FieldFromArray (Flink : Streaming Java 2.2.0 API)

java.lang.Object
- org.apache.flink.streaming.api.functions.windowing.delta.extractor.FieldFromArray<OUT>

Type Parameters:

OUT - The type of the extracted field.

All Implemented Interfaces:

Serializable, Extractor<Object,OUT>
```
@Internal
public class FieldFromArray<OUT>
extends Object
implements Extractor<Object,OUT>
```
Extracts a single field out of an array.

See Also:

Serialized Form

- Constructor Summary
  
  Constructors
  Constructor Description
  
  FieldFromArray()
  Extracts the first field (id 0) from the array.
  
  FieldFromArray(int fieldId)
  Extracts the field with the given id from the array.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  OUT extract(Object in)
  Extracts/Converts the given input to an object of the output type.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FieldFromArray
```
public FieldFromArray()
```
    Extracts the first field (id 0) from the array.
  - FieldFromArray
```
public FieldFromArray(int fieldId)
```
    Extracts the field with the given id from the array.
    
    Parameters:
    
    fieldId - The id of the field which will be extracted from the array.
- Method Detail
  - extract
```
public OUT extract(Object in)
```
    Description copied from interface: Extractor
    
    Extracts/Converts the given input to an object of the output type.
    
    Specified by:
    
    extract in interface Extractor<Object,OUT>
    
    Parameters:
    
    in - the input data
    
    Returns:
    
    the extracted/converted data