Bootstrapped Metamodel

Klass has a metamodel a model of models In fact it has several representations of the same metamodel The Abstract Syntax Tree used internally by the compiler The in memory DomainModel object returned upon successful compilation The bootstrapped metamodel etc The bootstrapped metamodel is expressed like a regular model The first few meta types are defined like this The full source is too large to include here It defines enumeration class association projection and service plus their parts The bootstrapped metamodel allows us to work with metadata like regular data It defines some projections and services which return model data For example here s the service to get a class by its name package klass model meta domain interface Element interface NamedElement implements Element name String key maximumLength 256 ordinal Integer private class PackageableElement abstract implements NamedElement packageName String maximumLength 100000 class Classifier abstract extends PackageableElement class Klass extends Classifier superClassName String private maximumLength 256 abstractClass Boolean enumeration PrimitiveType INTEGER Integer LONG Long DOUBLE Double FLOAT Float BOOLEAN Boolean STRING String INSTANT Instant LOCAL_DATE LocalDate TEMPORAL_INSTANT TemporalInstant TEMPORAL_RANGE TemporalRange enumeration Multiplicity ZERO_TO_ONE 0 1 ONE_TO_ONE 1 1 ZERO_TO_MANY 0 * ONE_TO_MANY 1 * class DataTypeProperty abstract implements NamedElement classifierName String key maximumLength 256 optional Boolean class PrimitiveProperty extends DataTypeProperty primitiveType PrimitiveType maximumLength 256 association ClassifierHasDataTypeTypeProperties owningClassifier Classifier 1 1 dataTypeProperties DataTypeProperty 0 * owned orderBy this ordinal ascending package klass model meta domain projection KlassProjection on Klass name NamedElement name packageName PackageableElement packageName abstractClass Klass abstractClass superInterfaces ClassifierInterfaceMappingProjection classifierModifiers ClassifierModifierProjection dataTypeProperties DataTypePropertyProjection superClass name NamedElement name associationEnds name NamedElement name parameterizedProperties ParameterizedPropertyProjection service KlassResource on Klass meta class name String 1 1 GET multiplicity one criteria this name name projection KlassProjection meta class GET multiplicity many criteria all projection KlassProjection orderBy this ordinal ascending