Package org.exolab.castor.xml

The XML Marshaller API

Version:

$Revision: 6213 $ $Date: 2003-03-03 00:05:44 -0700 (Mon, 03 Mar 2003) $

Author:

Keith Visco

Marshaller marshalls a Java object into an XML document. Unmarshaller unmarshalls an XML document back into a Java object.

The following example unmarshals the XML document product.xml into a Product object, performs simple changes to the object and then marshals it back into an XML document.

  Product      prod;
  File         file;

  file = new File( "product.xml" );

  // Unmarshal the document into an object
  prod = (Product) Unmarshaller.unmarshal( Product.class, new FileReader( file ) );

  // A 25% mark down for each product and mark as sale
  prod.markDown( 0.25 );
  prod.setOnSale( true );

  // Marshal the object into a document
  Marshaller.marshal( Product, new FileWriter( file ) );
    

In addition to static methods, marshaller objects can be created and set with a variety of options affecting how they will operation. The above example adapted to use a specific mapping file:

  Mapping      map;
  Unmarshaller umr;
  Marshaller   mar;

  // Load the specified mapping file
  map = new Mapping();
  map.loadMapping( "mapping.xml" );

  // Unmarshal the document into an object
  umr = new Unmarshaller( Product.class );
  umr.setMapping( mapping );
  prod = (Product) umr.unmarshal( new FileReader( file ) );

  : : :

  // Marshal the object into a document
  mar = new Marshaller( new FileWriter( file ) );
  mar.setMapping( mapping );
  mar.marshal( Product );