NumberOfNodes

All Implemented Interfaces:: it.unibo.alchemist.boundary.Extractor


public final class NumberOfNodes
 implements Extractor<Int>

Logs the number of nodes in the scenario.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description
`private final List<String>`	`columnNames`

Constructor Summary

Constructors
Constructor	Description
`NumberOfNodes()`

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`List<String>`	`getColumnNames()`
`<T extends Any> Map<String, Integer>`	`extractData(Environment<T, ?> environment, Actionable<T> reaction, Time time, Long step)`	Extracts properties from an environment.

Methods inherited from class it.unibo.alchemist.boundary.Extractor
extractDataAsText
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NumberOfNodes
```
NumberOfNodes()
```
- Method Detail
  - getColumnNames
```
 List<String> getColumnNames()
```
    Returns:
    
    the name of the properties that this Extractor can provide
  - extractData
```
 <T extends Any> Map<String, Integer> extractData(Environment<T, ?> environment, Actionable<T> reaction, Time time, Long step)
```
    Extracts properties from an environment. The returned map must either:
    contain a single element,
    have the keys matching columnNames, or
    be iterable in predictable order (namely, implement SortedMap or extend one of LinkedHashMap or ConcurrentLinkedHashMap).
    Parameters:
    
    environment -
    the {@link Environment}
    
    reaction -
    the last executed {@link Reaction}
    
    time -
    the current {@link Time}
    
    step -
    the simulation step
    
    Returns:
    
    the extracted properties with their names. The returned map must either: - contain a single element, - have the keys matching columnNames, or - be iterable in predictable order (namely, implement SortedMap or extend LinkedHashMap).