// Read a WSDL file precising expected extensions
MultipleExtReader reader = MultipleExtFactory.newInstance().newMultipleExtReader();
List<ExtensionFactory> factories = new ArrayList<ExtensionFactory>();
factories.add(SAWSDLFactory.newInstance());
Description desc = reader.read(factories, new URL("http://url/of/the/document.wsdl"));
// Here, the reader will prepare description in order to include directly SAWSDL tags

// We also can create a simple reader which only contains classical description
Description simpleDesc = reader.read(new URL("http://url/of/the/document.wsdl"));

// Write document
MultipleExtWriter writer = MultipleExtFactory.newInstance().newMultipleExtWriter();
Document doc = writer.getDocument(desc);

// Create description
Description desc = MultipleExtFactory.newInstance().newMultipleExtDescription();

// Using the "find" method, we can access to any extension specific methods
org.ow2.easywsdl.extensions.sawsdl.api.Description sawsdlDesc = null;
sawsdlDesc = desc.find(SAWSDLFactory.newInstance());
System.out.println(sawsdlDesc.getModelReference().toString());

// If an unexpected extension is called, the MultipleExtension plugin will 
// add new methods automatically to the main description
org.ow2.easywsdl.extensions.wsdl4bpel.api.Description wsdl4bpelDesc = null;
wsdl4bpelDesc = desc.find(WSDL4BPELFactory.newInstance());
System.out.println(wsdl4bpelDesc.getPartnerLinkTypes().get(0).getQName());
// Of course, this second "find" call will take more time than the first

<dependency>
  <groupId>org.ow2.easywsdl</groupId>
  <artifactId>easywsdl-ext-multiple</artifactId>
  <version>2.1</version>
</dependency>

<!-- Then all expected extensions -->