OW_NAMESPACE::WQLOperand Class Reference

Used to represent SQL where clause operands. More...

#include <OW_WQLOperand.hpp>

Collaboration diagram for OW_NAMESPACE::WQLOperand:


Public Types
enum	Type { NULL_VALUE, INTEGER_VALUE, DOUBLE_VALUE, BOOLEAN_VALUE, STRING_VALUE, PROPERTY_NAME }
	Defines allowed types of WQL operands (NULL_VALUE, INTEGER_VALUE, DOUBLE_VALUE, BOOLEAN_VALUE, STRING_VALUE, PROPERTY_NAME). More...
Public Member Functions
	WQLOperand ()
	Desfault constructor.
	WQLOperand (Int64 x, WQLIntegerValueTag)
	Initializes object as INTEGER_VALUE.
	WQLOperand (Real64 x, WQLDoubleValueTag)
	Initializes object as DOUBLE_VALUE.
	WQLOperand (bool x, WQLBoolValueTag)
	Initializes object as BOOLEAN_VALUE.
	WQLOperand (const String &x, WQLStringValueTag)
	Initializes object as STRING_VALUE.
	WQLOperand (const String &x, WQLPropertyNameTag)
	Initializes object as PROPERTY_NAME.
Type	getType () const
	Accessor for getting the type of the operand.
void	setIntegerValue (Int32 x)
	Sets this object to an INTEGER_VALUE.
void	setDoubleValue (Real64 x)
	Sets this object to an DOUBLE_VALUE.
void	setBoolValue (bool x)
	Sets this object to a BOOLEAN_VALUE.
void	setStringValue (const String &x)
	Sets this object to a STRING_VALUE.
void	setPropertyName (const String &x)
	Sets this object to a PROPERTY_NAME.
Int64	getIntegerValue () const
	Gets this object as an INTEGER_VALUE.
Real64	getDoubleValue () const
	Gets this object as an DOUBLE_VALUE.
bool	getBooleanValue () const
	Gets this object as an BOOLEAN_VALUE.
const String &	getStringValue () const
	Gets this object as a STRING_VALUE.
const String &	getPropertyName () const
	Gets this object as a PROPERTY_NAME.
String	toString () const
	Converts this object to a string for output purposes.
Private Attributes
String	_string
Type	_type
Int64	_integerValue
Real64	_doubleValue
bool	_booleanValue

Detailed Description

Used to represent SQL where clause operands.

Instances of WQLOperand are used to represent the operands of the SQL where clause. Instances of this class are created while parsing a SQL where clause and added to the WQLSelectStatement by calling the WQLSelectStatement::appendOperand() method. Consider the following example:

SELECT ratio, size, name, str
FROM MyClass
WHERE ratio > 1.4 AND size = 3 AND name = "Hello" AND str IS NULL

In this example, the following are operands:

ratio
1.4
size
3
name
"Hello"
str

Operands are of one of the following types:

NULL_VALUE - contains a null value of any type
INTEGER_VALUE - an integer literal (e.g., 10, -22)
DOUBLE_VALUE - a double literal (e.g., 1.4, 1.375e-5)
BOOLEAN_VALUE - a boolean literal (e.g., TRUE or FALSE)
STRING_VALUE - a string literal (e.g., "Hello World")
PROPERTY_NAME- the name of a property (e.g., count, size)

Definition at line 106 of file OW_WQLOperand.hpp.

Member Enumeration Documentation

enum OW_NAMESPACE::WQLOperand::Type

Defines allowed types of WQL operands (NULL_VALUE, INTEGER_VALUE, DOUBLE_VALUE, BOOLEAN_VALUE, STRING_VALUE, PROPERTY_NAME).

Enumerator:

NULL_VALUE

INTEGER_VALUE

DOUBLE_VALUE

BOOLEAN_VALUE

STRING_VALUE

PROPERTY_NAME

Definition at line 112 of file OW_WQLOperand.hpp.

Constructor & Destructor Documentation

OW_NAMESPACE::WQLOperand::WQLOperand ( ) [inline]

Desfault constructor.
Initializes to null value.
Definition at line 123 of file OW_WQLOperand.hpp.

OW_NAMESPACE::WQLOperand::WQLOperand ( Int64 x,

WQLIntegerValueTag

) [inline]

Initializes object as INTEGER_VALUE.

Definition at line 129 of file OW_WQLOperand.hpp.

OW_NAMESPACE::WQLOperand::WQLOperand ( Real64 x,

WQLDoubleValueTag

) [inline]

Initializes object as DOUBLE_VALUE.

Definition at line 136 of file OW_WQLOperand.hpp.

OW_NAMESPACE::WQLOperand::WQLOperand ( bool x,

WQLBoolValueTag

) [inline]

Initializes object as BOOLEAN_VALUE.

Definition at line 143 of file OW_WQLOperand.hpp.

OW_NAMESPACE::WQLOperand::WQLOperand ( const String & x,

WQLStringValueTag

) [inline]

Initializes object as STRING_VALUE.

