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DOM_Node Class Reference

Inheritance diagram for DOM_Node:

List of all members.

Equality and Inequality operators.
enum	NodeType {   ELEMENT_NODE = 1, ATTRIBUTE_NODE = 2, TEXT_NODE = 3, CDATA_SECTION_NODE = 4,   ENTITY_REFERENCE_NODE = 5, ENTITY_NODE = 6, PROCESSING_INSTRUCTION_NODE = 7, COMMENT_NODE = 8,   DOCUMENT_NODE = 9, DOCUMENT_TYPE_NODE = 10, DOCUMENT_FRAGMENT_NODE = 11, NOTATION_NODE = 12,   XML_DECL_NODE = 13 }
bool	operator== (const DOM_Node &other) const
bool	operator== (const DOM_NullPtr *other) const
bool	operator!= (const DOM_Node &other) const
bool	operator!= (const DOM_NullPtr *other) const
Public Types
Public Methods
Constructors and assignment operators
	DOM_Node ()
	DOM_Node (const DOM_Node &other)
DOM_Node &	operator= (const DOM_Node &other)
DOM_Node &	operator= (const DOM_NullPtr *val)
Destructor.
	~DOM_Node ()
Get functions.
DOMString	getNodeName () const
DOMString	getNodeValue () const
short	getNodeType () const
DOM_Node	getParentNode () const
DOM_NodeList	getChildNodes () const
DOM_Node	getFirstChild () const
DOM_Node	getLastChild () const
DOM_Node	getPreviousSibling () const
DOM_Node	getNextSibling () const
DOM_NamedNodeMap	getAttributes () const
DOM_Document	getOwnerDocument () const
void *	getUserData () const
Cloning function.
DOM_Node	cloneNode (bool deep) const
Functions to modify the DOM Node.
DOM_Node	insertBefore (const DOM_Node &newChild, const DOM_Node &refChild)
DOM_Node	replaceChild (const DOM_Node &newChild, const DOM_Node &oldChild)
DOM_Node	removeChild (const DOM_Node &oldChild)
DOM_Node	appendChild (const DOM_Node &newChild)
Query functions.
bool	hasChildNodes () const
bool	isNull () const
Set functions.
void	setNodeValue (const DOMString &nodeValue)
void	setUserData (void *p)
Functions introduced in DOM Level 2.
void	normalize ()
bool	isSupported (const DOMString &feature, const DOMString &version) const
DOMString	getNamespaceURI () const
DOMString	getPrefix () const
DOMString	getLocalName () const
void	setPrefix (const DOMString &prefix)
bool	hasAttributes () const
Protected Methods
	DOM_Node (NodeImpl *)
Protected Attributes
NodeImpl *	fImpl
Friends
class	DOM_Document
class	DocumentImpl
class	TreeWalkerImpl
class	NodeIteratorImpl
class	DOM_NamedNodeMap
class	DOM_NodeList
class	DOMParser
class	DOM_Entity
class	RangeImpl
class	CharacterDataImpl
class	XUtil

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Detailed Description

The Node interface is the primary datatype for the entire Document Object Model.

It represents a single node in the document tree. While all objects implementing the Node interface expose methods for dealing with children, not all objects implementing the Node interface may have children. For example, Text nodes may not have children, and adding children to such nodes results in a DOMException being raised.

The attributes nodeName, nodeValue and attributes are included as a mechanism to get at node information without casting down to the specific derived interface. In cases where there is no obvious mapping of these attributes for a specific nodeType (e.g., nodeValue for an Element or attributes for a Comment), this returns null. Note that the specialized interfaces may contain additional and more convenient mechanisms to get and set the relevant information.

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Constructor & Destructor Documentation

DOM_Node::DOM_Node (    )

Default constructor for DOM_Node. The resulting object does not refer to an actual node; it will compare == to 0, and is similar to a null object reference variable in Java. It may subsequently be assigned to refer to an actual node. "Acutal Nodes" will always be of some derived type, such as Element or Attr.

DOM_Node::DOM_Node (  const DOM_Node &    other )

Copy constructor. Parameters: other  The object to be copied.

DOM_Node::~DOM_Node (    )

Destructor for DOM_Node. The object being destroyed is the reference object, not the underlying node itself.

