private bool InheritFromSuperField(MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
bool inhertedIsInheriting = false;
MetaMetadataCompositeField inheritedField = (MetaMetadataCompositeField)SuperField;
if (inheritedField != null)
{
inheritedField.Repository = repository;
if (inheritedField.InheritInProcess)
{
inhertedIsInheriting = true;
// if inheriting from the root mmd, we need to clone and keep the environment right now.
InheritanceHandler inheritanceHandlerToUse = inheritanceHandler.clone();
inheritanceHandler.Pop(this);
//inheritedField.InheritFinished += (sender, e) => InheritFrom(repository, inheritedField);
this.AddInheritanceFinishHandler(inheritedField, InheritFieldFinished, inheritanceHandlerToUse);
}
else
{
inheritedField.InheritMetaMetadata(inheritanceHandler);
InheritFromCompositeField(inheritedField, repository, inheritanceHandler);
}
}
return(inhertedIsInheriting);
}
public InheritanceHandler clone()
{
InheritanceHandler cloned = new InheritanceHandler(rootMmd);
cloned.repository = this.repository;
cloned.mmStack = new Stack <MetaMetadataField>(this.mmStack);
//cloned.mmStack.addAll (this.mmStack);
cloned.scopeStack = new Stack <MultiAncestorScope <Object> >(this.scopeStack);
//cloned.scopeStack.addAll(this.scopeStack);
return(cloned);
}
protected override void InheritNonFieldElements(MetaMetadata inheritedMmd, InheritanceHandler inheritanceHandler)
{
base.InheritNonFieldElements(inheritedMmd, inheritanceHandler);
InheritAttributes(inheritedMmd);
if (this.genericTypeVars != null)
{
this.genericTypeVars.InheritFrom(inheritedMmd.genericTypeVars, inheritanceHandler);
}
//InheritSemanticActions(inheritedMmd);
}
protected override bool InheritMetaMetadataHelper(InheritanceHandler inheritanceHandler)
{
inheritanceHandler = new InheritanceHandler(this);
// init each field's declaringMmd to this (some of them may change during inheritance)
foreach (MetaMetadataField field in Kids.Values)
{
field.DeclaringMmd = this;
}
return(base.InheritMetaMetadataHelper(inheritanceHandler));
}
protected override bool InheritMetaMetadataHelper(InheritanceHandler inheritanceHandler)
{
/*
* the childComposite should hide all complexity between collection fields and composite fields,
* through hooks when necessary.
*/
int typeCode = this.GetFieldType();
switch (typeCode)
{
case FieldTypes.CollectionElement:
{
// prepare childComposite: possibly new name, type, extends, tag and inheritedField
MetaMetadataCompositeField childComposite = this.GetChildComposite();
if (childComposite.Name == UNRESOLVED_NAME)
{
childComposite.Name = (childType ?? Name);
}
childComposite.Type = childType; // here not using setter to reduce unnecessary re-assignment of this.childType
childComposite.ExtendsAttribute = ChildExtends;
childComposite.Tag = childTag;
childComposite.Repository = Repository;
childComposite.PackageName = PackageName;
if (SuperField != null)
{
childComposite.SuperField = (SuperField as MetaMetadataCollectionField).GetChildComposite();
}
childComposite.DeclaringMmd = DeclaringMmd;
childComposite.Scope = Scope;
childComposite.InheritMetaMetadata(inheritanceHandler); // inheritedMmd might be inferred from type/extends
TypeMmd = childComposite.TypeMmd;
Scope = childComposite.Scope;
break;
}
case FieldTypes.CollectionScalar:
{
MetaMetadataField inheritedField = SuperField;
if (inheritedField != null)
{
InheritAttributes(inheritedField);
}
break;
}
}
return(true);
}
private void InheritMetaMetadataFinished(MetaMetadataNestedField sender, EventArgs e)
{
MetaMetadata inheritedMmd = (MetaMetadata)_waitingToInheritFrom.Pop();
InheritanceHandler inheritanceHandler = _waitingToInheritFromInheritanceHandler.Pop();
InheritFromTopLevelMetaMetadata(inheritedMmd, Repository, inheritanceHandler);
InheritFromSuperField(Repository, inheritanceHandler);
if (_waitingToInheritFrom.Count == 0)
{
FinishInheritance();
}
}
public void InheritMetaMetadata(InheritanceHandler inheritanceHandler)
{
if (inheritDone || _inheritInProcess)
{
return;
}
//Debug.WriteLine("inheriting " + this);
_inheritInProcess = true;
if (InheritMetaMetadataHelper(inheritanceHandler))
{
FinishInheritance();
}
}
protected override bool InheritMetaMetadataHelper(InheritanceHandler inheritanceHandler)
{
inheritanceHandler.Push(this);
bool inhertedIsInheriting = false;
// init
MetaMetadataRepository repository = Repository;
// determine the structure we should inherit from
MetaMetadata inheritedMmd = FindOrGenerateInheritedMetaMetadata(repository, inheritanceHandler);
if (inheritedMmd != null)
{
if (inheritedMmd.InheritInProcess)
{
inhertedIsInheriting = true;
// if inheriting from the root mmd, we need to clone and keep the environment right now.
