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Subject: RE: ArrayList and DynaActionForm--need help very badly
Date: Thu, 29 Apr 2004 16:44:15 -0500
Message-ID: 
 <9145180F5F33C243B7BB8C377FF8DA9A02F901B8@pfgdsmmbx004.principalusa.corp.principal.com>
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Thread-Topic: ArrayList and DynaActionForm--need help very badly
Thread-Index: AcQuK5+BPtsuM/tBT2y1QaZTFILy4wABnQ0g
From: "Mathew, Manoj" <Mathew.Manoj@principal.com>
To: "Struts Users Mailing List" <user@struts.apache.org>
X-OriginalArrivalTime: 29 Apr 2004 21:44:15.0586 (UTC)
 FILETIME=[1E110C20:01C42E33]
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Thanks God. I thought people lost interest in this one and i am left =
alone.Man i am having a tough time with this. All these days because of =
this Indexoutofbond, when evenr we needed a List as form element,we used =
to go for actionForm unnecessary. I thought of cleaning up some code and =
thats how i started this.

<action path=3D"/myOpen" =
type=3D"com.principal.group.acquire.proposal.ui.benefits.MyTestOpenAction=
" name=3D"mytestform" scope=3D"request">
		<forward name=3D"success" path=3D"/myTestJsp.jsp" />
		</action>
		<action path=3D"/mytestjsppostaction" =
type=3D"com.principal.group.acquire.proposal.ui.benefits.MyFormPost" =
name=3D"mytestform" scope=3D"request">
		<forward name=3D"success" path=3D"/myTestJsp.jsp" />
		</action>

open action seems to be working as i am able to see the values populated =
in the open action in the jsp page.
But when i click on the submit button "mytestjsppostaction.do" is called =
and i have break points in my dynaactionform as wel as in the first line =
of MyFormPost.java. The control first comes to the dyna actionform and =
then it seems like  calling beanutil.populate where the exception is =
thrown. It never comes to the MyFormPost.java

