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// Copyright (C) 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ICING_RESULT_PROJECTION_TREE_H_
#define ICING_RESULT_PROJECTION_TREE_H_
#include <string_view>
#include <vector>
#include "icing/proto/search.pb.h"
namespace icing {
namespace lib {
class ProjectionTree {
public:
static constexpr std::string_view kSchemaTypeWildcard = "*";
struct Node {
explicit Node(std::string_view name = "") : name(name) {}
// TODO: change string_view to string
std::string_view name;
std::vector<Node> children;
bool operator==(const Node& other) const {
return name == other.name && children == other.children;
}
};
explicit ProjectionTree(const TypePropertyMask& type_field_mask);
const Node& root() const { return root_; }
bool operator==(const ProjectionTree& other) const {
return root_ == other.root_;
}
private:
// Add a child node with property_name to current_children and returns a
// pointer to the child node.
Node* AddChildNode(std::string_view property_name,
std::vector<Node>* current_children);
Node root_;
};
} // namespace lib
} // namespace icing
#endif // ICING_RESULT_PROJECTION_TREE_H_
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