Return-Path: 
 <commons-user-return-10676-apmail-jakarta-commons-user-archive=jakarta.apache.org@jakarta.apache.org>
Delivered-To: apmail-jakarta-commons-user-archive@www.apache.org
Received: (qmail 19195 invoked from network); 29 Jan 2005 00:20:20 -0000
Received: from hermes.apache.org (HELO mail.apache.org) (209.237.227.199)
  by minotaur-2.apache.org with SMTP; 29 Jan 2005 00:20:20 -0000
Received: (qmail 72390 invoked by uid 500); 29 Jan 2005 00:20:15 -0000
Delivered-To: apmail-jakarta-commons-user-archive@jakarta.apache.org
Received: (qmail 72346 invoked by uid 500); 29 Jan 2005 00:20:15 -0000
Mailing-List: contact commons-user-help@jakarta.apache.org; run by ezmlm
Precedence: bulk
List-Unsubscribe: <mailto:commons-user-unsubscribe@jakarta.apache.org>
List-Subscribe: <mailto:commons-user-subscribe@jakarta.apache.org>
List-Help: <mailto:commons-user-help@jakarta.apache.org>
List-Post: <mailto:commons-user@jakarta.apache.org>
List-Id: "Jakarta Commons Users List" <commons-user.jakarta.apache.org>
Reply-To: "Jakarta Commons Users List" <commons-user@jakarta.apache.org>
Delivered-To: mailing list commons-user@jakarta.apache.org
Received: (qmail 72327 invoked by uid 99); 29 Jan 2005 00:20:15 -0000
X-ASF-Spam-Status: No, hits=0.0 required=10.0
	tests=RCVD_BY_IP,SPF_HELO_PASS,SPF_PASS
X-Spam-Check-By: apache.org
Received-SPF: pass (hermes.apache.org: domain of ksenji@gmail.com designates
 64.233.184.192 as permitted sender)
Received: from wproxy.gmail.com (HELO wproxy.gmail.com) (64.233.184.192)
  by apache.org (qpsmtpd/0.28) with ESMTP; Fri, 28 Jan 2005 16:20:14 -0800
Received: by wproxy.gmail.com with SMTP id 71so609483wri
        for <commons-user@jakarta.apache.org>;
 Fri, 28 Jan 2005 16:20:12 -0800 (PST)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
        s=beta; d=gmail.com;
        h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:references;
        b=Ihbo2vwsEfRy1c+YYLMneRN2xfMnIQNL6Z2hjc/L4Qeg3qaCxHZ1H7eUSQSU4vvExgiOrErLraz0BmbUQ9SgxS+45UtuSUUOV10QkdqqQAtL2xwy7VoafudF8Ij1gfczXhzCF/CC4H7kxyhA98Vw5vzHYObHOkKyjIpjVQ7oJNM=
Received: by 10.54.22.74 with SMTP id 74mr37674wrv;
        Fri, 28 Jan 2005 16:19:44 -0800 (PST)
Received: by 10.54.5.13 with HTTP; Fri, 28 Jan 2005 16:19:44 -0800 (PST)
Message-ID: <38e8470105012816198c25ff0@mail.gmail.com>
Date: Fri, 28 Jan 2005 16:19:44 -0800
From: Kishore Senji <ksenji@gmail.com>
Reply-To: Kishore Senji <ksenji@gmail.com>
To: Jakarta Commons Users List <commons-user@jakarta.apache.org>
Subject: Re: [digester] How to set a LazyDynaBean map-of-objects property?
In-Reply-To: <030f01c5056b$5ed58be0$030ea8c0@imbrium1>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
References: <030f01c5056b$5ed58be0$030ea8c0@imbrium1>
X-Virus-Checked: Checked
X-Spam-Rating: minotaur-2.apache.org 1.6.2 0/1000/N

On Fri, 28 Jan 2005 11:58:35 -0700, Wendy Smoak <java@wendysmoak.com> wrote:
> I'm trying to set a mapped property of a LazyDynaBean.  This is easy enough
> if the Map is String/String, but I'm having trouble populating a Map where
> the values are objects.
> 
> Example XML:
> <download><person><degree key="1123*12332" type="BS" major="Computer
> Science" /></person></download>
> 
> Assuming a LazyDynaBean got created earlier
>    digester.addObjectCreate("download", LazyDynaBean.class);
> 
> when I hit the <degree> tag, I create a DegreeViewImpl object and set its
> properties from the tag attributes...
>    digester.addObjectCreate("download/person/degree",
> DegreeViewImpl.class);
>    digester.addSetProperties("download/person/degree");
> 
> Now I need to pop the top object (the Degree) and call set( "degrees", key,
> degree) on the LazyDynaBean.  I need something like SetNextRule, but
> SetNextRule only allows a single parameter to be passed to the method it is
> told to call.
> 
> At this point I believe I have a DegreeViewImpl object on the top of the
> stack, and a LazyDynaBean just below it.  (Though the log messages I'm
> getting disagree.)  It looks like CallMethodRule can be told to call its
> method on an object further down the stack.  I tried this:
> 
>          Rule rule = new CallMethodRule( -1, "set", 3);  //also tried with
> 1 instead of -1
>         digester.addRule("/download/person/degree", rule);

shouldn't the pattern be "download/person/degree" without the "/" in
the beginning. Note 1 or -1 should both resolve in this case to the
LazyDynaBean object stored on the stack. So, either one should work
fine after removing the "/" in the pattern for the above line

>         digester.addObjectParam("download/person/degree", 0, "degrees");
>         digester.addCallParam("download/person/degree", 1, "key");
>         digester.addCallParam("download/person/degree", 2, true);
> 
> But the CallMethodRule never happens, the logs show the ObjectParamRule
> throwing a NPE, and complaining that the stack is empty.
> 
> Digester -   New match='download/person/degree'
> ... skip setting all the properties of the DegreeImpl, which works ...
> Digester -   Fire begin() for ObjectParamRule[paramIndex=0,
> attributeName=null, param=degrees]
> Digester - Empty stack (returning null)
> Digester - Begin event threw exception  java.lang.NullPointerException
>           at
> org.apache.commons.digester.ObjectParamRule.begin(ObjectParamRule.java:106)
> 
> (The entire log output with the code and example xml is posted here:
> http://wiki.wendysmoak.com/cgi-bin/wiki.pl?DigesterLazyDynaBean )
> 
> Does anyone see what I'm doing wrong?
> 
> And what's the proper way to refer to the stack elements.  If 0 is the top,
> is the next one -1 or 1?
> 
> Thanks,
> Wendy Smoak
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: commons-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: commons-user-help@jakarta.apache.org
> 
>

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