mirror of https://gitee.com/bigwinds/arangodb
118 lines
3.8 KiB
C++
118 lines
3.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Class for arangodb's graph features. Wrapper around the graph informations
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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 2014-2015 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 Michael Hackstein
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/// @author Copyright 2014-2015, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "Basics/JsonHelper.h"
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#include "Aql/Graphs.h"
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using namespace triagens::basics;
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using namespace triagens::aql;
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char const* Graph::_attrEdgeDefs = "edgeDefinitions";
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char const* Graph::_attrOrphans = "orphanCollections";
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// -----------------------------------------------------------------------------
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// --SECTION-- Local utils
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// -----------------------------------------------------------------------------
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void Graph::insertVertexCollectionsFromJsonArray(triagens::basics::Json& arr) {
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for (size_t j = 0; j < arr.size(); ++j) {
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Json c = arr.at(j);
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TRI_ASSERT(c.isString());
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std::string name = JsonHelper::getStringValue(c.json(), "");
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addVertexCollection(name);
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}
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- Graph Class
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// -----------------------------------------------------------------------------
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std::unordered_set<std::string> const& Graph::vertexCollections () const {
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return _vertexColls;
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}
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std::unordered_set<std::string> const& Graph::edgeCollections () const {
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return _edgeColls;
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}
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void Graph::addEdgeCollection (std::string name) {
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_edgeColls.insert(name);
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}
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void Graph::addVertexCollection (std::string name) {
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_vertexColls.insert(name);
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}
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triagens::basics::Json Graph::toJson (TRI_memory_zone_t* z,
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bool verbose) const {
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triagens::basics::Json json(z, triagens::basics::Json::Object);
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if (! _vertexColls.empty()) {
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triagens::basics::Json vcn(z, triagens::basics::Json::Array, _vertexColls.size());
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for (auto const& cn : _vertexColls) {
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vcn.add(triagens::basics::Json(cn));
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}
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json("vertexCollectionNames", vcn);
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}
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if (! _edgeColls.empty()) {
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triagens::basics::Json ecn(z, triagens::basics::Json::Array, _edgeColls.size());
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for (auto const& cn : _edgeColls) {
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ecn.add(triagens::basics::Json(cn));
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}
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json("edgeCollectionNames", ecn);
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}
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return json;
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}
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Graph::Graph(triagens::basics::Json j) :
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_vertexColls(),
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_edgeColls()
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{
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auto jsonDef = j.get(_attrEdgeDefs);
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for (size_t i = 0; i < jsonDef.size(); ++i) {
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Json def = jsonDef.at(i);
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TRI_ASSERT(def.isObject());
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Json e = def.get("collection");
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TRI_ASSERT(e.isString());
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std::string eCol = JsonHelper::getStringValue(e.json(), "");
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addEdgeCollection(eCol);
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e = def.get("from");
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TRI_ASSERT(e.isArray());
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insertVertexCollectionsFromJsonArray(e);
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e = def.get("to");
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TRI_ASSERT(e.isArray());
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insertVertexCollectionsFromJsonArray(e);
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}
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auto orphans = j.get(_attrOrphans);
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insertVertexCollectionsFromJsonArray(orphans);
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}
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