#include <tinyxml2.h>

Public Member Functions
	XMLHandle (XMLNode *_node)
	Create a handle from any node (at any depth of the tree.) This can be a null pointer. More...

	XMLHandle (XMLNode &_node)
	Create a handle from a node. More...

	XMLHandle (const XMLHandle &ref)
	Copy constructor. More...

XMLHandle &	operator= (const XMLHandle &ref)
	Assignment. More...

XMLHandle	FirstChild ()
	Get the first child of this handle. More...

XMLHandle	FirstChildElement (const char *value=0)
	Get the first child element of this handle. More...

XMLHandle	LastChild ()
	Get the last child of this handle. More...

XMLHandle	LastChildElement (const char *_value=0)
	Get the last child element of this handle. More...

XMLHandle	PreviousSibling ()
	Get the previous sibling of this handle. More...

XMLHandle	PreviousSiblingElement (const char *_value=0)
	Get the previous sibling element of this handle. More...

XMLHandle	NextSibling ()
	Get the next sibling of this handle. More...

XMLHandle	NextSiblingElement (const char *_value=0)
	Get the next sibling element of this handle. More...

XMLNode *	ToNode ()
	Safe cast to XMLNode. This can return null. More...

XMLElement *	ToElement ()
	Safe cast to XMLElement. This can return null. More...

XMLText *	ToText ()
	Safe cast to XMLText. This can return null. More...

XMLUnknown *	ToUnknown ()
	Safe cast to XMLUnknown. This can return null. More...

XMLDeclaration *	ToDeclaration ()
	Safe cast to XMLDeclaration. This can return null. More...

Private Attributes
XMLNode *	node

Detailed Description

A XMLHandle is a class that wraps a node pointer with null checks; this is an incredibly useful thing. Note that XMLHandle is not part of the TinyXML DOM structure. It is a separate utility class.

Take an example:

<Document>
        <Element attributeA = "valueA">
                <Child attributeB = "value1" />
                <Child attributeB = "value2" />
        </Element>
</Document>

Assuming you want the value of "attributeB" in the 2nd "Child" element, it's very easy to write a lot of code that looks like:

XMLElement* root = document.FirstChildElement( "Document" );
if ( root )
{
        XMLElement* element = root->FirstChildElement( "Element" );
        if ( element )
        {
                XMLElement* child = element->FirstChildElement( "Child" );
                if ( child )
                {
                        XMLElement* child2 = child->NextSiblingElement( "Child" );
                        if ( child2 )
                        {
                                // Finally do something useful.

And that doesn't even cover "else" cases. XMLHandle addresses the verbosity of such code. A XMLHandle checks for null pointers so it is perfectly safe and correct to use:

XMLHandle docHandle( &document );
XMLElement* child2 = docHandle.FirstChild( "Document" ).FirstChild( "Element" ).FirstChild().NextSibling().ToElement();
if ( child2 )
{
        // do something useful

Which is MUCH more concise and useful.

It is also safe to copy handles - internally they are nothing more than node pointers.

XMLHandle handleCopy = handle;

See also XMLConstHandle, which is the same as XMLHandle, but operates on const objects.

Definition at line 1286 of file tinyxml2.h.

Constructor & Destructor Documentation

tinyxml2::XMLHandle::XMLHandle ( XMLNode * _node )

inline

Create a handle from any node (at any depth of the tree.) This can be a null pointer.

Definition at line 1290 of file tinyxml2.h.

References node.

Referenced by FirstChild(), FirstChildElement(), LastChild(), LastChildElement(), NextSibling(), NextSiblingElement(), PreviousSibling(), and PreviousSiblingElement().

1290 { node = _node; }

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation