object-serialization

I have the following form: <form id="MakeDocumentForm" name="MakeDocumentForm" action="Document/GetWordDocument" method="post" enctype="application/json"> <button type="submit" style="float:right;">Make Word Document</button> <textarea id="hiddenJson" name="hiddenJson" data-bind="text: ko.toJSON(viewModel.selectedDocument)" rows="5" cols="100" style="visibility:hidden;" > </textarea> </form> The data-bind attribute is knockoutjs - but this isn't important, the textarea correctly contains the JSON that is the serialized object. [HttpPost] public void GetWordDocument(DocumentModel hiddenJson) {

I am learning about object serialization for the first time. I tried reading and 'googling' for differences in the modules pickle and shelve but I am not sure I understand it. When to use which one? Pickle can turn every python object into stream of bytes which can be persisted into a file. Then why do we need the module shelve? Isn't pickle faster? pickle is for serializing some object (or objects) as a single bytestream in a file. shelve builds on top of pickle and implements a serialization dictionary where objects are pickled, but associated with a key (some string), so you can load your

Say you have these two classes, Foo and Bar where Bar extends Foo and implements Serializable class Foo { public String name; public Foo() { this.name = "Default"; } public Foo(String name) { this.name = name; } } class Bar extends Foo implements java.io.Serializable { public int id; public Bar(String name, int id) { super(name); this.id = id; } } Notice that Foo doesn't implement Serializable . So what happens when bar is serialized? public static void main(String[] args) throws Exception { FileOutputStream fStream=new FileOutputStream("objects.dat"); ObjectOutputStream oStream=new