Interface IPath
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Method Summary
All Methods Static Methods Instance Methods Abstract Methods Default Methods Deprecated Methods Modifier and Type Method Description IEdgeIter
edgeIter()
Get anEdgeIter
that iterate over the edges of the path.IntList
edges()
Get the edges forming this path.static IPath
findPath(IntGraph g, int source, int target)
Find a valid path from \(u\) to \(v\).IntGraph
graph()
Get the graph this path is defined on.default boolean
isCycle()
Check whether this path form a cycle.static boolean
isPath(IntGraph g, int source, int target, IntList edges)
Check whether the given edge list is a valid path in the given graph.static IntSet
reachableVertices(IntGraph g, int source)
Find all the vertices reachable from a given source vertex.static IntSet
reachableVertices(IntGraph g, IntIterator sources)
Find all the vertices reachable from a set of given source vertices.default Integer
source()
Deprecated.Please usesourceInt()
instead to avoid un/boxing.int
sourceInt()
Get the source vertex of the path.default Integer
target()
Deprecated.Please usetargetInt()
instead to avoid un/boxing.int
targetInt()
Get the target vertex of the path.static IPath
valueOf(IntGraph g, int source, int target, IntList edges)
Create a new path from an edge list, a source and a target vertices.IntList
vertices()
Get the vertices forming this path.
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Method Detail
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sourceInt
int sourceInt()
Get the source vertex of the path.If the returned vertex is the same as
targetInt()
, the represented path is actually a cycle.- Returns:
- the source vertex of the path.
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source
@Deprecated default Integer source()
Deprecated.Please usesourceInt()
instead to avoid un/boxing.Get the source vertex of the path.If the returned vertex is the same as
Path.target()
, the represented path is actually a cycle.
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targetInt
int targetInt()
Get the target vertex of the path.If the returned vertex is the same as
sourceInt()
, the represented path is actually a cycle.- Returns:
- the target vertex of the path.
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target
@Deprecated default Integer target()
Deprecated.Please usetargetInt()
instead to avoid un/boxing.Get the target vertex of the path.If the returned vertex is the same as
Path.source()
, the represented path is actually a cycle.
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isCycle
default boolean isCycle()
Description copied from interface:Path
Check whether this path form a cycle.A cycle is a path which start and ends at the same vertex.
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edgeIter
IEdgeIter edgeIter()
Description copied from interface:Path
Get anEdgeIter
that iterate over the edges of the path.
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edges
IntList edges()
Description copied from interface:Path
Get the edges forming this path.The path is defined as a list of edges \(e_1,e_2,\ldots\), where each target vertex of an edge \(e_i\) is the source vertex of the next edge \(e_{i+1}\).
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vertices
IntList vertices()
Description copied from interface:Path
Get the vertices forming this path.The path is defined as a list of edges \(e_1,e_2,\ldots\), where each target vertex of an edge \(e_i\) is the source vertex of the next edge \(e_{i+1}\). The list of vertices of this path is the vertices visited by this path, ordered by their visit order. If this path form a cycle, the vertices list size is the same as the edge list (it does not include the source vertex, which is also the target vertex, twice), otherwise it is greater by one.
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graph
IntGraph graph()
Description copied from interface:Path
Get the graph this path is defined on.
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valueOf
static IPath valueOf(IntGraph g, int source, int target, IntList edges)
Create a new path from an edge list, a source and a target vertices.The edges list passed to this function is used for the whole lifetime of the returned path. The list should not be modified after passed to this method, as it is not cloned.
Note that this function does not check whether the given edge list is a valid path in the given graph. To check for validity, use
isPath(IntGraph, int, int, IntList)
.- Parameters:
g
- the graphsource
- a source vertextarget
- a target vertexedges
- a list of edges that form a path from thesource
to thetarget
vertices in the- Returns:
- a new path
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isPath
static boolean isPath(IntGraph g, int source, int target, IntList edges)
Check whether the given edge list is a valid path in the given graph.A list of edges is a valid path in the graph if it is a list of edges \(e_1,e_2,\ldots\) where each target vertex of an edge \(e_i\) is the source vertex of the next edge \(e_{i+1}\). If the graph is undirected the definition of a 'source' and 'target' are interchangeable, and each pair of consecutive edges simply share an endpoint. In addition, the edge list must start with the
source
vertex and end with thetarget
vertex.- Parameters:
g
- a graphsource
- a source vertextarget
- a target vertexedges
- a list of edges that form a path from thesource
to thetarget
vertices in the graph.- Returns:
true
if the given edge list is a valid path in the given graph, elsefalse
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findPath
static IPath findPath(IntGraph g, int source, int target)
Find a valid path from \(u\) to \(v\).This function uses BFS, which will result in the shortest path in the number of edges.
- Parameters:
g
- a graphsource
- source vertextarget
- target vertex- Returns:
- a path from \(u\) to \(v\), or
null
if no such path was found
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reachableVertices
static IntSet reachableVertices(IntGraph g, int source)
Find all the vertices reachable from a given source vertex.- Parameters:
g
- a graphsource
- a source vertex- Returns:
- a set of all the vertices reachable from the given source vertex
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reachableVertices
static IntSet reachableVertices(IntGraph g, IntIterator sources)
Find all the vertices reachable from a set of given source vertices.- Parameters:
g
- a graphsources
- a set of source vertices- Returns:
- a set of all the vertices reachable from the given source vertices
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