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< div class = "header" >
< div class = "subTitle" > com.mxgraph.analysis< / div >
< h2 title = "Class mxGraphAnalysis" class = "title" > Class mxGraphAnalysis< / h2 >
< / div >
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< li > java.lang.Object< / li >
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< li > com.mxgraph.analysis.mxGraphAnalysis< / li >
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< pre > public class < span class = "typeNameLabel" > mxGraphAnalysis< / span >
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extends java.lang.Object< / pre >
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< div class = "block" > A singleton class that provides algorithms for graphs. Assume these
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variables for the following examples:< br >
< code >
mxICostFunction cf = mxDistanceCostFunction();
Object[] v = graph.getChildVertices(graph.getDefaultParent());
Object[] e = graph.getChildEdges(graph.getDefaultParent());
mxGraphAnalysis mga = mxGraphAnalysis.getInstance();
< / code >
< h3 > Shortest Path (Dijkstra)< / h3 >
For example, to find the shortest path between the first and the second
selected cell in a graph use the following code: < br >
< br >
< code > Object[] path = mga.getShortestPath(graph, from, to, cf, v.length, true);< / code >
< h3 > Minimum Spanning Tree< / h3 >
This algorithm finds the set of edges with the minimal length that connect
all vertices. This algorithm can be used as follows:
< h5 > Prim< / h5 >
< code > mga.getMinimumSpanningTree(graph, v, cf, true))< / code >
< h5 > Kruskal< / h5 >
< code > mga.getMinimumSpanningTree(graph, v, e, cf))< / code >
< h3 > Connection Components< / h3 >
The union find may be used as follows to determine whether two cells are
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connected: < code > boolean connected = uf.differ(vertex1, vertex2)< / code > .< / div >
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< dl >
< dt > < span class = "seeLabel" > See Also:< / span > < / dt >
< dd > < a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > < code > mxICostFunction< / code > < / a > < / dd >
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< th class = "colFirst" scope = "col" > Modifier and Type< / th >
< th class = "colLast" scope = "col" > Field and Description< / th >
< / tr >
< tr class = "altColor" >
< td class = "colFirst" > < code > protected static < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html" title = "class in com.mxgraph.analysis" > mxGraphAnalysis< / a > < / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#instance" > instance< / a > < / span > < / code >
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< div class = "block" > Holds the shared instance of this class.< / div >
< / td >
< / tr >
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< th class = "colLast" scope = "col" > Constructor and Description< / th >
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< td class = "colFirst" > < code > protected < / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#mxGraphAnalysis--" > mxGraphAnalysis< / a > < / span > ()< / code > < / td >
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< tr >
< th class = "colFirst" scope = "col" > Modifier and Type< / th >
< th class = "colLast" scope = "col" > Method and Description< / th >
< / tr >
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< tr id = "i0" class = "altColor" >
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< td class = "colFirst" > < code > protected < a href = "../../../com/mxgraph/analysis/mxFibonacciHeap.html" title = "class in com.mxgraph.analysis" > mxFibonacciHeap< / a > < / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#createPriorityQueue--" > createPriorityQueue< / a > < / span > ()< / code >
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< div class = "block" > Hook for subclassers to provide a custom fibonacci heap.< / div >
< / td >
< / tr >
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< tr id = "i1" class = "rowColor" >
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< td class = "colFirst" > < code > protected < a href = "../../../com/mxgraph/analysis/mxUnionFind.html" title = "class in com.mxgraph.analysis" > mxUnionFind< / a > < / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#createUnionFind-java.lang.Object:A-" > createUnionFind< / a > < / span > (java.lang.Object[] v)< / code >
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< div class = "block" > Hook for subclassers to provide a custom union find structure.< / div >
< / td >
< / tr >
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< tr id = "i2" class = "altColor" >
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< td class = "colFirst" > < code > < a href = "../../../com/mxgraph/analysis/mxUnionFind.html" title = "class in com.mxgraph.analysis" > mxUnionFind< / a > < / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#getConnectionComponents-com.mxgraph.view.mxGraph-java.lang.Object:A-java.lang.Object:A-" > getConnectionComponents< / a > < / span > (< a href = "../../../com/mxgraph/view/mxGraph.html" title = "class in com.mxgraph.view" > mxGraph< / a > graph,
