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Chapter 4. The GOPPRR Meta Meta Model – An Extension of GOPRR more invariants for a GOPPRR project, the context would be CProject. To select this context, the following OCL statement is used: context CProject An invariant construct within a certain context is prefixed by an inv: statement followed by the invariant expression itself. This expression follows in part the C++ syntax for accessing methods and attributes of objects [79]. For clarification, the following OCL statement defines that all GOPPRR project objects must have a non empty ID: context CProject inv : m_ID ’ ’ The following examples are used to clarify the usage of OCL for constraint definition, which are taken from the case study presented in Part III. 4.5.1. OCL Example: Global, Numerical Criteria The global occurrence of the graph type “EVCStateMachine” must be exact one: context CProject inv : m_GraphSet−>s e l e c t (m_Type = ’ EVCStateMachine ’ )−>s i z e ( ) = 1 4.5.2. OCL Example: Numerical Criteria within a Graph All objects of the type “EVCState” within any graph of type “EVCStateMachine” must have at least one explosion: context CProject inv : m_GraphSet−>s e l e c t (m_Type = ’ EVCStateMachine ’ )−>f o r A l l ( m_ObjectSet−>s e l e c t (m_Type = ’ EVCState ’ )−>f o r A l l ( m_Explosions−>s i z e ( ) >= 1) ) Combined with the prior constraint (Subsection 4.5.1), it can be reduced to: context CProject inv : m_GraphSet−>s e l e c t (m_Type = ’ EVCStateMachine ’ )−>s i z e ( ) = 1 inv : m_GraphSet−>any (m_Type = ’ EVCStateMachine ’ ) . m_ObjectSet−>s e l e c t (m_Type = ’ EVCState ’ )−>f o r A l l ( m_Explosions−>s i z e ( ) >= 1) An iteration (by the forAll() statement) over a set of multiple “EVCStateMachine” graphs is not required because the first invariant already requires exact one instance of it. For simplification, this reduction is done for all following constraint examples. 4.5.3. OCL Example: Boolean Criteria within a Graph by further Type Specification All “EVCGuard” properties of all “EVCTransition” relationships within all “EVCStateMachine” graphs must also exist in at least one explosion of the corresponding objects connected by the “CurrentEVCState” role of the before selected relationship: 48
4.5. The Object Constraint Language for Static Semantics context CProject inv : m_GraphSet−>s e l e c t (m_Type = ’ EVCStateMachine ’ )−>s i z e ( ) = 1 inv : m_GraphSet−>f o r A l l ( graph | graph . m_RelationshipSet−>s e l e c t (m_Type = ’ ModeTransition ’ )−>f o r A l l ( r e l a t i o n s h i p | graph . m_BindingSet−>e x i s t s ( m_Connection . m_pRole . m_Type = ’ CurrentState ’ and m_Connection . m_Calls−>e x i s t s ( m_pObject . m_Explosions−>e x i s t s ( e x p l o s i o n | e x p l o s i o n . m_ObjectSet−>e x i s t s ( r e l a t i o n s h i p . m_Properties−>any (m_Type = ’EVCGuard ’ ) . m_NonProperties−>any (m_Type = ’ ModeGuard ’ ) ) ) ) ) ) ) 4.5.4. OCL Example: Port Connection Specification For all graphs and for all ports, the amount of connected “DataInput” roles must be exact one: context CProject inv : m_GraphSet−>s e l e c t (m_Type = ’ EVCStateMachine ’ )−>s i z e ( ) = 1 inv : m_GraphSet−>f o r A l l ( graph | graph . m_PortSet−>f o r A l l ( port | graph . m_BindingSet−>s e l e c t ( m_Connection . m_Calls−>e x i s t s (m_pPort = port and m_pRole . m_Type = ’ DataInput ’ ) )−>s i z e ( ) = 1 ) ) 4.5.5. OCL Example: Graphical Containment In all “CommunicationIn” graphs, all “Packet” objects that are graphically contained by any “Telegram” object must exist also in the decomposition of the related “Telegram” object: context CProject inv : m_GraphSet−>s e l e c t (m_Type = ’ EVCStateMachine ’ )−>s i z e ( ) = 1 inv : m_GraphSet−>s e l e c t (m_Type = ’ CommunicationIn ’ )−>f o r A l l ( graph | graph . m_ObjectSet−>s e l e c t (m_Type = ’ Telegram ’ )−>f o r A l l ( telegram | graph . m_Containers−>any ( m_pContainer = telegram ) . m_ContainedObjects−>f o r A l l ( o b j e c t | telegram . m_pDecomposition . m_ObjectSet−>i n c l u d e s ( o b j e c t ) ) ) ) 49
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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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11 openETCS Simulation Generally, a
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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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FMetaEdit+ Generators F.1. GOPPRR X
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GopenETCS Unit Testing G.1. Unit Te
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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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