tinyxml2::XMLElement Class Reference

#include "tinyxml2.h"

Inheritance diagram for tinyxml2::XMLElement:

Public Types
enum	{   OPEN,   CLOSED,   CLOSING }

Public Member Functions
virtual bool	Accept (XMLVisitor *visitor) const
const char *	Attribute (const char *name, const char *value=0) const
bool	BoolAttribute (const char *name) const
	See IntAttribute() More...
int	ClosingType () const
void	DeleteAttribute (const char *name)
double	DoubleAttribute (const char *name) const
	See IntAttribute() More...
const XMLAttribute *	FindAttribute (const char *name) const
	Query a specific attribute in the list. More...
const XMLAttribute *	FirstAttribute () const
	Return the first attribute in the list. More...
float	FloatAttribute (const char *name) const
	See IntAttribute() More...
const char *	GetText () const
int	IntAttribute (const char *name) const
const char *	Name () const
	Get the name of an element (which is the Value() of the node.) More...
char *	ParseDeep (char *p, StrPair *endTag)
int	QueryAttribute (const char *name, int *value) const
int	QueryAttribute (const char *name, unsigned int *value) const
int	QueryAttribute (const char *name, bool *value) const
int	QueryAttribute (const char *name, double *value) const
int	QueryAttribute (const char *name, float *value) const
XMLError	QueryBoolAttribute (const char *name, bool *value) const
	See QueryIntAttribute() More...
XMLError	QueryBoolText (bool *bval) const
	See QueryIntText() More...
XMLError	QueryDoubleAttribute (const char *name, double *value) const
	See QueryIntAttribute() More...
XMLError	QueryDoubleText (double *dval) const
	See QueryIntText() More...
XMLError	QueryFloatAttribute (const char *name, float *value) const
	See QueryIntAttribute() More...
XMLError	QueryFloatText (float *fval) const
	See QueryIntText() More...
XMLError	QueryIntAttribute (const char *name, int *value) const
XMLError	QueryIntText (int *ival) const
XMLError	QueryUnsignedAttribute (const char *name, unsigned int *value) const
	See QueryIntAttribute() More...
XMLError	QueryUnsignedText (unsigned *uval) const
	See QueryIntText() More...
void	SetAttribute (const char *name, const char *value)
	Sets the named attribute to value. More...
void	SetAttribute (const char *name, int value)
	Sets the named attribute to value. More...
void	SetAttribute (const char *name, unsigned value)
	Sets the named attribute to value. More...
void	SetAttribute (const char *name, bool value)
	Sets the named attribute to value. More...
void	SetAttribute (const char *name, double value)
	Sets the named attribute to value. More...
void	SetAttribute (const char *name, float value)
	Sets the named attribute to value. More...
void	SetName (const char *str, bool staticMem=false)
	Set the name of the element. More...
void	SetText (const char *inText)
void	SetText (int value)
	Convenience method for setting text inside and element. See SetText() for important limitations. More...
void	SetText (unsigned value)
	Convenience method for setting text inside and element. See SetText() for important limitations. More...
void	SetText (bool value)
	Convenience method for setting text inside and element. See SetText() for important limitations. More...
void	SetText (double value)
	Convenience method for setting text inside and element. See SetText() for important limitations. More...
void	SetText (float value)
	Convenience method for setting text inside and element. See SetText() for important limitations. More...
virtual XMLNode *	ShallowClone (XMLDocument *document) const
virtual bool	ShallowEqual (const XMLNode *compare) const
virtual XMLElement *	ToElement ()
	Safely cast to an Element, or null. More...
virtual const XMLElement *	ToElement () const
unsigned	UnsignedAttribute (const char *name) const
	See IntAttribute() More...
Public Member Functions inherited from tinyxml2::XMLNode
void	DeleteChild (XMLNode *node)
void	DeleteChildren ()
const XMLNode *	FirstChild () const
	Get the first child node, or null if none exists. More...
XMLNode *	FirstChild ()
const XMLElement *	FirstChildElement (const char *value=0) const
XMLElement *	FirstChildElement (const char *value=0)
const XMLDocument *	GetDocument () const
	Get the XMLDocument that owns this XMLNode. More...
XMLDocument *	GetDocument ()
	Get the XMLDocument that owns this XMLNode. More...
XMLNode *	InsertAfterChild (XMLNode *afterThis, XMLNode *addThis)
XMLNode *	InsertEndChild (XMLNode *addThis)
XMLNode *	InsertFirstChild (XMLNode *addThis)
const XMLNode *	LastChild () const
	Get the last child node, or null if none exists. More...
XMLNode *	LastChild ()
const XMLElement *	LastChildElement (const char *value=0) const
XMLElement *	LastChildElement (const char *value=0)
XMLNode *	LinkEndChild (XMLNode *addThis)
const XMLNode *	NextSibling () const
	Get the next (right) sibling node of this node. More...
XMLNode *	NextSibling ()
const XMLElement *	NextSiblingElement (const char *value=0) const
	Get the next (right) sibling element of this node, with an optionally supplied name. More...
XMLElement *	NextSiblingElement (const char *value=0)
bool	NoChildren () const
	Returns true if this node has no children. More...
const XMLNode *	Parent () const
	Get the parent of this node on the DOM. More...
XMLNode *	Parent ()
const XMLNode *	PreviousSibling () const
	Get the previous (left) sibling node of this node. More...
XMLNode *	PreviousSibling ()
const XMLElement *	PreviousSiblingElement (const char *value=0) const
	Get the previous (left) sibling element of this node, with an optionally supplied name. More...
XMLElement *	PreviousSiblingElement (const char *value=0)
void	SetValue (const char *val, bool staticMem=false)
virtual XMLComment *	ToComment ()
	Safely cast to a Comment, or null. More...
virtual const XMLComment *	ToComment () const
virtual XMLDeclaration *	ToDeclaration ()
	Safely cast to a Declaration, or null. More...
virtual const XMLDeclaration *	ToDeclaration () const
virtual XMLDocument *	ToDocument ()
	Safely cast to a Document, or null. More...
virtual const XMLDocument *	ToDocument () const
virtual XMLText *	ToText ()
	Safely cast to Text, or null. More...
virtual const XMLText *	ToText () const
virtual XMLUnknown *	ToUnknown ()
	Safely cast to an Unknown, or null. More...
virtual const XMLUnknown *	ToUnknown () const
const char *	Value () const