InheritanceHandler inheritanceHandlerToUse = inheritanceHandler.clone();
inheritanceHandler.Pop(this);
//inheritedMmd.InheritFinished += (sender, e) => InheritFromTopLevelMetaMetadata(inheritedMmd, repository);
this.AddInheritanceFinishHandler(inheritedMmd, InheritMetaMetadataFinished, inheritanceHandlerToUse);
}
else
{
inheritedMmd.InheritMetaMetadata(null); //edit
InheritFromTopLevelMetaMetadata(inheritedMmd, repository, inheritanceHandler);
}
}
if (!inhertedIsInheriting)
{
inhertedIsInheriting = InheritFromSuperField(repository, inheritanceHandler);
}
// for the root meta-metadata, this may happend
if (inheritedMmd == null && SuperField == null)
{
InheritFrom(repository, null, inheritanceHandler);
}
return(!inhertedIsInheriting);
}
public void InheritFrom(MmdGenericTypeVarScope superScope, InheritanceHandler inheritanceHandler)
{
if (superScope == null)
{
return;
}
foreach (MmdGenericTypeVar superGenericTypeVar in superScope.Values)
{
String name = superGenericTypeVar.Name;
MmdGenericTypeVar localGenericTypeVar = this.Get(name);
if (localGenericTypeVar == null)
{
this.Add(name, superGenericTypeVar);
}
else
{
localGenericTypeVar.ResolveArgAndBounds(this);
if (superGenericTypeVar.IsAssignment() && localGenericTypeVar.IsAssignment() &&
!superGenericTypeVar.Arg.Equals(localGenericTypeVar.Arg))
{
throw new MetaMetadataException("incompatiable assignments to a generic type var: "
+ name);
}
else if (superGenericTypeVar.IsAssignment() && localGenericTypeVar.IsBound())
{
throw new MetaMetadataException("generic type already assigned: " + name);
}
else if (superGenericTypeVar.IsBound() && localGenericTypeVar.IsAssignment())
{
CheckAssignmentWithBounds(name, localGenericTypeVar, superGenericTypeVar,
inheritanceHandler);
}
else
{
CheckBoundsWithBounds(name, localGenericTypeVar, superGenericTypeVar, inheritanceHandler);
}
}
}
}
private void CheckAssignmentWithBounds(String name, MmdGenericTypeVar argGtv,
MmdGenericTypeVar boundGtv, InheritanceHandler inheritanceHandler)
{
MetaMetadata argMmd = inheritanceHandler.ResolveMmdName(argGtv.Arg);
argMmd.InheritMetaMetadata(null);
MetaMetadata lowerBoundMmd = inheritanceHandler.ResolveMmdName(boundGtv.ExtendsAttribute);
lowerBoundMmd.InheritMetaMetadata(null);
bool satisfyLowerBound = lowerBoundMmd == null || argMmd.IsDerivedFrom(lowerBoundMmd);
// MetaMetadata upperBoundMmd = inheritanceHandler.resolveMmdName(localGtv.getSuperAttribute());
// boolean satisfyUpperBound = upperBoundMmd == null || upperBoundMmd.isDerivedFrom(argMmd);
if (!satisfyLowerBound /* || !satisfyUpperBound */)
{
throw new MetaMetadataException("generic type bound(s) not satisfied: " + name);
}
}
private void CheckBoundsWithBounds(String name, MmdGenericTypeVar local, MmdGenericTypeVar other,
InheritanceHandler inheritanceHandler)
{
MetaMetadata lowerBoundMmdLocal = inheritanceHandler.ResolveMmdName(local.ExtendsAttribute);
lowerBoundMmdLocal.InheritMetaMetadata(null);
MetaMetadata lowerBoundMmdOther = inheritanceHandler.ResolveMmdName(other.ExtendsAttribute);
lowerBoundMmdOther.InheritMetaMetadata(null);
bool lowerBoundsCompatible = lowerBoundMmdOther == null ||
lowerBoundMmdLocal.IsDerivedFrom(lowerBoundMmdOther);
// TODO upperBoundsCompatible
if (!lowerBoundsCompatible /* || !upperBoundsCompatible */)
{
throw new MetaMetadataException("generic type bound(s) not compatible: " + name);
}
}
