Add easy access to information in an Event occurrence

[gbasso]

For example, a function to compare the sender of the event and the receiver:

on MyEvent [ occurrence.source.isMe(this.ID) ]

or an access to the space where the event is emit:

on MyEvent [ occurrence.space == this.defaultSpace ] // the ID or the space ?

[gallandarakhneorg]

The following functions could be added:

• Agent::isFromMe(Event event)
• Agent::isMe(UUID agentID)
• Agent::isMe(Address agentAddress)
• Event::isFrom(Address agentAddress)
• Event::isFrom(UUID agentID)
• DefaultContextInteractions::isDefaultSpace(Space space)
• DefaultContextInteractions::isDefaultSpace(UUID spaceID)
• DefaultContextInteractions::isInDefaultSpace(Event event)
• DefaultContextInteractions::isDefaultContext(AgentContext context)
• DefaultContextInteractions::isDefaultContext(UUID contextID)
• InnerContextInteractions::isInnerDefaultSpace(Space space)
• InnerContextInteractions::isInnerDefaultSpace(UUID spaceID)
• InnerContextInteractions::isInInnerDefaultSpace(Event event)
• ExternalContextInteractions::isInSpace(Event event, Space space)
• ExternalContextInteractions::isInSpace(Event event, UUID contextID, UUID spaceID)
• ExternalContextInteractions::isInDefaultSpace(Event event, UUID spaceID)

Note that all these functions may benefit of the extension method syntax.

[gallandarakhneorg]

The Agent's functions are added in the commit 37f7eff.