I tried replacing the <form-property name="subForm1" type="SubForm[]"/>
with:
<form-property name="subForm1" type="com.mysite.LazyValidatorForm[]"/>
And I get the following when I hit the submit button on my form:
Root Cause
java.lang.ArrayIndexOutOfBoundsException
at java.lang.reflect.Array.get(Native Method)
at
org.apache.struts.action.DynaActionForm.get(DynaActionForm.java:296)
at
org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyUt
ils.java:474)
at
org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyUt
ils.java:428)
at
org.apache.commons.beanutils.PropertyUtils.getNestedProperty(PropertyUti
ls.java:770)
at
org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.jav
a:801)
at
org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:881)
at
org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:808)
at
org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1252)
at
org.apache.struts.action.RequestProcessor.processPopulate(RequestProcess
or.java:821)
at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
254)
at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
-----Original Message-----
From: Takhar, Sandeep [mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 21, 2004 7:44 AM
To: Struts Users Mailing List
Subject: RE: Creating an indexed property of DynaActionForms
Use the lazyValidatorActionForm, which allows you to keep things request
scope when using arrays.
http://www.niallp.pwp.blueyonder.co.uk/
<form-bean name="SampleMain"
type="org.apache.struts.validator.DynaValidatorForm">
<form-property name="subForm1" type="java.util.ArrayList"/>
<form-property name="subForm2" type="java.util.ArrayList"/>
</form-bean>
Unfortunately I haven't tried this, but am pretty sure it works.
sandeep
-----Original Message-----
From: Nathan Ewing [mailto:[EMAIL PROTECTED]
Sent: Tuesday, April 20, 2004 5:49 PM
To: [EMAIL PROTECTED]
Subject: Creating an indexed property of DynaActionForms
I'm trying to figure out how to define and use a DynaActionForm which
has an indexed property that is another DynaActionForm. I'm using
struts 1.1. Here is something like what I mean:
First my sample struts-config.xml
----------------------------------
<form-bean name="SubForm"
type="org.apache.struts.validator.DynaValidatorForm">
<form-property name="property1"
type="java.lang.String"/>
<form-property name="property2"
type="java.lang.String"/>
</form-bean>
<form-bean name="SampleMain"
type="org.apache.struts.validator.DynaValidatorForm">
<form-property name="subForm1" type="SubForm[]"/>
<form-property name="subForm2" type="SubForm[]"/>
</form-bean>
And the JSP:
------------------
<table>
<c:forEach var="subForm1" items="${SampleMain.map.subForm1}"
varStatus="status">
<tr>
<td><html:text
property="subForm1[${status.index}].property1" size="5" />
<td><html:text
property="subForm1[${status.index}].property2" size="5" />
</tr>
</c:forEach>
</table>
Unfortunately this doesn't work. If I try making the subtypes SubForm[]
like above, I get a NullPointer exception when I try to start the
server, when struts tries to create the DynaForm classes.
If I make the property type Object[], I can successfully populate the
form, but when I try to save it, I get an ArrayOutOfBounds error when
struts tries to create the initial DynaForms (Obviously because it has
no idea what type of form to create, I think).
How do I make this work?
Also, once I start implementing validation on this form, is it going to
be possible to use struts validation to validate the subitems?
Thanks,
Nathan
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