Java Doc for XMLBinding.java in  » Development » Javolution » javolution » xml » Java Source Code / Java DocumentationJava Source Code and Java Documentation

This class represents the binding between Java classes and their XML representation ( XMLFormat ); the binding may be shared among multiple XMLObjectReader / XMLObjectWriter instances (thread-safe).

Custom XML bindings can also be used to alias class names and ensure that the XML representation is:

• Impervious to obfuscation.
• Unnaffected by any class refactoring.
• Can be mapped to multiple implementations. For example:[code] // Creates a binding to serialize Swing components into high-level XML // and deserialize the same XML into SWT components. XMLBinding swingBinding = new XMLBinding(); swingBinding.setAlias(javax.swing.JButton.class, "Button"); swingBinding.setAlias(javax.swing.JTable.class, "Table"); ... XMLBinding swtBinding = new XMLBinding(); swtBinding.setAlias(org.eclipse.swt.widgets.Button.class, "Button"); swtBinding.setAlias(org.eclipse.swt.widgets.Table.class, "Table"); ... // Writes Swing Desktop to XML. XMLObjectWriter writer = new XMLObjectWriter().setBinding(swingBinding); writer.setOutput(new FileOutputStream("C:/desktop.xml")); writer.write(swingDesktop, "Desktop", SwingDesktop.class); writer.close(); // Reads back high-level XML to a SWT implementation! XMLObjectReader reader = new XMLObjectReader().setXMLBinding(swtBinding); reader.setInput(new FileInputStream("C:/desktop.xml")); SWTDesktop swtDesktop = reader.read("Desktop", SWTDesktop.class); reader.close(); [/code]

More advanced bindings can also be created through sub-classing.[code] // XML binding using reflection. public ReflectionBinding extends XMLBinding { public XMLFormat getFormat(Class cls) { Field[] fields = clt.getDeclaredFields(); return new XMLReflectionFormat(fields); } } // XML binding read from DTD input source. public DTDBinding extends XMLBinding { public DTDBinding(InputStream dtd) { ... } } // XML binding overriding statically bounded formats. public MyBinding extends XMLBinding { // Non-static formats use unmapped XMLFormat instances. XMLFormat _myStringFormat = new XMLFormat(null) {...} XMLFormat _myCollectionFormat = new XMLFormat(null) {...} public XMLFormat getFormat(Class cls) { if (String.class.equals(cls)) return _myStringFormat; if (Collection.class.isAssignableFrom(cls)) return _myCollectionFormat; return super.getFormat(cls); } } [/code]

The default XML binding supports all static XML formats (static members of the classes being mapped) as well as the following types:

• java.lang.Object (empty element)
• java.lang.Class
• java.lang.String
• java.lang.Appendable
• java.util.Collection
• java.util.Map
• java.lang.Object[]
• all primitive types wrappers (e.g. Boolean, Integer ...)