javax.xml.bind
Interface UnmarshallerHandler

All Superinterfaces:

org.xml.sax.ContentHandler

All Known Implementing Classes:

JAXBUnmarshallerHandler

public interface UnmarshallerHandler
extends org.xml.sax.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.

See Also:

Unmarshaller.getUnmarshallerHandler()

Author:

• Kohsuke KAWAGUCHI, Sun Microsystems, Inc.

Since:

JAXB1.0

Method Summary

java.lang.Object

getResult() Obtains the unmarshalled result.

Methods inherited from interface org.xml.sax.ContentHandler

characters, endDocument, endElement, endPrefixMapping, ignorableWhitespace, processingInstruction, setDocumentLocator, skippedEntity, startDocument, startElement, startPrefixMapping

Method Detail

getResult

java.lang.Object getResult()
                           throws JAXBException,
                                  java.lang.IllegalStateException

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

Returns:

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

Throws:

java.lang.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.