Package software.amazon.awscdk.services.iotevents

Class Expression

java.lang.Object

software.amazon.jsii.JsiiObject

software.amazon.awscdk.services.iotevents.Expression

All Implemented Interfaces:

software.amazon.jsii.JsiiSerializable

@Generated(value="jsii-pacmak/1.84.0 (build 5404dcf)",
           date="2023-06-19T16:30:37.229Z")
@Stability(Experimental)
public abstract class Expression
extends software.amazon.jsii.JsiiObject

(experimental) Expression for events in Detector Model state.

Example:

 // Example automatically generated from non-compiling source. May contain errors.
 import software.amazon.awscdk.services.iotevents.*;
 import software.amazon.awscdk.services.iotevents.actions.*;
 IInput input;
 State state = State.Builder.create()
         .stateName("MyState")
         .onEnter(List.of(Event.builder()
                 .eventName("test-event")
                 .condition(Expression.currentInput(input))
                 .actions(List.of(actions, List.of(
                     new SetVariableAction("MyVariable", Expression.inputAttribute(input, "payload.temperature")))))
                 .build()))
         .build();
 

See Also:

• https://docs.aws.amazon.com/iotevents/latest/developerguide/iotevents-expressions.html

Nested Class Summary

Nested classes/interfaces inherited from class software.amazon.jsii.JsiiObject

software.amazon.jsii.JsiiObject.InitializationMode

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Expression()
protected	Expression(software.amazon.jsii.JsiiObject.InitializationMode initializationMode)
protected	Expression(software.amazon.jsii.JsiiObjectRef objRef)

Method Summary

Modifier and Type	Method	Description
static Expression	and(Expression left, Expression right)	(experimental) Create a expression for the AND operator.
static Expression	currentInput(IInput input)	(experimental) Create a expression for function currentInput().
static Expression	eq(Expression left, Expression right)	(experimental) Create a expression for the Equal operator.
abstract String	evaluate()	(experimental) This is called to evaluate the expression.
abstract String	evaluate(Number parentPriority)	(experimental) This is called to evaluate the expression.
static Expression	fromString(String value)	(experimental) Create a expression from the given string.
static Expression	gt(Expression left, Expression right)	(experimental) Create a expression for the Greater Than operator.
static Expression	gte(Expression left, Expression right)	(experimental) Create a expression for the Greater Than Or Equal operator.
static Expression	inputAttribute(IInput input, String path)	(experimental) Create a expression for get an input attribute as $input.TemperatureInput.temperatures[2].
static Expression	lt(Expression left, Expression right)	(experimental) Create a expression for the Less Than operator.
static Expression	lte(Expression left, Expression right)	(experimental) Create a expression for the Less Than Or Equal operator.
static Expression	neq(Expression left, Expression right)	(experimental) Create a expression for the Not Equal operator.
static Expression	or(Expression left, Expression right)	(experimental) Create a expression for the OR operator.

Methods inherited from class software.amazon.jsii.JsiiObject

jsiiAsyncCall, jsiiAsyncCall, jsiiCall, jsiiCall, jsiiGet, jsiiGet, jsiiSet, jsiiStaticCall, jsiiStaticCall, jsiiStaticGet, jsiiStaticGet, jsiiStaticSet, jsiiStaticSet

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface software.amazon.jsii.JsiiSerializable

$jsii$toJson

Constructor Details

Expression

protected Expression(software.amazon.jsii.JsiiObjectRef objRef)

Expression

protected Expression(software.amazon.jsii.JsiiObject.InitializationMode initializationMode)

Expression

@Stability(Experimental)
protected Expression()

Method Details

and

@Stability(Experimental)
@NotNull
public static Expression and(@NotNull
 Expression left,
 @NotNull
 Expression right)

(experimental) Create a expression for the AND operator.

Parameters:

left - This parameter is required.

right - This parameter is required.

currentInput

@Stability(Experimental)
@NotNull
public static Expression currentInput(@NotNull
 IInput input)

(experimental) Create a expression for function currentInput().

It is evaluated to true if the specified input message was received.

Parameters:

input - This parameter is required.

eq

@Stability(Experimental)
@NotNull
public static Expression eq(@NotNull
 Expression left,
 @NotNull
 Expression right)

(experimental) Create a expression for the Equal operator.

Parameters:

left - This parameter is required.

right - This parameter is required.

fromString

@Stability(Experimental)
@NotNull
public static Expression fromString(@NotNull
 String value)

(experimental) Create a expression from the given string.

Parameters:

value - This parameter is required.

gt

@Stability(Experimental)
@NotNull
public static Expression gt(@NotNull
 Expression left,
 @NotNull
 Expression right)

(experimental) Create a expression for the Greater Than operator.

Parameters:

left - This parameter is required.

right - This parameter is required.

gte

@Stability(Experimental)
@NotNull
public static Expression gte(@NotNull
 Expression left,
 @NotNull
 Expression right)

(experimental) Create a expression for the Greater Than Or Equal operator.

Parameters:

left - This parameter is required.

right - This parameter is required.

inputAttribute

@Stability(Experimental)
@NotNull
public static Expression inputAttribute(@NotNull
 IInput input,
 @NotNull
 String path)

(experimental) Create a expression for get an input attribute as $input.TemperatureInput.temperatures[2].

Parameters:

input - This parameter is required.

path - This parameter is required.

lt

@Stability(Experimental)
@NotNull
public static Expression lt(@NotNull
 Expression left,
 @NotNull
 Expression right)

(experimental) Create a expression for the Less Than operator.

Parameters:

left - This parameter is required.

right - This parameter is required.

lte

@Stability(Experimental)
@NotNull
public static Expression lte(@NotNull
 Expression left,
 @NotNull
 Expression right)

(experimental) Create a expression for the Less Than Or Equal operator.

Parameters:

left - This parameter is required.

right - This parameter is required.

neq

@Stability(Experimental)
@NotNull
public static Expression neq(@NotNull
 Expression left,
 @NotNull
 Expression right)

(experimental) Create a expression for the Not Equal operator.

Parameters:

left - This parameter is required.

right - This parameter is required.

or

@Stability(Experimental)
@NotNull
public static Expression or(@NotNull
 Expression left,
 @NotNull
 Expression right)

(experimental) Create a expression for the OR operator.

Parameters:

left - This parameter is required.

right - This parameter is required.

evaluate

@Stability(Experimental)
@NotNull
public abstract String evaluate(@Nullable
 Number parentPriority)

(experimental) This is called to evaluate the expression.

Parameters:

parentPriority - priority of the parent of this expression, used for determining whether or not to add parenthesis around the expression.

evaluate

@Stability(Experimental)
@NotNull
public abstract String evaluate()

(experimental) This is called to evaluate the expression.