+ MapList<Resource,Statement> subjectLeft = new MapList<Resource, Statement>();\r
+ MapList<Resource,Statement> subjectRight = new MapList<Resource, Statement>();\r
+ MapList<Resource,Statement> objectLeft = new MapList<Resource, Statement>();\r
+ MapList<Resource,Statement> objectRight = new MapList<Resource, Statement>();\r
+ \r
+ for (Statement s : unreliableLeft) {\r
+ subjectLeft.add(s.getSubject(),s);\r
+ objectLeft.add(s.getObject(),s);\r
+ }\r
+ for (Statement s : unreliableRight) {\r
+ subjectRight.add(s.getSubject(),s);\r
+ objectRight.add(s.getObject(),s);\r
+ }\r
+ \r
+ for (Resource ol : objectLeft.getKeys()) {\r
+\r
+ // all statements to the left side object\r
+ List<Statement> left = objectLeft.getValues(ol);\r
+ // all subjects that have statements to the left side object (ol)\r
+ Set<Resource> sLeft = new HashSet<Resource>();\r
+ // all matching subjects on the right side\r
+ Set<Resource> sRight = new HashSet<Resource>();\r
+ for (Statement s : left) {\r
+ sLeft.add(s.getSubject());\r
+ sRight.add(comparableResources.getRight(s.getSubject()));\r
+ }\r
+ // all objects that subjects on the right side point to. Object left has its matching resource among these, if it has matching resource\r
+ MapList<Resource,Statement> possibleOR = new MapList<Resource, Statement>();\r
+ for (Resource sr : sRight) {\r
+ for (Statement s : subjectRight.getValues(sr))\r
+ possibleOR.add(s.getObject(),s);\r
+ }\r
+ \r
+ // filter possible right side objects to those that have same amount of statements as the left side object\r
+ for (Resource or : possibleOR.getKeys().toArray(new Resource[possibleOR.getKeys().size()])) {\r
+ List<Statement> right = possibleOR.getValues(or);\r
+ if (right.size() != left.size())\r
+ possibleOR.remove(or);\r
+ \r
+ }\r
+ \r
+ // check for matching statements (comparable subjects, matching predicates)\r
+ MapList<Resource,Statement> matchingOR = new MapList<Resource, Statement>(); // list of objects that have matching statements\r
+ Map<Resource,Pair<int[], int[]>> matchingStatements = new HashMap<Resource, Pair<int[], int[]>>(); // matching statements\r
+ for (Resource or : possibleOR.getKeys()) {\r
+ List<Statement> right = possibleOR.getValues(or);\r
+ int iLeft[] = new int[left.size()];\r
+ int iRight[] = new int[right.size()];\r
+ \r
+ for (int i = 0; i < left.size(); i++) {\r
+ iLeft[i] = -1;\r
+ iRight[i] = -1;\r
+ }\r
+ \r
+ for (int l = 0; l < left.size(); l++) {\r
+ Statement ls = left.get(l);\r
+ for (int r = 0; r < right.size(); r++) {\r
+ if (iRight[r] >= 0)\r
+ continue;\r
+ Statement rs = right.get(r);\r
+ if (!comparableResources.contains(ls.getSubject(), rs.getSubject()))\r
+ continue;\r
+ if (rcomp.compare(ls.getPredicate(),rs.getPredicate()) == 0) {\r
+ iLeft[l] = r;\r
+ iRight[r] = l;\r
+ break;\r
+ }\r
+ }\r
+ \r
+ }\r
+ boolean success = true;\r
+ for (int i = 0; i < left.size(); i++) {\r
+ if (iLeft[i] < 0) {\r
+ success = false;\r
+ break;\r
+ }\r
+ if (iRight[i] < 0) {\r
+ success = false;\r
+ break;\r
+ }\r
+ \r
+ }\r
+ if (success) {\r
+ for (Statement s : right) \r
+ matchingOR.add(or,s);\r
+ matchingStatements.put(or, new Pair<int[], int[]>(iLeft, iRight));\r
+ }\r
+ }\r
+ // if there is only one matching right side object, we have found a match \r
+ if (matchingOR.getKeySize() == 1) {\r
+ Resource or = matchingOR.getKeys().iterator().next();\r
+ List<Statement> right = matchingOR.getValues(or);\r
+ Pair<int[], int[]> indices = matchingStatements.get(or);\r
+ \r
+ comparableResources.map(ol, or);\r
+ for (int l = 0; l < left.size(); l++) {\r
+ int r = indices.first[l];\r
+ comparableStatements.map(left.get(l), right.get(r));\r
+ }\r
+ \r
+ }\r
+\r
+ }\r
+ \r
+ for (Statement s : unreliableLeft) {\r
+ if (!comparableStatements.containsLeft(s))\r
+ addDeletion(s);\r
+ }\r
+ for (Statement s : unreliableRight) {\r
+ if (!comparableStatements.containsRight(s))\r
+ addAddition(s);\r
+ }\r
+ \r
+ \r