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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* @class document::select::Value
* @ingroup select
*
* @brief Values are entities that can be compared.
*
* To be able to cope with field specifications that can end up in values of
* multiple types we need an abstraction.
*
* @author H�kon Humberset
* @date 2007-20-05
* @version $Id$
*/
#pragma once
#include <memory>
#include <map>
#include <string>
#include <vector>
#include <iosfwd>
#include "resultlist.h"
namespace document::select {
class Value : public document::Printable
{
public:
using SP = std::shared_ptr<Value>;
using UP = std::unique_ptr<Value>;
enum Type { Invalid, Null, String, Integer, Float, Array, Struct, Bucket };
Value(Type t) : _type(t) {}
virtual ~Value() = default;
Type getType() const { return _type; }
virtual ResultList operator<(const Value& value) const = 0;
virtual ResultList operator==(const Value& value) const = 0;
virtual ResultList operator!=(const Value& value) const {
return !(this->operator==(value));
}
virtual ResultList operator>(const Value& value) const {
return (!(this->operator<(value)) && !(this->operator==(value)));
}
virtual ResultList operator>=(const Value& value) const {
return !(this->operator<(value));
}
virtual ResultList operator<=(const Value& value) const {
return ((this->operator<(value)) || (this->operator==(value)));
}
virtual ResultList globCompare(const Value& value) const;
virtual ResultList regexCompare(const Value& value) const;
virtual ResultList globTrace(const Value& value, std::ostream& trace) const;
virtual ResultList regexTrace(const Value& value, std::ostream& trace) const;
private:
Type _type;
};
class InvalidValue : public Value
{
public:
InvalidValue() : Value(Invalid) {}
ResultList operator<(const Value&) const override;
ResultList operator==(const Value&) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
};
class NullValue : public Value
{
public:
NullValue() : Value(Null) {}
ResultList operator<(const Value&) const override;
ResultList operator==(const Value&) const override;
ResultList operator>(const Value &) const override;
ResultList operator>=(const Value &) const override;
ResultList operator<=(const Value &) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
};
class StringValue : public Value
{
vespalib::string _value;
public:
StringValue(vespalib::stringref val);
const vespalib::string& getValue() const { return _value; }
ResultList operator<(const Value& value) const override;
ResultList operator==(const Value& value) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
};
class IntegerValue;
class FloatValue;
class NumberValue : public Value
{
public:
using CommonValueType = double;
NumberValue(Type t) : Value(t) {}
virtual CommonValueType getCommonValue() const = 0;
virtual ResultList operator<(const Value& value) const override = 0;
virtual ResultList operator>(const IntegerValue& value) const = 0;
virtual ResultList operator>(const FloatValue& value) const = 0;
virtual ResultList operator==(const Value& value) const override = 0;
virtual ResultList operator==(const IntegerValue& value) const = 0;
virtual ResultList operator==(const FloatValue& value) const = 0;
};
class IntegerValue : public NumberValue
{
public:
using ValueType = int64_t;
IntegerValue(ValueType value, bool isBucketValue);
ValueType getValue() const { return _value; }
CommonValueType getCommonValue() const override { return _value; }
ResultList operator<(const Value& value) const override;
ResultList operator==(const Value& value) const override;
ResultList operator>(const IntegerValue& value) const override;
ResultList operator>(const FloatValue& value) const override;
ResultList operator==(const IntegerValue& value) const override;
ResultList operator==(const FloatValue& value) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
private:
ValueType _value;
};
class FloatValue : public NumberValue
{
public:
using ValueType = double;
FloatValue(ValueType val);
ValueType getValue() const { return _value; }
CommonValueType getCommonValue() const override { return _value; }
ResultList operator<(const Value& value) const override;
ResultList operator==(const Value& value) const override;
ResultList operator>(const IntegerValue& value) const override;
ResultList operator>(const FloatValue& value) const override;
ResultList operator==(const IntegerValue& value) const override;
ResultList operator==(const FloatValue& value) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
private:
ValueType _value;
};
inline ResultList IntegerValue::operator>(const IntegerValue& value) const {
return ResultList(Result::get(_value > value.getValue()));
}
inline ResultList IntegerValue::operator>(const FloatValue& value) const {
return ResultList(Result::get(_value > value.getValue()));
}
inline ResultList IntegerValue::operator==(const IntegerValue& value) const {
return ResultList(Result::get(_value == value.getValue()));
}
inline ResultList IntegerValue::operator==(const FloatValue& value) const {
return ResultList(Result::get(_value == value.getValue()));
}
inline ResultList FloatValue::operator>(const IntegerValue& value) const {
return ResultList(Result::get(_value > value.getValue()));
}
inline ResultList FloatValue::operator>(const FloatValue& value) const {
return ResultList(Result::get(_value > value.getValue()));
}
inline ResultList FloatValue::operator==(const IntegerValue& value) const {
return ResultList(Result::get(_value == value.getValue()));
}
inline ResultList FloatValue::operator==(const FloatValue& value) const {
return ResultList(Result::get(_value == value.getValue()));
}
class ArrayValue : public Value
{
public:
using VariableValue = std::pair<fieldvalue::VariableMap, Value::SP>;
ArrayValue(std::vector<VariableValue> values);
ArrayValue(const ArrayValue &) = delete;
ArrayValue & operator =(const ArrayValue &) = delete;
~ArrayValue() override;
ResultList operator<(const Value& value) const override;
ResultList operator>(const Value& value) const override;
ResultList operator==(const Value& value) const override;
ResultList operator!=(const Value& value) const override;
ResultList operator>=(const Value& value) const override;
ResultList operator<=(const Value& value) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
ResultList globCompare(const Value& value) const override;
ResultList regexCompare(const Value& value) const override;
ResultList globTrace(const Value& value, std::ostream& trace) const override;
ResultList regexTrace(const Value& value, std::ostream& trace) const override;
template <typename Predicate>
ResultList doCompare(const Value& value, const Predicate& cmp) const;
private:
struct EqualsComparator;
struct NotEqualsComparator;
struct LessThanComparator;
struct GreaterThanComparator;
struct LessThanOrEqualsComparator;
struct GreaterThanOrEqualsComparator;
struct GlobComparator;
struct RegexComparator;
std::vector<VariableValue> _values;
};
class StructValue : public Value
{
public:
using ValueMap = std::map<vespalib::string, Value::SP>;
StructValue(ValueMap values);
StructValue(const StructValue &) = delete;
StructValue & operator = (const StructValue &) = delete;
~StructValue() override;
ResultList operator<(const Value& value) const override;
ResultList operator==(const Value& value) const override;
void print(std::ostream& out, bool verbose, const std::string& indent) const override;
private:
ValueMap _values;
};
}
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