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Objects implementing the NamedNodeMap interface are used to
represent collections of nodes that can be accessed by name. Note that
NamedNodeMap does not inherit from NodeList;
NamedNodeMaps are not maintained in any particular order.
Objects contained in an object implementing NamedNodeMap may
also be accessed by an ordinal index, but this is simply to allow
convenient enumeration of the contents of a NamedNodeMap, and
does not imply that the DOM specifies an order to these Nodes.
| Method Summary | |
int |
getLength()
The number of nodes in the map. |
Node |
getNamedItem(java.lang.String name)
Retrieves a node specified by name. |
Node |
item(int index)
Returns the indexth item in the map. |
Node |
removeNamedItem(java.lang.String name)
Removes a node specified by name. |
Node |
setNamedItem(Node arg)
Adds a node using its nodeName attribute. |
| Method Detail |
public Node getNamedItem(java.lang.String name)
name - Name of a node to retrieve.Node (of any type) with the specified name, or
null if the specified name did not identify any node in
the map.
public Node setNamedItem(Node arg)
throws DOMException
nodeName attribute.
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.arg - A node to store in a named node map. The node will later be
accessible using the value of the nodeName attribute of
the node. If a node with that name is already present in the map, it
is replaced by the new one.Node replaces an existing node with the
same name the previously existing Node is returned,
otherwise null is returned.arg was created from a
different document than the one that created the
NamedNodeMap.
NamedNodeMap is readonly.
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.
public Node removeNamedItem(java.lang.String name)
throws DOMException
Attr with a default value it is immediately replaced.name - The name of a node to remove.null if no node
with such a name exists.name in
the map.public Node item(int index)
indexth item in the map. If index
is greater than or equal to the number of nodes in the map, this returns
null.index - Index into the map.indexth position in the
NamedNodeMap, or null if that is not a valid
index.public int getLength()
length-1 inclusive.
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