// merge the info from 'incoming' into this record.
// we finish with a union of this+incoming and special handling for collisions
bool MediaAnalyticsItem::merge(MediaAnalyticsItem *incoming) {
// if I don't have key or session id, take them from incoming
// 'this' should never be missing both of them...
if (mKey.empty()) {
mKey = incoming->mKey;
} else if (mSessionID == 0) {
mSessionID = incoming->mSessionID;
}
// we always take the more recent 'finalized' value
setFinalized(incoming->getFinalized());
// for each attribute from 'incoming', resolve appropriately
int nattr = incoming->mPropCount;
for (int i = 0 ; i < nattr; i++ ) {
Prop *iprop = &incoming->mProps[i];
Prop *oprop = findProp(iprop->mName);
const char *p = iprop->mName;
size_t len = strlen(p);
char semantic = p[len-1];
if (oprop == NULL) {
// no oprop, so we insert the new one
oprop = allocateProp(p);
copyProp(oprop, iprop);
} else {
// merge iprop into oprop
switch (semantic) {
case '<': // first aka keep old)
/* nop */
break;
default: // default is 'last'
case '>': // last (aka keep new)
copyProp(oprop, iprop);
break;
case '+': /* sum */
// XXX validate numeric types, sum in place
break;
}
}
}
// not sure when we'd return false...
return true;
}
void finalize(Box* b) {
GCAllocation* al = GCAllocation::fromUserData(b);
assert(!hasFinalized(al));
setFinalized(al);
b->cls->tp_dealloc(b);
}