private boolean isMetaProperty(Label type, ColumnNode alignmentColumnNode) {
// Check for the case of DataPropertyOfColumnLink and ColumnSubClassLink
boolean case1 =
(type.getUri().equals(DataPropertyOfColumnLink.getFixedLabel().getUri())
|| type.getUri().equals(ColumnSubClassLink.getFixedLabel().getUri()));
if (case1) return true;
Set<LabeledLink> incomingLinks =
alignment.getCurrentIncomingLinksToNode(alignmentColumnNode.getId());
if (incomingLinks != null && !incomingLinks.isEmpty()) {
LabeledLink incomingLink = incomingLinks.iterator().next();
if (incomingLink != null
&& (incomingLink instanceof ClassInstanceLink)
&& incomingLink.getKeyType().equals(LinkKeyInfo.UriOfInstance)) return true;
}
return false;
}
@Override
public void generateJson(String prefix, PrintWriter pw, VWorkspace vWorkspace) {
VWorksheet vWorksheet = vWorkspace.getViewFactory().getVWorksheetByWorksheetId(worksheetId);
List<String> hNodeIdList = new ArrayList<String>();
List<HNodePath> columns = vWorksheet.getColumns();
for (HNodePath path : columns) hNodeIdList.add(path.getLeaf().getId());
String alignmentId =
AlignmentManager.Instance()
.constructAlignmentId(vWorkspace.getWorkspace().getId(), vWorksheet.getWorksheetId());
JSONObject topObj = new JSONObject();
try {
topObj.put(
GenericJsonKeys.updateType.name(), AlignmentSVGVisualizationUpdate.class.getSimpleName());
topObj.put(JsonKeys.alignmentId.name(), alignmentId);
topObj.put(JsonKeys.worksheetId.name(), worksheetId);
// Using Mohsen's GraphUtils method for graph traversal
HashMap<Node, Integer> nodeHeightsMap = GraphUtil.levelingCyclicGraph(alignmentGraph);
HashMap<Node, Set<ColumnNode>> nodeCoverage =
GraphUtil.getNodesCoverage(alignmentGraph, nodeHeightsMap);
/** Identify the max height * */
int maxTreeHeight = 0;
for (Node node : nodeHeightsMap.keySet()) {
if (nodeHeightsMap.get(node) >= maxTreeHeight) {
maxTreeHeight = nodeHeightsMap.get(node);
}
}
/** * Add the nodes and the links from the Steiner tree ** */
List<String> hNodeIdsAdded = new ArrayList<String>();
JSONArray nodesArr = new JSONArray();
JSONArray linksArr = new JSONArray();
if (alignmentGraph != null && alignmentGraph.vertexSet().size() != 0) {
/** Add the nodes * */
Set<Node> nodes = alignmentGraph.vertexSet();
HashMap<Node, Integer> verticesIndex = new HashMap<Node, Integer>();
int nodesIndexcounter = 0;
for (Node node : nodes) {
/** Get info about the nodes that this node covers or sits above * */
int height = maxTreeHeight - nodeHeightsMap.get(node);
/** Add the hnode ids of the columns that this vertex covers * */
JSONArray hNodeIdsCoveredByVertex = new JSONArray();
for (Node v : nodeCoverage.get(node)) {
if (v instanceof ColumnNode) {
ColumnNode cNode = (ColumnNode) v;
hNodeIdsCoveredByVertex.put(cNode.getHNodeId());
}
}
String hNodeId = "";
/** Add the semantic type information * */
if (node instanceof ColumnNode) {
ColumnNode cNode = (ColumnNode) node;
hNodeId = cNode.getHNodeId();
hNodeIdsAdded.add(cNode.getHNodeId());
}
JSONObject nodeObj =
getNodeJsonObject(
node.getLocalId(),
node.getId(),
node.getType().name(),
height,
hNodeIdsCoveredByVertex,
hNodeId);
nodesArr.put(nodeObj);
verticesIndex.put(node, nodesIndexcounter++);
}
/** * Add the links ** */
Set<Link> links = alignmentGraph.edgeSet();
for (Link link : links) {
Node source = link.getSource();
Integer sourceIndex = verticesIndex.get(source);
Node target = link.getTarget();
Integer targetIndex = verticesIndex.get(target);
Set<Link> outEdges = alignmentGraph.outgoingEdgesOf(target);
if (sourceIndex == null || targetIndex == null) {
logger.error("Edge vertex index not found!");
continue;
}
JSONObject linkObj = new JSONObject();
linkObj.put(JsonKeys.source.name(), sourceIndex);
linkObj.put(JsonKeys.target.name(), targetIndex);
linkObj.put(JsonKeys.sourceNodeId.name(), source.getId());
linkObj.put(JsonKeys.targetNodeId.name(), target.getId());
linkObj.put(JsonKeys.label.name(), link.getLabel().getLocalName());
linkObj.put(JsonKeys.id.name(), link.getId() + "");
linkObj.put(JsonKeys.linkStatus.name(), link.getStatus().name());
linkObj.put(JsonKeys.linkUri.name(), link.getLabel().getUri());
if (target.getType() == NodeType.ColumnNode && outEdges.isEmpty()) {
linkObj.put(JsonKeys.linkType.name(), JsonValues.holderLink.name());
if (link.getKeyType() == LinkKeyInfo.PartOfKey)
