Epsilon Generation Language
EGL is a template-based model-to-text language for generating code, documentation and other textual artefacts from models. EGL supports content-destination decoupling, protected regions for mixing generated with hand-written code, and template coordination
Features
- Decouple content from destination (can be used to generate text to files, to the clipboard, or as a server-side scripting language etc.)
- Call templates (with parameters) from other templates
- Define and call sub-templates
- Mix generated with hand-written code
Features inherited from EOL
- Support for simultaneously accessing/modifying many models of (potentially) different metamodels
- All the usual programming constructs (while and for loops, statement sequencing, variables etc.)
- Support for those convenient first-order logic OCL operations (select, reject, collect etc.)
- Ability to create and call methods of Java objects
- Support for dynamically attaching operations to existing meta-classes and types at runtime
- Support for cached operations
- Support for extended properties
- Support for user interaction
- Ability to create reusable libraries of operations and import them from different Epsilon (not only EOL) modules
Examples and Screencasts
- Tutorial: Using EGL as a server-side scripting language in Tomcat
- Example: Generate HTML from an Ecore metamodel
- Screencast: Generating an HTML report (part 1, part 2)