v8::Handle<v8::Value> PoiMergerJs::jsPoiMerge(const v8::Arguments& args)
{
HandleScope scope;
try{
if (args.Length() != 2)
{
return v8::ThrowException(HootExceptionJs::create(IllegalArgumentException(
"Expected exactly two arguments to 'poiMerge'.")));
}
// Argument 1: script -- note second param is directory to search under (~/hoot/rules)
const QString scriptPath = ConfPath::search(toCpp<QString>(args[0]), "rules");
// Argument 2: Map with POIs
OsmMapJs* mapJs = node::ObjectWrap::Unwrap<OsmMapJs>(args[1]->ToObject());
// Pull out internal POI map
OsmMapPtr map( mapJs->getMap() );
// Instantiate script merger
shared_ptr<PluginContext> script(new PluginContext());
v8::HandleScope handleScope;
v8::Context::Scope context_scope(script->getContext());
script->loadScript(scriptPath, "plugin");
v8::Handle<v8::Object> global = script->getContext()->Global();
if (global->Has(String::New("plugin")) == false)
{
return v8::ThrowException(HootExceptionJs::create(IllegalArgumentException(
"Expected the script to have exports.")));
}
v8::Handle<v8::Value> pluginValue = global->Get(String::New("plugin"));
v8::Persistent<v8::Object> plugin = v8::Persistent<v8::Object>::New(v8::Handle<v8::Object>::Cast(pluginValue));
if (plugin.IsEmpty() || plugin->IsObject() == false)
{
return v8::ThrowException(HootExceptionJs::create(IllegalArgumentException(
"Expected plugin to be a valid object.")));
}
// Got in Map with POIs A, B, C, D, E
//
// Make a set of pairs to indicate all are same object:
// A->B, A->C, A->D, A->E
//
// ...then pass those pairs one at a time through the merger, since it only merges pairs
OsmMap::NodeMap nodes = map->getNodeMap();
OsmMapPtr mergedMap(map);
const ElementId firstId = ElementId::node((*(nodes.constBegin()))->getId());
//LOG_DEBUG("First ID: " << firstId.getId());
for (OsmMap::NodeMap::const_iterator it = nodes.constBegin() + 1; it != nodes.constEnd(); ++it)
{
const boost::shared_ptr<const Node>& n = it.value();
std::set< std::pair< ElementId, ElementId> > matches;
matches.insert(std::pair<ElementId,ElementId>(firstId, ElementId::node(n->getId())));
// Now create scriptmerger, and invoke apply method which will apply apply merge transformation, reducing the POIs down to one
ScriptMerger merger(script, plugin, matches);
OsmMapPtr mergedMap(map);
std::vector< std::pair< ElementId, ElementId > > replacedNodes;
merger.apply(mergedMap, replacedNodes );
if ( replacedNodes.size() == 1 )
{
/*
LOG_DEBUG("POI merge: replacing node #" << replacedNodes[0].first.getId() <<
" with updated version of node #" << replacedNodes[0].second.getId() );
*/
mergedMap->replaceNode(replacedNodes[0].first.getId(), replacedNodes[0].second.getId());
}
}
// Hand merged POIs back to caller in OsmMap
v8::Handle<v8::Object> returnMap = OsmMapJs::create(mergedMap);
return scope.Close(returnMap);
}
catch ( const HootException& e )
{
return v8::ThrowException(HootExceptionJs::create(e));
}
}
void MapCropper::apply(shared_ptr<OsmMap>& map)
{
LOG_INFO("Cropping map.");
shared_ptr<OsmMap> result = map;
if (MapReprojector::isGeographic(map) == false && _nodeBounds.isNull() == false)
{
throw HootException("If the node bounds is set the projection must be geographic.");
}
// @todo visit the elements from the most senior (e.g. relation that has no parents) to the
// most junior (nodes).
// go through all the ways
const WayMap ways = result->getWays();
for (WayMap::const_iterator it = ways.begin(); it != ways.end(); it++)
{
const shared_ptr<Way>& w = it->second;
shared_ptr<LineString> ls = ElementConverter(map).convertToLineString(w);
const Envelope& e = *(ls->getEnvelopeInternal());
// if the way is completely outside the region we're keeping
if (_isWhollyOutside(e))
{
// remove the way
result->removeWayFully(w->getId());
}
else if (_isWhollyInside(e))
{
// keep the way
}
else
{
// do an expensive operation to decide how much to keep, if any.
_cropWay(result, w->getId());
}
}
shared_ptr<NodeToWayMap> n2wp = result->getIndex().getNodeToWayMap();
NodeToWayMap& n2w = *n2wp;
LOG_INFO(" Removing nodes...");
// go through all the nodes
const OsmMap::NodeMap nodes = result->getNodeMap();
for (OsmMap::NodeMap::const_iterator it = nodes.constBegin(); it != nodes.constEnd(); it++)
{
const Coordinate& c = it.value()->toCoordinate();
bool nodeInside = false;
if (_envelope.isNull() == false)
{
if (_invert == false)
{
nodeInside = _envelope.covers(c);
}
else
{
nodeInside = !_envelope.covers(c);
}
}
else
{
auto_ptr<Point> p(GeometryFactory::getDefaultInstance()->createPoint(c));
if (_invert == false)
{
nodeInside = _envelopeG->intersects(p.get());
}
else
{
nodeInside = !_envelopeG->intersects(p.get());
}
}
// if the node is outside
if (!nodeInside)
{
// if the node is within the limiting bounds.
if (_nodeBounds.isNull() == true || _nodeBounds.contains(c))
{
// if the node is not part of a way
if (n2w.find(it.key()) == n2w.end())
{
// remove the node
result->removeNodeNoCheck(it.value()->getId());
}
}
}
}
RemoveEmptyRelationsVisitor v;
map->visitRw(v);
}