OpenCV  3.1.0
Open Source Computer Vision
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tinyxml2::XMLElement Class Reference

#include "tinyxml2.h"

Inheritance diagram for tinyxml2::XMLElement:
tinyxml2::XMLNode

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 XMLAttributeFindAttribute (const char *name) const
 Query a specific attribute in the list. More...
 
const XMLAttributeFirstAttribute () 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 XMLNodeShallowClone (XMLDocument *document) const
 
virtual bool ShallowEqual (const XMLNode *compare) const
 
virtual XMLElementToElement ()
 Safely cast to an Element, or null. More...
 
virtual const XMLElementToElement () const
 
unsigned UnsignedAttribute (const char *name) const
 See IntAttribute() More...
 
- Public Member Functions inherited from tinyxml2::XMLNode
void DeleteChild (XMLNode *node)
 
void DeleteChildren ()
 
const XMLNodeFirstChild () const
 Get the first child node, or null if none exists. More...
 
XMLNodeFirstChild ()
 
const XMLElementFirstChildElement (const char *value=0) const
 
XMLElementFirstChildElement (const char *value=0)
 
const XMLDocumentGetDocument () const
 Get the XMLDocument that owns this XMLNode. More...
 
XMLDocumentGetDocument ()
 Get the XMLDocument that owns this XMLNode. More...
 
XMLNodeInsertAfterChild (XMLNode *afterThis, XMLNode *addThis)
 
XMLNodeInsertEndChild (XMLNode *addThis)
 
XMLNodeInsertFirstChild (XMLNode *addThis)
 
const XMLNodeLastChild () const
 Get the last child node, or null if none exists. More...
 
XMLNodeLastChild ()
 
const XMLElementLastChildElement (const char *value=0) const
 
XMLElementLastChildElement (const char *value=0)
 
XMLNodeLinkEndChild (XMLNode *addThis)
 
const XMLNodeNextSibling () const
 Get the next (right) sibling node of this node. More...
 
XMLNodeNextSibling ()
 
const XMLElementNextSiblingElement (const char *value=0) const
 Get the next (right) sibling element of this node, with an optionally supplied name. More...
 
XMLElementNextSiblingElement (const char *value=0)
 
bool NoChildren () const
 Returns true if this node has no children. More...
 
const XMLNodeParent () const
 Get the parent of this node on the DOM. More...
 
XMLNodeParent ()
 
const XMLNodePreviousSibling () const
 Get the previous (left) sibling node of this node. More...
 
XMLNodePreviousSibling ()
 
const XMLElementPreviousSiblingElement (const char *value=0) const
 Get the previous (left) sibling element of this node, with an optionally supplied name. More...
 
XMLElementPreviousSiblingElement (const char *value=0)
 
void SetValue (const char *val, bool staticMem=false)
 
virtual XMLCommentToComment ()
 Safely cast to a Comment, or null. More...
 
virtual const XMLCommentToComment () const
 
virtual XMLDeclarationToDeclaration ()
 Safely cast to a Declaration, or null. More...
 
virtual const XMLDeclarationToDeclaration () const
 
virtual XMLDocumentToDocument ()
 Safely cast to a Document, or null. More...
 
virtual const XMLDocumentToDocument () const
 
virtual XMLTextToText ()
 Safely cast to Text, or null. More...
 
virtual const XMLTextToText () const
 
virtual XMLUnknownToUnknown ()
 Safely cast to an Unknown, or null. More...
 
virtual const XMLUnknownToUnknown () 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 ()
 
XMLNodeoperator= (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:

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
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
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
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
XMLError tinyxml2::XMLElement::QueryBoolText ( bool *  bval) const
XMLError tinyxml2::XMLElement::QueryDoubleAttribute ( const char *  name,
double *  value 
) const
inline
XMLError tinyxml2::XMLElement::QueryDoubleText ( double *  dval) const
XMLError tinyxml2::XMLElement::QueryFloatAttribute ( const char *  name,
float *  value 
) const
inline
XMLError tinyxml2::XMLElement::QueryFloatText ( float *  fval) const
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
XMLError tinyxml2::XMLElement::QueryUnsignedText ( unsigned *  uval) const
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

Friends And Related Function Documentation

friend class XMLBase
friend
friend class XMLDocument
friend

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