mirror of https://gitee.com/bigwinds/arangodb
155 lines
5.2 KiB
C++
155 lines
5.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief edge index
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_INDEXES_EDGE_INDEX_H
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#define ARANGODB_INDEXES_EDGE_INDEX_H 1
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#include "Basics/Common.h"
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#include "Basics/AssocMulti.h"
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#include "Indexes/Index.h"
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#include "VocBase/edge-collection.h"
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#include "VocBase/vocbase.h"
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#include "VocBase/voc-types.h"
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// -----------------------------------------------------------------------------
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// --SECTION-- class EdgeIndex
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// -----------------------------------------------------------------------------
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namespace triagens {
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namespace arango {
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class EdgeIndex : public Index {
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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public:
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EdgeIndex () = delete;
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EdgeIndex (TRI_idx_iid_t,
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struct TRI_document_collection_t*);
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~EdgeIndex ();
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// -----------------------------------------------------------------------------
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// --SECTION-- public types
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief typedef for hash tables
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////////////////////////////////////////////////////////////////////////////////
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typedef triagens::basics::AssocMulti<void, void, uint32_t> TRI_EdgeIndexHash_t;
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// -----------------------------------------------------------------------------
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// --SECTION-- public methods
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// -----------------------------------------------------------------------------
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public:
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IndexType type () const override final {
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return Index::TRI_IDX_TYPE_EDGE_INDEX;
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}
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bool hasSelectivityEstimate () const override final {
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return true;
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}
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double selectivityEstimate () const override final;
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bool dumpFields () const override final {
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return true;
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}
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size_t memory () const override final;
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triagens::basics::Json toJson (TRI_memory_zone_t*) const override final;
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int insert (struct TRI_doc_mptr_t const*, bool) override final;
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int remove (struct TRI_doc_mptr_t const*, bool) override final;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief looks up edges using the index, restarting at the edge pointed at
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/// by next
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////////////////////////////////////////////////////////////////////////////////
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void lookup (TRI_edge_index_iterator_t const*,
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std::vector<TRI_doc_mptr_copy_t>&,
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void*&,
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size_t);
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int sizeHint (size_t) override final;
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TRI_EdgeIndexHash_t* from () {
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return _edgesFrom;
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}
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TRI_EdgeIndexHash_t* to () {
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return _edgesTo;
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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// -----------------------------------------------------------------------------
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief the hash table for _from
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////////////////////////////////////////////////////////////////////////////////
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TRI_EdgeIndexHash_t* _edgesFrom;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief the hash table for _to
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////////////////////////////////////////////////////////////////////////////////
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TRI_EdgeIndexHash_t* _edgesTo;
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};
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}
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}
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#endif
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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