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Chapter 8. openETCS Domain Framework Figure 8.5.: Class diagram of the DMI classes able to inform any observer about a changed subject. On the other hand, each observer only holds a pointer to one CEVCStateMachine object that it observes. Via this m_pStateMachine aggregation, an observer can access the currently active CDMISubject object to read data from the EVC to the driver or set data entered in the observer by the driver. CDMIQWidget is a concrete observer implementation using the Qt 4 [59] framework. Qt 4 was chosen because it provides platform independent GUI development in the C++ programming language [79], which means in an object-oriented manner. This is required by Req.6 and Req.7. The concrete elements 6 for inputs and outputs are generated dynamically since those typically vary for different ETCS Modes or rather CEVCState instances. The input and output elements are stored in the m_OutputWidgets and m_InputWidgets compositions. For those, a pointer to the QWidget [59] class is used as data type. A QWidget is the very basic type of all classes in Qt 4 representing graphical elements. Which concrete, derived classes are used, depends on the CDMIInput and CDMIOuput objects in the current CDMISubject. Since this is of low relevance, those certain types will be not discussed here. The CDMIQWidget observer class itself is also a QWidget, which mainly has the advantage that it can be used as standalone dialogue but also can be integrated or combined with other Qt 4 elements if required. The inputs and outputs of the subject are aligned in a grid respectively in two columns: Outputs on the left side, inputs on the right side. The corresponding graphical arrangement is provided by the m_Layout composition to the QGridLayout [59] class. For the graphical definition of the meaning of each input or output element in CDMIQWidget, labels are used, which are located on the left side of each graphical element. Those correspond to the m_Labels composition to 6 widgets in terms of Qt 132
8.4. Behavioural Design the QLabel [59] class. Furthermore, each input device has a QPushButton [59] element to ensure that the driver can first enter or modify data in the widget and then can activate it by a single click on the button. Those buttons are stored in the m_InputButtons aggregation. 8.3.3. Language Details Figure 8.6 sketches only the classes and relevant associations that are related to the ETCS language in a UML class diagram. CLanguage is the base class for all other already introduced Figure 8.6.: Class diagram of the language classes language classes. Since a telegram or rather a CTelegram object can be used for several CBaliseDeviceIn and CBaliseDeviceOut instances, those are CEVCStateMachine global indicated by the m_Language composition. This association should hold all available instances of CTelegram, CPacket, and CVariable because CPacket and CVariable objects can also be reused for different CTelegram instances and CVariable objects for CPacket instances. The bit data flows between oVariableStorage and oVariableStorage objects in oCommunicationReader and oCommunicationSender graphs in the openETCS model 7 are, like in function blocks, mapped to CBitFlow instances. Hence, CVariable has a aggregation m_BitValues to CBitFlow in Figure 8.6. 8.4. Behavioural Design In contrast to the previous Section 8.3 about the structural design of the openETCS domain framework, this section describes its behavioural design. The main difference between the structural and the behavioural design is that the structural design is constant and cannot be 7 instance of the openETCS meta model 133
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Open Source Software for Train Cont
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Datum des Promotionskolloquiums: 21
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Acknowledgments I would like to tha
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Abstract This document describes th
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Contents 3.3.3. Rascal . . . . . .
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Contents 8.4. Behavioural Design .
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Contents D.3. Domain Framework Mode
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List of Figures 6.4. Simple CORBA u
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List of Figures 10.27. General read
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Chapter 1. Introduction Railway Con
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Chapter 1. Introduction MontiCore M
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Chapter 1. Introduction ERTMS Forma
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Part I. Background 9
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Chapter 2. Concepts for Safe Railwa
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Chapter 3. Domain-Specific Modellin
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4The GOPPRR Meta Meta Model - An Ex
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4.1. Concrete Syntax Description Fo
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4.2. GOPPRR C++ Abstract Syntax Mod
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4.2. GOPPRR C++ Abstract Syntax Mod
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4.5. The Object Constraint Language
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4.5. The Object Constraint Language
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4.6. Tool Chain where artefacts are
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4.7. Conclusion External Artefacts
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Part II. Dependability 55
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Chapter 5. Verification and Validat
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6Security in Open Source Software A
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6.1. Memory Management Open Meta Me
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6.2. Hardware Virtualisation a fixe
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6.2. Hardware Virtualisation in a v
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6.2. Hardware Virtualisation Again,
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6.2. Hardware Virtualisation the fa
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Part III. openETCS Case Study 77
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Chapter 7. openETCS Meta Model far
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Chapter 10. openETCS Model c1 c8 c1
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Chapter 10. openETCS Model Applicat
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Chapter 10. openETCS Model c1 c25 c
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Chapter 10. openETCS Model Initiali
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Chapter 10. openETCS Model Reverse
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Chapter 10. openETCS Model 0 (CONST
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Chapter 10. openETCS Model Current
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Chapter 10. openETCS Model c7 bool
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Chapter 10. openETCS Model Current
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Chapter 10. openETCS Model The purp
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Chapter 10. openETCS Model 10.3.3.
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Chapter 10. openETCS Model be expla
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Chapter 10. openETCS Model 10.4.4.
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11 openETCS Simulation Generally, a
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11.2. Platform Specific Model for t
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11.3. Simulation Model Figure 11.6.
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11.3. Simulation Model 11.3.2. CDMI
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11.3. Simulation Model sets the Boo
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11.3. Simulation Model Entering_Dri
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11.3. Simulation Model The states o
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11.3. Simulation Model Figure 11.13
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11.6. Conclusion about warnings, fa
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Chapter 12. Conclusion and Outlook
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Part IV. Appendix 241
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Appendix A. GOPPRR to MOF Transform
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Appendix B. openETCS Meta Model Con
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DopenETCS Domain Framework D.1. Dom
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D.2. Domain Framework Source Code 8
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D.3. Domain Framework Model 32 m_pT
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Appendix E. openETCS Generator 39 <
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Appendix E. openETCS Generator 200
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Appendix E. openETCS Generator 46 4
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FMetaEdit+ Generators F.1. GOPPRR X
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GopenETCS Unit Testing G.1. Unit Te
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Appendix H. openETCS Simulation 14
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Glossary ANTLR ANother Tool for Lan
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Glossary EVC An European Vital Comp
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Glossary OEM An original equipment
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Glossary XML The Extensible Markup
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Bibliography [12] “EN 50128 - Rai
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Bibliography [39] ——, ““Ope
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Bibliography [69] T. J. Parr and R.
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Index Artefact, 51 Automatic train
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Index Linux, 149 Memory management,
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