Friends
class	XMLBase
class	XMLDocument

Additional Inherited Members
Protected Member Functions inherited from tinyxml2::XMLNode
	XMLNode (XMLDocument *)
	XMLNode (const XMLNode &)
virtual	~XMLNode ()
XMLNode &	operator= (const XMLNode &)
Protected Attributes inherited from tinyxml2::XMLNode
XMLDocument *	_document
XMLNode *	_firstChild
XMLNode *	_lastChild
XMLNode *	_next
XMLNode *	_parent
XMLNode *	_prev
StrPair	_value

Detailed Description

The element is a container class. It has a value, the element name, and can contain other elements, text, comments, and unknowns. Elements also contain an arbitrary number of attributes.

Member Enumeration Documentation

anonymous enum

Enumerator
OPEN
CLOSED
CLOSING

Member Function Documentation

virtual bool tinyxml2::XMLElement::Accept ( XMLVisitor *  visitor ) const

virtual

Accept a hierarchical visit of the nodes in the TinyXML-2 DOM. Every node in the XML tree will be conditionally visited and the host will be called back via the XMLVisitor interface.

This is essentially a SAX interface for TinyXML-2. (Note however it doesn't re-parse the XML for the callbacks, so the performance of TinyXML-2 is unchanged by using this interface versus any other.)

The interface has been based on ideas from:

• http://www.saxproject.org/
• http://c2.com/cgi/wiki?HierarchicalVisitorPattern

Which are both good references for "visiting".

An example of using Accept():

XMLPrinter printer;
tinyxmlDoc.Accept( &printer );
const char* xmlcstr = printer.CStr();

Implements tinyxml2::XMLNode.

const char* tinyxml2::XMLElement::Attribute	(	const char *	name,
		const char *	value = 0
	)		const

Given an attribute name, Attribute() returns the value for the attribute of that name, or null if none exists. For example:

const char* value = ele->Attribute( "foo" );

The 'value' parameter is normally null. However, if specified, the attribute will only be returned if the 'name' and 'value' match. This allow you to write code:

if ( ele->Attribute( "foo", "bar" ) ) callFooIsBar();

rather than:

if ( ele->Attribute( "foo" ) ) {
    if ( strcmp( ele->Attribute( "foo" ), "bar" ) == 0 ) callFooIsBar();
}

bool tinyxml2::XMLElement::BoolAttribute ( const char *  name ) const

inline

See IntAttribute()

int tinyxml2::XMLElement::ClosingType ( ) const

inline

void tinyxml2::XMLElement::DeleteAttribute

(

const char *

name

)

Delete an attribute.

double tinyxml2::XMLElement::DoubleAttribute ( const char *  name ) const

inline

See IntAttribute()

const XMLAttribute* tinyxml2::XMLElement::FindAttribute

(

const char *

name

)

const

Query a specific attribute in the list.

const XMLAttribute* tinyxml2::XMLElement::FirstAttribute ( ) const

inline

Return the first attribute in the list.

float tinyxml2::XMLElement::FloatAttribute ( const char *  name ) const

inline

See IntAttribute()

const char* tinyxml2::XMLElement::GetText

(

)

const

Convenience function for easy access to the text inside an element. Although easy and concise, GetText() is limited compared to getting the XMLText child and accessing it directly.

