IliValue Class Reference

User interface class. More...

#include <ilviews/dataccess/value.h>

Inherited by IliCBValue.

Public Member Functions
	IliValue ()
	This constructor creates a null value, with an initial type of IliNullType.
	IliValue (const IliDatatype *type)
	This constructor initializes a null value, with an initial type. More...
	IliValue (const IliValue &val)
	Copy constructor. More...
	IliValue (const char *val)
	Constructor from string. More...
	IliValue (IliByte val)
	Constructor from IliByte. More...
	IliValue (IlInt val)
	Constructor from integer value. More...
	IliValue (IlFloat val)
	Constructor from float value. More...
	IliValue (IlDouble val)
	Constructor from double value. More...
	IliValue (const IliDecimal &val)
	Constructor from IliDecimal value. More...
	IliValue (const IliDate &val)
	Constructor from date value. More...
	IliValue (const IliTime &val)
	Constructor from time value. More...
	IliValue (const IliBinary &val)
	Constructor from binary value. More...
	IliValue (const IliTable *val)
	Constructor from table. More...
	IliValue (IlAny val)
	Constructor from any. More...
IlAny	asAny (IlAny nvl=0) const
	Returns an any value. More...
IliBinary	asBinary (const IliBinary &nvl=IliBinary::GetDefault()) const
	Returns a binary value. More...
IlBoolean	asBoolean (IlBoolean nvl=IlFalse) const
	Returns a Boolean value. More...
IliByte	asByte (IliByte nvl=0) const
	Returns a byte value. More...
IliDate	asDate (const IliDate &nvl=IliDate::GetDefault()) const
	Returns a date value. More...
IliDecimal	asDecimal (const IliDecimal &nvl) const
	Returns a decimal value. More...
IliDecimal	asDecimal () const
	Returns a decimal value. More...
IlDouble	asDouble (IlDouble nvl=0.0) const
	Returns a double value. More...
IlFloat	asFloat (IlFloat nvl=0.0) const
	Returns a float value. More...
IlInt	asInteger (IlInt nvl=0) const
	Returns an integer value. More...
const char *	asString (const char *nvl=0) const
	Returns a string value. More...
const IliTable *	asTable (const IliTable *nvl=0) const
	Returns a table value. More...
IliTime	asTime (const IliTime &nvl=IliTime::GetDefault()) const
	Returns a time value. More...
int	compare (const IliValue &val) const
	Compares two values. More...
void	format (IliString &dest, const IliFormat &fmt) const
	Returns a formatted string. More...
void	format (IliString &dest, const char *fmt=0) const
	Returns a formatted string. More...
void	format (IliString &dest, const IliFormat &fmt, const IliInputMask &mask) const
	Returns a formatted string by a mask. More...
const char *	getFormatted (const IliFormat &fmt) const
	Returns a formatted string. More...
const char *	getFormatted (const char *fmt=0) const
	Returns a formatted string. More...
const char *	getFormatted (const IliFormat &fmt, const IliInputMask &mask) const
	Returns a formatted string. More...
const IliDatatype *	getType () const
	Returns data type. More...
IlBoolean	import (const IliValue &val)
	Imports an IliValue value. More...
IlBoolean	importAny (IlAny val)
	Imports an any value. More...
IlBoolean	importBinary (const IliBinary &val)
	Imports a binary value. More...
IlBoolean	importBoolean (IlBoolean val)
	Imports a Boolean value. More...
IlBoolean	importByte (IliByte val)
	Imports a byte value. More...
IlBoolean	importDate (const IliDate &val)
	Imports a date value. More...
IlBoolean	importDecimal (const IliDecimal &val)
	Imports a decimal value. More...
IlBoolean	importDouble (IlDouble val)
	Imports a double value. More...
IlBoolean	importFloat (IlFloat val)
	Imports a float value. More...
IlBoolean	importInteger (IlInt val)
	Imports an integer value. More...
IlBoolean	importString (const char *val, IlUInt len=IliNTS)
	Imports a string value. More...
IlBoolean	importTable (const IliTable *val)
	Imports a table value. More...
IlBoolean	importTime (const IliTime &val)
	Imports a time value. More...
IlBoolean	isModified () const
	Returns modified state. More...
IlBoolean	isNull () const
	Returns IlTrue if the value is null. More...
	operator const char * () const
	Returns a string value. More...
	operator const IliTable * () const
	Returns an IliTable value. More...
	operator IlAny () const
	Returns an IlAny value. More...
	operator IlDouble () const
	Returns a double value. More...
	operator IlFloat () const
	Returns a float value. More...
	operator IliBinary () const
	Returns an IliBinary value. More...
	operator IliByte () const
	Returns an IliByte value. More...
	operator IliDate () const
	Returns an IliDate value. More...
	operator IliDecimal () const
	Returns an IliDecimal value. More...
	operator IlInt () const
	Returns an integer value. More...
	operator IliTime () const
	Returns an IliTime value. More...
int	operator!= (const IliValue &val) const
	Operator !=. More...
int	operator< (const IliValue &val) const
	Operator <. More...
int	operator<= (const IliValue &val) const
	Operator <=. More...
IliValue &	operator= (const IliValue &val)
	Assigns an IliValue. More...
IliValue &	operator= (const char *val)
	Assigns a string. More...
IliValue &	operator= (IliByte val)
	Assigns an IliByte. More...
IliValue &	operator= (IlInt val)
	Assigns an integer. More...
IliValue &	operator= (IlFloat val)
	Assigns a float. More...
IliValue &	operator= (IlDouble val)
	Assigns a double. More...
IliValue &	operator= (const IliDecimal &val)
	Assigns an IliDecimal. More...
IliValue &	operator= (const IliDate &val)
	Assigns an IliDate. More...
IliValue &	operator= (const IliTime &val)
	Assigns an IliTime. More...
IliValue &	operator= (const IliBinary &val)
	Assigns an IliBinary. More...
IliValue &	operator= (const IliTable *val)
	Assigns an IliTable. More...
IliValue &	operator= (IlAny val)
	Assigns an IlAny. More...
int	operator== (const IliValue &val) const
	Operator ==. More...
int	operator> (const IliValue &val) const
	Operator > More...
int	operator>= (const IliValue &val) const
	Operator >=. More...
void	read (IL_STDPREF istream &input)
	Reads from input stream. More...
void	setModified (IlBoolean modified)
	Sets modified state. More...
void	setNull (const IliDatatype *type=0)
	Sets null. More...
void	write (IL_STDPREF ostream &output) const
	Writes to output stream. More...

