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Each data binding supports one or more formats for the data in transit. A 'format' is a Java representation of XML. CXF works, primarily, with STaX. Thus, all data bindings must support XMLStreamReader and XMLStreamWriter as formats. Some interceptors expect to be able to read or write DOM Nodes. Thus, new data bindings should also support this format. Data bindings advertise their supported data formats via their implementation of two functions from DataBinding, e.g.:

   public Class<?>[] getSupportedReaderFormats() {
        return new Class[] {XMLStreamReader.class, Node.class};
    }

    public Class<?>[] getSupportedWriterFormats() {
        return new Class[] {XMLStreamWriter.class, Node.class};
    }