If the first child of 'this' is a XMLText, the GetText() returns the character string of the Text node, else null is returned.

This is a convenient method for getting the text of simple contained text:

<foo>This is text</foo>
    const char* str = fooElement->GetText();

'str' will be a pointer to "This is text".

Note that this function can be misleading. If the element foo was created from this XML:

    <foo><b>This is text</b></foo>

then the value of str would be null. The first child node isn't a text node, it is another element. From this XML:

    <foo>This is <b>text</b></foo>

GetText() will return "This is ".

int tinyxml2::XMLElement::IntAttribute ( const char *  name ) const

inline

Given an attribute name, IntAttribute() returns the value of the attribute interpreted as an integer. 0 will be returned if there is an error. For a method with error checking, see QueryIntAttribute()

const char* tinyxml2::XMLElement::Name ( ) const

inline

Get the name of an element (which is the Value() of the node.)

char* tinyxml2::XMLElement::ParseDeep ( char *  p, StrPair *  endTag  )

virtual

Reimplemented from tinyxml2::XMLNode.

int tinyxml2::XMLElement::QueryAttribute ( const char *  name, int *  value  ) const

inline

Given an attribute name, QueryAttribute() returns XML_NO_ERROR, XML_WRONG_ATTRIBUTE_TYPE if the conversion can't be performed, or XML_NO_ATTRIBUTE if the attribute doesn't exist. It is overloaded for the primitive types, and is a generally more convenient replacement of QueryIntAttribute() and related functions.

If successful, the result of the conversion will be written to 'value'. If not successful, nothing will be written to 'value'. This allows you to provide default value:

int value = 10;
QueryAttribute( "foo", &value );        // if "foo" isn't found, value will still be 10

int tinyxml2::XMLElement::QueryAttribute ( const char *  name, unsigned int *  value  ) const

inline

int tinyxml2::XMLElement::QueryAttribute ( const char *  name, bool *  value  ) const

inline

int tinyxml2::XMLElement::QueryAttribute ( const char *  name, double *  value  ) const

inline

int tinyxml2::XMLElement::QueryAttribute ( const char *  name, float *  value  ) const

inline

XMLError tinyxml2::XMLElement::QueryBoolAttribute ( const char *  name, bool *  value  ) const

inline

See QueryIntAttribute()

XMLError tinyxml2::XMLElement::QueryBoolText

(

bool *

bval

)

const

See QueryIntText()

XMLError tinyxml2::XMLElement::QueryDoubleAttribute ( const char *  name, double *  value  ) const

inline

See QueryIntAttribute()

XMLError tinyxml2::XMLElement::QueryDoubleText

(

double *

dval

)

const

See QueryIntText()

XMLError tinyxml2::XMLElement::QueryFloatAttribute ( const char *  name, float *  value  ) const

inline

See QueryIntAttribute()

XMLError tinyxml2::XMLElement::QueryFloatText

(

float *

fval

)

const

See QueryIntText()

XMLError tinyxml2::XMLElement::QueryIntAttribute ( const char *  name, int *  value  ) const

inline

Given an attribute name, QueryIntAttribute() returns XML_NO_ERROR, XML_WRONG_ATTRIBUTE_TYPE if the conversion can't be performed, or XML_NO_ATTRIBUTE if the attribute doesn't exist. If successful, the result of the conversion will be written to 'value'. If not successful, nothing will be written to 'value'. This allows you to provide default value:

int value = 10;
QueryIntAttribute( "foo", &value );     // if "foo" isn't found, value will still be 10

XMLError tinyxml2::XMLElement::QueryIntText

(

int *

ival

)

const

Convenience method to query the value of a child text node. This is probably best shown by example. Given you have a document is this form:

    <point>
        <x>1</x>
        <y>1.4</y>
    </point>

The QueryIntText() and similar functions provide a safe and easier way to get to the "value" of x and y.

    int x = 0;
    float y = 0;    // types of x and y are contrived for example
    const XMLElement* xElement = pointElement->FirstChildElement( "x" );
    const XMLElement* yElement = pointElement->FirstChildElement( "y" );
    xElement->QueryIntText( &x );
    yElement->QueryFloatText( &y );

Returns

XML_SUCCESS (0) on success, XML_CAN_NOT_CONVERT_TEXT if the text cannot be converted to the requested type, and XML_NO_TEXT_NODE if there is no child text to query.