Friends
class	IliDatatype

Detailed Description

User interface class.

Library: dataccess

The purpose of the IliValue class is to support polymorphism for the most primitive data types, such as character string, integer, and float. An IliValue object can hold a value belonging to any of these primitive types. Moreover, the type of this value can be changed dynamically. The IliDatatype class is used to represent the dynamic type of an IliValue object.

About Comparison These operators and the member function described in this section compare two values according to the following rules:

• If the two values have the same dynamic type, the comparison is relative to that type.

If both types differ:

• and they are both numeric, the values are first converted to IlDouble and the comparison carried out on the IlDouble values.
• and they are not numeric, the values are considered not comparable.

When both types are equal or numeric:

• if one of the values is null and the other is not null, then the null value is considered less than the non null value.
• if both values are null they are equal.

See Also

IliDatatype, IliDate, IliFormat, IliString, IliBinary, IliByte, IliNTS

Constructor & Destructor Documentation

IliValue::IliValue

(

const IliDatatype *

type

)

This constructor initializes a null value, with an initial type.

Parameters

type	The data type.

IliValue::IliValue

(

const IliValue &

val

)

Copy constructor.

This is the copy constructor of class IliValue.

Parameters

val	The value.

IliValue::IliValue

(

const char *

val

)

Constructor from string.

This constructor creates a value of type IliStringType, initialized with a copy of str. If str is NULL or empty, the constructed value will be null.

Parameters

val	The string value.

IliValue::IliValue

(

IliByte

val

)

Constructor from IliByte.

This constructor creates a value of type IliByteType, initialized with byte.

Parameters

val	The IliByte value.

IliValue::IliValue

(

IlInt

val

)

Constructor from integer value.

This constructor creates a value of type IliIntegerType, initialized with i.

Parameters

val	The integer value.

IliValue::IliValue

(

IlFloat

val

)

Constructor from float value.

This constructor creates a value of type IliFloatType, initialized with f.

Parameters

val	The float value.

IliValue::IliValue

(

IlDouble

val

)

Constructor from double value.

