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ValueExpressionParserTCreateInstanceForTypeTValueExpressionAttribute, TExpressionScope(IEnumerablePropertyInfo, TypeRegistry) Method
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Generates a delegate that will create new instance of type
T accepting a
contextual
IValueExpressionScopeT object parameter applying any
specified
DefaultValueAttribute or
TValueExpressionAttribute
instances that are declared on the type
T properties.
Namespace: GSF.ComponentModelAssembly: GSF.Core (in GSF.Core.dll) Version: 2.4.182-beta
Syntax JavaScript does not support generic types or methods.
View SourceParameters
- properties IEnumerablePropertyInfo (Optional)
- Specific properties to target, or null to target all properties.
- typeRegistry TypeRegistry (Optional)
-
Type registry to use when parsing TValueExpressionAttribute instances, or null
to use DefaultTypeRegistry.
Type Parameters
- TValueExpressionAttribute
- IValueExpressionAttribute parameter type.
- TExpressionScope
- IValueExpressionScopeT parameter type.
Return Value
FuncTExpressionScope,
T
Generated delegate that will create new
T instances with expression values applied.
Remarks
This function is useful for generating a delegate to a compiled function that will create new
objects of type
T where properties of the type of have been decorated with
DefaultValueAttribute or
TValueExpressionAttribute attributes.
The newly created object will automatically have applied any defined default values as specified by
the encountered attributes. The generated delegate takes a parameter to a contextual object useful
for providing extra runtime data to
TValueExpressionAttribute attributes; the
parameter must be derived from
IValueExpressionScopeT. Any public fields,
methods or properties defined in the derived class will be automatically accessible from the
expressions declared in the
TValueExpressionAttribute attributes. By default,
the expressions will have access to the current
T instance by referencing the
this keyword, which is an alias to
Instance.
Note |
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This function will assign evaluated expression values to properties in a newly created model.
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See Also