101companies

Headline

IDE Creation with an XText- and Eclipse-based DSL editor

Motivation

Based on an Xtext grammar, model code and a corresponding DSL editor is generated, with which companies can be edited and operations for totaling and cutting salaries can be invoked. Textual syntax is described by the EBNF dialect of Xtext. Technology:Ecore is used for the representation of models where the Technology:Ecore model is derived from the EBNF. The generated parser maps textual syntax to EObjects. Hence, this can be seen as a Text to Model transformation. The parser is ANTLR-based. The implementation hence also relates to Technology:EMF-based implementations such as Contribution:emf as well as ANTLR-based implementations such as Contribution:antlrParser.

Architecture

Usage

A Eclipse version with an installed xtext plugin is needed to execute the transformations (e.g. the the EMF version with the installed xtext Framework).

Steps:

  • The contribution should be imported into Eclipse (it will contain 3 Eclipse plugins)
  • io.iocompanies.lang.ioi will provide a file called GenerateIOI.mwe2, which is under src/org.ioicompanies.lang
  • Executing this file (by right clicking and then selecting "Run As" -> "MWE2 workflow") will result in the generation of a metamodel and the the editor
  • Then the runtime workbench can be started by right clicking on "org.ioicompanies.lang.ioi" and selecting "Run As" -> "Eclipse Application".
The project will also provide a sample company. This file is called text.ioi and can be found in org.ioicompanies.lang.ioi. To use it, first a new project needs to be created ("File" -> "New" -> "Other" and then under "General" select "Project"). Then, copy the file into this newly created project and double click on it. Eclipse will ask if you want to add the XText nature to your project, which you should do. The file can then be edited with full auto completion support.

Comments:

  • You might need to refresh the Project Explorer in Eclipse (right click and then select "Refresh")

Issues

  • Usage information missing
  • Architecture information somewhat sparse
  • The information markers indicating the total salary per department are not correctly updated when updating salaries manually.
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