OpenLayers. Format.XML

Read and write XML. For cross-browser XML generation, use methods on an instance of the XML format class instead of on <code>document<end>. The DOM creation and traversing methods exposed here all mimic the W3C XML DOM methods. Create a new parser with the OpenLayers.Format.XML constructor.

Inherits from

OpenLayers.Format

Summary

OpenLayers. Format.XML	Read and write XML.
Constructor
OpenLayers. Format.XML	Construct an XML parser.
Functions
destroy	Clean up.
write	Serialize a DOM node into a XML string.
createElementNS	Create a new element with namespace.
createDocumentFragment	Create a document fragment node that can be appended to another node created by createElementNS.
createTextNode	Create a text node.
getElementsByTagNameNS	Get a list of elements on a node given the namespace URI and local name.
getAttributeNodeNS	Get an attribute node given the namespace URI and local name.
getAttributeNS	Get an attribute value given the namespace URI and local name.
getChildValue	Get the textual value of the node if it exists, or return an optional default string.
isSimpleContent	Test if the given node has only simple content (i.e.
contentType	Determine the content type for a given node.
hasAttributeNS	Determine whether a node has a particular attribute matching the given name and namespace.
setAttributeNS	Adds a new attribute or changes the value of an attribute with the given namespace and name.
getChildEl	Get the first child element.
getNextEl	Get the next sibling element.
lookupNamespaceURI	Takes a prefix and returns the namespace URI associated with it on the given node if found (and null if not).
OpenLayers. Format. XML. lookupNamespaceURI	Takes a prefix and returns the namespace URI associated with it on the given node if found (and null if not).

Constructor

OpenLayers. Format.XML

Construct an XML parser. The parser is used to read and write XML. Reading XML from a string returns a DOM element. Writing XML from a DOM element returns a string.

Parameters

options

{Object} Optional object whose properties will be set on the object.

Functions

destroy

destroy: function()

Clean up.

write

write: function( node )

Serialize a DOM node into a XML string.

Parameters

node	{DOMElement} A DOM node.

Returns

{String} The XML string representation of the input node.

createElementNS

createElementNS: function( uri,

name )

Create a new element with namespace. This node can be appended to another node with the standard node.appendChild method. For cross-browser support, this method must be used instead of document.createElementNS.

Parameters

uri	{String} Namespace URI for the element.
name	{String} The qualified name of the element (prefix:localname).

Returns

{Element} A DOM element with namespace.

createDocumentFragment

createDocumentFragment: function()

Create a document fragment node that can be appended to another node created by createElementNS. This will call document.createDocumentFragment outside of IE. In IE, the ActiveX object’s createDocumentFragment method is used.

Returns

{Element} A document fragment.

createTextNode

createTextNode: function( text )

Create a text node. This node can be appended to another node with the standard node.appendChild method. For cross-browser support, this method must be used instead of document.createTextNode.

Parameters

text	{String} The text of the node.

Returns

{DOMElement} A DOM text node.

getElementsByTagNameNS

getElementsByTagNameNS: function( node,

uri,

name )

Get a list of elements on a node given the namespace URI and local name. To return all nodes in a given namespace, use ‘*’ for the name argument. To return all nodes of a given (local) name, regardless of namespace, use ‘*’ for the uri argument.

Parameters

node	{Element} Node on which to search for other nodes.
uri	{String} Namespace URI.
name	{String} Local name of the tag (without the prefix).

Returns

{NodeList} A node list or array of elements.

getAttributeNodeNS

getAttributeNodeNS: function( node,

uri,

name )

Get an attribute node given the namespace URI and local name.

Parameters

node	{Element} Node on which to search for attribute nodes.
uri	{String} Namespace URI.
name	{String} Local name of the attribute (without the prefix).

Returns

{DOMElement} An attribute node or null if none found.

getAttributeNS

getAttributeNS: function( node,

uri,

name )

Get an attribute value given the namespace URI and local name.

