indexed properties problem

[Brian Moseley <bc...@covalent.net>]

i'm having a problem with struts' population of a form with an indexed 
property. specifically, BeanUtils.setProperty is barfing (and something 
in the stack is annoyingly swallowing the exception) when trying to set 
a nested property on the indexed property.

(see the form, jsp, generated html and log output snippets below)

this is my first real attempt at using indexed properties, so i may have 
missed something obvious. i read the user guide section and the faq page 
before starting, but that doc doesn't seem to cover precisely what i'm 
doing.

i wonder if the problem is that the IpValue[] form property has size 
zero when the bean is populated? i assumed that BeanUtils would 
instantiate the array and set it as needed, retrieving and growing it 
each time setProperty is called for the indexed field. to see if i was 
wrong, i tried using the setter signature that's found in the faq entry 
(see indexed setter snippet below), but i got the same result as before.

what am i missing? something simple, i'm sure.

thanks for your help!

== form class (relevant bits included)

public class PlatformForm extends ActionForm {

     private IpValue[] ip;

     public IpValue[] getIp() {
	return this.ip;
     }

     public void setIp(IpValue[] ip) {
         this.ip = ip;
     }

}

== jsp (static text removed for bretivy)

<logic:iterate collection="${ips}" id="ip" indexId="index">
   <tr>
     <td><html:text size="30" name="ip" property="address" 
indexed="true"/></td>
     <td><html:text size="30" name="ip" property="netmask" 
indexed="true"/></td>
   </tr>
</logic:iterate>

== generated html

   <tr>
     <td><input type="text" name="ip[0].address" size="30" 
value="10.0.1.6"></td>
     <td><input type="text" name="ip[0].netmask" size="30" 
value="255.255.255.0"></td>
   </tr>

== log output

16:17:46,936 DEBUG [BeanUtils]   setProperty(startTime=now 
startMonth=null startDay=null startYear=null startHour=00 startMin=00 
startAmPm=am startTimeZone=PST recurInterval=null 
recurrenceFrequencyDaily=everyDay numDays=1 numWeeks=1 
recurrenceDay=[Ljava.lang.Integer;@74cc4e 
recurrenceFrequencyMonthly=onDay numMonths=1 recurrenceWeek=null 
eachDay=null endTime=none endMonth=null endDay=null rid=null type=null 
name=null location=null description=null  cpuCount=null cpuSpeed=null 
dhcpServer=null dnsServer=null fqdn=null gateway= ram=null ip=[], 
ip[0].address, [10.0.1.6])

== indexed setter

     public void setIp(int index, IpValue ip) {
         if (this.ip == null) {
             this.ip = new IpValue[0];
         }

         int numIps = this.ip.length;
         if (index >= numIps) {
             IpValue[] newIps = new IpValue[numIps+1];
             System.arraycopy(this.ip, 0, newIps, 0, numIps);
             this.ip = newIps;
         }

         this.ip[index] = ip;
     }



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