ConstValue LocalView::runReduce(const ConstValue &rows) const {
AutoArray<KeyAndDocId, SmallAlloc<256> > keylist;
AutoArray<ConstValue, SmallAlloc<256> > values;
keylist.reserve(rows.length());
values.reserve(rows.length());
for (JSON::ConstIterator iter = rows->getFwConstIter(); iter.hasItems();) {
const JSON::ConstValue &v = iter.getNext();
keylist.add(KeyAndDocId(v["key"],v["id"].getStringA()));
values.add(v["value"]);
}
return reduce(keylist,values,false);
}
ConstValue LocalView::searchKeys(const ConstValue &keys, natural groupLevel) const {
Shared _(lock);
Container rows = json.array();
bool grouped = groupLevel > 0 && groupLevel < naturalNull;
for (natural i = 0; i < keys.length(); i++) {
ConstValue subrows = searchOneKey(keys[i]);
if (grouped) {
ConstValue r = runReduce(subrows);
if (r == null) grouped = false;
else {
subrows = json("key", keys[i])
("value", r);
}
}
rows.load(subrows);
}
if (groupLevel == 0) {
ConstValue r = runReduce(rows);
if (r != null) {
rows = json << json("key",null)
("value",r);
}
}
return json("rows",rows)("total_rows",keyToValueMap.length());
}
static bool canGroupKeys(const ConstValue &subj, const ConstValue &sliced) {
if (sliced == null) return false;
if (subj->isArray()) {
natural cnt = subj.length();
if (cnt >= sliced.length()) {
cnt = sliced.length();
} else {
return false;
}
for (natural i = 0; i < cnt; i++) {
if (compareJson(subj[i],sliced[i]) != cmpResultEqual) return false;
}
return true;
} else {
return compareJson(subj,sliced) == cmpResultEqual;
}
}
static ConstValue sliceKey(const ConstValue &key, natural groupLevel, const Json &json) {
if (key->isArray()) {
if (key.length() <= groupLevel) return key;
Container out = json.array();
for (natural i = 0; i < groupLevel; i++)
out.add(key[i]);
return out;
} else {
return key;
}
}