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java.lang.Object[] v,
java.lang.Object[] e)< / code >
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< div class = "block" > Returns a union find structure representing the connection components of
G=(E,V).< / div >
< / td >
< / tr >
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< tr id = "i3" class = "rowColor" >
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< td class = "colFirst" > < code > static < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html" title = "class in com.mxgraph.analysis" > mxGraphAnalysis< / a > < / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#getInstance--" > getInstance< / a > < / span > ()< / code > < / td >
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< / tr >
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< tr id = "i4" class = "altColor" >
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< td class = "colFirst" > < code > java.lang.Object[]< / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#getMinimumSpanningTree-com.mxgraph.view.mxGraph-java.lang.Object:A-com.mxgraph.analysis.mxICostFunction-boolean-" > getMinimumSpanningTree< / a > < / span > (< a href = "../../../com/mxgraph/view/mxGraph.html" title = "class in com.mxgraph.view" > mxGraph< / a > graph,
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java.lang.Object[] v,
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< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf,
boolean directed)< / code >
< div class = "block" > Returns the minimum spanning tree (MST) for the graph defined by G=(E,V).< / div >
< / td >
< / tr >
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< tr id = "i5" class = "rowColor" >
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< td class = "colFirst" > < code > java.lang.Object[]< / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#getMinimumSpanningTree-com.mxgraph.view.mxGraph-java.lang.Object:A-java.lang.Object:A-com.mxgraph.analysis.mxICostFunction-" > getMinimumSpanningTree< / a > < / span > (< a href = "../../../com/mxgraph/view/mxGraph.html" title = "class in com.mxgraph.view" > mxGraph< / a > graph,
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java.lang.Object[] v,
java.lang.Object[] e,
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< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf)< / code >
< div class = "block" > Returns the minimum spanning tree (MST) for the graph defined by G=(E,V).< / div >
< / td >
< / tr >
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< tr id = "i6" class = "altColor" >
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< td class = "colFirst" > < code > java.lang.Object[]< / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#getShortestPath-com.mxgraph.view.mxGraph-java.lang.Object-java.lang.Object-com.mxgraph.analysis.mxICostFunction-int-boolean-" > getShortestPath< / a > < / span > (< a href = "../../../com/mxgraph/view/mxGraph.html" title = "class in com.mxgraph.view" > mxGraph< / a > graph,
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java.lang.Object from,
java.lang.Object to,
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< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf,
int steps,
boolean directed)< / code >
< div class = "block" > Returns the shortest path between two cells or their descendants
represented as an array of edges in order of traversal.< / div >
< / td >
< / tr >
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< tr id = "i7" class = "rowColor" >
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< td class = "colFirst" > < code > static void< / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#setInstance-com.mxgraph.analysis.mxGraphAnalysis-" > setInstance< / a > < / span > (< a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html" title = "class in com.mxgraph.analysis" > mxGraphAnalysis< / a > instance)< / code >
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< div class = "block" > Sets the shared instance of this class.< / div >
< / td >
< / tr >
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< tr id = "i8" class = "altColor" >
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< td class = "colFirst" > < code > < a href = "../../../com/mxgraph/view/mxCellState.html" title = "class in com.mxgraph.view" > mxCellState< / a > []< / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#sort-com.mxgraph.view.mxCellState:A-com.mxgraph.analysis.mxICostFunction-" > sort< / a > < / span > (< a href = "../../../com/mxgraph/view/mxCellState.html" title = "class in com.mxgraph.view" > mxCellState< / a > [] states,
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< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf)< / code >
< div class = "block" > Returns a sorted set for < code > cells< / code > with respect to
< code > cf< / code > .< / div >
< / td >
< / tr >
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< tr id = "i9" class = "rowColor" >
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< td class = "colFirst" > < code > double< / code > < / td >
