A novel general event-condition-state pattern framework.pdf

A Novel General Event-Condition-State PatternFrameworkHongjun DiaoSchool of Computer Science and Technology, SoochowUniversitySuzhou, Chinahjdiao@Fei Zhu*School of Computer Science and Technology, SoochowUniversitySuzhou, Chinazhufei@* Corresponding author: Fei Zhu, zhufei@.Abstract—A novel event-condition-state pattern frameworkwhich is an event-based finite state machine is proposed. Theframework improves GoF state pattern by re-segments GoFContext into a class which is responsible for management and aclass which is responsible for operation interface. Complicatedrelations among event, condition and state are analyzed. Essentialcomponents for implementation, such as management, statetransferring, and event triggering mechanism, are also designedin the framework. With the pattern framework, much effort insoftware development will be relieved, thus simplifying the wholedevelopment work. Taking advantage of it, different versions of asame input method system which are respectively for WindowsMobile system and Symbian are the developed in intelligentmobile phone. The pattern framework simplifies developingeffort, and provides much convenience in later maintenance andupdate as well.Index Terms—patten design, event condition state, eventmapping, mobile developing, input methodI.INTRODUCTIONWith the popularity of design pattern, it is widely used insoftware development, such as Internet game, utility softwareand system software. For example, documents in office