linkObj.put(JsonKeys.label.name(), link.getLabel().getLocalName() + "*");
}
linksArr.put(linkObj);
if (link.getType() == LinkType.ClassInstanceLink
&& link.getKeyType() == LinkKeyInfo.PartOfKey
&& target instanceof ColumnNode) {
ColumnNode cNode = (ColumnNode) target;
// Add the holder vertex object and the link that attaches nodes to the columns
JSONArray hNodeIdsCoveredByVertex_holder = new JSONArray();
hNodeIdsCoveredByVertex_holder.put(cNode.getHNodeId());
JSONObject vertObj_holder =
getNodeJsonObject(
JsonValues.key.name(),
source.getId() + "_holder",
NodeType.ColumnNode.name(),
0,
hNodeIdsCoveredByVertex_holder,
cNode.getHNodeId());
nodesArr.put(vertObj_holder);
nodesIndexcounter++;
// Add the holder link
JSONObject linkObj_holder =
getLinkJsonObject(
JsonValues.key.name(),
"",
nodesIndexcounter,
nodesIndexcounter - 1,
"",
"",
"",
"");
linksArr.put(linkObj_holder);
}
if (link.getType() == LinkType.DataPropertyOfColumnLink) {
DataPropertyOfColumnLink dpLink = (DataPropertyOfColumnLink) link;
String startHNodeId = dpLink.getSpecializedColumnHNodeId();
// Get height of the class instance node
int height = maxTreeHeight - nodeHeightsMap.get(link.getSource());
// Add 2 more holder nodes
// Start node
JSONArray hNodeIdsCoveredByVertex_holder = new JSONArray();
hNodeIdsCoveredByVertex_holder.put(startHNodeId);
JSONObject startNode =
getNodeJsonObject(
"",
source.getId() + "_holder",
JsonValues.DataPropertyOfColumnHolder.name(),
height - 0.35,
hNodeIdsCoveredByVertex_holder,
startHNodeId);
nodesArr.put(startNode);
nodesIndexcounter++;
// End node
String endHNodeId = ((ColumnNode) link.getTarget()).getHNodeId();
JSONArray hNodeIdsCoveredByVertex_holder_2 = new JSONArray();
hNodeIdsCoveredByVertex_holder_2.put(endHNodeId);
JSONObject endNode =
getNodeJsonObject(
"",
target.getId() + "_holder",
JsonValues.DataPropertyOfColumnHolder.name(),
height - 0.35,
hNodeIdsCoveredByVertex_holder_2,
endHNodeId);
nodesArr.put(endNode);
nodesIndexcounter++;
// Add the horizontal link
JSONObject linkObj_holder =
getLinkJsonObject(
"",
"",
nodesIndexcounter - 2,
nodesIndexcounter - 1,
JsonValues.horizontalDataPropertyLink.name(),
"",
"",
"");
linksArr.put(linkObj_holder);
} else if (link.getType() == LinkType.ObjectPropertySpecializationLink) {
ObjectPropertySpecializationLink opLink = (ObjectPropertySpecializationLink) link;
Link specializedLink = opLink.getSpecializedLink();
// Get height of the class instance node
int height = nodeHeightsMap.get(specializedLink.getTarget());
// Add 2 more holder nodes
// Start node
JSONArray hNodeIdsCoveredByVertex_holder = new JSONArray();
for (Node v : nodeCoverage.get(specializedLink.getTarget())) {
if (v instanceof ColumnNode) {
ColumnNode cNode = (ColumnNode) v;
hNodeIdsCoveredByVertex_holder.put(cNode.getHNodeId());
}
}
JSONObject startNode =
getNodeJsonObject(
"",
source.getId() + "_holder",
JsonValues.DataPropertyOfColumnHolder.name(),
height + 0.65,
hNodeIdsCoveredByVertex_holder,
"");
nodesArr.put(startNode);
nodesIndexcounter++;
// End node
String endHNodeId = ((ColumnNode) link.getTarget()).getHNodeId();
JSONArray hNodeIdsCoveredByVertex_holder_2 = new JSONArray();
hNodeIdsCoveredByVertex_holder_2.put(endHNodeId);
JSONObject endNode =
getNodeJsonObject(
"",
target.getId() + "_holder",
JsonValues.DataPropertyOfColumnHolder.name(),
height + 0.65,
hNodeIdsCoveredByVertex_holder_2,
endHNodeId);
nodesArr.put(endNode);
nodesIndexcounter++;
// Add the horizontal link
JSONObject linkObj_holder =
getLinkJsonObject(
"",
"",
nodesIndexcounter - 2,
nodesIndexcounter - 1,
JsonValues.horizontalDataPropertyLink.name(),
"",
"",
"");
linksArr.put(linkObj_holder);
}
linkObj.put(JsonKeys.linkType.name(), link.getType());
}
}
// Add the vertices for the columns that were not in Steiner tree
hNodeIdList.removeAll(hNodeIdsAdded);
for (String hNodeId : hNodeIdList) {
JSONArray hNodeIdsCoveredByVertex = new JSONArray();
hNodeIdsCoveredByVertex.put(hNodeId);
JSONObject vertObj =
getNodeJsonObject(
"", hNodeId, JsonValues.Unassigned.name(), 0, hNodeIdsCoveredByVertex, hNodeId);
nodesArr.put(vertObj);
}
topObj.put(JsonKeys.maxTreeHeight.name(), maxTreeHeight);
topObj.put(JsonKeys.nodes.name(), nodesArr);
topObj.put(JsonKeys.links.name(), linksArr);
pw.write(topObj.toString());
} catch (JSONException e) {
logger.error("Error occured while writing JSON!", e);
}
}