Definition at line 150 of file OW_WQLOperand.hpp.

OW_NAMESPACE::WQLOperand::WQLOperand ( const String & x,

WQLPropertyNameTag

) [inline]

Initializes object as PROPERTY_NAME.

Definition at line 157 of file OW_WQLOperand.hpp.

Member Function Documentation

bool OW_NAMESPACE::WQLOperand::getBooleanValue ( ) const [inline]

Gets this object as an BOOLEAN_VALUE.

Exceptions:

TypeMismatchException is not the expected type.

Definition at line 220 of file OW_WQLOperand.hpp.
References OW_THROW.
Referenced by OW_NAMESPACE::WQLSelectStatement::evaluateWhereClause().

Real64 OW_NAMESPACE::WQLOperand::getDoubleValue ( ) const [inline]

Gets this object as an DOUBLE_VALUE.

Exceptions:

TypeMismatchException is not the expected type.

Definition at line 211 of file OW_WQLOperand.hpp.
References OW_THROW.

Int64 OW_NAMESPACE::WQLOperand::getIntegerValue ( ) const [inline]

Gets this object as an INTEGER_VALUE.

Definition at line 202 of file OW_WQLOperand.hpp.
References OW_THROW.

const String& OW_NAMESPACE::WQLOperand::getPropertyName ( ) const [inline]

Gets this object as a PROPERTY_NAME.

Exceptions:

TypeMismatchException is not the expected type.

Definition at line 238 of file OW_WQLOperand.hpp.
References OW_THROW.
Referenced by OW_NAMESPACE::_ResolveProperty(), OW_NAMESPACE::WQLCompile::_ResolveProperty(), and OW_NAMESPACE::WQLSelectStatement::evaluateWhereClause().

const String& OW_NAMESPACE::WQLOperand::getStringValue ( ) const [inline]

Gets this object as a STRING_VALUE.

Exceptions:

TypeMismatchException is not the expected type.

Definition at line 229 of file OW_WQLOperand.hpp.
References OW_THROW.

Type OW_NAMESPACE::WQLOperand::getType ( ) const [inline]

Accessor for getting the type of the operand.

Definition at line 164 of file OW_WQLOperand.hpp.
Referenced by OW_NAMESPACE::_Evaluate(), OW_NAMESPACE::_ResolveProperty(), OW_NAMESPACE::WQLCompile::_ResolveProperty(), OW_NAMESPACE::WQLSelectStatement::evaluateWhereClause(), and OW_NAMESPACE::operator==().

void OW_NAMESPACE::WQLOperand::setBoolValue ( bool x ) [inline]

Sets this object to a BOOLEAN_VALUE.

Definition at line 181 of file OW_WQLOperand.hpp.

void OW_NAMESPACE::WQLOperand::setDoubleValue ( Real64 x ) [inline]

Sets this object to an DOUBLE_VALUE.

Definition at line 174 of file OW_WQLOperand.hpp.

void OW_NAMESPACE::WQLOperand::setIntegerValue ( Int32 x ) [inline]

Sets this object to an INTEGER_VALUE.

Definition at line 167 of file OW_WQLOperand.hpp.

void OW_NAMESPACE::WQLOperand::setPropertyName ( const String & x ) [inline]

Sets this object to a PROPERTY_NAME.

Definition at line 195 of file OW_WQLOperand.hpp.

void OW_NAMESPACE::WQLOperand::setStringValue ( const String & x ) [inline]

Sets this object to a STRING_VALUE.

Definition at line 188 of file OW_WQLOperand.hpp.

String OW_NAMESPACE::WQLOperand::toString ( ) const

Converts this object to a string for output purposes.

Definition at line 39 of file OW_WQLOperand.cpp.
References _booleanValue, _doubleValue, _integerValue, _string, _type, BOOLEAN_VALUE, DOUBLE_VALUE, INTEGER_VALUE, PROPERTY_NAME, result, and STRING_VALUE.

Member Data Documentation

bool OW_NAMESPACE::WQLOperand::_booleanValue [private]

Definition at line 252 of file OW_WQLOperand.hpp.
Referenced by toString().

Real64 OW_NAMESPACE::WQLOperand::_doubleValue [private]

Definition at line 251 of file OW_WQLOperand.hpp.
Referenced by toString().

Int64 OW_NAMESPACE::WQLOperand::_integerValue [private]

Definition at line 250 of file OW_WQLOperand.hpp.
Referenced by toString().

String OW_NAMESPACE::WQLOperand::_string [private]

Definition at line 254 of file OW_WQLOperand.hpp.
Referenced by toString().

Type OW_NAMESPACE::WQLOperand::_type [private]

Definition at line 255 of file OW_WQLOperand.hpp.
Referenced by toString().

The documentation for this class was generated from the following files:

Generated on Thu Feb 9 09:16:56 2006 for openwbem by

1.4.6

OW_NAMESPACE::WQLOperand Class Reference

Public Types

Public Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation