private void InitRequirements(ComponentRequirementMap map)
{
this.Requirements = new List <Type>();
IEnumerable <RequiredComponentAttribute> attribs = this.Component.GetTypeInfo().GetAttributesCached <RequiredComponentAttribute>();
foreach (RequiredComponentAttribute a in attribs)
{
Type reqType = a.RequiredComponentType;
// Don't require itself
if (reqType == this.Component)
{
continue;
}
// Ignore invalid constraints
if (!this.IsValidRequirement(a))
{
continue;
}
this.Requirements.AddRange(map.GetRequirements(reqType).Where(t => !this.Requirements.Contains(t)));
if (!this.Requirements.Contains(reqType))
{
this.Requirements.Add(reqType);
}
}
}
private void InitCreationChain(ComponentRequirementMap map)
{
this.CreationChain = new List <CreationChainItem>();
IEnumerable <RequiredComponentAttribute> attributes = this.Component.GetTypeInfo().GetAttributesCached <RequiredComponentAttribute>();
foreach (RequiredComponentAttribute attrib in attributes)
{
// Ignore invalid constraints
if (!this.IsValidRequirement(attrib))
{
continue;
}
// If this is a conditional creation, add the sub-chain of the Component to create
if (attrib.CreateDefaultType != attrib.RequiredComponentType)
{
this.AddCreationChainElements(map, attrib, attrib.CreateDefaultType);
}
// In any case, add the sub-chain of direct requirements
this.AddCreationChainElements(map, attrib, attrib.RequiredComponentType);
}
// Remove any duplicates that we might have generated in the creation chain
this.RemoveCreationChainDuplicates();
}
public void EnsureCreationChain(ComponentRequirementMap map)
{
if (this.initCreationChain == RecursiveInit.Initialized)
{
return;
}
if (this.initCreationChain == RecursiveInit.InProgress)
{
Logs.Core.WriteWarning(
"Detected a cyclic Component requirement in {0}. Requirements can not be ensured for cyclic dependencies.",
LogFormat.Type(this.Component));
return;
}
this.initCreationChain = RecursiveInit.InProgress;
this.InitCreationChain(map);
this.initCreationChain = RecursiveInit.Initialized;
}
private void AddCreationChainElements(ComponentRequirementMap map, RequiredComponentAttribute attrib, Type subChainType)
{
if (subChainType == this.Component)
{
return;
}
int baseIndex = this.CreationChain.Count;
int subChainLength = 0;
// Retrieve the creation sub-chain to satisfy this item's requirements
List <CreationChainItem> createTypeSubChain = map.GetCreationChain(subChainType);
foreach (CreationChainItem subItem in createTypeSubChain)
{
this.CreationChain.Add(subItem);
subChainLength++;
}
// Add the main item after its requirement items so we're always creating bottom-up
this.CreationChain.Add(new CreationChainItem
{
RequiredType = attrib.RequiredComponentType,
CreateType = attrib.CreateDefaultType
});
// If this is a conditional requirement, add a control item that checks the
// requirement and skips this item and its sub-chains if it's already met.
if (subChainLength > 0 && attrib.CreateDefaultType != attrib.RequiredComponentType)
{
this.CreationChain.Insert(baseIndex, new CreationChainItem
{
RequiredType = attrib.RequiredComponentType,
SkipIfExists = 1 + subChainLength
});
}
}