This constructor creates a value of type IliDoubleType, initialized with d.

Parameters

val	The double value.

IliValue::IliValue

(

const IliDecimal &

val

)

Constructor from IliDecimal value.

This constructor creates a value of type IliDecimalType, initialized with dec.

Parameters

val	The IliDecimal value.

IliValue::IliValue

(

const IliDate &

val

)

Constructor from date value.

This constructor creates a value of type IliDateType, initialized with a copy of date.

Parameters

val	The date value

IliValue::IliValue

(

const IliTime &

val

)

Constructor from time value.

This constructor creates a value of type IliTimeType, initialized with a copy of time.

Parameters

val	The time value.

IliValue::IliValue

(

const IliBinary &

val

)

Constructor from binary value.

This constructor creates a value of type IliBinaryType, initialized with a copy of binary.

Parameters

val	The binary value.

IliValue::IliValue

(

const IliTable *

val

)

Constructor from table.

This constructor creates a value of structured type, initialized with a copy of tbl.

Parameters

val

The table

IliValue::IliValue

(

IlAny

val

)

Constructor from any.

This constructor creates a value of type IliAnyType, initialized with any.

Parameters

val	The any value.

Member Function Documentation

IlAny IliValue::asAny

(

IlAny

nvl = 0

)

const

Returns an any value.

Parameters

nvl	The default value.

Returns

The nvl parameter if the IliValue object is null, or if its type is not IliAnyType. Otherwise, the pointer value is returned.

IliBinary IliValue::asBinary

(

const IliBinary &

nvl = IliBinary::GetDefault()

)

const

Returns a binary value.

Parameters

nvl	The default value.

Returns

A default IliBinary object if the IliValue object is null, or if its type is not IliBinaryType. Otherwise, the binary value is returned.

IlBoolean IliValue::asBoolean

(

IlBoolean

nvl = IlFalse

)

const

Returns a Boolean value.

Parameters

nvl	The default value.

Returns

• If the IliValue object is null, the nvl parameter is returned;
• If the type of the IliValue object is numeric, the numeric value is returned;
• If the type of the IliValue object is IliStringType, and if the character string value represents a number, that number is returned. In this case the application settings concerning the decimal point character are used to determine whether the character string represents a number.
• Otherwise, the nvl parameter is returned.

IliByte IliValue::asByte

(

IliByte

nvl = 0

)

const

Returns a byte value.

Parameters

nvl	The default value.

Returns

• If the IliValue object is null, the nvl parameter is returned;
• If the type of the IliValue object is numeric, the numeric value is returned;
• If the type of the IliValue object is IliStringType, and if the character string value represents a number, that number is returned. In this case the application settings concerning the decimal point character are used to determine whether the character string represents a number.
• Otherwise, the nvl parameter is returned.

IliDate IliValue::asDate

(

const IliDate &

nvl = IliDate::GetDefault()

)

const

Returns a date value.

Parameters

nvl	The default value.

Returns

The nvl parameter if the IliValue object is null. Otherwise, if the type of the IliValue object is IliDateType, the date value is returned.

However, if the type is IliStringType, and if the character string value represents a date (according to the application settings concerning the date and time separators, the month-day default order, and the current language), this date is returned. Otherwise, the nvl parameter is returned.

IliDecimal IliValue::asDecimal

(

const IliDecimal &

nvl

)

const

Returns a decimal value.

Parameters

nvl	The default value.

Returns

• If the IliValue object is null, the nvl parameter is returned;
• If the type of the IliValue object is numeric, the numeric value is returned;
• If the type of the IliValue object is IliStringType, and if the character string value represents a number, that number is returned. In this case the application settings concerning the decimal point character are used to determine whether the character string represents a number.
• Otherwise, the nvl parameter is returned.

IliDecimal IliValue::asDecimal

(

)

const

Returns a decimal value.

Returns

• If the IliValue object is null, a null numeric is returned;
• If the type of the IliValue object is numeric, the numeric value is returned;
• If the type of the IliValue object is IliStringType, and if the character string value represents a number, that number is returned. In this case the application settings concerning the decimal point character are used to determine whether the character string represents a number.
• Otherwise, a null numeric is returned.

IlDouble IliValue::asDouble

(

IlDouble

nvl = 0.0

)

const

Returns a double value.

Parameters

nvl	The default value.