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< td class = "colLast" > < code > < span class = "memberNameLink" > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#sum-com.mxgraph.view.mxCellState:A-com.mxgraph.analysis.mxICostFunction-" > sum< / a > < / span > (< a href = "../../../com/mxgraph/view/mxCellState.html" title = "class in com.mxgraph.view" > mxCellState< / a > [] states,
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< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf)< / code >
< div class = "block" > Returns the sum of all cost for < code > cells< / code > with respect to
< code > cf< / code > .< / div >
< / td >
< / tr >
< / table >
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< h3 > Methods inherited from class java.lang.Object< / h3 >
< code > clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait< / code > < / li >
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< h4 > instance< / h4 >
< pre > protected static < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html" title = "class in com.mxgraph.analysis" > mxGraphAnalysis< / a > instance< / pre >
< div class = "block" > Holds the shared instance of this class.< / div >
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< h3 > Constructor Detail< / h3 >
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< a name = "mxGraphAnalysis--" >
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< pre > protected mxGraphAnalysis()< / pre >
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< pre > public static < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html" title = "class in com.mxgraph.analysis" > mxGraphAnalysis< / a > getInstance()< / pre >
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< dl >
< dt > < span class = "returnLabel" > Returns:< / span > < / dt >
< dd > Returns the sharedInstance.< / dd >
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< h4 > setInstance< / h4 >
< pre > public static void setInstance(< a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html" title = "class in com.mxgraph.analysis" > mxGraphAnalysis< / a > instance)< / pre >
< div class = "block" > Sets the shared instance of this class.< / div >
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< dl >
< dt > < span class = "paramLabel" > Parameters:< / span > < / dt >
< dd > < code > instance< / code > - The instance to set.< / dd >
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< a name = "getShortestPath-com.mxgraph.view.mxGraph-java.lang.Object-java.lang.Object-com.mxgraph.analysis.mxICostFunction-int-boolean-" >
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< h4 > getShortestPath< / h4 >
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< pre > public java.lang.Object[] getShortestPath(< a href = "../../../com/mxgraph/view/mxGraph.html" title = "class in com.mxgraph.view" > mxGraph< / a > graph,
java.lang.Object from,
java.lang.Object to,
< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf,
int steps,
boolean directed)< / pre >
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< div class = "block" > Returns the shortest path between two cells or their descendants
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represented as an array of edges in order of traversal. < br >
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This implementation is based on the Dijkstra algorithm.< / div >
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< dl >
< dt > < span class = "paramLabel" > Parameters:< / span > < / dt >
< dd > < code > graph< / code > - The object that defines the graph structure< / dd >
< dd > < code > from< / code > - The source cell.< / dd >
< dd > < code > to< / code > - The target cell (aka sink).< / dd >
< dd > < code > cf< / code > - The cost function that defines the edge length.< / dd >
< dd > < code > steps< / code > - The maximum number of edges to traverse.< / dd >
< dd > < code > directed< / code > - If edge directions should be taken into account.< / dd >
< dt > < span class = "returnLabel" > Returns:< / span > < / dt >
< dd > Returns the shortest path as an alternating array of vertices
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and edges, starting with < code > from< / code > and ending with
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< code > to< / code > .< / dd >
< dt > < span class = "seeLabel" > See Also:< / span > < / dt >
< dd > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#createPriorityQueue--" > < code > createPriorityQueue()< / code > < / a > < / dd >
< / dl >
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< / li >
< / ul >
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< a name = "getMinimumSpanningTree-com.mxgraph.view.mxGraph-java.lang.Object:A-com.mxgraph.analysis.mxICostFunction-boolean-" >
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< h4 > getMinimumSpanningTree< / h4 >
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< pre > public java.lang.Object[] getMinimumSpanningTree(< a href = "../../../com/mxgraph/view/mxGraph.html" title = "class in com.mxgraph.view" > mxGraph< / a > graph,
java.lang.Object[] v,
< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf,
boolean directed)< / pre >
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< div class = "block" > Returns the minimum spanning tree (MST) for the graph defined by G=(E,V).
