Return-Path: 
 <dev-return-131039-apmail-commons-dev-archive=commons.apache.org@commons.apache.org>
X-Original-To: apmail-commons-dev-archive@www.apache.org
Delivered-To: apmail-commons-dev-archive@www.apache.org
Received: from mail.apache.org (hermes.apache.org [140.211.11.3])
	by minotaur.apache.org (Postfix) with SMTP id 285579C72
	for <apmail-commons-dev-archive@www.apache.org>;
 Mon, 14 Nov 2011 08:02:37 +0000 (UTC)
Received: (qmail 93120 invoked by uid 500); 14 Nov 2011 08:02:36 -0000
Delivered-To: apmail-commons-dev-archive@commons.apache.org
Received: (qmail 92985 invoked by uid 500); 14 Nov 2011 08:02:34 -0000
Mailing-List: contact dev-help@commons.apache.org; run by ezmlm
Precedence: bulk
List-Help: <mailto:dev-help@commons.apache.org>
List-Unsubscribe: <mailto:dev-unsubscribe@commons.apache.org>
List-Post: <mailto:dev@commons.apache.org>
List-Id: <dev.commons.apache.org>
Reply-To: "Commons Developers List" <dev@commons.apache.org>
Delivered-To: mailing list dev@commons.apache.org
Received: (qmail 92977 invoked by uid 99); 14 Nov 2011 08:02:33 -0000
Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 14 Nov 2011 08:02:33 +0000
X-ASF-Spam-Status: No, hits=-0.7 required=5.0
	tests=FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS
X-Spam-Check-By: apache.org
Received-SPF: pass (athena.apache.org: domain of simone.tripodi@gmail.com
 designates 209.85.213.171 as permitted sender)
Received: from [209.85.213.171] (HELO mail-yx0-f171.google.com)
 (209.85.213.171)
    by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 14 Nov 2011 08:02:28 +0000
Received: by yenl7 with SMTP id l7so1092611yen.30
        for <dev@commons.apache.org>; Mon, 14 Nov 2011 00:02:07 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=mime-version:sender:date:x-google-sender-auth:message-id:subject
         :from:to:content-type;
        bh=8r9s+ZAXzuaJ1NzbYU69vRtWkTsUOW5Q2YkQp1tu/R0=;
        b=xkA7zUMC4btaPnJuBgifv1HvHBieQDttZPdcoNR5XxpK1bTiJpW3oHWoDKWdUclj6B
         kIlh9zydnE4GAjbIUzPP4CU1b3IDR+ZxUcasGSkHxfSnJJBktmb+egmVv+5FkxZxDjRu
         5SuIOncZoHb6uACO/S+o0l1BhYonT0Ny7NH0k=
MIME-Version: 1.0
Received: by 10.236.185.198 with SMTP id u46mr12505494yhm.113.1321257727612;
 Mon, 14 Nov 2011 00:02:07 -0800 (PST)
Sender: simone.tripodi@gmail.com
Received: by 10.151.15.14 with HTTP; Mon, 14 Nov 2011 00:02:07 -0800 (PST)
Date: Mon, 14 Nov 2011 09:02:07 +0100
X-Google-Sender-Auth: TPDAaSQkDfmPpmNRh7tjpFGsBp8
Message-ID: 
 <CAAqLGLNhoOqqSP-OyUYHyJotuDfYZ2Ldy761ZftCQx-av+jQKA@mail.gmail.com>
Subject: [digester] help on fixing DIGESTER-153
From: Simone Tripodi <simonetripodi@apache.org>
To: Commons Developers List <dev@commons.apache.org>
Content-Type: text/plain; charset=UTF-8

Hi all guys,
I'm writing to ask you all a big help on fixing that issues that is
spoling my sweet dreams and completely blocking for the rest :)

The well known issue is that the Digester has been able to create
objects using only the default empty constructor, that is because
instances are created when the XML elements begin.

Thanks to Matt Benson's effort, using CGLIB it is possible to create
instances using arbitrary constructors, extracting arguments from the
same matching XML element attributes.

I am sure we can do even more, extracting constructor arguments from
nested elements, I mean, given the following POJO:

class MyBean
{

  // (g|s)etter omitted
  private float floatProperty;

  public MyBean( double doubleProperty, boolean booleanProperty )
    ...
}

and the following XML snippet

<toplevel>
  <bean double="9.99">
    <boolean>true</boolean>
    <float>5.5</float>
  </bean>
</toplevel>

I would like - but don't know how, that's here that I need help - via
CGLIB (or something similar) implementing a Lazy Initialization policy
that allows us creating a proxy that tracks the Object methods
invocations, but the constructor and methods will be invoked only when
the matchin XML element terminates.

Just to be more clear:

<toplevel>
  <bean double="9.99">            <!-- create the MyBean Proxy,
register the 1st ctor argument -->
    <boolean>true</boolean>     <!-- register the 2nd ctor argument -->
    <float>5.5</float>                <!-- track invokation of the
setBeanProperty -->
  </bean>                                <!-- matche ends, invoke the
constructor and tracked methods -->
</toplevel>

Do you think that would be possible?
Many thanks in advance, all the best!
Simo

http://people.apache.org/~simonetripodi/
http://simonetripodi.livejournal.com/
http://twitter.com/simonetripodi
http://www.99soft.org/

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@commons.apache.org
For additional commands, e-mail: dev-help@commons.apache.org