protected virtual MetaMetadata FindOrGenerateInheritedMetaMetadata(MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
MetaMetadata inheritedMmd = this.TypeMmd;
if (inheritedMmd == null)
{
MmdScope mmdScope = this.Scope;
String inheritedMmdName = Type ?? Name;
if (ExtendsAttribute != null)
{
// determine new type name
if (inheritedMmdName == null)
throw new MetaMetadataException("attribute 'name' must be specified: " + this);
if (inheritanceHandler.ResolveMmdName(inheritedMmdName) != null)
// currently we don't encourage re-using existing name. however, in the future, when package names are available, we can change this.
throw new MetaMetadataException("meta-metadata '" + inheritedMmdName + "' already exists! please use another name to prevent name collision. hint: use 'tag' to change the tag if needed.");
// determine from which meta-metadata to inherit
inheritedMmd = inheritanceHandler.ResolveMmdName(ExtendsAttribute);
if (ExtendsAttribute == null || inheritedMmd == null)
throw new MetaMetadataException("super type not specified or recognized: " + this + ", super type name: " + ExtendsAttribute);
// generate inline mmds and put it into current scope
MetaMetadata generatedMmd = this.GenerateMetaMetadata(inheritedMmdName, inheritedMmd);
mmdScope.Put(inheritedMmdName, generatedMmd);
mmdScope.Put(generatedMmd.Name, generatedMmd);
// recursively do inheritance on generated mmd
generatedMmd.InheritMetaMetadata(null); // this will set generateClassDescriptor to true if necessary
MakeThisFieldUseMmd(inheritedMmdName, generatedMmd);
return generatedMmd;
}
else
{
// use type / extends
if (inheritedMmdName == null)
throw new MetaMetadataException("no type / extends defined for " + this
+ " (note that due to a limitation explicit child_scalar_type is needed for scalar collection fields, even if it has been declared in super field).");
NameType[] nameType = new NameType[1];
inheritedMmd = inheritanceHandler.ResolveMmdName(inheritedMmdName, nameType);
if (inheritedMmd == null)
throw new MetaMetadataException("meta-metadata not found: " + inheritedMmdName + " (if you want to define new types inline, you need to specify extends/child_extends).");
if (!inheritedMmdName.Equals(inheritedMmd.Name) && nameType[0] == NameType.MMD)
{
// could be inline mmd
this.MakeThisFieldUseMmd(inheritedMmdName, inheritedMmd);
}
// process normal mmd / field
Debug.WriteLine("setting " + this + ".inheritedMmd to " + inheritedMmd);
TypeMmd = inheritedMmd;
}
}
return inheritedMmd;
}
protected override void InheritFrom(MetaMetadataRepository repository, MetaMetadataCompositeField inheritedStructure, InheritanceHandler inheritanceHandler)
{
base.InheritFrom(repository, inheritedStructure, inheritanceHandler);
// for fields referring to this meta-metadata type
// need to do inheritMetaMetadata() again after copying fields from this.getInheritedMmd()
/* foreach (MetaMetadataField f in this.Kids.Values)
* {
* if (f.GetType() == typeof(MetaMetadataNestedField))
* {
* MetaMetadataNestedField nested = (MetaMetadataNestedField) f;
* if (nested.InheritedMmd == this)
* {
* nested.ClearInheritFinishedOrInProgressFlag();
* nested.InheritMetaMetadata();
* }
* }
* }
*/
}
protected override bool InheritMetaMetadataHelper(InheritanceHandler inheritanceHandler)
{
/*
* the childComposite should hide all complexity between collection fields and composite fields,
* through hooks when necessary.
