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1
32
33 package com.jeantessier.dependency;
34
35 import java.util.*;
36
37 public class TransitiveClosureEngine {
38 private NodeFactory factory;
39 private ClosureLayerSelector layerSelector;
40 private ClosureStopSelector stopSelector;
41
42 private Collection coverage = new HashSet();
43 private LinkedList selections = new LinkedList();
44 private LinkedList layers = new LinkedList();
45
46 public TransitiveClosureEngine(Collection packages, SelectionCriteria startCriteria, SelectionCriteria stopCriteria, ClosureLayerSelector layerSelector) {
47 this(new NodeFactory(), packages, startCriteria, stopCriteria, layerSelector);
48 }
49
50 public TransitiveClosureEngine(NodeFactory factory, Collection packages, SelectionCriteria startCriteria, SelectionCriteria stopCriteria, ClosureLayerSelector layerSelector) {
51 this.factory = factory;
52
53 this.layerSelector = layerSelector;
54 this.layerSelector.setFactory(factory);
55 this.layerSelector.setCoverage(coverage);
56
57 this.stopSelector = new ClosureStopSelector(stopCriteria);
58
59 init(packages, startCriteria);
60 }
61
62 private void init(Collection packages, SelectionCriteria startCriteria) {
63 ClosureStartSelector startSelector = new ClosureStartSelector(factory, startCriteria);
64 startSelector.traverseNodes(packages);
65 stopSelector.traverseNodes(startSelector.getCopiedNodes());
66 gatherResults(startSelector);
67 }
68
69 public NodeFactory getFactory() {
70 return factory;
71 }
72
73 public int getNbLayers() {
74 return layers.size();
75 }
76
77 public Collection getLayer(int i) {
78 return (Collection) layers.get(i);
79 }
80
81 public void computeAllLayers() {
82 while (!stopSelector.isDone()) {
83 computeNextLayer();
84 }
85 }
86
87 public void computeLayers(long nbLayers) {
88 for (long i=0; !stopSelector.isDone() && i<nbLayers; i++) {
89 computeNextLayer();
90 }
91 }
92
93 public void computeNextLayer() {
94 if (!stopSelector.isDone()) {
95 layerSelector.reset();
96 layerSelector.traverseNodes((Collection) selections.getLast());
97
98 stopSelector.traverseNodes(layerSelector.getCopiedNodes());
99 if (!layerSelector.getCopiedNodes().isEmpty()) {
100 gatherResults(layerSelector);
101 }
102 }
103 }
104
105 private void gatherResults(ClosureSelector selector) {
106 coverage.addAll(selector.getSelectedNodes());
107 selections.add(selector.getSelectedNodes());
108 layers.add(selector.getCopiedNodes());
109 }
110 }
111 |
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