io.neba.core.resourcemodels.mapping

Class CyclicMappingSupport

java.lang.Object

io.neba.core.resourcemodels.mapping.CyclicMappingSupport

@Service
public class CyclicMappingSupport
extends Object

Provides thread-local tracking of mapping invocations in order to support cycles in mappings and gather statistical data regarding mapping depths of resource models.

Author:

Olaf Otto

Constructor Summary

Constructors

Constructor and Description
CyclicMappingSupport()

Method Summary

Methods

Modifier and Type	Method and Description
<T> Mapping<T>	begin(Mapping<T> mapping) Contract: When invoked and null is returned, one must invoke end(Mapping) after the corresponding mapping was executed. Otherwise, a leak in the form of persisting thread-local attributes is introduced.
void	end(Mapping mapping) Ends a mapping that was begun.
Set<Mapping>	getOngoingMappings()

Methods inherited from class java.lang.Object

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

Constructor Detail

CyclicMappingSupport

public CyclicMappingSupport()

Method Detail

begin

public <T> Mapping<T> begin(Mapping<T> mapping)

Contract: When invoked and null is returned, one must invoke end(Mapping) after the corresponding mapping was executed.
Otherwise, a leak in the form of persisting thread-local attributes is introduced.

Parameters:

mapping - must not be null.

Returns:

The already ongoing mapping, or null if the given mapping has not occurred yet. The provided mapping must only be executed if this emthod returns null. Otherwise, the execution results in an infinite loop.

end

public void end(Mapping mapping)

Ends a mapping that was begun.

Parameters:

mapping - must not be null.

getOngoingMappings

public Set<Mapping> getOngoingMappings()