*/
int typeCode = this.GetFieldType();
switch (typeCode)
{
case FieldTypes.CollectionElement:
{
// prepare childComposite: possibly new name, type, extends, tag and inheritedField
MetaMetadataCompositeField childComposite = this.GetChildComposite();
if (childComposite.Name == UNRESOLVED_NAME)
childComposite.Name = (childType ?? Name);
childComposite.Type = childType; // here not using setter to reduce unnecessary re-assignment of this.childType
childComposite.ExtendsAttribute = ChildExtends;
childComposite.Tag = childTag;
childComposite.Repository = Repository;
childComposite.PackageName = PackageName;
if (SuperField != null)
childComposite.SuperField = (SuperField as MetaMetadataCollectionField).GetChildComposite();
childComposite.DeclaringMmd = DeclaringMmd;
childComposite.Scope = Scope;
childComposite.InheritMetaMetadata(inheritanceHandler); // inheritedMmd might be inferred from type/extends
TypeMmd = childComposite.TypeMmd;
Scope = childComposite.Scope;
break;
}
case FieldTypes.CollectionScalar:
{
MetaMetadataField inheritedField = SuperField;
if (inheritedField != null)
InheritAttributes(inheritedField);
break;
}
}
return true;
}
private bool InheritFromSuperField(MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
bool inhertedIsInheriting = false;
MetaMetadataCompositeField inheritedField = (MetaMetadataCompositeField)SuperField;
if (inheritedField != null)
{
inheritedField.Repository = repository;
if (inheritedField.InheritInProcess)
{
inhertedIsInheriting = true;
// if inheriting from the root mmd, we need to clone and keep the environment right now.
InheritanceHandler inheritanceHandlerToUse = inheritanceHandler.clone();
inheritanceHandler.Pop(this);
//inheritedField.InheritFinished += (sender, e) => InheritFrom(repository, inheritedField);
this.AddInheritanceFinishHandler(inheritedField, InheritFieldFinished, inheritanceHandlerToUse);
}
else
{
inheritedField.InheritMetaMetadata(inheritanceHandler);
InheritFromCompositeField(inheritedField, repository, inheritanceHandler);
}
}
return inhertedIsInheriting;
}
protected virtual void InheritNonFieldElements(MetaMetadata inheritedMmd, InheritanceHandler inheritanceHandler)
{
Scope = new MmdScope(Scope, inheritedMmd.Scope);
}
public void AddInheritanceFinishHandler(MetaMetadataNestedField inheritingField, InheritFinishedEventHandler eventHandler, InheritanceHandler inheritanceHandler)
{
if (_waitingToInheritFrom == null)
{
_waitingToInheritFrom = new Stack <MetaMetadataNestedField>();
}
_waitingToInheritFrom.Push(inheritingField);
//adding the InheritanceHandler for this inheritingField
if (_waitingToInheritFromInheritanceHandler == null)
{
_waitingToInheritFromInheritanceHandler = new Stack <InheritanceHandler>();
}
_waitingToInheritFromInheritanceHandler.Push(inheritanceHandler);
inheritingField.InheritFinished += eventHandler;
}
protected virtual MetaMetadata FindOrGenerateInheritedMetaMetadata(MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
MetaMetadata inheritedMmd = this.TypeMmd;
if (inheritedMmd == null)
{
MmdScope mmdScope = this.Scope;
String inheritedMmdName = Type ?? Name;
if (ExtendsAttribute != null)
{
// determine new type name
if (inheritedMmdName == null)
{
throw new MetaMetadataException("attribute 'name' must be specified: " + this);
}
if (inheritanceHandler.ResolveMmdName(inheritedMmdName) != null)
{
// currently we don't encourage re-using existing name. however, in the future, when package names are available, we can change this.