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Member Function Documentation

DOM_Node DOM_Node::appendChild (  const DOM_Node &    newChild )

Adds the node newChild to the end of the list of children of this node. If the newChild is already in the tree, it is first removed. Parameters: newChild  The node to add.If it is a DocumentFragment object, the entire contents of the document fragment are moved into the child list of this node Returns: The node added. Exceptions: DOMException  HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the newChild node, or if the node to append is one of this node's ancestors. WRONG_DOCUMENT_ERR: Raised if newChild was created from a different document than the one that created this node. NO_MODIFICATION_ALLOWED_ERR: Raised if this node or the node being appended is readonly.

DOM_Node DOM_Node::cloneNode (  bool    deep )  const

Returns a duplicate of this node. This function serves as a generic copy constructor for nodes. The duplicate node has no parent ( parentNode returns null.). Cloning an Element copies all attributes and their values, including those generated by the XML processor to represent defaulted attributes, but this method does not copy any text it contains unless it is a deep clone, since the text is contained in a child Text node. Cloning any other type of node simply returns a copy of this node. Parameters: deep  If true, recursively clone the subtree under the specified node; if false, clone only the node itself (and its attributes, if it is an Element). Returns: The duplicate node.

DOM_NamedNodeMap DOM_Node::getAttributes (    )  const

Gets a NamedNodeMap containing the attributes of this node (if it is an Element) or null otherwise.

DOM_NodeList DOM_Node::getChildNodes (    )  const

Gets a NodeList that contains all children of this node. If there are no children, this is a NodeList containing no nodes. The content of the returned NodeList is "live" in the sense that, for instance, changes to the children of the node object that it was created from are immediately reflected in the nodes returned by the NodeList accessors; it is not a static snapshot of the content of the node. This is true for every NodeList, including the ones returned by the getElementsByTagName method. Reimplemented in DOM_Entity.

DOM_Node DOM_Node::getFirstChild (    )  const

Gets the first child of this node. If there is no such node, this returns null. Reimplemented in DOM_Entity.

DOM_Node DOM_Node::getLastChild (    )  const

Gets the last child of this node. If there is no such node, this returns null. Reimplemented in DOM_Entity.

DOMString DOM_Node::getLocalName (    )  const

Returns the local part of the qualified name of this node. For nodes created with a DOM Level 1 method, such as createElement from the DOM_Document interface, it is null.

DOMString DOM_Node::getNamespaceURI (    )  const

Get the namespace URI of this node, or null if it is unspecified. This is not a computed value that is the result of a namespace lookup based on an examination of the namespace declarations in scope. It is merely the namespace URI given at creation time. For nodes of any type other than ELEMENT_NODE and ATTRIBUTE_NODE and nodes created with a DOM Level 1 method, such as createElement from the DOM_Document interface, this is always null.

DOM_Node DOM_Node::getNextSibling (    )  const

Gets the node immediately following this node. If there is no such node, this returns null. Reimplemented in DOM_Entity.

DOMString DOM_Node::getNodeName (    )  const

The name of this node, depending on its type; see the table above.

short DOM_Node::getNodeType (    )  const

An enum value representing the type of the underlying object.

DOMString DOM_Node::getNodeValue (    )  const

Gets the value of this node, depending on its type. Exceptions: DOMException  NO_MODIFICATION_ALLOWED_ERR: Raised when the node is readonly. DOMException  DOMSTRING_SIZE_ERR: Raised when it would return more characters than fit in a DOMString variable on the implementation platform.

DOM_Document DOM_Node::getOwnerDocument (    )  const

Gets the DOM_Document object associated with this node. This is also the DOM_Document object used to create new nodes. When this node is a DOM_Document or a DOM_DocumentType which is not used with any DOM_Document yet, this is null.

DOM_Node DOM_Node::getParentNode (    )  const

Gets the parent of this node. All nodes, except Document, DocumentFragment, and Attr may have a parent. However, if a node has just been created and not yet added to the tree, or if it has been removed from the tree, a null DOM_Node is returned.

DOMString DOM_Node::getPrefix (    )  const

Get the namespace prefix of this node, or null if it is unspecified.