Returns

• If the IliValue object is null, the nvl parameter is returned;
• If the type of the IliValue object is numeric, the numeric value is returned;
• If the type of the IliValue object is IliStringType, and if the character string value represents a number, that number is returned. In this case the application settings concerning the decimal point character are used to determine whether the character string represents a number.
• Otherwise, the nvl parameter is returned.

IlFloat IliValue::asFloat

(

IlFloat

nvl = 0.0

)

const

Returns a float value.

Parameters

nvl	The default value.

Returns

• If the IliValue object is null, the nvl parameter is returned;
• If the type of the IliValue object is numeric, the numeric value is returned;
• If the type of the IliValue object is IliStringType, and if the character string value represents a number, that number is returned. In this case the application settings concerning the decimal point character are used to determine whether the character string represents a number.
• Otherwise, the nvl parameter is returned.

IlInt IliValue::asInteger

(

IlInt

nvl = 0

)

const

Returns an integer value.

Parameters

nvl	The default value.

Returns

• If the IliValue object is null, the nvl parameter is returned;
• If the type of the IliValue object is numeric, the numeric value is returned;
• If the type of the IliValue object is IliStringType, and if the character string value represents a number, that number is returned. In this case the application settings concerning the decimal point character are used to determine whether the character string represents a number.
• Otherwise, the nvl parameter is returned.

const char* IliValue::asString

(

const char *

nvl = 0

)

const

Returns a string value.

Parameters

nvl	The default value.

Returns

A pointer to its character string value, provided that the IliValue object is not null, and that its type is IliStringType. Otherwise, this cast operator returns the nvl parameter.

const IliTable* IliValue::asTable

(

const IliTable *

nvl = 0

)

const

Returns a table value.

Parameters

nvl	The default value.

Returns

The nvl parameter if the IliValue object is null or if its type is not a structured type, is returned. Otherwise, the table value is returned.

IliTime IliValue::asTime

(

const IliTime &

nvl = IliTime::GetDefault()

)

const

Returns a time value.

Parameters

nvl	The default value.

Returns

The nvl parameter if the IliValue object is null, this member function returns the nvl parameter. Otherwise, if the type of the IliValue object is IliTimeType, the time value is returned.

However, if the type is IliStringType, and if the character string value represents a time (according to the application settings concerning time separators), this time is returned. Otherwise, the nvl parameter is returned.

int IliValue::compare

(

const IliValue &

val

)

const

Compares two values.

Parameters

val	The second value.

Returns

+1 if this object is greater than the other object or if both values are not comparable 0 if both objects are equal, and -1 if this object is less than the other object. For an explanation on how the comparison is carried out, see the description of the comparison operators above.

void IliValue::format	(	IliString &	dest,
		const IliFormat &	fmt
	)		const

Returns a formatted string.

Parameters

dest	Contains the formatted string.
fmt	The format.

Returns

The character string representation of the value according to the fmt format. The return value should be used as soon as possible, since it belongs to a static buffer. It may be overwritten without warning, the next time this member function is called.

void IliValue::format	(	IliString &	dest,
		const char *	fmt = 0
	)		const

Returns a formatted string.

Parameters

dest	Contains the formatted string.
fmt	The format definition.

Returns

The character string representation of the value according to the fmt format definition. The return value should be used as soon as possible, since it belongs to a static buffer. It may be overwritten without warning, the next time this member function is called.

void IliValue::format	(	IliString &	dest,
		const IliFormat &	fmt,
		const IliInputMask &	mask
	)		const

Returns a formatted string by a mask.

Appends the representation of the value to the dest string. If the mask parameter is not the null input mask, then it is used to do the formatting (and the mask parameter is not used.) Otherwise, the fmt parameter is used to do the formatting.

Parameters

dest	Contains the formatted string.
fmt	The format.
mask	The mask.

const char* IliValue::getFormatted

(

const IliFormat &

fmt

)

const

Returns a formatted string.

Parameters

fmt	The format.

Returns

The character string representation of the value according to the fmt format definition. The return value should be used as soon as possible, since it belongs to a static buffer. It may be overwritten without warning, the next time this member function is called.

const char* IliValue::getFormatted

(

const char *

fmt = 0

)

const

Returns a formatted string.

Parameters

fmt	The format definition.

