FunctFloorExpression Class Reference

Represents XQuery standard function fn:floor. More...

#include <functfloorexpression.h>

Inheritance diagram for FunctFloorExpression:

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Collaboration diagram for FunctFloorExpression:

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List of all members.

Public Member Functions
	FunctFloorExpression (AggregateFunctExpression *_aggfunct)
	Constructor.
virtual	~FunctFloorExpression ()
virtual void	eval (OutputStream &eos, Environment *env, unsigned modus)
Private Member Functions
virtual long double	calculateValue (OutputStream &eos, Environment *env, unsigned modus, bool &non_value)

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Detailed Description

Represents XQuery standard function fn:floor.

Represents XQuery standard function fn:floor, which takes a AggregateFunctExpression, e.g. fn:floor(fn:count($x/bib/book)) or fn:floor(fn:sum(/bib//book)), as argument and returns the floor result of the entered AggregateFunctExpression.

Author:

Michael Schmidt

Gunnar Jehl

Version:

2.1

License:

Software License Agreement (BSD License)

Definition at line 61 of file functfloorexpression.h.

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Constructor & Destructor Documentation

FunctFloorExpression::FunctFloorExpression

(

AggregateFunctExpression *

_aggfunct

)

Constructor.

Constructor - creating object for a AggregateFunctExpression.

Parameters:

[in]

_aggfunct

Pointer to a AggregateFunctExpression object.

Definition at line 37 of file functfloorexpression.cpp.

FunctFloorExpression::~FunctFloorExpression

(

)

[virtual]

Destructor.

Definition at line 41 of file functfloorexpression.cpp.

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Member Function Documentation

long double FunctFloorExpression::calculateValue	(	OutputStream &	eos,
		Environment *	env,
		unsigned	modus,
		bool &	non_value
	)			[private, virtual]

Result calculation of the corresponding rounding function.

Result calculation of the corresponding rounding function.

Parameters:

[in]	eos	Pointer to a OutputStream object.
[in]	env	Pointer to a Environment object.
[in]	modus	Evaluation modus.
[in]	non_value	Indicator if rounding function is called on an non value, i.e. is called on an empty sequence of the corresponding aggregate function.

Return values:

long

double Result of the corresponding rounding function.

Implements RoundingExpression.

Definition at line 93 of file functfloorexpression.cpp.

References RoundingExpression::aggfunct, AggregateFunctExpression::getNextValue(), Value::getNumVal(), Value::getType(), AggregateFunctExpression::prepareOperand(), and AggregateFunctExpression::unprepareOperand().

Referenced by eval().

void FunctFloorExpression::eval	(	OutputStream &	eos,
		Environment *	env,
		unsigned	modus
	)			[virtual]

Evaluates the expression in the given environment.

Evaluates the expression in the given environment. The evaluation takes place in the environment that is passed to this method. In addition, the parameter modus is one of the following: EVAL_QUERY, EVAL_QUERY_SILENT or EVAL_SIGNOFF (see also the corresponding defines for more information). This method implements the XQuery semantics for the standard expression types, but also the GCX specific extensions like signOff-statements.

Parameters:

[in]	eos	Pointer to a OutputStream object.
[in]	env	Pointer to an Environment object.
[in]	modus	The query evaluation mode.

Exceptions:

RuntimeException

If illegal evaluation mode.

Implements RoundingExpression.

Definition at line 44 of file functfloorexpression.cpp.

References calculateValue(), OperandExpression::cur_val, EVAL_QUERY, EVAL_QUERY_SILENT, EVAL_SIGNOFF, MiscFunctions::getStringFromNumerical(), OUTPUT_FLOOR_ON_NON_VALUE, Value::setNumVal(), and Value::setStrVal().