Aspectual Component Implementation Examples

ComponentPackage Component Participant expectedOp() Op(){expectedOp(); getHost()} getHost() ConnectorPackage HostPackage Host // to play role of participant toModify(){} // to be mapped to Op() Johan’s solution 1 based on Mira’s inner class solution. Modification interface is represented also by abstract class, not by Method argument as proposed by Mira. “ outer.super.toModify()” simulated with aux() is not elegant MyHost toModify(){part.Op();}// override aux(){super.toModify()} part ParticipantAnonymousExtended expectedOp(){aux()} getHost(){MyHost.this} main(){new MyHost().toModify() }

ComponentPackage Component Participant expectedOp() Op(){expectedOp(); getHost()} getHost() ConnectorPackage MyHost toModify(){part.Op();} aux(){super.toModify()} part HostPackage ParticipantAnonymousExtended expectedOp(){aux()} getHost(){MyHost.this} main(){new MyHost().toModify() } Host toModify(){} Does it work with multiple participants? With multiple hosts? Looks like. Problem: when we have a Host-object and want to get modified behavior, need to create a MyHost object.

ComponentPackage Component Participant expectedOp() Op(){expectedOp ??? (); getHost()} getHost() ConnectorPackage More complex connector: one host but multiple methods are modified. Which expectedOp should be called in the participant? Is this why Mira’s implementation is more complex? part2 ParticipantAnonymousExtended expectedOp2(){aux2()} getHost(){MyHost.this} main(){new MyHost().toModify2() } toModify2(){part2.Op();}//override aux2(){super.toModify2()} ParticipantAnonymousExtended expectedOp1(){aux1()} getHost(){MyHost.this} main(){new MyHost().toModify1() } MyHost toModify1(){part1.Op();}//overrride aux1(){super.toModify1()} part1

ComponentPackage Component Participant rOp(Method expOp) {expOp.invoke(); getHost();} getHost(); ConnectorPackage HostPackage Host // to play role of participant toModify(){} // to be mapped to rOp() Mira’s modified inner class solution. MyHost toModify(){part.rOp(“toModify”);} part ParticipantAnonymousExtended getHost(){MyHost.this} main(){new MyHost().toModify() }

Implementations Implement Datastructure/Counter/Lock example without reflection with reflection apply to both Queue and Stack Implement ShowRWAccess example: simulate inheritance between components and connectors in Java without reflection with reflection map readOp to two methods of two different application classes

Implement Datastructure/Counter/Lock example

without reflection

with reflection

apply to both Queue and Stack

Implement ShowRWAccess example: simulate inheritance between components and connectors in Java

without reflection

with reflection

map readOp to two methods of two different application classes