throw new MetaMetadataException("meta-metadata '" + inheritedMmdName + "' already exists! please use another name to prevent name collision. hint: use 'tag' to change the tag if needed.");
}
// determine from which meta-metadata to inherit
inheritedMmd = inheritanceHandler.ResolveMmdName(ExtendsAttribute);
if (ExtendsAttribute == null || inheritedMmd == null)
{
throw new MetaMetadataException("super type not specified or recognized: " + this + ", super type name: " + ExtendsAttribute);
}
// generate inline mmds and put it into current scope
MetaMetadata generatedMmd = this.GenerateMetaMetadata(inheritedMmdName, inheritedMmd);
mmdScope.Put(inheritedMmdName, generatedMmd);
mmdScope.Put(generatedMmd.Name, generatedMmd);
// recursively do inheritance on generated mmd
generatedMmd.InheritMetaMetadata(null); // this will set generateClassDescriptor to true if necessary
MakeThisFieldUseMmd(inheritedMmdName, generatedMmd);
return(generatedMmd);
}
else
{
// use type / extends
if (inheritedMmdName == null)
{
throw new MetaMetadataException("no type / extends defined for " + this
+ " (note that due to a limitation explicit child_scalar_type is needed for scalar collection fields, even if it has been declared in super field).");
}
NameType[] nameType = new NameType[1];
inheritedMmd = inheritanceHandler.ResolveMmdName(inheritedMmdName, nameType);
if (inheritedMmd == null)
{
throw new MetaMetadataException("meta-metadata not found: " + inheritedMmdName + " (if you want to define new types inline, you need to specify extends/child_extends).");
}
if (!inheritedMmdName.Equals(inheritedMmd.Name) && nameType[0] == NameType.MMD)
{
// could be inline mmd
this.MakeThisFieldUseMmd(inheritedMmdName, inheritedMmd);
}
// process normal mmd / field
Debug.WriteLine("setting " + this + ".inheritedMmd to " + inheritedMmd);
TypeMmd = inheritedMmd;
}
}
return(inheritedMmd);
}
protected virtual void InheritNonFieldElements(MetaMetadata inheritedMmd, InheritanceHandler inheritanceHandler)
{
Scope = new MmdScope(Scope, inheritedMmd.Scope);
}
protected virtual void InheritFrom(MetaMetadataRepository repository,
MetaMetadataCompositeField inheritedStructure,
InheritanceHandler inheritanceHandler)
{
// init nested fields inside this
var subfields = Kids.Values;
foreach (MetaMetadataField f in subfields)
{
if (f is MetaMetadataNestedField)
{
f.Repository = (repository);
MetaMetadataNestedField nested = (MetaMetadataNestedField)f;
if (nested.PackageName == null)
{
nested.PackageName = PackageName;
}
nested.Scope = Scope;
}
}
// inherit fields with attributes from inheritedStructure
// if inheritedStructure == null, this must be the root meta-metadata
if (inheritedStructure != null)
{
var inheritedStructSubfields = inheritedStructure.Kids.Values;
foreach (MetaMetadataField field in inheritedStructSubfields)
{
if (field is MetaMetadataNestedField)
{
((MetaMetadataNestedField)field).InheritMetaMetadata(inheritanceHandler);
}
string fieldName = field.Name;
MetaMetadataField fieldLocal;
kids.TryGetValue(fieldName, out fieldLocal);
if (fieldLocal == null && inheritanceHandler.IsUsingGenerics(field))
{
// if the super field is using generics, we will need to re-evaluate generic type vars
fieldLocal = (MetaMetadataField)Activator.CreateInstance(field.GetType());
//Prepare Child Field For Inheritance
fieldLocal.Repository = (repository);
if (fieldLocal is MetaMetadataNestedField)
{
MetaMetadataNestedField nested = (MetaMetadataNestedField)fieldLocal;
if (nested.PackageName == null)
{
nested.PackageName = PackageName;
}
nested.Scope = Scope;
