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83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
#include "applySubstitutions.h"
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#include <algorithm>
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#include <vector>
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namespace DB
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{
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void constructSubstitutions(ConfigurationPtr & substitutions_view, StringToVector & out_substitutions)
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{
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Strings xml_substitutions;
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substitutions_view->keys(xml_substitutions);
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for (size_t i = 0; i != xml_substitutions.size(); ++i)
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{
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const ConfigurationPtr xml_substitution(substitutions_view->createView("substitution[" + std::to_string(i) + "]"));
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/// Property values for substitution will be stored in a vector
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/// accessible by property name
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Strings xml_values;
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xml_substitution->keys("values", xml_values);
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std::string name = xml_substitution->getString("name");
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for (size_t j = 0; j != xml_values.size(); ++j)
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{
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out_substitutions[name].push_back(xml_substitution->getString("values.value[" + std::to_string(j) + "]"));
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}
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}
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}
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/// Recursive method which goes through all substitution blocks in xml
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/// and replaces property {names} by their values
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static void runThroughAllOptionsAndPush(StringToVector::iterator substitutions_left,
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StringToVector::iterator substitutions_right,
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const std::string & template_query,
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Strings & out_queries)
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{
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if (substitutions_left == substitutions_right)
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{
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out_queries.push_back(template_query); /// completely substituted query
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return;
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}
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std::string substitution_mask = "{" + substitutions_left->first + "}";
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if (template_query.find(substitution_mask) == std::string::npos) /// nothing to substitute here
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{
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runThroughAllOptionsAndPush(std::next(substitutions_left), substitutions_right, template_query, out_queries);
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return;
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}
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for (const std::string & value : substitutions_left->second)
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{
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/// Copy query string for each unique permutation
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std::string query = template_query;
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size_t substr_pos = 0;
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while (substr_pos != std::string::npos)
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{
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substr_pos = query.find(substitution_mask);
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if (substr_pos != std::string::npos)
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query.replace(substr_pos, substitution_mask.length(), value);
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}
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runThroughAllOptionsAndPush(std::next(substitutions_left), substitutions_right, query, out_queries);
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}
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}
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Strings formatQueries(const std::string & query, StringToVector substitutions_to_generate)
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{
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Strings queries_res;
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runThroughAllOptionsAndPush(
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substitutions_to_generate.begin(),
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substitutions_to_generate.end(),
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query,
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queries_res);
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return queries_res;
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}
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}
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