Creates a new MessageFactory object that is an instance of the default implementation (SOAP 1.1), This method uses the following ordered lookup procedure to determine the MessageFactory implementation class to load:

Use the javax.xml.soap.MessageFactory system property.
Use the properties file "lib/jaxm.properties" in the JRE directory. This configuration file is in standard java.util.Properties format and contains the fully qualified name of the implementation class with the key being the system property defined above.
Use the Services API (as detailed in the JAR specification), if available, to determine the classname. The Services API will look for a classname in the file META-INF/services/javax.xml.soap.MessageFactory in jars available to the runtime.
Use the SAAJMetaFactory instance to locate the MessageFactory implementation class.

Returns: a new instance of a MessageFactory

Exceptions:

SOAPException if there was an error in creating the default implementation of the MessageFactory.