}
}
if (fieldLocal != null)
{
Debug.WriteLine("inheriting field: " + fieldLocal + " <= " + field);
if (field.GetType() != fieldLocal.GetType())
{
Debug.WriteLine("local field " + fieldLocal + " hides field " + fieldLocal +
" with the same name in super mmd type!");
}
// debug("inheriting field " + fieldLocal + " from " + field);
if (field != fieldLocal)
{
fieldLocal.SuperField = field;
}
fieldLocal.DeclaringMmd = field.DeclaringMmd;
fieldLocal.InheritAttributes(field);
if (fieldLocal is MetaMetadataNestedField)
{
((MetaMetadataNestedField)fieldLocal).PackageName =
((MetaMetadataNestedField)field).PackageName;
}
}
}
}
// recursively call inheritMetaMetadata() on nested fields
foreach (MetaMetadataField f in subfields)
{
// a new field is defined inside this mmd
if (f.DeclaringMmd == this && f.SuperField == null)
{
SetNewMetadataClass(true);
}
// recursively call this method on nested fields
f.Repository = repository;
if (f is MetaMetadataNestedField)
{
MetaMetadataNestedField f1 = (MetaMetadataNestedField)f;
f1.InheritMetaMetadata(inheritanceHandler);
if (f1.IsNewMetadataClass())
{
SetNewMetadataClass(true);
}
MetaMetadataNestedField f0 = (MetaMetadataNestedField)f.SuperField;
if (f0 != null && f0.GetTypeName() != f1.GetTypeName())
{
// inherited field w changing base type (polymorphic case)
f1.InheritMetaMetadata(inheritanceHandler);
MetaMetadata mmd0 = f0.TypeMmd;
MetaMetadata mmd1 = f1.TypeMmd;
if (mmd1.IsDerivedFrom(mmd0))
{
SetNewMetadataClass(true);
}
else
{
throw new MetaMetadataException("incompatible types: " + mmd0 + " => " + mmd1);
}
}
}
}
// clone fields only declared in inheritedStructure.
// must clone them after recursively calling inheritMetaMetadata(), so that their nested
// structures (which may be inherited too) can be cloned.
if (inheritedStructure != null)
{
var inheritedStructSubfields = inheritedStructure.Kids.Values;
foreach (MetaMetadataField field in inheritedStructSubfields)
{
string fieldName = field.Name;
MetaMetadataField fieldLocal;
kids.TryGetValue(fieldName, out fieldLocal);
if (fieldLocal == null)
{
// MetaMetadataField clonedField = (MetaMetadataField) field.clone();
// clonedField.setParent(this);
// this.getChildMetaMetadata().put(fieldName, clonedField);
kids.Put(fieldName, field);
}
}
}
}
private void InheritFromTopLevelMetaMetadata(MetaMetadata inheritedMmd, MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
InheritNonFieldElements(inheritedMmd, inheritanceHandler);
InheritFrom(repository, inheritedMmd, inheritanceHandler);
}
private void InheritFromCompositeField(MetaMetadataCompositeField inheritedField, MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
InheritFrom(repository, inheritedField, inheritanceHandler);
}
protected abstract bool InheritMetaMetadataHelper(InheritanceHandler inheritanceHandler);
protected virtual void InheritFrom(MetaMetadataRepository repository,
MetaMetadataCompositeField inheritedStructure,
InheritanceHandler inheritanceHandler)
{
// init nested fields inside this
var subfields = Kids.Values;
foreach (MetaMetadataField f in subfields)
if (f is MetaMetadataNestedField)
{
f.Repository = (repository);
MetaMetadataNestedField nested = (MetaMetadataNestedField) f;
if (nested.PackageName == null)
nested.PackageName = PackageName;
nested.Scope = Scope;
}
// inherit fields with attributes from inheritedStructure
// if inheritedStructure == null, this must be the root meta-metadata
if (inheritedStructure != null)
{
var inheritedStructSubfields = inheritedStructure.Kids.Values;
foreach (MetaMetadataField field in inheritedStructSubfields)
