Handle<Value> SublineStringMatcherJs::extractMatchingSublines(const Arguments& args)
{
HandleScope scope;
SublineStringMatcherJs* smJs = ObjectWrap::Unwrap<SublineStringMatcherJs>(args.This());
SublineStringMatcherPtr sm = smJs->getSublineStringMatcher();
OsmMapJs* mapJs = ObjectWrap::Unwrap<OsmMapJs>(args[0]->ToObject());
ElementJs* e1Js = ObjectWrap::Unwrap<ElementJs>(args[1]->ToObject());
ElementJs* e2Js = ObjectWrap::Unwrap<ElementJs>(args[2]->ToObject());
ConstOsmMapPtr m = mapJs->getConstMap();
ConstElementPtr e1 = e1Js->getConstElement();
ConstElementPtr e2 = e2Js->getConstElement();
Handle<Value> result;
try
{
WaySublineMatchString match = sm->findMatch(m, e1, e2);
if (match.isEmpty())
{
return Undefined();
}
// convert match into elements in a new map.
set<ElementId> eids;
eids.insert(e1->getElementId());
eids.insert(e2->getElementId());
OsmMapPtr copiedMap(new OsmMap(m->getProjection()));
CopySubsetOp(m, eids).apply(copiedMap);
WaySublineMatchString copiedMatch(match, copiedMap);
// split the shared line based on the matching subline
ElementPtr match1, scraps1;
ElementPtr match2, scraps2;
WaySublineString string1 = copiedMatch.getSublineString1();
WaySublineString string2 = copiedMatch.getSublineString2();
try
{
MultiLineStringSplitter().split(copiedMap, string1, copiedMatch.getReverseVector1(), match1,
scraps1);
MultiLineStringSplitter().split(copiedMap, string2, copiedMatch.getReverseVector2(), match2,
scraps2);
}
catch (const IllegalArgumentException& e)
{
// this is unusual print out some information useful to debugging.
MapReprojector::reprojectToWgs84(copiedMap);
LOG_WARN(OsmWriter::toString(copiedMap));
throw e;
}
if (!match1 || !match2)
{
result = Undefined();
}
else
{
Handle<Object> obj = Object::New();
obj->Set(String::NewSymbol("map"), OsmMapJs::create(copiedMap));
obj->Set(String::NewSymbol("match1"), ElementJs::New(match1));
obj->Set(String::NewSymbol("match2"), ElementJs::New(match2));
result = obj;
}
}
catch (const HootException& e)
{
return v8::ThrowException(HootExceptionJs::create(e));
}
return scope.Close(result);
}
