private bool resolveSiteFromAnywhere(IInjectionSite site)
{
if (string.IsNullOrEmpty(site.HintPath))
{
// if no hint path is given just search from the scene root objects
return(resolveSiteFromRootObjects(site));
}
// search from the hint path object
GameObject objectToSearchFrom = getObjectFromHint(site.HintPath);
if (objectToSearchFrom == null)
{
if (site.Required)
{
Debug.LogError($"Unable to inject dependency for {injectionSiteDebugString(site)} - " +
$"Hint path '{site.HintPath}' did not correspond to a GameObject in the scene " +
$"hierarchy");
}
return(false);
}
return(resolveSiteFromObject(site, objectToSearchFrom));
}
private bool resolveSiteFromRootObjects(IInjectionSite site)
{
var rootObjects = getSceneRootObjects();
switch (site.SearchMethod)
{
case Search.Breadth:
return(resolveSiteBreadthFirst(site, rootObjects));
case Search.Depth:
return(resolveSiteDepthFirst(site, rootObjects));
default:
throw new ArgumentOutOfRangeException();
}
}
private bool resolveSite(IInjectionSite site, MonoBehaviour script)
{
switch (site.FromSource)
{
case From.Anywhere:
return(resolveSiteFromAnywhere(site));
case From.Parents:
return(resolveSiteFromParents(site, script));
case From.Children:
return(resolveSiteFromChildren(site, script));
default:
throw new ArgumentOutOfRangeException();
}
}
private bool resolveSiteFromObject(IInjectionSite site, GameObject gameObject)
{
switch (site.SearchMethod)
{
case Search.Breadth:
return(resolveSiteBreadthFirst(site, new List <GameObject> {
gameObject
}));
case Search.Depth:
return(resolveSiteDepthFirst(site, new List <GameObject> {
gameObject
}));
default:
throw new ArgumentOutOfRangeException();
}
}
private Component findInjectionSource(IInjectionSite site, GameObject sourceObject)
{
var foundSites = findAllInjectionSources(site.SiteType, sourceObject).ToList();
if (foundSites.Any())
{
if (foundSites.Count > 1)
{
Debug.LogWarning($"Found more than one injection source on object " +
$"'{sourceObject}' for {injectionSiteDebugString(site)} - potential " +
$"ambiguity issues. Picking the first one.");
}
return(foundSites.First());
}
return(null);
}
private bool resolveSiteBreadthFirst(IInjectionSite site, List <GameObject> rootNodes)
{
foreach (var gameObject in breadthFirstTraversal(rootNodes))
{
var source = findInjectionSource(site, gameObject);
if (source != null)
{
site.Resolve(source);
return(true);
}
}
if (site.Required)
{
Debug.LogWarning("Unable to find dependency source from anywhere (used breadth-first strategy)");
}
return(false);
}
private bool resolveSiteFromParents(IInjectionSite site, MonoBehaviour script)
{
// search for source upwards from script object
foreach (var gameObject in ancestors(script.gameObject))
{
var source = findInjectionSource(site, gameObject);
if (source != null)
{
site.Resolve(source);
return(true);
}
}
if (site.Required)
{
Debug.LogWarning("Unable to find dependency source in parents");
}
return(false);
}
private bool resolveSiteFromChildren(IInjectionSite site, MonoBehaviour script)
{
IEnumerable <GameObject> children;
switch (site.SearchMethod)
{
case Search.Breadth:
children = breadthFirstTraversal(new List <GameObject> {
script.gameObject
});
break;
case Search.Depth:
children = depthFirstTraversal(new List <GameObject> {
script.gameObject
});
break;
default:
throw new ArgumentOutOfRangeException();
}
foreach (var gameObject in children)
{
var source = findInjectionSource(site, gameObject);
if (source != null)
{
site.Resolve(source);
return(true);
}
}
if (site.Required)
{
Debug.LogWarning("Unable to find dependency source in children");
}
return(false);
}
private string injectionSiteDebugString(IInjectionSite site)
{
return($"object '{site.Script.gameObject.name}' at site {site.Script.name}.{site.Name} ({site.SiteType})");
}