicate<T,Context>... selectors) Looks up single object (service) by type.
Object	lookup(String name) Looks up object by name.
<T> Iterator<T>	lookupAll(Class<T> serviceClass, Predicate<T,Context>... selectors) Looks up all services of given type.

Field Detail

INSTANCE

static final Context INSTANCE

Context constructed from all available context services.

Method Detail

lookup

Object lookup(String name)

Looks up object by name.

Parameters:

name - Object name.

Returns:

named object or null.

lookup

<T> T lookup(Class<T> serviceClass,
           Predicate<T,Context>... selectors)

Looks up single object (service) by type.

Type Parameters:

T - Service type.

Parameters:

serviceClass - Requested service type.

selectors - Optional service selectors. If more than one, selectors are combined with AND.

Returns:

Service instance or null.

lookupAll

<T> Iterator<T> lookupAll(Class<T> serviceClass,
                        Predicate<T,Context>... selectors)

Looks up all services of given type.

Type Parameters:

T - Service type.

Parameters:

serviceClass - Requested service type.

selectors - Optional service selectors. If more than one, selectors are combined with AND.

Returns:

Iterator over services of requested type.