mirror of https://gitee.com/bigwinds/arangodb
110 lines
3.2 KiB
C++
110 lines
3.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 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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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_INDEXES_FULLTEXT_INDEX_H
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#define ARANGOD_INDEXES_FULLTEXT_INDEX_H 1
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#include "Basics/Common.h"
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#include "FulltextIndex/fulltext-common.h"
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#include "Indexes/Index.h"
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#include "VocBase/vocbase.h"
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#include "VocBase/voc-types.h"
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#include <velocypack/Builder.h>
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#include <velocypack/velocypack-aliases.h>
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// TRI_fulltext_doc_t must be capable of storing revision ids
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static_assert(sizeof(TRI_fulltext_doc_t) >= sizeof(TRI_voc_rid_t), "invalid size of TRI_fulltext_doc_t");
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namespace arangodb {
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class FulltextIndex final : public Index {
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public:
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FulltextIndex() = delete;
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FulltextIndex(TRI_idx_iid_t, LogicalCollection*,
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arangodb::velocypack::Slice const&);
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~FulltextIndex();
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public:
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IndexType type() const override {
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return Index::TRI_IDX_TYPE_FULLTEXT_INDEX;
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}
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bool allowExpansion() const override { return false; }
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bool canBeDropped() const override { return true; }
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bool isSorted() const override { return false; }
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bool hasSelectivityEstimate() const override { return false; }
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size_t memory() const override;
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void toVelocyPack(VPackBuilder&, bool) const override;
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// Uses default toVelocyPackFigures
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bool matchesDefinition(VPackSlice const&) const override;
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int insert(arangodb::Transaction*, TRI_voc_rid_t, arangodb::velocypack::Slice const&, bool isRollback) override;
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int remove(arangodb::Transaction*, TRI_voc_rid_t, arangodb::velocypack::Slice const&, bool isRollback) override;
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int unload() override;
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int cleanup() override;
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bool isSame(std::string const& field, int minWordLength) const {
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std::string fieldString;
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TRI_AttributeNamesToString(fields()[0], fieldString);
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return (_minWordLength == minWordLength && fieldString == field);
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}
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TRI_fts_index_t* internals() { return _fulltextIndex; }
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static TRI_fulltext_doc_t fromRevision(TRI_voc_rid_t revisionId) {
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return static_cast<TRI_fulltext_doc_t>(revisionId);
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}
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static TRI_voc_rid_t toRevision(TRI_fulltext_doc_t internal) {
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return static_cast<TRI_voc_rid_t>(internal);
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}
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private:
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std::vector<std::string> wordlist(arangodb::velocypack::Slice const&);
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private:
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/// @brief the indexed attribute (path)
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std::vector<std::string> _attr;
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/// @brief the fulltext index
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TRI_fts_index_t* _fulltextIndex;
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/// @brief minimum word length
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int _minWordLength;
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};
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}
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#endif
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