Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) # NamedNodeMap ` public interface NamedNodeMap ` ` ` |---| | org.w3c.dom.NamedNodeMap |
*** ** * ** *** 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. `NamedNodeMap` objects in the DOM are live. See also the [Document Object Model (DOM) Level 3 Core Specification](http://www.w3.org/TR/2004/REC-DOM-Level-3-Core-20040407). ## Summary | ### Public methods || |---|---| | ` abstract int` | ` https://developer.android.com/reference/org/w3c/dom/NamedNodeMap#getLength()() ` The number of nodes in this map. | | ` abstract https://developer.android.com/reference/org/w3c/dom/Node` | ` https://developer.android.com/reference/org/w3c/dom/NamedNodeMap#getNamedItem(java.lang.String)(https://developer.android.com/reference/java/lang/String name) ` Retrieves a node specified by name. | | ` abstract https://developer.android.com/reference/org/w3c/dom/Node` | ` https://developer.android.com/reference/org/w3c/dom/NamedNodeMap#getNamedItemNS(java.lang.String,%20java.lang.String)(https://developer.android.com/reference/java/lang/String namespaceURI, https://developer.android.com/reference/java/lang/String localName) ` Retrieves a node specified by local name and namespace URI. | | ` abstract https://developer.android.com/reference/org/w3c/dom/Node` | ` https://developer.android.com/reference/org/w3c/dom/NamedNodeMap#item(int)(int index) ` Returns the `index`th item in the map. | | ` abstract https://developer.android.com/reference/org/w3c/dom/Node` | ` https://developer.android.com/reference/org/w3c/dom/NamedNodeMap#removeNamedItem(java.lang.String)(https://developer.android.com/reference/java/lang/String name) ` Removes a node specified by name. | | ` abstract https://developer.android.com/reference/org/w3c/dom/Node` | ` https://developer.android.com/reference/org/w3c/dom/NamedNodeMap#removeNamedItemNS(java.lang.String,%20java.lang.String)(https://developer.android.com/reference/java/lang/String namespaceURI, https://developer.android.com/reference/java/lang/String localName) ` Removes a node specified by local name and namespace URI. | | ` abstract https://developer.android.com/reference/org/w3c/dom/Node` | ` https://developer.android.com/reference/org/w3c/dom/NamedNodeMap#setNamedItem(org.w3c.dom.Node)(https://developer.android.com/reference/org/w3c/dom/Node arg) ` Adds a node using its `nodeName` attribute. | | ` abstract https://developer.android.com/reference/org/w3c/dom/Node` | ` https://developer.android.com/reference/org/w3c/dom/NamedNodeMap#setNamedItemNS(org.w3c.dom.Node)(https://developer.android.com/reference/org/w3c/dom/Node arg) ` Adds a node using its `namespaceURI` and `localName`. | ## Public methods ### getLength Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public abstract int getLength () ``` The number of nodes in this map. The range of valid child node indices is `0` to `length-1` inclusive.
| Returns || |---|---| | `int` |
| ### getNamedItem Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public abstract Node getNamedItem (String name) ``` Retrieves a node specified by name.
| Parameters || |---|---| | `name` | `String`: The `nodeName` of a node to retrieve.
| | Returns || |---|---| | `https://developer.android.com/reference/org/w3c/dom/Node` | A `Node` (of any type) with the specified `nodeName`, or `null` if it does not identify any node in this map.
| ### getNamedItemNS Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public abstract Node getNamedItemNS (String namespaceURI, String localName) ``` Retrieves a node specified by local name and namespace URI. Per \[[XML Namespaces](http://www.w3.org/TR/1999/REC-xml-names-19990114/)\] , applications must use the value null as the namespaceURI parameter for methods if they wish to have no namespace.
| Parameters || |---|---| | `namespaceURI` | `String`: The namespace URI of the node to retrieve.
| | `localName` | `String`: The local name of the node to retrieve.
| | Returns || |---|---| | `https://developer.android.com/reference/org/w3c/dom/Node` | 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.
| | Throws || |---|---| | `https://developer.android.com/reference/org/w3c/dom/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 \[[HTML 4.01](http://www.w3.org/TR/1999/REC-html401-19991224/)\]). | ### item Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public abstract Node item (int index) ``` Returns the `index`th item in the map. If `index` is greater than or equal to the number of nodes in this map, this returns `null`.
| Parameters || |---|---| | `index` | `int`: Index into this map.
| | Returns || |---|---| | `https://developer.android.com/reference/org/w3c/dom/Node` | The node at the `index`th position in the map, or `null` if that is not a valid index.
| ### removeNamedItem Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public abstract Node removeNamedItem (String 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.
| Parameters || |---|---| | `name` | `String`: The `nodeName` of the node to remove.
| | Returns || |---|---| | `https://developer.android.com/reference/org/w3c/dom/Node` | The node removed from this map if a node with such a name exists.
| | Throws || |---|---| | `https://developer.android.com/reference/org/w3c/dom/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. | ### removeNamedItemNS Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public abstract Node removeNamedItemNS (String namespaceURI, String localName) ``` 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 \[[XML Namespaces](http://www.w3.org/TR/1999/REC-xml-names-19990114/)\] , applications must use the value null as the namespaceURI parameter for methods if they wish to have no namespace.
| Parameters || |---|---| | `namespaceURI` | `String`: The namespace URI of the node to remove.
| | `localName` | `String`: The local name of the node to remove.
| | Returns || |---|---| | `https://developer.android.com/reference/org/w3c/dom/Node` | The node removed from this map if a node with such a local name and namespace URI exists.
| | Throws || |---|---| | `https://developer.android.com/reference/org/w3c/dom/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 \[[HTML 4.01](http://www.w3.org/TR/1999/REC-html401-19991224/)\]). | ### setNamedItem Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public abstract Node setNamedItem (Node arg) ``` 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.
| Parameters || |---|---| | `arg` | `Node`: A node to store in this map. The node will later be accessible using the value of its `nodeName` attribute.
| | Returns || |---|---| | `https://developer.android.com/reference/org/w3c/dom/Node` | If the new `Node` replaces an existing node the replaced `Node` is returned, otherwise `null` is returned.
| | Throws || |---|---| | `https://developer.android.com/reference/org/w3c/dom/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. | ### setNamedItemNS Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public abstract Node setNamedItemNS (Node arg) ``` 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 \[[XML Namespaces](http://www.w3.org/TR/1999/REC-xml-names-19990114/)\] , applications must use the value null as the namespaceURI parameter for methods if they wish to have no namespace.
| Parameters || |---|---| | `arg` | `Node`: A node to store in this map. The node will later be accessible using the value of its `namespaceURI` and `localName` attributes.
| | Returns || |---|---| | `https://developer.android.com/reference/org/w3c/dom/Node` | If the new `Node` replaces an existing node the replaced `Node` is returned, otherwise `null` is returned.
| | Throws || |---|---| | `https://developer.android.com/reference/org/w3c/dom/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 \[[HTML 4.01](http://www.w3.org/TR/1999/REC-html401-19991224/)\]). |