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The MST is defined as the set of all vertices with minimal lengths that
forms no cycles in G.< br >
This implementation is based on the algorihm by Prim-Jarnik. It uses
O(|E|+|V|log|V|) time when used with a Fibonacci heap and a graph whith a
double linked-list datastructure, as is the case with the default
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implementation.< / div >
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< dl >
< dt > < span class = "paramLabel" > Parameters:< / span > < / dt >
< dd > < code > graph< / code > - the object that describes the graph< / dd >
< dd > < code > v< / code > - the vertices of the graph< / dd >
< dd > < code > cf< / code > - the cost function that defines the edge length< / dd >
< dt > < span class = "returnLabel" > Returns:< / span > < / dt >
< dd > Returns the MST as an array of edges< / dd >
< dt > < span class = "seeLabel" > See Also:< / span > < / dt >
< dd > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#createPriorityQueue--" > < code > createPriorityQueue()< / code > < / a > < / dd >
< / dl >
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< / ul >
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< a name = "getMinimumSpanningTree-com.mxgraph.view.mxGraph-java.lang.Object:A-java.lang.Object:A-com.mxgraph.analysis.mxICostFunction-" >
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< pre > public java.lang.Object[] getMinimumSpanningTree(< a href = "../../../com/mxgraph/view/mxGraph.html" title = "class in com.mxgraph.view" > mxGraph< / a > graph,
java.lang.Object[] v,
java.lang.Object[] e,
< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf)< / pre >
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< div class = "block" > Returns the minimum spanning tree (MST) for the graph defined by G=(E,V).
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The MST is defined as the set of all vertices with minimal lenths that
forms no cycles in G.< br >
This implementation is based on the algorihm by Kruskal. It uses
O(|E|log|E|)=O(|E|log|V|) time for sorting the edges, O(|V|) create sets,
O(|E|) find and O(|V|) union calls on the union find structure, thus
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yielding no more than O(|E|log|V|) steps. For a faster implementatin< / div >
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< dl >
< dt > < span class = "paramLabel" > Parameters:< / span > < / dt >
< dd > < code > graph< / code > - The object that contains the graph.< / dd >
< dd > < code > v< / code > - The vertices of the graph.< / dd >
< dd > < code > e< / code > - The edges of the graph.< / dd >
< dd > < code > cf< / code > - The cost function that defines the edge length.< / dd >
< dt > < span class = "returnLabel" > Returns:< / span > < / dt >
< dd > Returns the MST as an array of edges.< / dd >
< dt > < span class = "seeLabel" > See Also:< / span > < / dt >
< dd > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#getMinimumSpanningTree-com.mxgraph.view.mxGraph-java.lang.Object:A-com.mxgraph.analysis.mxICostFunction-boolean-" > < code > getMinimumSpanningTree(mxGraph, Object[], mxICostFunction,
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boolean)< / code > < / a > ,
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< a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#createUnionFind-java.lang.Object:A-" > < code > createUnionFind(Object[])< / code > < / a > < / dd >
< / dl >
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< / li >
< / ul >
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< a name = "getConnectionComponents-com.mxgraph.view.mxGraph-java.lang.Object:A-java.lang.Object:A-" >
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< h4 > getConnectionComponents< / h4 >
< pre > public < a href = "../../../com/mxgraph/analysis/mxUnionFind.html" title = "class in com.mxgraph.analysis" > mxUnionFind< / a > getConnectionComponents(< a href = "../../../com/mxgraph/view/mxGraph.html" title = "class in com.mxgraph.view" > mxGraph< / a > graph,
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java.lang.Object[] v,
java.lang.Object[] e)< / pre >
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< div class = "block" > Returns a union find structure representing the connection components of
G=(E,V).< / div >
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< dl >
< dt > < span class = "paramLabel" > Parameters:< / span > < / dt >
< dd > < code > graph< / code > - The object that contains the graph.< / dd >
