mirror of https://gitee.com/bigwinds/arangodb
127 lines
4.8 KiB
C++
127 lines
4.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief Aql, AST variable
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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 Jan Steemann
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "Aql/Variable.h"
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#include "Basics/JsonHelper.h"
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using namespace triagens::aql;
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using namespace triagens::basics;
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// -----------------------------------------------------------------------------
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// --SECTION-- static initializers
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief name of $OLD variable
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////////////////////////////////////////////////////////////////////////////////
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char const* const Variable::NAME_OLD = "$OLD";
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////////////////////////////////////////////////////////////////////////////////
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/// @brief name of $NEW variable
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////////////////////////////////////////////////////////////////////////////////
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char const* const Variable::NAME_NEW = "$NEW";
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////////////////////////////////////////////////////////////////////////////////
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/// @brief name of $CURRENT variable
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////////////////////////////////////////////////////////////////////////////////
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char const* const Variable::NAME_CURRENT = "$CURRENT";
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create the variable
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////////////////////////////////////////////////////////////////////////////////
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Variable::Variable (std::string const& name,
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VariableId id)
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: name(name),
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value(nullptr),
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id(id) {
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}
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Variable::Variable (triagens::basics::Json const& json)
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: Variable(JsonHelper::checkAndGetStringValue(json.json(), "name"), JsonHelper::checkAndGetNumericValue<VariableId>(json.json(), "id")) {
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destroy the variable
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////////////////////////////////////////////////////////////////////////////////
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Variable::~Variable () {
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief return a JSON representation of the variable
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////////////////////////////////////////////////////////////////////////////////
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triagens::basics::Json Variable::toJson () const {
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triagens::basics::Json json(triagens::basics::Json::Object, 2);
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json("id", triagens::basics::Json(static_cast<double>(id)))
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("name", triagens::basics::Json(name));
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return json;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief replace a variable by another
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////////////////////////////////////////////////////////////////////////////////
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Variable const* Variable::replace (Variable const* variable,
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std::unordered_map<VariableId, Variable const*> const& replacements) {
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while (variable != nullptr) {
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auto it = replacements.find(variable->id);
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if (it != replacements.end()) {
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variable = (*it).second;
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}
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else {
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break;
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}
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}
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return variable;
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}
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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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