public static Lazy <Type> ReadLazyTypeForPart(this IDictionary <string, object> cache, Func <Assembly> assemblyLoader)
{
if (assemblyLoader == null)
{
return(LazyServices.MakeLazy(
() => cache.ReadMember <Type>(AttributedCacheServices.CacheKeys.PartType, (Type)null, (Func <Assembly>)null),
cache.ReadDictionary <object>(AttributedCacheServices.CacheKeys.PartType)
));
}
else
{
return(LazyServices.MakeLazy(
() => cache.ReadMember <Type>(AttributedCacheServices.CacheKeys.PartType, (Type)null, assemblyLoader)));
}
}
public void StrongTypeLazyWrapperFactory()
{
Func <Func <object>, object, object> factory = LazyServices.CreateStronglyTypedLazyFactory(typeof(string), null);
bool executed = false;
var lazy = (Lazy <string>)factory(
() =>
{
executed = true;
return("hi");
},
5);
Assert.IsType(typeof(Lazy <string>), lazy);
Assert.False(executed);
Assert.Equal("hi", lazy.Value);
Assert.True(executed);
}
public void StrongTypeLazyWrapperFactoryWithMetadata()
{
Func <Func <object>, object, object> factory = LazyServices.CreateStronglyTypedLazyFactory(typeof(string), typeof(int));
bool executed = false;
var lazy = (Lazy <string, int>)factory(
() =>
{
executed = true;
return("hi");
},
5);
Assert.False(executed);
Assert.Equal(5, lazy.Metadata);
Assert.False(executed);
Assert.Equal("hi", lazy.Value);
Assert.True(executed);
}
public static ComposablePartDefinition ReadPartDefinition(IDictionary <string, object> cache, Func <ComposablePartDefinition, IEnumerable <ImportDefinition> > importsCreator, Func <ComposablePartDefinition, IEnumerable <ExportDefinition> > exportsCreator, Func <Assembly> assemblyLoader)
{
Assumes.NotNull(cache);
Lazy <Type> partType = cache.ReadLazyTypeForPart(assemblyLoader);
ComposablePartDefinition part = null;
part = ReflectionModelServices.CreatePartDefinition(
partType,
cache.ReadValue <bool>(AttributedCacheServices.CacheKeys.IsDisposalRequired, false),
LazyServices.MakeLazy(() => importsCreator(part)),
LazyServices.MakeLazy(() => exportsCreator(part)),
cache.ReadLazyMetadata(),
null);
return(part);
}
public static Lazy <IDictionary <string, object> > ReadLazyMetadata(this IDictionary <string, object> cache)
{
Assumes.NotNull(cache);
return(LazyServices.MakeLazy(() => cache.ReadDictionary <object>(AttributedCacheServices.CacheKeys.Metadata)));
}
public static Lazy <ParameterInfo> ReadLazyParameter(this IDictionary <string, object> cache, Lazy <Type> defaultType)
{
Assumes.NotNull(cache);
return(LazyServices.MakeLazy(() => cache.ReadParameter(defaultType)));
}