< dd > < code > v< / code > - The vertices of the graph.< / dd >
< dd > < code > e< / code > - The edges of the graph.< / dd >
< dt > < span class = "returnLabel" > Returns:< / span > < / dt >
< dd > Returns the connection components in G=(E,V)< / dd >
< dt > < span class = "seeLabel" > See Also:< / span > < / dt >
< dd > < a href = "../../../com/mxgraph/analysis/mxGraphAnalysis.html#createUnionFind-java.lang.Object:A-" > < code > createUnionFind(Object[])< / code > < / a > < / dd >
< / dl >
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< / li >
< / ul >
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< a name = "sort-com.mxgraph.view.mxCellState:A-com.mxgraph.analysis.mxICostFunction-" >
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< h4 > sort< / h4 >
< pre > public < a href = "../../../com/mxgraph/view/mxCellState.html" title = "class in com.mxgraph.view" > mxCellState< / a > [] sort(< a href = "../../../com/mxgraph/view/mxCellState.html" title = "class in com.mxgraph.view" > mxCellState< / a > [] states,
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< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf)< / pre >
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< div class = "block" > Returns a sorted set for < code > cells< / code > with respect to
< code > cf< / code > .< / div >
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< dl >
< dt > < span class = "paramLabel" > Parameters:< / span > < / dt >
< dd > < code > states< / code > - the cell states to sort< / dd >
< dd > < code > cf< / code > - the cost function that defines the order< / dd >
< dt > < span class = "returnLabel" > Returns:< / span > < / dt >
< dd > Returns an ordered set of < code > cells< / code > wrt.
< code > cf< / code > < / dd >
< / dl >
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< / li >
< / ul >
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< a name = "sum-com.mxgraph.view.mxCellState:A-com.mxgraph.analysis.mxICostFunction-" >
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< h4 > sum< / h4 >
< pre > public double sum(< a href = "../../../com/mxgraph/view/mxCellState.html" title = "class in com.mxgraph.view" > mxCellState< / a > [] states,
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< a href = "../../../com/mxgraph/analysis/mxICostFunction.html" title = "interface in com.mxgraph.analysis" > mxICostFunction< / a > cf)< / pre >
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< div class = "block" > Returns the sum of all cost for < code > cells< / code > with respect to
< code > cf< / code > .< / div >
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< dl >
< dt > < span class = "paramLabel" > Parameters:< / span > < / dt >
< dd > < code > states< / code > - the cell states to use for the sum< / dd >
< dd > < code > cf< / code > - the cost function that defines the costs< / dd >
< dt > < span class = "returnLabel" > Returns:< / span > < / dt >
< dd > Returns the sum of all cell cost< / dd >
< / dl >
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< / li >
< / ul >
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< h4 > createUnionFind< / h4 >
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< pre > protected < a href = "../../../com/mxgraph/analysis/mxUnionFind.html" title = "class in com.mxgraph.analysis" > mxUnionFind< / a > createUnionFind(java.lang.Object[] v)< / pre >
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< div class = "block" > Hook for subclassers to provide a custom union find structure.< / div >
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< dl >
< dt > < span class = "paramLabel" > Parameters:< / span > < / dt >
< dd > < code > v< / code > - the array of all elements< / dd >
< dt > < span class = "returnLabel" > Returns:< / span > < / dt >
< dd > Returns a union find structure for < code > v< / code > < / dd >
< / dl >
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< / li >
< / ul >
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< h4 > createPriorityQueue< / h4 >
< pre > protected < a href = "../../../com/mxgraph/analysis/mxFibonacciHeap.html" title = "class in com.mxgraph.analysis" > mxFibonacciHeap< / a > createPriorityQueue()< / pre >
< div class = "block" > Hook for subclassers to provide a custom fibonacci heap.< / div >
< / li >
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< / li >
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< / div >
< / div >
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