Greedy colouring for decomposition trees of interval graphs and tests #34
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PhoenixIra
added
Coloring
| */ | ||
| protected Iterable<List<V>> getVertexOrdering() | ||
| { | ||
| System.out.println((Iterable<List<V>>) graph.vertexSet()); |
| /** | ||
| * The input graph | ||
| */ | ||
| private Graph<List<V>, E> graph; |
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Currently we do not use List as the vertex set, since Lists are not really efficient for set structures and using empty lists for the leaves/roots would break the tree structure. Instead we use Graph<Integer, E> and Map<Integer,Set>. Could you change this in your implementation?
| for(List<V> outerVertex:getVertexOrdering() ) { | ||
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| //the case of a generalised decomposition tree | ||
| /* for (E edge: graph.edgesOf(outerVertex)) { |
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Do you need this code? If not, remove it. If yes, remove it and if you will need it, use this commit to get the code.
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Yes, you are right. I do not need it.
| int maxColourAssigned = Collections.max(asssignedColors.values()); | ||
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| System.out.println(Arrays.asList(asssignedColors)); |
| Coloring<Integer> coloring = new DecompositionTreeColour<>(newGraph).getColoring(); | ||
| assertEquals(3, coloring.getNumberColors()); | ||
| Map<Integer, Integer> colors = coloring.getColors(); | ||
| assertEquals(0, colors.get(1).intValue()); |
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You should not assume the color here. Instead test whether vertices differ in they color or have the same color, so that if in a future commit, the algorithm get changed and results another (valid i.e. by renaming) coloring, this tests will also accept the result.
| Coloring<Integer> coloring = new DecompositionTreeColour<>(newGraph).getColoring(); | ||
| assertEquals(3, coloring.getNumberColors()); | ||
| Map<Integer, Integer> colors = coloring.getColors(); | ||
| assertEquals(0, colors.get(1).intValue()); |
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It would be good to move this into the color package |
dia007
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dia007
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Changed the parameters and incorporated minor changes