NamedNodeMap JDK 1.6)

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public int getLength ()

The number of nodes in this map.

The number of nodes in this map. The range of valid child node indices
is 0 to length-1 inclusive.

public Node getNamedItem (String name)

Retrieves a node specified by name.

Retrieves a node specified by name.
Returns: A Node (of any type) with the specified nodeName, or null if it does not identify any node in this map.
Parameters:
- name - The nodeName of a node to retrieve.

public Node getNamedItemNS (String namespaceURI, String localName) throws DOMException

Retrieves a node specified by local name and namespace URI.

Retrieves a node specified by local name and namespace URI.

Per [XML Namespaces]
, applications must use the value null as the namespaceURI parameter
for methods if they wish to have no namespace.
Returns: A Node (of any type) with the specified local name and namespace URI, or null if they do not identify any node in this map.
Parameters:
- namespaceURI - The namespace URI of the node to retrieve.
- localName - The local name of the node to retrieve.
Throws:
- DOMException - NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]).
Since: DOM Level 2

public Node item (int index)

Returns the indexth item in the map.

Returns the indexth item in the map. If index
is greater than or equal to the number of nodes in this map, this
returns null.
Returns: The node at the indexth position in the map, or null if that is not a valid index.
Parameters:
- index - Index into this map.

public Node removeNamedItem (String name) throws DOMException

Removes a node specified by name.

Removes a node specified by name. When this map contains the attributes
attached to an element, if the removed attribute is known to have a
default value, an attribute immediately appears containing the
default value as well as the corresponding namespace URI, local name,
and prefix when applicable.
Returns: The node removed from this map if a node with such a name exists.
Parameters:
- name - The nodeName of the node to remove.
Throws:
- DOMException - NOT_FOUND_ERR: Raised if there is no node named name in this map.
NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.

public Node removeNamedItemNS (String namespaceURI, String localName) throws DOMException

Removes a node specified by local name and namespace URI.

Removes a node specified by local name and namespace URI. A removed
attribute may be known to have a default value when this map contains
the attributes attached to an element, as returned by the attributes
attribute of the Node interface. If so, an attribute
immediately appears containing the default value as well as the
corresponding namespace URI, local name, and prefix when applicable.

Per [XML Namespaces]
, applications must use the value null as the namespaceURI parameter
for methods if they wish to have no namespace.
Returns: The node removed from this map if a node with such a local name and namespace URI exists.
Parameters:
- namespaceURI - The namespace URI of the node to remove.
- localName - The local name of the node to remove.
Throws:
- DOMException - NOT_FOUND_ERR: Raised if there is no node with the specified namespaceURI and localName in this map.
NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]).
Since: DOM Level 2

public Node setNamedItem (Node arg) throws DOMException

Adds a node using its nodeName attribute.

Adds a node using its nodeName attribute. If a node with
that name is already present in this map, it is replaced by the new
one. Replacing a node by itself has no effect.

As the nodeName attribute is used to derive the name
which the node must be stored under, multiple nodes of certain types
(those that have a "special" string value) cannot be stored as the
names would clash. This is seen as preferable to allowing nodes to be
aliased.
Returns: If the new Node replaces an existing node the replaced Node is returned, otherwise null is returned.
Parameters:
- arg - A node to store in this map. The node will later be accessible using the value of its nodeName attribute.
Throws:
- DOMException - WRONG_DOCUMENT_ERR: Raised if arg was created from a different document than the one that created this map.
NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
INUSE_ATTRIBUTE_ERR: Raised if arg is an Attr that is already an attribute of another Element object. The DOM user must explicitly clone Attr nodes to re-use them in other elements.
HIERARCHY_REQUEST_ERR: Raised if an attempt is made to add a node doesn't belong in this NamedNodeMap. Examples would include trying to insert something other than an Attr node into an Element's map of attributes, or a non-Entity node into the DocumentType's map of Entities.

public Node setNamedItemNS (Node arg) throws DOMException

Adds a node using its namespaceURI and localName.

Adds a node using its namespaceURI and
localName. If a node with that namespace URI and that
local name is already present in this map, it is replaced by the new
one. Replacing a node by itself has no effect.

Per [XML Namespaces]
, applications must use the value null as the namespaceURI parameter
for methods if they wish to have no namespace.
Returns: If the new Node replaces an existing node the replaced Node is returned, otherwise null is returned.
Parameters:
- arg - A node to store in this map. The node will later be accessible using the value of its namespaceURI and localName attributes.
Throws:
- DOMException - WRONG_DOCUMENT_ERR: Raised if arg was created from a different document than the one that created this map.
NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
INUSE_ATTRIBUTE_ERR: Raised if arg is an Attr that is already an attribute of another Element object. The DOM user must explicitly clone Attr nodes to re-use them in other elements.
HIERARCHY_REQUEST_ERR: Raised if an attempt is made to add a node doesn't belong in this NamedNodeMap. Examples would include trying to insert something other than an Attr node into an Element's map of attributes, or a non-Entity node into the DocumentType's map of Entities.
NOT_SUPPORTED_ERR: May be raised if the implementation does not support the feature "XML" and the language exposed through the Document does not support XML Namespaces (such as [HTML 4.01]).
Since: DOM Level 2