1 // Copyright (C) 2019 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef ICING_RESULT_PROJECTION_TREE_H_ 16 #define ICING_RESULT_PROJECTION_TREE_H_ 17 18 #include <string_view> 19 #include <vector> 20 21 #include "icing/proto/search.pb.h" 22 #include "icing/schema/schema-store.h" 23 24 namespace icing { 25 namespace lib { 26 27 class ProjectionTree { 28 public: 29 struct Node { nameNode30 explicit Node(std::string name = "") : name(std::move(name)) {} 31 32 std::string name; 33 std::vector<Node> children; 34 35 bool operator==(const Node& other) const { 36 return name == other.name && children == other.children; 37 } 38 }; 39 40 explicit ProjectionTree( 41 const SchemaStore::ExpandedTypePropertyMask& type_field_mask); 42 root()43 const Node& root() const { return root_; } 44 45 bool operator==(const ProjectionTree& other) const { 46 return root_ == other.root_; 47 } 48 49 private: 50 // Add a child node with property_name to current_children and returns a 51 // pointer to the child node. 52 Node* AddChildNode(std::string_view property_name, 53 std::vector<Node>* current_children); 54 55 Node root_; 56 }; 57 58 } // namespace lib 59 } // namespace icing 60 61 #endif // ICING_RESULT_PROJECTION_TREE_H_ 62