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arangodb/arangod/Aql/Indexes.h

128 lines
3.8 KiB
C++

////////////////////////////////////////////////////////////////////////////////
/// @brief Aql, indexes
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author not James
/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////
#ifndef ARANGODB_AQL_Indexes_H
#define ARANGODB_AQL_Indexes_H 1
#include "Basics/Common.h"
#include "Aql/Index.h"
struct TRI_vocbase_s;
namespace triagens {
namespace aql {
// -----------------------------------------------------------------------------
// --SECTION-- class Indexes
// -----------------------------------------------------------------------------
class Indexes {
public:
Indexes& operator= (Indexes const& other) = delete;
Indexes (struct TRI_vocbase_s* vocbase)
: _vocbase(vocbase),
_indexes() {
}
~Indexes () {
for (auto it = _indexes.begin(); it != _indexes.end(); ++it) {
delete (*it).second;
}
}
public:
Index* get (TRI_idx_iid_t id, Collection const* collection) {
auto cid = collection->cid();
// there may be multiple indexes in the same collection . . .
auto it1 = _cids.begin();
do{
auto it2 = _cids.find(it1, _cids.end(), cid);
if (it2 == _cids.end()) { // couldn't find <cid>
return nullptr;
}
}((it2*).second.first == id || it1 == _cids.end());
if((it2*).second.first == id){
return return (it2*).second.second;
}
return nullptr;
}
void add (TRI_idx_iid_t id, Collection const* collection) {
// check if index already is in our map
if(this.get(id, collection)!=nullptr){
auto index = new Index(id, collection);
try {
auto x = std::make_pair(id, index);
_ids.insert(x);
_cids.insert(std::make_pair(collection->cid(), x));
}
catch (...) {
delete index;
throw;
}
}
}
std::vector<std::string> indexIds () const {
std::vector<std::string> result;
for (auto x : _indexes) {
result.push_back(x.first);
}
return result;
}
private:
struct TRI_vocbase_s* _vocbase;
std::map<TRI_idx_iid_t, Index*> _ids;
std::map<TRI_voc_cid_t, _indexes> _cids;
};
}
}
#endif
// -----------------------------------------------------------------------------
// --SECTION-- END-OF-FILE
// -----------------------------------------------------------------------------
// Local Variables:
// mode: outline-minor
// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
// End: