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<TITLE>Converting an XML Fragment into a DOM Fragment (Java Developers Almanac Example)
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<h3>e512. Converting an XML Fragment into a DOM Fragment</h3>
This example demonstrates how to parse an XML string fragment into a
set of nodes suitable for insertion into a DOM document.
<pre> // Parses a string containing XML and returns a DocumentFragment
// containing the nodes of the parsed XML.
public static DocumentFragment parseXml(Document doc, String fragment) {
// Wrap the fragment in an arbitrary element
fragment = "<fragment>"+fragment+"</fragment>";
try {
// Create a DOM builder and parse the fragment
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
Document d = factory.newDocumentBuilder().parse(
new InputSource(new StringReader(fragment)));
// Import the nodes of the new document into doc so that they
// will be compatible with doc
Node node = doc.importNode(d.getDocumentElement(), true);
// Create the document fragment node to hold the new nodes
DocumentFragment docfrag = doc.createDocumentFragment();
// Move the nodes into the fragment
while (node.hasChildNodes()) {
docfrag.appendChild(node.removeChild(node.getFirstChild()));
}
// Return the fragment
return docfrag;
} catch (SAXException e) {
// A parsing error occurred; the xml input is not valid
} catch (ParserConfigurationException e) {
} catch (IOException e) {
}
return null;
}
</pre>
Here's an example that uses the method:
<pre> // Obtain an XML document; this method is implemented in
// <a href="../javax.xml.parsers/BasicDom.html" class="eglink"><b>e510</b> The Quintessential Program to Create a DOM Document from an XML File</a>
Document doc = <font color="#0066ff"><i>parseXmlFile</i></font>(<font color="#0066ff"><i>"infilename.xml"</i></font>, <font color="#0066ff"><i>false</i></font>);
// Create a fragment
DocumentFragment frag = parseXml(doc, <font color="#0066ff"><i>"hello <b>joe</b>"</i></font>);
// Append the new fragment to the end of the root element
Element element = doc.getDocumentElement();
element.appendChild(frag);
</pre>
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<b>Related Examples</b></font></td>
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e510. <a class="eglink" href="BasicDom.html?l=rel">
The Quintessential Program to Create a DOM Document from an XML File
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e511. <a class="eglink" href="CreateDom.html?l=rel">
Creating an Empty DOM Document
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e513. <a class="eglink" href="SetError.html?l=rel">
Handling Errors While Parsing an XML File
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See also:
<a class="eglink" href="/egs/javax.xml.parsers/pkg.html?l=rel#DOM%20Parsing%20Options">
DOM Parsing Options
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<a class="eglink" href="/egs/javax.xml.parsers/pkg.html?l=rel#SAX">
SAX
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