Enclosing interface:

VoltageLevel
```
public static interface VoltageLevel.NodeBreakerView
```
A node/breaker view of the topology.

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static interface`	`VoltageLevel.NodeBreakerView.InternalConnection`
`static interface`	`VoltageLevel.NodeBreakerView.InternalConnectionAdder`
`static interface`	`VoltageLevel.NodeBreakerView.SwitchAdder`
`static interface`	`VoltageLevel.NodeBreakerView.Traverser`

Method Summary

All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods
Modifier and Type	Method	Description
`BusbarSection`	`getBusbarSection(String id)`	Get a busbar section.
`int`	`getBusbarSectionCount()`	Get the busbar section count.
`Iterable<BusbarSection>`	`getBusbarSections()`	Get busbar sections.
`Stream<BusbarSection>`	`getBusbarSectionStream()`	Get busbar sections.
`int`	`getInternalConnectionCount()`	Get internal connection count.
`Iterable<VoltageLevel.NodeBreakerView.InternalConnection>`	`getInternalConnections()`	Get internal connections.
`Stream<VoltageLevel.NodeBreakerView.InternalConnection>`	`getInternalConnectionStream()`	Get internal connection stream.
`default int`	`getMaximumNodeIndex()`	Get the highest index of used nodes (i.e. attached to an equipment, a switch or an internal connection) in the voltage level.
`int`	`getNode1(String switchId)`	Get the first node to which a switch is connected.
`int`	`getNode2(String switchId)`	Get the second node to which a switch is connected.
`default int`	`getNodeCount()`	Deprecated. Use `getMaximumNodeIndex()` instead.
`int[]`	`getNodes()`	Get the list of nodes.
`default Optional<Terminal>`	`getOptionalTerminal(int node)`	Get the terminal corresponding to the {@param node} if the {@param node} is valid.
`Switch`	`getSwitch(String switchId)`	Get a switch.
`int`	`getSwitchCount()`	Get the switch count.
`Iterable<Switch>`	`getSwitches()`	Get switches.
`Stream<Switch>`	`getSwitchStream()`	Get switches.
`Terminal`	`getTerminal(int node)`	Get the terminal corresponding to the {@param node}.
`Terminal`	`getTerminal1(String switchId)`	Get the first terminal corresponding to the {@param switchId}.
`Terminal`	`getTerminal2(String switchId)`	Get the second terminal corresponding to the {@param switchId}.
`default boolean`	`hasAttachedEquipment(int node)`	Check if a `Connectable`, a `Switch` or an `VoltageLevel.NodeBreakerView.InternalConnection` is attached to the given node.
`VoltageLevel.NodeBreakerView.SwitchAdder`	`newBreaker()`	Get a builder to create a new breaker.
`BusbarSectionAdder`	`newBusbarSection()`	Get a builder to create a new busbar section.
`VoltageLevel.NodeBreakerView.SwitchAdder`	`newDisconnector()`	Get a builder to create a new disconnector.
`VoltageLevel.NodeBreakerView.InternalConnectionAdder`	`newInternalConnection()`	Get a builder to create a new switch.
`VoltageLevel.NodeBreakerView.SwitchAdder`	`newSwitch()`	Get a builder to create a new switch.
`default void`	`removeInternalConnections(int node1, int node2)`	Remove all the internal connections between node1 and node2 (not orientated) if they exist.
`void`	`removeSwitch(String switchId)`	Remove a switch.
`void`	`traverse(int node, VoltageLevel.NodeBreakerView.Traverser traverser)`	Performs a depth-first traversal of the topology graph, starting from {@param node}.

- Method Detail
  - getNodeCount
```
@Deprecated
default int getNodeCount()
```
    Deprecated.
    Use getMaximumNodeIndex() instead.
    
