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<title>XML Parsing Example</title>
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//<![CDATA[
var format = new OpenLayers.Format.XML();
var doc = null;
function init() {
OpenLayers.Request.GET({
url: "xml/features.xml",
success: loadSuccess,
failure: loadFailure
});
}
function loadSuccess(request) {
updateStatus("loaded");
if(!request.responseXML.documentElement) {
doc = format.read(request.responseText);
} else {
doc = request.responseXML;
}
}
function loadFailure(request) {
updateStatus("failed to load");
}
function updateStatus(msg) {
document.getElementById("loadStatus").firstChild.nodeValue = msg;
}
function updateOutput(text) {
document.getElementById("output").firstChild.nodeValue = text;
}
function write() {
var text = format.write(doc);
updateOutput(text);
}
function getElementsByTagNameNS(node, uri, name) {
var nodes = format.getElementsByTagNameNS(node, uri, name);
var pieces = [];
for(var i=0; i<nodes.length; ++i) {
pieces.push(format.write(nodes[i]));
}
updateOutput(pieces.join(' '));
}
function hasAttributeNS(node, uri, name) {
updateOutput(format.hasAttributeNS(node, uri, name))
}
function getAttributeNodeNS(node, uri, name) {
var attributeNode = format.getAttributeNodeNS(node, uri, name);
updateOutput(attributeNode.nodeName + ' = "' +
attributeNode.nodeValue + '"');
}
function getAttributeNS(node, uri, name) {
var attributeValue = format.getAttributeNS(node, uri, name);
updateOutput('"' + attributeValue + '"')
}
function createElementNS(uri, name) {
var node = format.createElementNS(uri, name);
doc.documentElement.appendChild(node);
write();
}
function createTextNode(text) {
var node = format.createTextNode(text);
doc.documentElement.appendChild(node);
write();
}
window.onload = init;
//]]>
</script>
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<h1 id="title">XML Format Example</h1>
<div id="tags">
xml
</div>
<p id="shortdesc">
Shows the use of the OpenLayers XML format class
</p>
<div id="docs">
<p>OpenLayers has a very simple XML format class (OpenLayers.Format.XML)
that can be used to read/write XML docs. The methods available on the
XML format (or parser if you like) allow for reading and writing of the
various XML flavors used by the library - in particular the vector data
formats. It is by no means intended to be a full-fledged XML toolset.
Additional methods will be added only as needed elsewhere in the
library.</p>
<p>This page loads an XML document and demonstrates a few of the methods
available in the parser.</p>
<p>Status: <b>XML document <span id="loadStatus">loading..</span>.</b></p>
<p>After the XML document loads, see the result of a few of the methods
below. Assume that you start with the following code:
<br>
<span class="code">
var format = new OpenLayers.Format.XML();
</span>
</p>
Sample methods
<ul>
<li><a href="javascript:void write();">format.write()</a> - write the XML doc as text</li>
<li><a href="javascript:void getElementsByTagNameNS(doc, 'http://www.opengis.net/gml', 'MultiPolygon');">format.getElementsByTagNameNS()</a> - get all gml:MultiPolygon</li>
<li><a href="javascript:void hasAttributeNS(doc.documentElement, 'http://www.w3.org/2001/XMLSchema-instance', 'schemaLocation');">format.hasAttributeNS()</a> - test to see schemaLocation attribute exists in the http://www.w3.org/2001/XMLSchema-instance namespace</li>
<li><a href="javascript:void getAttributeNodeNS(doc.documentElement, 'http://www.w3.org/2001/XMLSchema-instance', 'schemaLocation');">format.getAttributeNodeNS()</a> - get schemaLocation attribute in the http://www.w3.org/2001/XMLSchema-instance namespace</li>
<li><a href="javascript:void getAttributeNS(doc.documentElement, 'http://www.w3.org/2001/XMLSchema-instance', 'schemaLocation');">format.getAttributeNS()</a> - get schemaLocation attribute value in the http://www.w3.org/2001/XMLSchema-instance namespace</li>
<li><a href="javascript:void createElementNS('http://bar.com/foo', 'foo:TestNode');">format.createElementNS()</a> - create a foo:TestNode element (and append it to the doc)</li>
<li><a href="javascript:void createTextNode('test text ');">format.createTextNode()</a> - create a text node (and append it to the doc)</li>
</ul>
Output:
<div id="output"> </div>
</div>
</body>
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