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#ifndef STATEMENT_H_29F51659
#define STATEMENT_H_29F51659
#include <string>
#include <list>
#include <map>
#include <set>
#include "binding.h"
#include "enums.h"
#include "field.h"
#include "filter.h"
namespace verbly {
class filter;
class statement {
public:
statement(object context, filter queryFilter);
std::string getQueryString(std::list<std::string> select, bool random, int limit) const;
std::list<binding> getBindings() const;
private:
class join {
public:
join(
bool outer,
std::string foreignTableName,
std::string joinTable,
std::string joinColumn,
std::string foreignTable,
std::string foreignColumn) :
outer_(outer),
foreignTableName_(std::move(foreignTableName)),
joinTable_(std::move(joinTable)),
joinColumn_(std::move(joinColumn)),
foreignTable_(std::move(foreignTable)),
foreignColumn_(std::move(foreignColumn))
{
}
bool isOuterJoin() const
{
return outer_;
}
const std::string& getForeignTableName() const
{
return foreignTableName_;
}
const std::string& getJoinTable() const
{
return joinTable_;
}
const std::string& getJoinColumn() const
{
return joinColumn_;
}
const std::string& getForeignTable() const
{
return foreignTable_;
}
const std::string& getForeignColumn() const
{
return foreignColumn_;
}
private:
bool outer_ = false;
std::string foreignTableName_;
std::string joinTable_;
std::string joinColumn_;
std::string foreignTable_;
std::string foreignColumn_;
};
friend std::ostream& operator<<(std::ostream& oss, const join& j);
class condition {
public:
enum class type {
empty,
singleton,
group
};
enum class comparison {
equals,
does_not_equal,
is_greater_than,
is_at_most,
is_less_than,
is_at_least,
is_like,
is_not_like,
is_not_null,
is_null
};
// Copy and move constructors
condition(const condition& other);
condition(condition&& other);
// Assignment
condition& operator=(condition other);
// Swap
friend void swap(condition& first, condition& second);
// Destructor
~condition();
// Accessors
type getType() const
{
return type_;
}
// Empty
condition();
// Singleton
condition(std::string table, std::string column, bool isNull);
condition(std::string table, std::string column, comparison comp, binding value);
// Group
explicit condition(bool orlogic);
condition& operator+=(condition n);
condition& operator&=(condition n);
const std::list<condition>& getChildren() const;
// Utility
std::string toSql() const;
std::list<binding> flattenBindings() const;
private:
union {
struct {
std::string table_;
std::string column_;
comparison comparison_;
binding value_;
} singleton_;
struct {
std::list<condition> children_;
bool orlogic_;
} group_;
};
type type_;
};
friend void swap(condition& first, condition& second);
class with {
public:
with(
std::string identifier,
field f,
std::map<std::string, std::string> tables,
std::string topTable,
condition where,
std::list<join> joins) :
identifier_(std::move(identifier)),
field_(f),
tables_(std::move(tables)),
topTable_(std::move(topTable)),
topCondition_(std::move(where)),
joins_(std::move(joins))
{
}
const std::string& getIdentifier() const
{
return identifier_;
}
field getField() const
{
return field_;
}
std::string getTableForId(std::string identifier) const
{
return tables_.at(identifier);
}
const std::string& getTopTable() const
{
return topTable_;
}
const condition& getCondition() const
{
return topCondition_;
}
const std::list<join>& getJoins() const
{
return joins_;
}
private:
std::string identifier_;
field field_;
std::map<std::string, std::string> tables_;
std::string topTable_;
condition topCondition_;
std::list<join> joins_;
};
static constexpr const char* getTableForContext(object context)
{
return (context == object::notion) ? "notions"
: (context == object::word) ? "words"
: (context == object::group) ? "groups"
: (context == object::frame) ? "frames"
: (context == object::lemma) ? "lemmas_forms"
: (context == object::form) ? "forms"
: (context == object::pronunciation) ? "pronunciations"
: throw std::domain_error("Provided context has no associated table");
}
static const std::list<field> getSelectForContext(object context);
statement(std::string tableName, filter clause, int nextTableId = 0, int nextWithId = 0);
condition parseFilter(filter queryFilter);
std::string instantiateTable(std::string name);
condition integrate(statement subStmt);
int nextTableId_;
int nextWithId_;
std::map<std::string, std::string> tables_;
std::string topTable_;
std::list<join> joins_;
std::list<with> withs_;
condition topCondition_;
};
};
#endif /* end of include guard: STATEMENT_H_29F51659 */
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