DOM_Node DOM_Node::getPreviousSibling (    )  const

Gets the node immediately preceding this node. If there is no such node, this returns null. Reimplemented in DOM_Entity.

void * DOM_Node::getUserData (    )  const

Return the user data pointer. User data allows application programs to attach extra data to DOM nodes, and can be set using the function DOM_Node::setUserData(p). Returns: The user data pointer.

bool DOM_Node::hasAttributes (    )  const

Returns whether this node (if it is an element) has any attributes. Returns: true if this node has any attributes, false otherwise. Reimplemented in DOM_Element.

bool DOM_Node::hasChildNodes (    )  const

This is a convenience method to allow easy determination of whether a node has any children. Returns: true if the node has any children, false if the node has no children. Reimplemented in DOM_Entity.

DOM_Node DOM_Node::insertBefore (  const DOM_Node &    newChild, const DOM_Node &    refChild )

Inserts the node newChild before the existing child node refChild. If refChild is null, insert newChild at the end of the list of children. If newChild is a DocumentFragment object, all of its children are inserted, in the same order, before refChild. If the newChild is already in the tree, it is first removed. Note that a DOM_Node that has never been assigned to refer to an actual node is == null. Parameters: newChild  The node to insert. refChild  The reference node, i.e., the node before which the new node must be inserted. Returns: The node being inserted. Exceptions: DOMException  HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the newChild node, or if the node to insert is one of this node's ancestors. WRONG_DOCUMENT_ERR: Raised if newChild was created from a different document than the one that created this node. NO_MODIFICATION_ALLOWED_ERR: Raised if this node or the node being inserted is readonly. NOT_FOUND_ERR: Raised if refChild is not a child of this node.

bool DOM_Node::isNull (    )  const

Test whether this node is null. This C++ class, DOM_Node functions much like an object reference to an underlying Node, and this function tests for that reference being null. Several DOM APIs, Node.getNextSibling() for example, can return null, and this function is used to test for that condition. Operator == provides another way to perform this null test on a DOM_Node.

bool DOM_Node::isSupported (  const DOMString &    feature, const DOMString &    version )  const

Tests whether the DOM implementation implements a specific feature and that feature is supported by this node. Parameters: feature  The string of the feature to test. This is the same name as what can be passed to the method hasFeature on DOM_DOMImplementation. version  This is the version number of the feature to test. In Level 2, version 1, this is the string "2.0". If the version is not specified, supporting any version of the feature will cause the method to return true. Returns: Returns true if the specified feature is supported on this node, false otherwise.

void DOM_Node::normalize (    )

Puts all DOM_Text nodes in the full depth of the sub-tree underneath this DOM_Node, including attribute nodes, into a "normal" form where only markup (e.g., tags, comments, processing instructions, CDATA sections, and entity references) separates DOM_Text nodes, i.e., there are neither adjacent DOM_Text nodes nor empty DOM_Text nodes. This can be used to ensure that the DOM view of a document is the same as if it were saved and re-loaded, and is useful when operations (such as XPointer lookups) that depend on a particular document tree structure are to be used. Note: In cases where the document contains DOM_CDATASections, the normalize operation alone may not be sufficient, since XPointers do not differentiate between DOM_Text nodes and DOM_CDATASection nodes.

bool DOM_Node::operator!= (  const DOM_NullPtr *    other )  const

Compare with a pointer. Intended only to allow a convenient comparison with null.

bool DOM_Node::operator!= (  const DOM_Node &    other )  const

The inequality operator. See operator ==.

DOM_Node & DOM_Node::operator= (  const DOM_NullPtr *    val )

Assignment operator. This overloaded variant is provided for the sole purpose of setting a DOM_Node reference variable to zero. Nulling out a reference variable in this way will decrement the reference count on the underlying Node object that the variable formerly referenced. This effect is normally obtained when reference variable goes out of scope, but zeroing them can be useful for global instances, or for local instances that will remain in scope for an extended time, when the storage belonging to the underlying node needs to be reclaimed. Parameters: val  Only a value of 0, or null, is allowed. Reimplemented in DOM_Attr, DOM_CDATASection, DOM_CharacterData, DOM_Comment, DOM_Document, DOM_DocumentFragment, DOM_DocumentType, DOM_Element, DOM_Entity, DOM_EntityReference, DOM_Notation, DOM_ProcessingInstruction, DOM_Text, and DOM_XMLDecl.

