- com.google.common.graph.EndpointPair<N>

All Implemented Interfaces:

<N>
```
@Beta
(="N")
public abstract class EndpointPair<N>
extends 
implements <N>
```
An immutable pair representing the two endpoints of an edge in a graph. The EndpointPair of a directed edge is an ordered pair of nodes (source() and target()). The EndpointPair of an undirected edge is an unordered pair of nodes (nodeU() and nodeV()).
The edge is a self-loop if, and only if, the two endpoints are equal.

Since:

20.0

Author:

James Sexton

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`N`	`node)`	Returns the node that is adjacent to `node` along the origin edge.
`abstract boolean`	`obj)`	Two ordered `EndpointPair`s are equal if their `source()` and `target()` are equal.
`abstract int`	`hashCode()`	The hashcode of an ordered `EndpointPair` is equal to `Objects.hashCode(source(), target())`.
`abstract boolean`	`isOrdered()`	Returns `true` if this `EndpointPair` is an ordered pair (i.e.
`UnmodifiableIterator<N>`	`iterator()`	Iterates in the order `nodeU()`, `nodeV()`.
`N`	`nodeU()`	If this `EndpointPair` `isOrdered()` returns the `source()`; otherwise, returns an arbitrary (but consistent) endpoint of the origin edge.
`N`	`nodeV()`	Returns the node `adjacent` to `nodeU()` along the origin edge.
`static <N> EndpointPair<N>`	`ordered(N source, N target)`	Returns an `EndpointPair` representing the endpoints of a directed edge.
`abstract N`	`source()`	If this `EndpointPair` `isOrdered()`, returns the node which is the source.
`abstract N`	`target()`	If this `EndpointPair` `isOrdered()`, returns the node which is the target.
`static <N> EndpointPair<N>`	`unordered(N nodeU, N nodeV)`	Returns an `EndpointPair` representing the endpoints of an undirected edge.

Methods inherited from class java.lang.
, , , , , , , ,

Methods inherited from interface java.lang.
,

- Method Detail
  - ordered
```
public static <N> EndpointPair<N> ordered(N source,
                                          N target)
```
    Returns an EndpointPair representing the endpoints of a directed edge.
  - unordered
```
public static <N> EndpointPair<N> unordered(N nodeU,
                                            N nodeV)
```
    Returns an EndpointPair representing the endpoints of an undirected edge.
  - source
```
public abstract N source()
```
    If this EndpointPair isOrdered(), returns the node which is the source.
    
    Throws:
    
    - if this EndpointPair is not ordered
  - target
```
public abstract N target()
```
    If this EndpointPair isOrdered(), returns the node which is the target.
    
    Throws:
    
    - if this EndpointPair is not ordered
  - nodeU
```
public final N nodeU()
```
    If this EndpointPair isOrdered() returns the source(); otherwise, returns an arbitrary (but consistent) endpoint of the origin edge.
  - nodeV
```
public final N nodeV()
```
    Returns the node adjacent to nodeU() along the origin edge. If this EndpointPair isOrdered(), this is equal to target().
  - adjacentNode
```
public final  node)
```
    Returns the node that is adjacent to node along the origin edge.
    
    Throws:
    
    - if this EndpointPair does not contain node
  - isOrdered
```
public abstract boolean isOrdered()
```
    Returns true if this EndpointPair is an ordered pair (i.e. represents the endpoints of a directed edge).
  - iterator
```
public final UnmodifiableIterator<N> iterator()
```
    Iterates in the order nodeU(), nodeV().
    
    Specified by:
    
    in interface <N>
    
    Returns:
    
    an Iterator.
  - equals
```
public abstract boolean   obj)
```
    Two ordered EndpointPairs are equal if their source() and target() are equal. Two unordered EndpointPairs are equal if they contain the same nodes. An ordered EndpointPair is never equal to an unordered EndpointPair.
    
    Overrides:
    
    in class
    
    Parameters:
    
    obj - the reference object with which to compare.
    
    Returns:
    
    true if this object is the same as the obj argument; false otherwise.
    
    See Also:
    
    ,
  - hashCode
```
public abstract int hashCode()
```
    The hashcode of an ordered EndpointPair is equal to Objects.hashCode(source(), target()). The hashcode of an unordered EndpointPair is equal to nodeU().hashCode() + nodeV().hashCode().
    
    Overrides:
    
    in class
    
    Returns:
    
    a hash code value for this object.
    
    See Also:
    
    ,

Class EndpointPair<N>

Method Summary

Methods inherited from class java.lang.

Methods inherited from interface java.lang.

Method Detail

ordered

unordered

source

target

nodeU

nodeV

adjacentNode

isOrdered

iterator

equals

hashCode