UnmarshallerHandler (Java EE 5 SDK)

javax.xml.bind Interface UnmarshallerHandler

所有父接口:

ContentHandler

public interface UnmarshallerHandler

extends ContentHandler

Unmarshaller implemented as SAX ContentHandler.

Applications can use this interface to use their JAXB provider as a component in an XML pipeline. For example:

       JAXBContext context = JAXBContext.newInstance( "org.acme.foo" );

       Unmarshaller unmarshaller = context.createUnmarshaller();
 
       UnmarshallerHandler unmarshallerHandler = unmarshaller.getUnmarshallerHandler();

       SAXParserFactory spf = SAXParserFactory.newInstance();
       spf.setNamespaceAware( true );
 
       XMLReader xmlReader = spf.newSAXParser().getXMLReader();
       xmlReader.setContentHandler( unmarshallerHandler );
       xmlReader.parse(new InputSource( new FileInputStream( XML_FILE ) ) );

       MyObject myObject= (MyObject)unmarshallerHandler.getResult();                          
 

This interface is reusable: even if the user fails to unmarshal an object, s/he can still start a new round of unmarshalling.

从以下版本开始:

JAXB1.0

版本:

$Revision: 1.2 $ $Date: 2006/03/08 16:55:17 $

作者:

• Kohsuke KAWAGUCHI, Sun Microsystems, Inc.

另请参见:

Unmarshaller.getUnmarshallerHandler()

getResult

Object getResult()
                 throws JAXBException,
                        IllegalStateException

Obtains the unmarshalled result. This method can be called only after this handler receives the endDocument SAX event.

返回:

always return a non-null valid object which was unmarshalled.

抛出异常:

IllegalStateException - if this method is called before this handler receives the endDocument event.

JAXBException - if there is any unmarshalling error. Note that the implementation is allowed to throw SAXException during the parsing when it finds an error.

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