JSON.xtext

grammar org.xtext.example.mydsl.take1.MyDsl with org.eclipse.xtext.common.Terminals

generate myDsl "http://www.xtext.org/example/mydsl/take1/MyDsl"

Json: value=Val;

Obj:

	'{'
	      pairs+=Pair (',' pairs+=Pair)*

	'}'
	|
	 '{' '}'
	;

Pair:
	key=STRING ':' value=Val;

Val: ObjectValue | StringValue | ArrayValue | BooleanValue | NullValue | NumberValue;

Array:
	'[' values+=Val (',' values+=Val)* ']'
	|
	'[' ']'
	;

StringValue:
  value=STRING;

ObjectValue:
  value=Obj;

BooleanValue:
  value='true' | value='false';

NullValue:
  'null';

NumberValue:
  value=Number;

ArrayValue:
  value=Array;


terminal Number:
   '-'? INT ('.' INT)? (('E'|'e') '-'? INT)?;

XtextSerialization.java

// Setup and serializer
this.injector = new MyDslStandaloneSetup().createInjectorAndDoEMFRegistration();
this.serializer = injector.getInstance(Serializer.class);

// parsing is done via
IParser parser = injector.getInstance(IParser.class);
IParseResult result = parser.parse(new StringReader(input));

// serialization is done via
String code = serializer.serialize(object);