/**
* create new Vertices instance
*
* You can pass in just about anything that can be expressed as a Set of
* Vertices, such as:
* - an array of Vertex instances
* - any Algorithm that implements the VerticesAggregate interface
* - a Graph instance or
* - an existing Set of Vertices which will be returned as-is
*
* @param array|Vertices|VerticesAggregate $vertices
* @return Vertices
*/
public static function factory($vertices)
{
if ($vertices instanceof VerticesAggregate) {
return $vertices->getVertices();
}
return new self($vertices);
}
public function testGraphTree()
{
$graph = $this->createGraphTree();
$root = $graph->getVertices()->getVertexFirst();
$nonRoot = $graph->getVertices()->getMap();
unset($nonRoot[$root->getId()]);
$nonRoot = new Vertices($nonRoot);
$c1 = $nonRoot->getVertexFirst();
$tree = $this->createTreeAlg($graph);
$this->assertTrue($tree->isTree());
$this->assertSame($root, $tree->getVertexRoot());
$this->assertSame($graph->getVertices()->getVector(), $tree->getVerticesSubtree($root)->getVector());
$this->assertSame($nonRoot->getVector(), $tree->getVerticesChildren($root)->getVector());
$this->assertSame($nonRoot->getVector(), $tree->getVerticesDescendant($root)->getVector());
$this->assertSame($nonRoot->getVector(), $tree->getVerticesLeaf()->getVector());
$this->assertSame(array(), $tree->getVerticesInternal()->getVector());
$this->assertSame($root, $tree->getVertexParent($c1));
$this->assertSame(array(), $tree->getVerticesChildren($c1)->getVector());
$this->assertSame(array(), $tree->getVerticesDescendant($c1)->getVector());
$this->assertSame(array($c1), $tree->getVerticesSubtree($c1)->getVector());
$this->assertEquals(2, $tree->getDegree());
$this->assertEquals(0, $tree->getDepthVertex($root));
$this->assertEquals(1, $tree->getDepthVertex($c1));
$this->assertEquals(1, $tree->getHeight());
$this->assertEquals(1, $tree->getHeightVertex($root));
$this->assertEquals(0, $tree->getHeightvertex($c1));
return $tree;
}
/**
* Outputs a file of the visited tables in order
*
* @param Vertices $vertices
*/
protected function outputVertices(Vertices $vertices)
{
if (!$this->exportConstraints) {
return;
}
$path = $this->fileFactory->getPathForFile('constraints', 'txt');
$this->logger->info('Outputting constraint text to {path}', ['path' => $path]);
file_put_contents($path, implode("\n", $vertices->getIds()));
}
public function testFactoryEmptyArray()
{
$vertices = Vertices::factory(array());
$this->assertInstanceOf('Fhaculty\\Graph\\Set\\Vertices', $vertices);
$this->assertTrue($vertices->isEmpty());
}
/**
* create a new clone/copy of this graph - copy all attributes and given vertices and its edges
*
* @param Vertices $vertices set of vertices to keep
* @return Graph
* @uses Graph::createGraphClone() to create a complete clone
* @uses Vertex::destroy() to remove unneeded vertices again
*/
public function createGraphCloneVertices($vertices)
{
$verticesKeep = Vertices::factory($vertices);
$graph = $this->createGraphClone();
foreach ($graph->getVertices()->getMap() as $vid => $vertex) {
if (!$verticesKeep->hasVertexId($vid)) {
$vertex->destroy();
}
}
return $graph;
}
/**
*
* @param Vertices $verticesTwo
* @param Vertices $verticesEmpty
* @depends testTwo
* @depends testEmpty
*/
public function testTwoIntersectionEmpty(Vertices $verticesTwo, Vertices $verticesEmpty)
{
$verticesIntersection = $verticesTwo->getVerticesIntersection($verticesEmpty);
$this->assertCount(0, $verticesIntersection);
}
/**
* get alternating sequence of vertex, edge, vertex, edge, ..., vertex
*
* @return array
*/
public function getAlternatingSequence()
{
$edges = $this->edges->getVector();
$vertices = $this->vertices->getVector();
$ret = array();
for ($i = 0, $l = count($this->edges); $i < $l; ++$i) {
$ret[] = $vertices[$i];
$ret[] = $edges[$i];
}
$ret[] = $vertices[$i];
return $ret;
}
