Model-to-text transformation

As a warm-up exercise, modify this M2T transformation in Epsilon’s online playground so that it generates a table with task names as column headers and person names as row headers, as shown below.

Problem

While the callcentre2java model-to-text transformation discussed in the M2T lecture works fine for models that end with call redirections, it crashes for models that end with statements.

Preparation

• Clone this Github repository
  • Alternatively, download a copy of its contents
• Run the Epsilon Eclipse distribution
• Import only the following projects from the repository/zip file
  • ac.uk.york.callcentre
  • ac.uk.york.callcentre.edit
  • ac.uk.york.callcentre.editor
  • ac.uk.york.callcentre.validation
  • ac.uk.york.callcentre.design
• Make sure that all imported projects are under the H: or C: drives
• You can double-check their location by right-clicking on them in Eclipse and selecting the Properties menu item
• Run a nested Eclipse instance by right-clicking on one of the projects above within Eclipse and selecting Run as -> Eclipse Application
• In the nested Eclipse instance import only the following projects from the repository/zip file
  • ac.uk.york.callcentre.m2t
  • acmebank.model
  • acmebank.application
• Run the callcentre2java.egx EGX M2T transformation against the acmebank.callcentre model so that it generates code under the acmebank.application project
  • Create a new EGL Generator run configuration (like you did for EOL and EVL in previous practicals)
  • Set its source to callcentre2java.egx
  • Set the Files should be generated in directory to the acmebank.application project
• Run the generated AcmeBank.java class
  • Optional: implement the validation logic for PINs as shown in the M2T lecture

Fix the M2T transformation

• Add a Thank you for calling Acme Bank statement to your model, and a transition to it as shown in the problem description
  • Don’t forget to give the new statement a name in the Properties view!
• Re-run the M2T transformation and notice how it crashes with a runtime exception (Called feature 'to' on undefined object)
• Exercise #1: Modify the source code of the M2T transformation to fix the problem

Extend the M2T transformation

• In the current version of the generated code, a user needs to enter the number of the transition they wish to take at decision points
  • e.g. 1 for yes, 2 for no in Are you an existing customer?
• Exercise #2: Modify the M2T transformation so that the code produced accepts both the number and the text of the transition
  • e.g. 1 or "yes" for yes, 2 or "no" for no in Are you an existing customer?

HTML generation

• So far, you have been modifying the existing callcentre2java.egx M2T transformation
• Exercise #3: write a new M2T transformation that transforms a call centre model into a set of HTML pages
  • One HTML page for each step
  • Hyperlinks in the generated pages to represent transitions

Solutions

Model solutions for the exercises are available in this ZIP file.