{
if (field is MetaMetadataNestedField)
{
((MetaMetadataNestedField)field).InheritMetaMetadata(inheritanceHandler);
}
string fieldName = field.Name;
MetaMetadataField fieldLocal;
kids.TryGetValue(fieldName, out fieldLocal);
if (fieldLocal == null && inheritanceHandler.IsUsingGenerics(field))
{
// if the super field is using generics, we will need to re-evaluate generic type vars
fieldLocal = (MetaMetadataField) Activator.CreateInstance(field.GetType());
//Prepare Child Field For Inheritance
fieldLocal.Repository = (repository);
if (fieldLocal is MetaMetadataNestedField)
{
MetaMetadataNestedField nested = (MetaMetadataNestedField)fieldLocal;
if (nested.PackageName == null)
nested.PackageName = PackageName;
nested.Scope = Scope;
}
}
if (fieldLocal != null)
{
Debug.WriteLine("inheriting field: " + fieldLocal + " <= " + field);
if (field.GetType() != fieldLocal.GetType())
Debug.WriteLine("local field " + fieldLocal + " hides field " + fieldLocal +
" with the same name in super mmd type!");
// debug("inheriting field " + fieldLocal + " from " + field);
if (field != fieldLocal)
fieldLocal.SuperField = field;
fieldLocal.DeclaringMmd = field.DeclaringMmd;
fieldLocal.InheritAttributes(field);
if (fieldLocal is MetaMetadataNestedField)
((MetaMetadataNestedField)fieldLocal).PackageName =
((MetaMetadataNestedField)field).PackageName;
}
}
}
// recursively call inheritMetaMetadata() on nested fields
foreach (MetaMetadataField f in subfields)
{
// a new field is defined inside this mmd
if (f.DeclaringMmd == this && f.SuperField == null)
SetNewMetadataClass(true);
// recursively call this method on nested fields
f.Repository = repository;
if (f is MetaMetadataNestedField)
{
MetaMetadataNestedField f1 = (MetaMetadataNestedField) f;
f1.InheritMetaMetadata(inheritanceHandler);
if (f1.IsNewMetadataClass())
SetNewMetadataClass(true);
MetaMetadataNestedField f0 = (MetaMetadataNestedField) f.SuperField;
if (f0 != null && f0.GetTypeName() != f1.GetTypeName())
{
// inherited field w changing base type (polymorphic case)
f1.InheritMetaMetadata(inheritanceHandler);
MetaMetadata mmd0 = f0.TypeMmd;
MetaMetadata mmd1 = f1.TypeMmd;
if (mmd1.IsDerivedFrom(mmd0))
SetNewMetadataClass(true);
else
throw new MetaMetadataException("incompatible types: " + mmd0 + " => " + mmd1);
}
}
}
// clone fields only declared in inheritedStructure.
// must clone them after recursively calling inheritMetaMetadata(), so that their nested
// structures (which may be inherited too) can be cloned.
if (inheritedStructure != null)
{
var inheritedStructSubfields = inheritedStructure.Kids.Values;
foreach (MetaMetadataField field in inheritedStructSubfields)
{
string fieldName = field.Name;
MetaMetadataField fieldLocal;
kids.TryGetValue(fieldName, out fieldLocal);
if (fieldLocal == null)
{
// MetaMetadataField clonedField = (MetaMetadataField) field.clone();
// clonedField.setParent(this);
// this.getChildMetaMetadata().put(fieldName, clonedField);
kids.Put(fieldName, field);
}
}
}
}
protected override bool InheritMetaMetadataHelper(InheritanceHandler inheritanceHandler)
{
inheritanceHandler.Push(this);
bool inhertedIsInheriting = false;
// init
MetaMetadataRepository repository = Repository;
// determine the structure we should inherit from
MetaMetadata inheritedMmd = FindOrGenerateInheritedMetaMetadata(repository, inheritanceHandler);
if (inheritedMmd != null)
{
if (inheritedMmd.InheritInProcess)
{
inhertedIsInheriting = true;
// if inheriting from the root mmd, we need to clone and keep the environment right now.