Parameters

node	{Element} Node on which to search for an attribute.
uri	{String} Namespace URI.
name	{String} Local name of the attribute (without the prefix).

Returns

{String} An attribute value or and empty string if none found.

getChildValue

getChildValue: function( node,

def )

Get the textual value of the node if it exists, or return an optional default string. Returns an empty string if no first child exists and no default value is supplied.

Parameters

node	{DOMElement} The element used to look for a first child value.
def	{String} Optional string to return in the event that no first child value exists.

Returns

{String} The value of the first child of the given node.

isSimpleContent

isSimpleContent: function( node )

Test if the given node has only simple content (i.e. no child element nodes).

Parameters

node	{DOMElement} An element node.

Returns

{Boolean} The node has no child element nodes (nodes of type 1).

contentType

contentType: function( node )

Determine the content type for a given node.

Parameters

node	{DOMElement}

Returns

{Integer} One of OpenLayers.Format.XML.CONTENT_TYPE.{EMPTY,SIMPLE,COMPLEX,MIXED} if the node has no, simple, complex, or mixed content.

hasAttributeNS

hasAttributeNS: function( node,

uri,

name )

Determine whether a node has a particular attribute matching the given name and namespace.

Parameters

node	{Element} Node on which to search for an attribute.
uri	{String} Namespace URI.
name	{String} Local name of the attribute (without the prefix).

Returns

{Boolean} The node has an attribute matching the name and namespace.

setAttributeNS

setAttributeNS: function( node,

uri,

name,

value )

Adds a new attribute or changes the value of an attribute with the given namespace and name.

Parameters

node	{Element} Element node on which to set the attribute.
uri	{String} Namespace URI for the attribute.
name	{String} Qualified name (prefix:localname) for the attribute.
value	{String} Attribute value.

getChildEl

getChildEl: function( node,

name,

uri )

Get the first child element. Optionally only return the first child if it matches the given name and namespace URI.

Parameters

node	{DOMElement} The parent node.
name	{String} Optional node name (local) to search for.
uri	{String} Optional namespace URI to search for.

Returns

{DOMElement} The first child. Returns null if no element is found, if something significant besides an element is found, or if the element found does not match the optional name and uri.

getNextEl

getNextEl: function( node,

name,

uri )

Get the next sibling element. Optionally get the first sibling only if it matches the given local name and namespace URI.

Parameters

node	{DOMElement} The node.
name	{String} Optional local name of the sibling to search for.
uri	{String} Optional namespace URI of the sibling to search for.

Returns

{DOMElement} The next sibling element. Returns null if no element is found, something significant besides an element is found, or the found element does not match the optional name and uri.

lookupNamespaceURI

lookupNamespaceURI: function( node,

prefix )

Takes a prefix and returns the namespace URI associated with it on the given node if found (and null if not). Supplying null for the prefix will return the default namespace.

For browsers that support it, this calls the native lookupNamesapceURI function. In other browsers, this is an implementation of http://www.w3.org /TR /DOM-Level-3-Core /core.html#Node3-lookupNamespaceURI.

For browsers that don’t support the attribute.ownerElement property, this method cannot be called on attribute nodes.

Parameters

node	{DOMElement} The node from which to start looking.
prefix	{String} The prefix to lookup or null to lookup the default namespace.

Returns

{String} The namespace URI for the given prefix. Returns null if the prefix cannot be found or the node is the wrong type.

OpenLayers. Format. XML. lookupNamespaceURI

Takes a prefix and returns the namespace URI associated with it on the given node if found (and null if not). Supplying null for the prefix will return the default namespace.

For browsers that don’t support the attribute.ownerElement property, this method cannot be called on attribute nodes.

Parameters

node	{DOMElement} The node from which to start looking.
prefix	{String} The prefix to lookup or null to lookup the default namespace.

Returns

{String} The namespace URI for the given prefix. Returns null if the prefix cannot be found or the node is the wrong type.