FunctionDefinition (Smithy API 1.49.0)

All Known Implementing Classes:

AwsPartition.Definition, BooleanEquals.Definition, GetAttr.Definition, IsSet.Definition, IsValidHostLabel.Definition, IsVirtualHostableS3Bucket.Definition, Not.Definition, ParseArn.Definition, ParseUrl.Definition, StringEquals.Definition, Substring.Definition, UriEncode.Definition
```
public interface FunctionDefinition
```
An abstract definition of a rule-engine function.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`LibraryFunction`	`createFunction(FunctionNode functionNode)`	Creates a `LibraryFunction` implementation from the given `FunctionNode`.
`Value`	`evaluate(java.util.List<Value> arguments)`	Evaluate the arguments to a given function to compute a result.
`java.util.List<Type>`	`getArguments()`	The arguments to this function.
`java.lang.String`	`getId()`	The ID of this function.
`Type`	`getReturnType()`	The return type of this function definition.

- Method Detail
  - getId
```
java.lang.String getId()
```
    The ID of this function.
    
    Returns:
    
    The ID string
  - getArguments
```
java.util.List<Type> getArguments()
```
    The arguments to this function.
    
    Returns:
    
    The function arguments
  - getReturnType
```
Type getReturnType()
```
    The return type of this function definition.
    
    Returns:
    
    The function return type
  - evaluate
```
Value evaluate(java.util.List<Value> arguments)
```
    Evaluate the arguments to a given function to compute a result.
    
    Returns:
    
    The resulting value
  - createFunction
```
LibraryFunction createFunction(FunctionNode functionNode)
```
    Creates a LibraryFunction implementation from the given FunctionNode.
    
    Parameters:
    
    functionNode - the function node to deserialize.
    
    Returns:
    
    the created LibraryFunction implementation.