InheritanceHandler inheritanceHandlerToUse = inheritanceHandler.clone();
inheritanceHandler.Pop(this);
//inheritedMmd.InheritFinished += (sender, e) => InheritFromTopLevelMetaMetadata(inheritedMmd, repository);
this.AddInheritanceFinishHandler(inheritedMmd, InheritMetaMetadataFinished, inheritanceHandlerToUse);
}
else
{
inheritedMmd.InheritMetaMetadata(null); //edit
InheritFromTopLevelMetaMetadata(inheritedMmd, repository, inheritanceHandler);
}
}
if (!inhertedIsInheriting)
{
inhertedIsInheriting = InheritFromSuperField(repository, inheritanceHandler);
}
// for the root meta-metadata, this may happend
if (inheritedMmd == null && SuperField == null)
InheritFrom(repository, null, inheritanceHandler);
return !inhertedIsInheriting;
}
public void AddInheritanceFinishHandler(MetaMetadataNestedField inheritingField, InheritFinishedEventHandler eventHandler, InheritanceHandler inheritanceHandler)
{
if (_waitingToInheritFrom == null)
_waitingToInheritFrom = new Stack<MetaMetadataNestedField>();
_waitingToInheritFrom.Push(inheritingField);
//adding the InheritanceHandler for this inheritingField
if (_waitingToInheritFromInheritanceHandler == null)
_waitingToInheritFromInheritanceHandler = new Stack<InheritanceHandler>();
_waitingToInheritFromInheritanceHandler.Push(inheritanceHandler);
inheritingField.InheritFinished += eventHandler;
}
private void InheritFromCompositeField(MetaMetadataCompositeField inheritedField, MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
InheritFrom(repository, inheritedField, inheritanceHandler);
}
public void InheritMetaMetadata(InheritanceHandler inheritanceHandler)
{
if (inheritDone || _inheritInProcess) return;
//Debug.WriteLine("inheriting " + this);
_inheritInProcess = true;
if (InheritMetaMetadataHelper(inheritanceHandler))
FinishInheritance();
}
private void InheritFromTopLevelMetaMetadata(MetaMetadata inheritedMmd, MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
InheritNonFieldElements(inheritedMmd, inheritanceHandler);
InheritFrom(repository, inheritedMmd, inheritanceHandler);
}
protected abstract bool InheritMetaMetadataHelper(InheritanceHandler inheritanceHandler);
public InheritanceHandler clone()
{
InheritanceHandler cloned = new InheritanceHandler(rootMmd);
cloned.repository = this.repository;
cloned.mmStack = new Stack<MetaMetadataField>(this.mmStack);
//cloned.mmStack.addAll (this.mmStack);
cloned.scopeStack = new Stack<MultiAncestorScope<Object>>(this.scopeStack);
//cloned.scopeStack.addAll(this.scopeStack);
return cloned;
}
protected override MetaMetadata FindOrGenerateInheritedMetaMetadata(MetaMetadataRepository repository, InheritanceHandler inheritanceHandler)
{
if (MetaMetadata.IsRootMetaMetadata(this))
{
return(null);
}
MetaMetadata inheritedMmd = this.TypeMmd;
if (inheritedMmd == null)
{
String inheritedMmdName = this.Type;
if (inheritedMmdName == null)
{
inheritedMmdName = this.ExtendsAttribute;
SetNewMetadataClass(true);
}
if (inheritedMmdName == null)
{
throw new MetaMetadataException("no type/extends specified: " + this);
}
inheritedMmd = (MetaMetadata)this.Scope[inheritedMmdName];
if (inheritedMmd == null)
{
throw new MetaMetadataException("meta-metadata '" + inheritedMmdName + "' not found.");
}
TypeMmd = inheritedMmd;
}
return(inheritedMmd);
}
