source: fedd/abac-src/rbtm/engine/old/OldProofNode.java1 @ 4adc697

version-1.30
Last change on this file since 4adc697 was 8780cbec, checked in by Jay Jacobs <Jay.Jacobs@…>, 15 years ago

ABAC sources from Cobham

  • Property mode set to 100644
File size: 2.6 KB
Line 
1    public class ProofNode
2    {
3        EntityExpression  roleExp;    // What EntityExpression this node is about
4        SolutionManager forwardMgr = new SolutionManager();
5        SolutionManager backwardMgr = new SolutionManager();
6
7        ProofNode (EntityExpression re) {
8            debugInfo("A new node is created for " + re);
9            roleExp = re;
10            forwardMgr.solutionAdded(this, roleExp);
11            backwardMgr.solutionAdded(this, roleExp);
12        }
13
14        // The method that does the work when we visit a node
15        void forwardProcess() {
16            // first go over all credentials that have this as subject
17            Iterator  credIt = findCredentialsBySubject(roleExp);
18            while (credIt.hasNext()) {
19                StaticCredential credential = (StaticCredential) credIt.next();
20                ProofNode node = addForwardNode(credential.getDefinedRole());
21                addProofEdge(this, node, credential);
22            }
23        }
24
25        void backwardProcess() {
26        }
27
28        /**
29         * Class SolutionManager implements listener management and solution
30         * management.
31         */
32       class SolutionManager implements SolutionListener
33       {
34            private HashMap    solutions = new HashMap();
35            private LinkedList listeners = new LinkedList();
36
37            public void solutionAdded(ProofNode s, ProofSolution r) {
38                debugInfo("Solution added: " + roleExp + "; " + s.roleExp + "; " + r);
39                if (! solutions.containsKey(r)) {   // when solution r is new
40                    solutions.put(r, new SmallSet(s));  // add solution together with source
41                    Object[] lisArray = listeners.toArray();    // inform all listeners
42                    for (int i=0; i<lisArray.length; i++) {
43                        ((SolutionListener)lisArray[i]).solutionAdded(ProofNode.this, r);
44                    }
45                } else if (trackAll) {
46                    ((SmallSet)solutions.get(r)).add(s);
47                }
48            }
49
50            void addListener(SolutionListener sl) {
51                listeners.add(sl);
52                // inform the listener of existing solutions
53                Object[] sols = solutions.keySet().toArray(); 
54                for (int i=0; i<sols.length; i++) {
55                     sl.solutionAdded(ProofNode.this, (EntityExpression)(sols[i]));
56                }
57            }
58
59            Set getSolutions()     {  return solutions.keySet();     }
60        } // End of class SolutionManager
61    } // End of class ProofNode
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