The DOMSerializer is a facet of a serializer and is obtained from the asDOMSerializer() method of the (Serializer) interface. A serializer may or may not support a DOM serializer, if it does not then the return value from asDOMSerializer() is null.

Example:

 // Create a document to be serialized
 org.w3c.dom.Document doc = ...;
 
 // Create a Serializer that will be used
 // to serialize the document  
 org.apache.xml.serializer.Serializer ser = ...;

 // Set the Writer to write output to, and 
 // serialize the DOM using that Serializer
 java.io.StringWriter sw = new java.io.StringWriter();
 ser.setWriter(sw);
 DOMSerialzier dser = ser.asDOMSerializer();
 dser.serialize(doc);
 
 // Write out the serialized XML in the String.
 System.out.println(sw.toString());