ComputedExpression represents an XPath Expression and caches results. More...

#include <computedexpression.hxx>

Inheritance diagram for xforms::ComputedExpression:

Public Member Functions
	ComputedExpression ()

	~ComputedExpression ()

const OUString &	getExpression () const
	get the expression string More...

void	setExpression (const OUString &rExpression)
	set a new expression string More...

bool	isEmptyExpression () const
	do we have an actual expression? More...

bool	isSimpleExpression () const
	heuristically determine whether this expression is 'simple', i.e. More...

bool	evaluate (const xforms::EvaluationContext &rContext)
	evaluate the expression relative to the content node. More...

bool	hasValue () const
	does this expression have a value? More...

void	clear ()
	remove value/evaluate results More...

css::uno::Reference< css::xml::xpath::XXPathObject > const &	getXPath () const

bool	getBool (bool bDefault=false) const

OUString	getString () const

Protected Member Functions
bool	_checkExpression (const char *pExpression) const
	implementation of isSimpleExpression More...

const OUString &	_getExpressionForEvaluation () const
	allow manipulation of the expression before it is evaluated More...

bool	_evaluate (const xforms::EvaluationContext &rContext, const OUString &sExpression)
	evaluate the expression relative to the content node. More...

Static Protected Member Functions
static css::uno::Reference< css::xml::xpath::XXPathAPI >	_getXPathAPI (const xforms::EvaluationContext &aContext)
	obtain a (suitable) XPathAPI implementation More...

Protected Attributes
bool	mbIsSimple
	is msExpression a simple expression? More...

css::uno::Reference< css::xml::xpath::XXPathObject >	mxResult
	the result from the last bind More...

Private Attributes
OUString	msExpression
	the expression string More...

bool	mbIsEmpty
	is msExpression empty? More...

Detailed Description

ComputedExpression represents an XPath Expression and caches results.

As this class has no virtual methods, it should never be used polymorphically.

Definition at line 47 of file computedexpression.hxx.

Constructor & Destructor Documentation

◆ ComputedExpression()

xforms::ComputedExpression::ComputedExpression ( )

Definition at line 46 of file computedexpression.cxx.

◆ ~ComputedExpression()

xforms::ComputedExpression::~ComputedExpression ( )

Definition at line 52 of file computedexpression.cxx.

Member Function Documentation

◆ _checkExpression()

bool xforms::ComputedExpression::_checkExpression ( const char * pExpression ) const

protected

implementation of isSimpleExpression

Definition at line 67 of file computedexpression.cxx.

References i18nutil::SearchOptions2::AlgorithmType2, msExpression, nLength, utl::TextSearch::SearchForward(), and i18nutil::SearchOptions2::searchString.

Referenced by xforms::BoolExpression::setExpression(), setExpression(), and xforms::PathExpression::setExpression().

◆ _evaluate()

bool xforms::ComputedExpression::_evaluate	(	const xforms::EvaluationContext &	rContext,
		const OUString &	sExpression
	)

protected

evaluate the expression relative to the content node.

Definition at line 95 of file computedexpression.cxx.

References _getXPathAPI(), Exception, hasValue(), xforms::EvaluationContext::mxContextNode, and mxResult.

Referenced by evaluate(), and xforms::PathExpression::evaluate().

◆ _getExpressionForEvaluation()

const OUString & xforms::ComputedExpression::_getExpressionForEvaluation ( ) const

inlineprotected

allow manipulation of the expression before it is evaluated

Definition at line 68 of file computedexpression.hxx.

References msExpression.

Referenced by xforms::PathExpression::_getExpressionForEvaluation(), and evaluate().

◆ _getXPathAPI()

Reference< XXPathAPI > xforms::ComputedExpression::_getXPathAPI ( const xforms::EvaluationContext & aContext )

staticprotected

obtain a (suitable) XPathAPI implementation

Definition at line 150 of file computedexpression.cxx.

References comphelper::getProcessComponentContext(), i, xforms::EvaluationContext::mxContextNode, xforms::EvaluationContext::mxModel, xforms::EvaluationContext::mxNamespaces, and nCount.

Referenced by _evaluate().

◆ clear()

void xforms::ComputedExpression::clear ( )

remove value/evaluate results

Definition at line 133 of file computedexpression.cxx.

References mxResult.

Referenced by xforms::Binding::clear(), and xforms::Binding::update().

◆ evaluate()

bool xforms::ComputedExpression::evaluate ( const xforms::EvaluationContext & rContext )

evaluate the expression relative to the content node.

Definition at line 116 of file computedexpression.cxx.

References _evaluate(), _getExpressionForEvaluation(), mbIsEmpty, mbIsSimple, and mxResult.

Referenced by xforms::Binding::bind(), xforms::Submission::doSubmit(), and xforms::Model::getResultForExpression().

◆ getBool()

bool xforms::ComputedExpression::getBool ( bool bDefault = false ) const

Definition at line 144 of file computedexpression.cxx.

References mxResult.

