ExpressionProperty class

Package:

adaptive-expressions

Base class which defines an Expression or value for a property.

Constructors

ExpressionProperty(T | string | Expression, T)

Initializes a new instance of the ExpressionProperty class.

Properties

expressionText	Getes or sets the expression text to evaluate to get the value.
value	Gets or sets the raw value of the expression property.

Methods

getValue(object)	Get the value.
setValue(T | string | Expression)	Set the value.
toExpression()	This will return the existing expression if the value is non-complex type.
toString()	Convert an expression property to string.
tryGetValue(object)	Try to Get the value.

Constructor Details

ExpressionProperty(T | string | Expression, T)

Initializes a new instance of the ExpressionProperty class.

new ExpressionProperty(value?: T | string | Expression, defaultValue?: T)

Parameters

value

T | string | Expression

Optional. Raw value of the expression property.

defaultValue

T

Optional. Default value for the property.

Property Details

expressionText

Getes or sets the expression text to evaluate to get the value.

expressionText: string

Property Value

string

value

Gets or sets the raw value of the expression property.

value: T

Property Value

T

Method Details

getValue(object)

Get the value.

function getValue(data: object): T

Parameters

data

object

Data to use for expression binding.

Returns

T

The value.

Remarks

An error will be thrown if value is an invalid expression.

setValue(T | string | Expression)

Set the value.

function setValue(value: T | string | Expression)

Parameters

value

T | string | Expression

Value to set.

toExpression()

This will return the existing expression if the value is non-complex type.

function toExpression(): Expression

Returns

Expression

The existing expression if the value is non-complex type.

toString()

Convert an expression property to string.

function toString(): string

Returns

string

The converted string.

tryGetValue(object)

Try to Get the value.

function tryGetValue(data: object): { error: Error, value: T }

Parameters

data

object

Data to use for expression binding.

Returns

{ error: Error, value: T }

the value or an error.