CO7214CW2 SOA: Service-oriented Architectures Assessment and Tutor Proposal

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CO7214CW2 SOA: Service-oriented Architectures

Assessment No: 1

CO7214CW2|SOA: Service-oriented Architectures

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CO7214CW2 SOA: Service-oriented Architectures

SOA: Service-oriented Architectures


Task

Coursework 2: From UML to XML and JSON

This model describes the data held by a module registration system. Programmes (such as Advanced Computer Science) have modules to which students enrolled on these pro- grammes can be registered.

Assignment

The problems in Part A, B and C are independent of each other. While they use some of the same class models and requirements, they are concerned with different operations, scenar- ios and target languages. Therefore, your design choices to A, B and C can be different, too.

Part A: JSON – based on Part 2.5

Create a sample JSON object that could be returned as a result of invoking getModuleRegistrations (12345678) as specified above, in the following steps:

  • Create a reduced class diagram containing only the elements relevant to this task.
  • Create a class diagram defining the structure you want to use to represent the data in JSON. This is analogous to an XML-specific class diagram, except that the target language is JSON. What is the structure of the mapping you have to use?
  • Create the JSON object following the structure of your JSON-specific class diagram.
Part B: XML – based on Part 2.1 - 4

Design a DTD that could support the data returned by an invocation of getAllRegistra- tionsForProgramme(“Advanced Computer Science”) as specified above, following the steps below. Take care to create a solution that minimises redundancy to ensure a compact representation of the data.

  • Create a reduced class diagram containing only the elements relevant to this task. Justify your choices.
  • Create an XML-specific class diagram and justify the chosen document structure using the requirements from the scenario.
  • Derive the DTD and justify the style of mapping you have chosen for the attributes.
  • Is the mapping from the class diagram in 5 to the DTD data preserving? Please justify your answer. In particular
  • If the mapping does not extend data capacity, provide a valid object diagram as counterexample and explain why there is no corresponding valid XML in- stance. b. If the mapping does not reflect data capacity, provide a valid XML instance as counterexample and explain why there is no corresponding valid object dia- gram.
Part C: Data Integration – based on Part 3.2

The class diagram below defines the data held by a timetabling system, allocating sessions for modules held during a certain term, at certain times of the week, in certain rooms. A personal timetable allocates to each student the timetabled sessions for the modules they are registered in. To create such a personal timetable we need to integrate the data models of the timetabling system and the module registration system.

The integration should satisfy the following requirements:

  • All data representable with the two given models should also be covered by the inte- grated model, i.e., both mappings from the given models to the integrated model should extend the data capacity.
  • The integrated model should be free of redundancy in the sense that every concept should only be represented once.
  • The integrated model should be able to represent consistent individual timetables across several terms of up to five academic years.

Proceed along the following steps:

  1. Identify the conceptual overlaps and conflicts between the two models in an itemised list.
  2. For each overlap or conflict you identified, explain it in a single sentence and say how you chose to resolve it in the integrated model.
  3. Create an integrated class diagram following the choices made under 9.

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CO7214CW2 SOA: Service-oriented Architectures