Returns

The character string representation of the value according to the fmt format definition. The return value should be used as soon as possible since it belongs to a static buffer. It may be overwritten without warning, the next time this member function is called.

const char* IliValue::getFormatted	(	const IliFormat &	fmt,
		const IliInputMask &	mask
	)		const

Returns a formatted string.

Parameters

fmt	The format.
mask	The mask.

Returns

The character string representation of the value according to the mask parameter if it is not the null input mask. Otherwise, it returns the character string representation of the value according to the fmt parameter. The return value should be used as soon as possible, since it belongs to a static buffer.

const IliDatatype * IliValue::getType

(

)

const

Returns data type.

Returns

The dynamic of the IliValue object.

IlBoolean IliValue::import

(

const IliValue &

val

)

Imports an IliValue value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importAny

(

IlAny

val

)

Imports an any value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importBinary

(

const IliBinary &

val

)

Imports a binary value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importBoolean

(

IlBoolean

val

)

Imports a Boolean value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importByte

(

IliByte

val

)

Imports a byte value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importDate

(

const IliDate &

val

)

Imports a date value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importDecimal

(

const IliDecimal &

val

)

Imports a decimal value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importDouble

(

IlDouble

val

)

Imports a double value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importFloat

(

IlFloat

val

)

Imports a float value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importInteger

(

IlInt

val

)

Imports an integer value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importString	(	const char *	val,
		IlUInt	len = IliNTS
	)

Imports a string value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.
len	The maximum length.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importTable

(

const IliTable *

val

)

Imports a table value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::importTime

(

const IliTime &

val

)

Imports a time value.

The conversion member function is similar to the assignment operator, except that they do not change the type of the IliValue object. Instead, they attempt to convert their parameter to the current type of the IliValue object.

Parameters

val	The imported value.

Returns

IlTrue if the conversion succeeded. The modified property of the IliValue object will also be set to IlTrue if successful.

IlBoolean IliValue::isModified

(

)

const

Returns modified state.

Returns

IlTrue if the value has been modified, since the last time the setModified member function was called with an IlFalse parameter.

IlBoolean IliValue::isNull

(

)

const

Returns IlTrue if the value is null.

Returns

IlTrue if the value is null.

IliValue::operator const char *

(

)

const

Returns a string value.

Returns

A pointer to its character string value, provided the IliValue object is not null and that its type is IliStringType. Otherwise, this cast operator returns null.

IliValue::operator const IliTable *

(

)

const

Returns an IliTable value.

Returns

NULL if the IliValue object is null or if its type is not a structured type. Otherwise, the table value is returned.

IliValue::operator IlAny

(

)

const

Returns an IlAny value.

Returns

0 if the IliValue object is null or if its type is not IliAnyType. Otherwise, the pointer value is returned.

IliValue::operator IlDouble

(

)

const

Returns a double value.

Returns

0 if the object is null. If the object type is numeric, the numeric value is returned. If the object type is IliStringType and if the string value represents a number, that number is returned. In this case, the application settings concerning the decimal point character are used to determine whether the string represents a number. Otherwise, 0 is returned.

IliValue::operator IlFloat

(

)

const

Returns a float value.

Returns

0 if the object is null. If the object type is numeric, the numeric value is returned. If the object type is IliStringType and if the string value represents a number, that number is returned. In this case, the application settings concerning the decimal point character are used to determine whether the string represents a number. Otherwise, 0 is returned.

IliValue::operator IliBinary

(

)

const

Returns an IliBinary value.

Returns

A default IliBinary object if the IliValue object is null or if its type is not IliBinaryType. Otherwise, the binary value is returned.

IliValue::operator IliByte

(

)

const

Returns an IliByte value.

Returns

0 if the object is null. If the object type is numeric, the numeric value is returned. If the object type is IliStringType and if the string value represents a number, that number is returned. In this case, the application settings concerning the decimal point character are used to determine whether the string represents a number. Otherwise, 0 is returned.

IliValue::operator IliDate

(

)

const

Returns an IliDate value.

Returns

A default date object if the IliValue object is null. Otherwise, if the type of the IliValue object is IliDateType, the date value is returned.

However, if the type is IliStringType and if the character string value represents a date (according to the application settings concerning the date and time separators, the month-day default order, and the current language) then this date is returned. Otherwise, a default date object is returned.

IliValue::operator IliDecimal

(

)

const

Returns an IliDecimal value.