Referenced by xforms::Binding::getLocalMIP().

◆ getExpression()

const OUString & xforms::ComputedExpression::getExpression ( ) const

inline

get the expression string

Definition at line 84 of file computedexpression.hxx.

References msExpression.

Referenced by xforms::Binding::bind(), xforms::Submission::doSubmit(), xforms::Binding::explainInvalid(), xforms::Binding::getBindingExpression(), xforms::Binding::getCalculateExpression(), xforms::Binding::getConstraintExpression(), xforms::Binding::getReadonlyExpression(), xforms::Submission::getRef(), xforms::Binding::getRelevantExpression(), and xforms::Binding::getRequiredExpression().

◆ getString()

OUString xforms::ComputedExpression::getString ( ) const

Definition at line 139 of file computedexpression.cxx.

References mxResult.

Referenced by xforms::Binding::bind(), xforms::Binding::explainInvalid(), xforms::Binding::explainInvalid_DataType(), xforms::Binding::getValue(), xforms::Binding::isValid(), and xforms::Binding::isValid_DataType().

◆ getXPath()

css::uno::Reference< css::xml::xpath::XXPathObject > const & xforms::ComputedExpression::getXPath ( ) const

inline

Definition at line 113 of file computedexpression.hxx.

References mxResult.

Referenced by xforms::Submission::doSubmit(), and xforms::Model::getResultForExpression().

◆ hasValue()

bool xforms::ComputedExpression::hasValue ( ) const

does this expression have a value?

Definition at line 127 of file computedexpression.cxx.

References mxResult.

Referenced by _evaluate(), xforms::Binding::explainInvalid(), xforms::Binding::getLocalMIP(), xforms::Binding::getValue(), xforms::Binding::getXNodeList(), xforms::Binding::isValid(), and xforms::Binding::setValue().

◆ isEmptyExpression()

bool xforms::ComputedExpression::isEmptyExpression ( ) const

inline

do we have an actual expression?

Definition at line 90 of file computedexpression.hxx.

References mbIsEmpty.

Referenced by xforms::Binding::bind(), xforms::Binding::getLocalMIP(), and xforms::Binding::isUseful().

◆ isSimpleExpression()

bool xforms::ComputedExpression::isSimpleExpression ( ) const

heuristically determine whether this expression is 'simple', i.e.

whether its value will change depending on the values of other nodes

Definition at line 88 of file computedexpression.cxx.

References mbIsEmpty, and mbIsSimple.

Referenced by xforms::PathExpression::evaluate(), xforms::Binding::isSimpleBinding(), and xforms::Binding::isSimpleBindingExpression().

◆ setExpression()

void xforms::ComputedExpression::setExpression ( const OUString & rExpression )

set a new expression string

Definition at line 57 of file computedexpression.cxx.

References _checkExpression(), mbIsEmpty, mbIsSimple, msExpression, and mxResult.

Referenced by xforms::Submission::doSubmit(), xforms::Model::getResultForExpression(), xforms::Binding::setCalculateExpression(), xforms::BoolExpression::setExpression(), xforms::PathExpression::setExpression(), and xforms::Submission::setRef().

Member Data Documentation

◆ mbIsEmpty

bool xforms::ComputedExpression::mbIsEmpty

private

is msExpression empty?

Definition at line 53 of file computedexpression.hxx.

Referenced by evaluate(), isEmptyExpression(), isSimpleExpression(), and setExpression().

◆ mbIsSimple

bool xforms::ComputedExpression::mbIsSimple

protected

is msExpression a simple expression?

Definition at line 57 of file computedexpression.hxx.

Referenced by evaluate(), isSimpleExpression(), xforms::BoolExpression::setExpression(), setExpression(), and xforms::PathExpression::setExpression().

◆ msExpression

OUString xforms::ComputedExpression::msExpression

private

the expression string

Definition at line 50 of file computedexpression.hxx.

Referenced by _checkExpression(), _getExpressionForEvaluation(), getExpression(), and setExpression().

◆ mxResult

css::uno::Reference<css::xml::xpath::XXPathObject> xforms::ComputedExpression::mxResult

protected

the result from the last bind

Definition at line 60 of file computedexpression.hxx.

Referenced by _evaluate(), clear(), evaluate(), xforms::PathExpression::evaluate(), getBool(), getString(), xforms::PathExpression::getXNodeList(), getXPath(), hasValue(), and setExpression().

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

Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ComputedExpression()

◆ ~ComputedExpression()

Member Function Documentation

◆ _checkExpression()

◆ _evaluate()

◆ _getExpressionForEvaluation()

◆ _getXPathAPI()

◆ clear()

◆ evaluate()

◆ getBool()

◆ getExpression()

◆ getString()

◆ getXPath()

◆ hasValue()

◆ isEmptyExpression()

◆ isSimpleExpression()

◆ setExpression()

Member Data Documentation

◆ mbIsEmpty

◆ mbIsSimple

◆ msExpression

◆ mxResult