DOM_Node & DOM_Node::operator= (  const DOM_Node &    other )

Assignment operator. Parameters: other  The source to be assigned.

bool DOM_Node::operator== (  const DOM_NullPtr *    other )  const

Compare with a pointer. Intended only to allow a convenient comparison with null.

bool DOM_Node::operator== (  const DOM_Node &    other )  const

The equality operator. This compares to references to nodes, and returns true if they both refer to the same underlying node. It is exactly analogous to Java's operator == on object reference variables. This operator can not be used to compare the values of two different nodes in the document tree. Parameters: other  The object reference with which this object is compared Returns: True if both DOM_Nodes refer to the same actual node, or are both null; return false otherwise.

DOM_Node DOM_Node::removeChild (  const DOM_Node &    oldChild )

Removes the child node indicated by oldChild from the list of children, and returns it. Parameters: oldChild  The node being removed. Returns: The node removed. Exceptions: DOMException  NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. NOT_FOUND_ERR: Raised if oldChild is not a child of this node.

DOM_Node DOM_Node::replaceChild (  const DOM_Node &    newChild, const DOM_Node &    oldChild )

Replaces the child node oldChild with newChild in the list of children, and returns the oldChild node. If newChild is a DOM_DocumentFragment object, oldChild is replaced by all of the DOM_DocumentFragment children, which are inserted in the same order. If the newChild is already in the tree, it is first removed. Parameters: newChild  The new node to put in the child list. oldChild  The node being replaced in the list. Returns: The node replaced. Exceptions: DOMException  HIERARCHY_REQUEST_ERR: Raised if this node is of a type that does not allow children of the type of the newChild node, or it the node to put in is one of this node's ancestors. WRONG_DOCUMENT_ERR: Raised if newChild was created from a different document than the one that created this node. NO_MODIFICATION_ALLOWED_ERR: Raised if this node or the new node is readonly. NOT_FOUND_ERR: Raised if oldChild is not a child of this node.

void DOM_Node::setNodeValue (  const DOMString &    nodeValue )

Sets the value of the node. Any node which can have a nodeValue ( See also: getNodeValue) will also accept requests to set it to a string. The exact response to this varies from node to node -- Attribute, for example, stores its values in its children and has to replace them with a new Text holding the replacement value. For most types of Node, value is null and attempting to set it will throw DOMException(NO_MODIFICATION_ALLOWED_ERR). This will also be thrown if the node is read-only.

void DOM_Node::setPrefix (  const DOMString &    prefix )

Set the namespace prefix of this node. Note that setting this attribute, when permitted, changes the nodeName attribute, which holds the qualified name, as well as the tagName and name attributes of the DOM_Element and DOM_Attr interfaces, when applicable. Note also that changing the prefix of an attribute, that is known to have a default value, does not make a new attribute with the default value and the original prefix appear, since the namespaceURI and localName do not change. Parameters: prefix  The prefix of this node. Exceptions: DOMException  INVALID_CHARACTER_ERR: Raised if the specified prefix contains an illegal character. NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly. NAMESPACE_ERR: Raised if the specified prefix is malformed, if the namespaceURI of this node is null, if the specified prefix is "xml" and the namespaceURI of this node is different from "http://www.w3.org/XML/1998/namespace", if this node is an attribute and the specified prefix is "xmlns" and the namespaceURI of this node is different from "http://www.w3.org/2000/xmlns/", or if this node is an attribute and the qualifiedName of this node is "xmlns".

void DOM_Node::setUserData (  void *    p )

Set the user data for a node. User data allows application programs to attach extra data to DOM nodes, and can be retrieved using the function DOM_Node::getUserData(p). Deletion of the user data remains the responsibility of the application program; it will not be automatically deleted when the nodes themselves are reclaimed. Because DOM_Node is not designed to be subclassed, userdata provides an alternative means for extending the the information kept with nodes by an application program. Parameters: p  The pointer to be kept with the node.

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

• DOM_Node.hpp
• DOM_Node.cpp

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