Returns

0 if the object is null. If the object type is numeric, the numeric value is returned. If the object type is IliStringType and if the string value represents a number, that number is returned. In this case, the application settings concerning the decimal point character are used to determine whether the string represents a number. Otherwise, 0 is returned.

IliValue::operator IlInt

(

)

const

Returns an integer value.

Returns

0 if the object is null. If the object type is numeric, the numeric value is returned. If the object type is IliStringType and if the string value represents a number, that number is returned. In this case, the application settings concerning the decimal point character are used to determine whether the string represents a number. Otherwise, 0 is returned.

IliValue::operator IliTime

(

)

const

Returns an IliTime value.

Returns

A default time object if the IliValue object is null. Otherwise, if the type of the IliValue object is IliTimeType, the time value is returned.

However, if the type is IliStringType and if the character string value represents a time (according to the application settings concerning the time separators) then this time is returned. Otherwise, a default time object is returned.

int IliValue::operator!=

(

const IliValue &

val

)

const

Operator !=.

Parameters

val	The second value.

Returns

0 if both values are equal and 1 otherwise.

int IliValue::operator<

(

const IliValue &

val

)

const

Operator <.

Parameters

val	The second value.

Returns

1 if the value on the left hand side of the operator is less than the value on the right hand side or if the values are not comparable, and returns 0 otherwise.

int IliValue::operator<=

(

const IliValue &

val

)

const

Operator <=.

Parameters

val	The second value.

Returns

1 if the value on the left hand side of the operator is less than or equal to the value on the right hand side or if the values cannot be compared, and returns 0 otherwise.

IliValue& IliValue::operator=

(

const IliValue &

val

)

Assigns an IliValue.

This operator assigns a new value of IliValue type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

const char *

val

)

Assigns a string.

This operator assigns a new value of string type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

IliByte

val

)

Assigns an IliByte.

This operator assigns a new value of IliByte type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

IlInt

val

)

Assigns an integer.

This operator assigns a new value of integer type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

IlFloat

val

)

Assigns a float.

This operator assigns a new value of float type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

IlDouble

val

)

Assigns a double.

This operator assigns a new value of double type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

const IliDecimal &

val

)

Assigns an IliDecimal.

This operator assigns a new value of IliDecimal type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

const IliDate &

val

)

Assigns an IliDate.

This operator assigns a new value of IliDate type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

const IliTime &

val

)

Assigns an IliTime.

This operator assigns a new value of IliTime type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

const IliBinary &

val

)

Assigns an IliBinary.

This operator assigns a new value of IliBinary type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue& IliValue::operator=

(

const IliTable *

val

)

Assigns an IliTable.

This operator assigns a new value of IliTable type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

IliValue & IliValue::operator=

(

IlAny

val

)

Assigns an IlAny.

This operator assigns a new value of IlAny type. The modified property of the object is set to IlTrue.

Parameters

val	The value.

Returns

The modified object.

int IliValue::operator==

(

const IliValue &

val

)

const

Operator ==.

Parameters

val	The second value.

Returns

1 if both values are equal and 0 otherwise.

int IliValue::operator>

(

const IliValue &

val

)

const

Operator >

Parameters

val	The second value.

Returns

1 if the value on the left hand side of the operator is greater than the value on the right hand side or if the values cannot be compared, and returns 0 otherwise.

int IliValue::operator>=

(

const IliValue &

val

)

const

Operator >=.

Parameters

val	The second value.

Returns

1 if the value on the left hand side of the operator is greater than or equal to the value on the right hand side or if the values cannot be compared, and returns 0 otherwise.

void IliValue::read

(

IL_STDPREF istream &

input

)

Reads from input stream.

Reads the definition of an IliValue object from an input stream.

Parameters

input

The input stream

void IliValue::setModified

(

IlBoolean

modified

)

Sets modified state.

Sets the modified property of the value to IlTrue.

Parameters

modified

The modified state.

void IliValue::setNull

(

const IliDatatype *

type = 0

)

Sets null.

Changes the dynamic type of the IliValue object to type. The value itself is then set to null, whether the type is NULL or not.

Parameters

type	New data type.

void IliValue::write

(

IL_STDPREF ostream &

output

)

const

Writes to output stream.

Writes the definition of an IliValue object to an output stream, in a form suitable to be read back by the read member function.

Parameters

output

The output stream