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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/*
* @class document::select::Branch
* @ingroup select
*
* @brief Base class for branch nodes in the document selection tree.
*
* @author H�kon Humberset
*/
#pragma once
#include <memory>
#include <list>
#include "node.h"
namespace document::select {
class Branch : public Node
{
public:
explicit Branch(vespalib::stringref name) : Node(name) {}
Branch(vespalib::stringref name, uint32_t max_depth) : Node(name, max_depth) {}
bool isLeafNode() const override { return false; }
};
class And : public Branch
{
std::unique_ptr<Node> _left;
std::unique_ptr<Node> _right;
public:
And(std::unique_ptr<Node> left, std::unique_ptr<Node> right,
const char* name = nullptr);
ResultList contains(const Context& context) const override {
return (_left->contains(context) && _right->contains(context));
}
ResultList trace(const Context&, std::ostream& trace) const override;
void visit(Visitor &v) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
const Node& getLeft() const { return *_left; }
const Node& getRight() const { return *_right; }
Node::UP clone() const override{
return wrapParens(new And(_left->clone(), _right->clone(), _name.c_str()));
}
};
class Or : public Branch
{
std::unique_ptr<Node> _left;
std::unique_ptr<Node> _right;
public:
Or(std::unique_ptr<Node> left, std::unique_ptr<Node> right,
const char* name = nullptr);
ResultList contains(const Context& context) const override {
return (_left->contains(context) || _right->contains(context));
}
ResultList trace(const Context&, std::ostream& trace) const override;
void visit(Visitor &v) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
const Node& getLeft() const { return *_left; }
const Node& getRight() const { return *_right; }
Node::UP clone() const override {
return wrapParens(new Or(_left->clone(), _right->clone(), _name.c_str()));
}
};
class Not : public Branch
{
std::unique_ptr<Node> _child;
public:
Not(std::unique_ptr<Node> child, const char* name = nullptr);
ResultList contains(const Context& context) const override { return !_child->contains(context); }
ResultList trace(const Context&, std::ostream& trace) const override;
void visit(Visitor &v) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
const Node& getChild() const { return *_child; }
Node::UP clone() const override {
return wrapParens(new Not(_child->clone(), _name.c_str()));
}
};
}
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