IsSet (Smithy API 1.50.0)

java.lang.Object
- software.amazon.smithy.rulesengine.language.syntax.SyntaxElement
- - software.amazon.smithy.rulesengine.language.syntax.expressions.Expression
  - - software.amazon.smithy.rulesengine.language.syntax.expressions.functions.LibraryFunction
    - - software.amazon.smithy.rulesengine.language.syntax.expressions.functions.IsSet

All Implemented Interfaces:

FromSourceLocation, ToNode, TypeCheck, ToCondition, ToExpression
```
public final class IsSet
extends LibraryFunction
```
A rule-set function for determining whether a reference parameter is set.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class IsSet.Definition
A FunctionDefinition for the IsSet function.

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String ID
- Fields inherited from class software.amazon.smithy.rulesengine.language.syntax.expressions.functions.LibraryFunction
  definition, functionNode

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`<R> R`	`accept(ExpressionVisitor<R> visitor)`	Invoke the `ExpressionVisitor` functions for this expression.
`static IsSet.Definition`	`getDefinition()`	Gets the `FunctionDefinition` implementation.
`static IsSet`	`ofExpressions(ToExpression arg1)`	Creates a `IsSet` function from the given expressions.
`protected Type`	`typeCheckLocal(Scope<Type> scope)`

Methods inherited from class software.amazon.smithy.rulesengine.language.syntax.expressions.functions.LibraryFunction
equals, expectOneArgument, getArguments, getName, getSourceLocation, hashCode, toNode, toString

Methods inherited from class software.amazon.smithy.rulesengine.language.syntax.expressions.Expression
fromNode, getLiteral, getReference, of, of, of, parseShortform, toConditionBuilder, toExpression, type, typeCheck

Methods inherited from class software.amazon.smithy.rulesengine.language.syntax.SyntaxElement
booleanEqual, getAttr, getAttr, isSet, isValidHostLabel, not, parseUrl, stringEqual, substring, template

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface software.amazon.smithy.rulesengine.language.syntax.ToCondition
toCondition, toCondition

- Field Detail
  - ID
```
public static final java.lang.String ID
```
    See Also:
    
    Constant Field Values
- Method Detail
  - getDefinition
```
public static IsSet.Definition getDefinition()
```
    Gets the FunctionDefinition implementation.
    
    Returns:
    
    the function definition.
  - ofExpressions
```
public static IsSet ofExpressions(ToExpression arg1)
```
    Creates a IsSet function from the given expressions.
    
    Parameters:
    
    arg1 - the expression to negate.
    
    Returns:
    
    The resulting IsSet function.
  - accept
```
public <R> R accept(ExpressionVisitor<R> visitor)
```
    Description copied from class: Expression
    
    Invoke the ExpressionVisitor functions for this expression.
    
    Specified by:
    
    accept in class Expression
    
    Type Parameters:
    
    R - the visitor return type.
    
    Parameters:
    
    visitor - the visitor to be invoked.
    
    Returns:
    
    the return value of the visitor.
  - typeCheckLocal
```
protected Type typeCheckLocal(Scope<Type> scope)
```
    Overrides:
    
    typeCheckLocal in class LibraryFunction