Class ExpressionContextWrappingDecorator

A decorator class for the IGetsValueFromObject service, which detects instances of ExpressionContext and wraps them with an instance of NamedTalesValueForExpressionContextAdapter, so that subsequent classes in the decorator/chain may treat them as IGetsNamedTalesValue.

Inheritance
System.Object
ExpressionContextWrappingDecorator
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: ZptSharp.Expressions.PathExpressions
Assembly: ZptSharp.dll
Syntax
public class ExpressionContextWrappingDecorator : IGetsValueFromObject

Constructors

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ExpressionContextWrappingDecorator(RenderingConfig, IGetsBuiltinContextsProvider, IGetsValueFromObject)

Initializes a new instance of the ExpressionContextWrappingDecorator class.

Declaration
public ExpressionContextWrappingDecorator(RenderingConfig config, IGetsBuiltinContextsProvider builtinContextsProviderFactory, IGetsValueFromObject wrapped)
Parameters
Type Name Description
RenderingConfig config

Config.
IGetsBuiltinContextsProvider builtinContextsProviderFactory

Builtin contexts provider factory.
IGetsValueFromObject wrapped

Wrapped.

Methods

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TryGetValueAsync(String, Object, CancellationToken)

Returns the result from the wrapped service. If the object parameter is an instance of ExpressionContext then it is substituted in the call to the wrapped service with an instance of NamedTalesValueForExpressionContextAdapter wrapping the original context.

Declaration
public Task<GetValueResult> TryGetValueAsync(string name, object object, CancellationToken cancellationToken = default(CancellationToken))
Parameters
Type Name Description
System.String name

The value name.
System.Object object

The object from which to retrieve the value.
System.Threading.CancellationToken cancellationToken

An optional cancellation token.
Returns
Type Description
System.Threading.Tasks.Task<GetValueResult>

An object indicating whether a value was successfully retrieved or not, along with the retrieved value (if applicable).

Implements