README.md

EventDSL

Writing event and command classes is extremely tedious. Why not let the computer do the repetitive work so you can focus on the most important aspects of modeling?

Spec format

• Any line that starts with a word, such as SomeType is turned into a class.
• Properties may be declared by following the type name by a block: SomeType { s:FirstProperty s:SecondProperty }
• Property types are indicated with the prefixed letter, strings, ints, longs and DateTime are supported.
• Since strings are so common, a property without a type prefix is inferred to be a string.
• A type can 'extend' another type by following its name with a colon and the name of the parent type: SomeType : BaseType.
• Properties can be added to the extending type as well: SomeType : BaseType { i:YetAnotherProperty }
• All properties from the parent type are copied to the extending type, avoiding the use of class hierarchies or abstract classes.
• Any type that was extended is not represented in the output. These types should be regarded as templates for other types, not as types in their own right.
• Any line that starts with "NS:" is treated as the namespace to use for all following types.
• The namespace is applied until another NS: declaration is seen.
• All types outside an NS declaration are put in the Common namespace.

Output

The spec is turned into a C# file with basic indentation. All generated types are public, and all properties have both public getters and setters for easy serialization.

Example

Spec file:

Event { EventId CorrelationId i:Version dt:Time }
PageAdded : Event { Url }
LinkAdded : Event { Url }

C# output:

namespace Events.Common
{
	public class PageAdded : IEvent
	{
		public string EventId { get; set; }
		public string CorrelationId { get; set; }
		public int Version { get; set; }
		public DateTime Time { get; set; }
		public string Url { get; set; }
	}

	public class LinkAdded : IEvent
	{
		public string EventId { get; set; }
		public string CorrelationId { get; set; }
		public int Version { get; set; }
		public DateTime Time { get; set; }
		public string Url { get; set; }
	}
}