/**
* Creates the levels higher than the given level
*
* @param boundablesOfALevel the level to build on
* @param level the level of the Boundables, or -1 if the boundables are item boundables (that is,
* below level 0)
* @return the root, which may be a ParentNode or a LeafNode
*/
private AbstractNode createHigherLevels(List boundablesOfALevel, int level) {
Assert.isTrue(!boundablesOfALevel.isEmpty());
List parentBoundables = createParentBoundables(boundablesOfALevel, level + 1);
if (parentBoundables.size() == 1) {
return (AbstractNode) parentBoundables.get(0);
}
return createHigherLevels(parentBoundables, level + 1);
}
public Geometry buffer(Geometry g, double distance) {
PrecisionModel precisionModel = workingPrecisionModel;
if (precisionModel == null) precisionModel = g.getPrecisionModel();
// factory must be the same as the one used by the input
geomFact = g.getFactory();
OffsetCurveBuilder curveBuilder = new OffsetCurveBuilder(precisionModel, bufParams);
OffsetCurveSetBuilder curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
List bufferSegStrList = curveSetBuilder.getCurves();
// short-circuit test
if (bufferSegStrList.size() <= 0) {
return createEmptyResultGeometry();
}
// BufferDebug.runCount++;
// String filename = "run" + BufferDebug.runCount + "_curves";
// System.out.println("saving " + filename);
// BufferDebug.saveEdges(bufferEdgeList, filename);
// DEBUGGING ONLY
// WKTWriter wktWriter = new WKTWriter();
// Debug.println("Rings: " + wktWriter.write(convertSegStrings(bufferSegStrList.iterator())));
// wktWriter.setMaxCoordinatesPerLine(10);
// System.out.println(wktWriter.writeFormatted(convertSegStrings(bufferSegStrList.iterator())));
computeNodedEdges(bufferSegStrList, precisionModel);
graph = new PlanarGraph(new OverlayNodeFactory());
graph.addEdges(edgeList.getEdges());
List subgraphList = createSubgraphs(graph);
PolygonBuilder polyBuilder = new PolygonBuilder(geomFact);
buildSubgraphs(subgraphList, polyBuilder);
List resultPolyList = polyBuilder.getPolygons();
// just in case...
if (resultPolyList.size() <= 0) {
return createEmptyResultGeometry();
}
Geometry resultGeom = geomFact.buildGeometry(resultPolyList);
return resultGeom;
}
private void query(Object searchBounds, AbstractNode node, ItemVisitor visitor) {
List childBoundables = node.getChildBoundables();
for (int i = 0; i < childBoundables.size(); i++) {
Boundable childBoundable = (Boundable) childBoundables.get(i);
if (!getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds)) {
continue;
}
if (childBoundable instanceof AbstractNode) {
query(searchBounds, (AbstractNode) childBoundable, visitor);
} else if (childBoundable instanceof ItemBoundable) {
visitor.visitItem(((ItemBoundable) childBoundable).getItem());
} else {
Assert.shouldNeverReachHere();
}
}
}
private List itemsTree(AbstractNode node) {
List valuesTreeForNode = new ArrayList();
for (Iterator i = node.getChildBoundables().iterator(); i.hasNext(); ) {
Boundable childBoundable = (Boundable) i.next();
if (childBoundable instanceof AbstractNode) {
List valuesTreeForChild = itemsTree((AbstractNode) childBoundable);
// only add if not null (which indicates an item somewhere in this tree
if (valuesTreeForChild != null) valuesTreeForNode.add(valuesTreeForChild);
} else if (childBoundable instanceof ItemBoundable) {
valuesTreeForNode.add(((ItemBoundable) childBoundable).getItem());
} else {
Assert.shouldNeverReachHere();
}
}
if (valuesTreeForNode.size() <= 0) return null;
return valuesTreeForNode;
}
protected AbstractNode lastNode(List nodes) {
return (AbstractNode) nodes.get(nodes.size() - 1);
}