GiSTentry *
MTnode::Union () const
{
Object *objTemp = NULL;
if (!obj) { // retrieve the node's parent object
MTentry *parentEntry = ParentEntry ();
((MTnode *)this)->obj = (objTemp = new Object(parentEntry->object()));
delete parentEntry;
}
GiSTpath path = ((MTnode *)this)->Path();
MTentry *unionEntry = new MTentry;
unionEntry->InitKey();
if (path.Level() > 1) { // len>=3
MTentry *parentEntry = ParentEntry ();
if (parentEntry) { // copy the entry
unionEntry->Key()->distance = parentEntry->Key()->distance;
if (parentEntry->Key()->splitted) {
unionEntry->Key()->splitted = TRUE;
}
delete parentEntry;
}
if (unionEntry->Key()->distance == -MaxDist()) { // compute the distance from the parent
MTnode *parentNode = ((MT *)Tree())->ParentNode((MTnode *)this);
MTentry *grandEntry = parentNode->ParentEntry();
unionEntry->Key()->distance = obj->distance(grandEntry->object());
unionEntry->Key()->splitted = TRUE;
delete grandEntry;
delete parentNode;
}
}
unionEntry->SetObject(*obj);
unionEntry->SetMaxRadius(0);
unionEntry->SetMinRadius(MAXDOUBLE);
mMRadius (unionEntry); // compute the radii
if (objTemp) {
delete objTemp;
}
((MTnode *)this)->obj = NULL;
return unionEntry;
}
GiSTentry *
MTnode::Union() const
{
GiSTpath path=((MTnode *)this)->Path();
MTentry *u=new MTentry;
Object *o=NULL;
u->InitKey();
if(obj==NULL) { // retrieve the node's object
MTentry *e=Entry();
((MTnode *)this)->obj=(o=new Object(e->object()));
delete e;
}
if(path.Level()>1) { // if we aren't in the root...
MTnode *parent=((MT *)Tree())->ParentNode((MTnode *)this);
MTentry *e=Entry();
if(e!=NULL) { // copy the entry
u->Key()->distance=e->Key()->distance;
if(e->Key()->splitted) u->Key()->recomp=TRUE;
delete e;
}
if(u->Key()->distance<0) { // compute the distance from the parent
MTentry *fe=parent->Entry();
if(u->Key()->distance==-maxDist()) u->Key()->distance=obj->distance(fe->object());
u->Key()->recomp=TRUE;
delete fe;
}
delete parent;
}
u->setobject(*obj);
u->setmaxradius(0);
u->setminradius(MAXDOUBLE);
mMRadius(u); // compute the radii
if(o!=NULL) delete o;
((MTnode *)this)->obj=NULL;
return u;
}
