IndexExpression (Smithy API 1.49.0)

java.lang.Object
- software.amazon.smithy.jmespath.JmespathExpression
- - software.amazon.smithy.jmespath.ast.IndexExpression

```
public final class IndexExpression
extends JmespathExpression
```
Gets a specific element by zero-based index.
Use a negative index to get an element from the end of the array (e.g., -1 is used to get the last element of the array). If an array element does not exist, a null value is returned.

See Also:

Index Expressions

Constructor Summary

Constructors
Constructor Description

IndexExpression(int index)

IndexExpression(int index, int line, int column)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`<T> T`	`accept(ExpressionVisitor<T> visitor)`	Visits a node using a double-dispatch visitor.
`boolean`	`equals(java.lang.Object o)`
`int`	`getIndex()`	Gets the index to retrieve.
`int`	`hashCode()`
`java.lang.String`	`toString()`

Methods inherited from class software.amazon.smithy.jmespath.JmespathExpression
getColumn, getLine, lint, lint, parse

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

- Constructor Detail
  - IndexExpression
```
public IndexExpression(int index)
```
  - IndexExpression
```
public IndexExpression(int index,
                       int line,
                       int column)
```
- Method Detail
  - accept
```
public <T> T accept(ExpressionVisitor<T> visitor)
```
    Description copied from class: JmespathExpression
    
    Visits a node using a double-dispatch visitor.
    
    Specified by:
    
    accept in class JmespathExpression
    
    Type Parameters:
    
    T - Type of value the visitor returns.
    
    Parameters:
    
    visitor - Visitor to accept on the node.
    
    Returns:
    
    Returns the result of applying the visitor.
  - getIndex
```
public int getIndex()
```
    Gets the index to retrieve.
    
    Returns:
    
    Returns the index.
  - equals
```
public boolean equals(java.lang.Object o)
```
    Overrides:
    
    equals in class java.lang.Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class java.lang.Object
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object