Question

Hi !

I need help please, I want to write java code, but that is difficult for me. it is about using annotation, reflection and XLM_ file.

Please help me!

I want explaintion with code and I want to se result please!

My assignment is!

Using the annotations and reflection API write an XML file exporter for composite objects of any kind. That is, the exporter should rely only on the annotations in the class definitions of the composite objects to produce the exported XML. The XML tags are defined within the annotations, and otherwise the exporter is totally indifferent of the type of the exported object, as long as the required annotations are provided. In particular, there should be no explicit types (for example, Tree) mentioned in the code.

For example, for the following annotated class:

@Element(name="node")public class Tree<T> {

private Tree<T>[] children = null;private T value;

public Tree(T v, Tree<T>[] trees) { children = trees; value = v; }public Tree(T v) { value = v; }

1

@SubElements(name="subnodes")
public Tree<T>[] getChildren() { return children; }

    @ElementField(name="value")

public T getValue() { return value; } }

the following program (you have to implement the annotation classes and the Saver class with method save(Object o)):

Tree<String> t =
new Tree<String>("top",

new Tree[] {
new Tree("sub1"),new Tree("sub2")

});
Saver s = new Saver(); String r = s.save(t); System.out.println(r);

should produce this output:

<node value="top">
  <subnodes>

    <node value="sub1"/>

    <node value="sub2"/>
  </subnodes>

</node>

Thanks!

Answer 1