    Get the count of used nodes (nodes attached to an equipment, a switch or an internal connection).
  - getMaximumNodeIndex
```
default int getMaximumNodeIndex()
```
    Get the highest index of used nodes (i.e. attached to an equipment, a switch or an internal connection) in the voltage level.
  - getNodes
```
int[] getNodes()
```
    Get the list of nodes.
  - newSwitch
```
VoltageLevel.NodeBreakerView.SwitchAdder newSwitch()
```
    Get a builder to create a new switch.
  - newInternalConnection
```
VoltageLevel.NodeBreakerView.InternalConnectionAdder newInternalConnection()
```
    Get a builder to create a new switch.
  - getInternalConnectionCount
```
int getInternalConnectionCount()
```
    Get internal connection count.
  - getInternalConnections
```
Iterable<VoltageLevel.NodeBreakerView.InternalConnection> getInternalConnections()
```
    Get internal connections.
  - getInternalConnectionStream
```
Stream<VoltageLevel.NodeBreakerView.InternalConnection> getInternalConnectionStream()
```
    Get internal connection stream.
  - removeInternalConnections
```
default void removeInternalConnections(int node1,
                                       int node2)
```
    Remove all the internal connections between node1 and node2 (not orientated) if they exist.
  - newBreaker
```
VoltageLevel.NodeBreakerView.SwitchAdder newBreaker()
```
    Get a builder to create a new breaker.
  - newDisconnector
```
VoltageLevel.NodeBreakerView.SwitchAdder newDisconnector()
```
    Get a builder to create a new disconnector.
  - getNode1
```
int getNode1(String switchId)
```
    Get the first node to which a switch is connected.
    
    Parameters:
    
    switchId - the id of the switch
    
    Throws:
    
    PowsyblException - if switch is not found
  - getNode2
```
int getNode2(String switchId)
```
    Get the second node to which a switch is connected.
    
    Parameters:
    
    switchId - the id of the switch
    
    Throws:
    
    PowsyblException - if switch is not found
  - getTerminal
```
Terminal getTerminal(int node)
```
    Get the terminal corresponding to the {@param node}.
    
    Throws:
    
    PowsyblException - if node is not found.
  - getOptionalTerminal
```
default Optional<Terminal> getOptionalTerminal(int node)
```
    Get the terminal corresponding to the {@param node} if the {@param node} is valid. Return an empty optional if no existing terminal corresponds to {@param node}.
    
    Throws:
    
    PowsyblException - if node is not valid.
  - hasAttachedEquipment
```
default boolean hasAttachedEquipment(int node)
```
    Check if a Connectable, a Switch or an VoltageLevel.NodeBreakerView.InternalConnection is attached to the given node.
    
    Throws:
    
    PowsyblException - if node is not valid
  - getTerminal1
```
Terminal getTerminal1(String switchId)
```
    Get the first terminal corresponding to the {@param switchId}. May return null.
    
    Throws:
    
    PowsyblException - if switch is not found.
  - getTerminal2
```
Terminal getTerminal2(String switchId)
```
    Get the second terminal corresponding to the {@param switchId}. May return null.
    
    Throws:
    
    PowsyblException - if switch is not found.
  - getSwitch
```
Switch getSwitch(String switchId)
```
    Get a switch.
    
    Parameters:
    
    switchId - the id the switch
    
    Returns:
    
    the switch or null if not found
  - getSwitches
```
Iterable<Switch> getSwitches()
```
    Get switches.
  - getSwitchStream
```
Stream<Switch> getSwitchStream()
```
    Get switches.
  - getSwitchCount
```
int getSwitchCount()
```
    Get the switch count.
  - removeSwitch
```
void removeSwitch(String switchId)
```
    Remove a switch.
    
    Parameters:
    
    switchId - the switch id
  - newBusbarSection
```
BusbarSectionAdder newBusbarSection()
```
    Get a builder to create a new busbar section.
  - getBusbarSections
```
Iterable<BusbarSection> getBusbarSections()
```
    Get busbar sections.
  - getBusbarSectionStream
```
Stream<BusbarSection> getBusbarSectionStream()
```
    Get busbar sections.
  - getBusbarSectionCount
```
int getBusbarSectionCount()
```
    Get the busbar section count.
  - getBusbarSection
```
BusbarSection getBusbarSection(String id)
```
    Get a busbar section.
    
    Parameters:
    
    id - the id of the busbar section
  - traverse
```
void traverse(int node,
              VoltageLevel.NodeBreakerView.Traverser traverser)
```
    Performs a depth-first traversal of the topology graph, starting from {@param node}. The {@param traverser} callback is called every time an edge is traversed.

Interface VoltageLevel.NodeBreakerView

Nested Class Summary

Method Summary

Method Detail

getNodeCount

getMaximumNodeIndex

getNodes

newSwitch

newInternalConnection

getInternalConnectionCount

getInternalConnections

getInternalConnectionStream

removeInternalConnections

newBreaker

newDisconnector

getNode1

getNode2

getTerminal

getOptionalTerminal

hasAttachedEquipment

getTerminal1

getTerminal2

getSwitch

getSwitches

getSwitchStream

getSwitchCount

removeSwitch

newBusbarSection

getBusbarSections

getBusbarSectionStream

getBusbarSectionCount

getBusbarSection

traverse