XMLError tinyxml2::XMLElement::QueryUnsignedAttribute ( const char *  name, unsigned int *  value  ) const

inline

See QueryIntAttribute()

XMLError tinyxml2::XMLElement::QueryUnsignedText

(

unsigned *

uval

)

const

See QueryIntText()

void tinyxml2::XMLElement::SetAttribute ( const char *  name, const char *  value  )

inline

Sets the named attribute to value.

void tinyxml2::XMLElement::SetAttribute ( const char *  name, int  value  )

inline

Sets the named attribute to value.

void tinyxml2::XMLElement::SetAttribute ( const char *  name, unsigned  value  )

inline

Sets the named attribute to value.

void tinyxml2::XMLElement::SetAttribute ( const char *  name, bool  value  )

inline

Sets the named attribute to value.

void tinyxml2::XMLElement::SetAttribute ( const char *  name, double  value  )

inline

Sets the named attribute to value.

void tinyxml2::XMLElement::SetAttribute ( const char *  name, float  value  )

inline

Sets the named attribute to value.

void tinyxml2::XMLElement::SetName ( const char *  str, bool  staticMem = false  )

inline

Set the name of the element.

void tinyxml2::XMLElement::SetText

(

const char *

inText

)

Convenience function for easy access to the text inside an element. Although easy and concise, SetText() is limited compared to creating an XMLText child and mutating it directly.

If the first child of 'this' is a XMLText, SetText() sets its value to the given string, otherwise it will create a first child that is an XMLText.

This is a convenient method for setting the text of simple contained text:

<foo>This is text</foo>
    fooElement->SetText( "Hullaballoo!" );
<foo>Hullaballoo!</foo>

Note that this function can be misleading. If the element foo was created from this XML:

    <foo><b>This is text</b></foo>

then it will not change "This is text", but rather prefix it with a text element:

    <foo>Hullaballoo!<b>This is text</b></foo>

For this XML:

    <foo />

SetText() will generate

    <foo>Hullaballoo!</foo>

void tinyxml2::XMLElement::SetText

(

int

value

)

Convenience method for setting text inside and element. See SetText() for important limitations.

void tinyxml2::XMLElement::SetText

(

unsigned

value

)

Convenience method for setting text inside and element. See SetText() for important limitations.

void tinyxml2::XMLElement::SetText

(

bool

value

)

Convenience method for setting text inside and element. See SetText() for important limitations.

void tinyxml2::XMLElement::SetText

(

double

value

)

Convenience method for setting text inside and element. See SetText() for important limitations.

void tinyxml2::XMLElement::SetText

(

float

value

)

Convenience method for setting text inside and element. See SetText() for important limitations.

virtual XMLNode* tinyxml2::XMLElement::ShallowClone ( XMLDocument *  document ) const

virtual

Make a copy of this node, but not its children. You may pass in a Document pointer that will be the owner of the new Node. If the 'document' is null, then the node returned will be allocated from the current Document. (this->GetDocument())

Note: if called on a XMLDocument, this will return null.

Implements tinyxml2::XMLNode.

virtual bool tinyxml2::XMLElement::ShallowEqual ( const XMLNode *  compare ) const

virtual

Test if 2 nodes are the same, but don't test children. The 2 nodes do not need to be in the same Document.

Note: if called on a XMLDocument, this will return false.

Implements tinyxml2::XMLNode.

virtual XMLElement* tinyxml2::XMLElement::ToElement ( )

inlinevirtual

Safely cast to an Element, or null.

Reimplemented from tinyxml2::XMLNode.

virtual const XMLElement* tinyxml2::XMLElement::ToElement ( ) const

inlinevirtual

Reimplemented from tinyxml2::XMLNode.

unsigned tinyxml2::XMLElement::UnsignedAttribute ( const char *  name ) const

inline

See IntAttribute()

Friends And Related Function Documentation

friend class XMLBase

friend

friend class XMLDocument

friend

---

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

• /build/master-contrib_docs-mac/opencv_contrib/modules/datasets/include/opencv2/datasets/tinyxml2/tinyxml2.h