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Docs For Class Structures_Graph_Node

Class Structures_Graph_Node

Description
Description | Methods (details)

The Structures_Graph_Node class represents a Node that can be member of a graph node set.

A graph node can contain data. Under this API, the node contains default data, and key index data. It behaves, thus, both as a regular data node, and as a dictionary (or associative array) node.

Regular data is accessed via getData and setData. Key indexed data is accessed via getMetadata and setMetadata.

Located in /Structures/Graph/Node.php (line 57) 


	
			






	
	

		
Method Summary

		

			Description |
									Methods (details)
		

		
			
			

								
				

											Structures_Graph_Node
										Structures_Graph_Node
										()
									

								
				

											boolean
										connectsTo
											(mixed &$target)
									

								
				

											void
										connectTo
											(Structures_Graph &$destinationNode)
									

								
				

											mixed
										&getData
										()
									

								
				

											Structures_Graph
										&getGraph
										()
									

								
				

											mixed
										&getMetadata
											(string $key, [boolean $nullIfNonexistent = false])
									

								
				

											array
										getNeighbours
										()
									

								
				

											integer
										inDegree
										()
									

								
				

											boolean
										metadataKeyExists
											(string $key)
									

								
				

											integer
										outDegree
										()
									

								
				

											mixed
										setData
											(mixed $data)
									

								
				

											void
										setGraph
											(Structures_Graph &$graph)
									

								
				

											void
										setMetadata
											(string $key, mixed $data)
									

								
				

											void
										unsetMetadata
											(string $key)
									

							

		

	
		

	
	
	

		
Methods

		

			Description |
													Methods (details)
						
		

		

			



	
	

		Constructor Structures_Graph_Node (line 78)
	
 
	
	

Constructor

	
    
				
  • access: public
    • 
			

	
	

		Structures_Graph_Node
		
			Structures_Graph_Node
		
				()
			

	
		
		
	




	
	

		connectsTo (line 275)
	
 
	
	

Test wether this node has an arc to the target node

	
    
				
  • return: True if the two nodes are connected
    • 
				
  • access: public
    • 
			

	
	

		boolean
		
			connectsTo
		
					(mixed &$target)
			

	
		
		
	




	
	

		connectTo (line 236)
	
 
	
	

Connect this node to another one.


If the graph is not directed, the reverse arc, connecting $destinationNode to $this is also created.

	
    
				
  • access: public
    • 
			

	
	

		void
		
			connectTo
		
					(Structures_Graph &$destinationNode)
			

	
			
		
		
	




	
	

		getData (line 119)
	
 
	
	

Node data getter.


Each graph node can contain a reference to one variable. This is the getter for that reference.

	
    
				
  • return: Data stored in node
    • 
				
  • access: public
    • 
			

	
	

		mixed
		
			&getData
		
				()
			

	
		
		
	




	
	

		getGraph (line 90)
	
 
	
	

Node graph getter

	
    
				
  • return: Graph where node is stored
    • 
				
  • access: public
    • 
			

	
	

		Structures_Graph
		
			&getGraph
		
				()
			

	
		
		
	




	
	

		getMetadata (line 171)
	
 
	
	

Node metadata getter


Each graph node can contain multiple 'metadata' entries, each stored under a different key, as in an  associative array or in a dictionary. This method gets the data under the given key. If the key does  not exist, an error will be thrown, so testing using metadataKeyExists might be needed.

	
	
	

		mixed
		
			&getMetadata
		
					(string $key, [boolean $nullIfNonexistent = false])
			

	
			
    
					
  • 
				string
				$key: Key			
    • 
					
  • 
				boolean
				$nullIfNonexistent: nullIfNonexistent (defaults to false).			
    • 
				

		
		
	




	
	

		getNeighbours (line 262)
	
 
	
	

Return nodes connected to this one.

	
    
				
  • return: Array of nodes
    • 
				
  • access: public
    • 
			

	
	

		array
		
			getNeighbours
		
				()
			

	
		
		
	




	
	

		inDegree (line 309)
	
 
	
	

Calculate the in degree of the node.


The indegree for a node is the number of arcs entering the node. For non directed graphs,  the indegree is equal to the outdegree.

	
    
				
  • return: In degree of the node
    • 
				
  • access: public
    • 
			

	
	

		integer
		
			inDegree
		
				()
			

	
		
		
	




	
	

		metadataKeyExists (line 151)
	
 
	
	

Test for existence of metadata under a given key.


Each graph node can contain multiple 'metadata' entries, each stored under a different key, as in an  associative array or in a dictionary. This method tests whether a given metadata key exists for this node.

	
    
				
  • access: public
    • 
			

	
	

		boolean
		
			metadataKeyExists
		
					(string $key)
			

	
			
    
					
  • 
				string
				$key: Key to test			
    • 
				

		
		
	




	
	

		outDegree (line 333)
	
 
	
	

Calculate the out degree of the node.


The outdegree for a node is the number of arcs exiting the node. For non directed graphs,  the outdegree is always equal to the indegree.

	
    
				
  • return: Out degree of the node
    • 
				
  • access: public
    • 
			

	
	

		integer
		
			outDegree
		
				()
			

	
		
		
	




	
	

		setData (line 134)
	
 
	
	

Node data setter


Each graph node can contain a reference to one variable. This is the setter for that reference.

	
    
				
  • return: Data to store in node
    • 
				
  • access: public
    • 
			

	
	

		mixed
		
			setData
		
					(mixed $data)
			

	
		
		
	




	
	

		setGraph (line 104)
	
 
	
	

Node graph setter. This method should not be called directly. Use Graph::addNode instead.

	
	
	

		void
		
			setGraph
		
					(Structures_Graph &$graph)
			

	
			
		
		
	




	
	

		setMetadata (line 214)
	
 
	
	

Node metadata setter


Each graph node can contain multiple 'metadata' entries, each stored under a different key, as in an  associative array or in a dictionary. This method stores data under the given key. If the key already exists,  previously stored data is discarded.

	
    
				
  • access: public
    • 
			

	
	

		void
		
			setMetadata
		
					(string $key, mixed $data)
			

	
			
    
					
  • 
				string
				$key: Key			
    • 
					
  • 
				mixed
				$data: Data			
    • 
				

		
		
	




	
	

		unsetMetadata (line 196)
	
 
	
	

Delete metadata by key


Each graph node can contain multiple 'metadata' entries, each stored under a different key, as in an  associative array or in a dictionary. This method removes any data that might be stored under the provided key.  If the key does not exist, no error is thrown, so it is safe using this method without testing for key existence.

	
    
				
  • access: public
    • 
			

	
	

		void
		
			unsetMetadata
		
					(string $key)
			

	
			
    
					
  • 
				string
				$key: Key			
    • 
				

		
		
	

						
		

	

	
	

		Documentation generated on Fri, 30 Jan 2004 16:37:29 +0000 by phpDocumentor 1.2.3
	

	





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