Line data    Source code

       1             : /**
       2             :  * @file
       3             :  *
       4             :  * @brief example how easy it is to put keys in different data structures
       5             :  *
       6             :  * - * They might even have complete other properties than KeySet, e.g. in
       7             :  * this case:
       8             :  * - duplicates are allowed
       9             :  * - after sorting order is given by metadata "order"
      10             :  *
      11             :  * It is easy to create any other data structure, with any properties
      12             :  *
      13             :  * @copyright BSD License (see LICENSE.md or https://www.libelektra.org)
      14             :  */
      15             : 
      16             : #include <keyset.hpp>
      17             : 
      18             : #include <algorithm>
      19             : #include <iostream>
      20             : #include <vector>
      21             : 
      22           0 : bool keyOrder (kdb::Key k1, kdb::Key k2)
      23             : {
      24           0 :         int o1 = k1.getMeta<int> ("order");
      25           0 :         int o2 = k2.getMeta<int> ("order");
      26           0 :         return o1 < o2;
      27             : }
      28             : 
      29           0 : int main ()
      30             : {
      31           0 :         using namespace kdb;
      32             : 
      33           0 :         std::vector<Key> vc;
      34           0 :         vc.push_back (Key ("user:/key3/1", KEY_META, "order", "2", KEY_END));
      35           0 :         vc.push_back (Key ("user:/begin", KEY_META, "order", "1", KEY_END));
      36           0 :         vc.push_back (Key ("user:/key3/4", KEY_META, "order", "3", KEY_END));
      37           0 :         vc.push_back (Key ("user:/key3/dup", KEY_META, "order", "4", KEY_END));
      38           0 :         vc.push_back (Key ("user:/key3/dup", KEY_END));
      39           0 :         vc.push_back (Key ("user:/unordered", KEY_END));
      40           0 :         vc.push_back (Key ("user:/end", KEY_META, "order", "5", KEY_END));
      41             : 
      42           0 :         std::sort (vc.begin (), vc.end (), keyOrder);
      43             : 
      44           0 :         KeySet ks (20, KS_END);
      45           0 :         std::cout << "Our Vector with special ordering:" << std::endl;
      46           0 :         for (auto k : vc)
      47             :         {
      48             : 
      49           0 :                 std::cout << k.getName () << std::endl;
      50           0 :                 ks.append (k);
      51             :         }
      52             :         // now we have a keyset (of course again with KeySet ordering and
      53             :         // duplicates removed.
      54           0 :         std::cout << "\nNow KeySet:" << std::endl;
      55           0 :         for (auto && ks_i : ks)
      56             :         {
      57           0 :                 Key k (ks_i);
      58           0 :                 std::cout << k.getName () << std::endl;
      59             :         }
      60           0 : }