Thank-you,
Manoj Mathew


r
> >=20
> > I still get the same and agian nameList =3D null
> >=20
> >  [Servlet Error]-[BeanUtils.populate]:
> > java.lang.IndexOutOfBoundsException: Index: 4, Size:
> > 0
> > 	at
> >
>
c
> > Mathew,
> > Okay, forget about my previous email. Try this
> > instead. I didn't look at your code that closely
> > before.
> >=20
> >  		List mm =3D new ArrayList();
> >  		List nameList =3D ListUtils.lazyList(mm, new
> > Factory() {
> >  			public Object create() {
> >  				return new String();
> >  			}
> >  		});
> >  		set("friendName", nameList);
> >=20
> > Regards,
> >=20
> > Richard
> >=20
> >=20
> > 1) define the  the=20
> > --- "Mathew, Manoj" <Mathew.Manoj@principal.com>
> > wrote:
> > > Richard=20
> > >  when i use that wasy i get this error
> > > The following exception was logged
> > > java.lang.NullPointerException: The type for
> > > property friendName is invalid
> > > 	at
> > >
> >
> org.apache.struts.action.DynaActionForm.set(DynaActionForm.java:414)
> > >=20
> > > struts config
> > >=20
> > > <form-bean name=3D"mytestform"
> > > type=3D"org.apache.struts.action.DynaActionForm">
> > > 			<form-property name=3D"friendName"
> > >
> >
> type=3D"org.apache.commons.collections.ListUtils.LazyList"
> > > />
> > >=20
> > > Thank-you,
> > > Manoj Mathew
> > > GIS-Systems
> > > (515-362-0539)
> > >=20
> > >=20
> > > -----Original Message-----
> > > From: Richard Yee [mailto:ryee86@yahoo.com]
> > > Sent: Thursday, April 29, 2004 12:06 PM
> > > To: Struts Users Mailing List
> > > Subject: RE: ArrayList and DynaActionForm--need
> > help
> > > very badly
> > >=20
> > >=20
> > > Mathew,
> > > I think you are mixing the instructions that
> > > everyone
> > > has given you. If you use the LazyList as your
> > > form-property type in your form-bean, then you
> > don't
> > > need to put this code,
> > > > 		List mm =3D new ArrayList();
> > > > 		List nameList =3D ListUtils.lazyList(mm, new
> > > > Factory() {
> > > > 			public Object create() {
> > > > 				return "fakeName";
> > > > 			}
> > > > 		});
> > > > 		set("friendName", nameList);
> > >=20
> > > in your reset() method. In fact, you don't have to
> > > put
> > > any code that initializes your list because the
> > > LazyList takes care of that for you.
> > >=20
> > > In the solution I proposed in my previous emails,
> > I
> > > told you to put the code in the reset method only
> > > when
> > > you are using the plain ArrayList or a simple
> > array.
> > > This code is necessary to prevent the index out of
> > > bounds exception when you use these types with
> > > indexed
> > > properties.
> > >=20
> > >=20
> > > Regards,
> > >=20
> > > Richard
> > > --- "Mathew, Manoj" <Mathew.Manoj@principal.com>
> > > wrote:
> > > > Let me explain in detail
> > > >=20
> > > > I have a open action which just populate the
> > > > list..and forwarded to my jsp
> > > >=20
> > > > public class MyTestOpenAction extends Action {
> > > > 	public ActionForward execute(ActionMapping
> > > mapping,
> > > > ActionForm frm,
> > > > javax.servlet.http.HttpServletRequest request,
> > > > javax.servlet.http.HttpServletResponse response)
> > > > throws Exception {
> > > >=20
> > > > 		myTestForm form =3D (myTestForm) frm;
> > > >         form.set("myName","Manoj Mathew");
> > > > 		form.set("friendName", getMyList());
> > > > 		return mapping.findForward("success");
> > > > 	}
> > > >=20
> > > > 	private List getMyList() {
> > > >=20
> > > > 		List myList =3D new ArrayList();
> > > > 		myList.add(0, "Jimmy");
> > > > 		myList.add(1, "Tom");
> > > > 		myList.add(2, "Jack");
> > > >         myList.add(3, "Jack2");
> > > >         myList.add(4, "Jack3");
> > > > 		return myList;
> > > > 	}
> > > >=20
> > > > }
> > > >=20
> > > > and my jsp looks like this
> > > >=20
> > > >=20
> > > > <html:form method=3D"post"
> > > > action=3D"mytestjsppostaction.do">
> > > > <Table>
> > > > 	<TR><TD><font color=3D"red" face=3D"bold">My
> > Friend's
> > > > List</font></TD></TR>
> > > > 	<TR><TD><html:text property=3D"myName"
> > > maxlength=3D"64"
> > > > size=3D"50"/></td></TR>
> > > > <% for(int i=3D0; i<5; i++){ %>
> > > > <% String name1 =3D "friendName[" + i+ "]";%>
> > > > 	<tr>
> > > > 		<td> My Friend <%=3D i %></td>
> > > > 		<td><html:text property=3D"<%=3Dname1%>"
> > > maxlength=3D"6"
> > > > size=3D"6" /></TD>
> > > > 	</tr>
> > > > <% } %>
> > > > <tr><td><html:submit property=3D"censusSubmit"
> > > > value=3D"Submit" /> </td></tr>
> > > > </table>
> > > > </html:form>
> > > >=20
> > > > and struts config=20
> > > > <form-bean name=3D"mytestform"
> > > >
> > >
> >
> type=3D"com.principal.group.acquire.proposal.ui.benefits.myTestForm">
> > > > 			<form-property name=3D"friendName"
> > > > type=3D"java.util.List" />
> > > > 			<form-property name=3D"myName"
> > > > type=3D"java.lang.String" />
> > > > 		</form-bean>
> > > >=20
> > > >=20
> > > > so the data populated  by the open action is
> > shown
>=20
=3D=3D=3D message truncated =3D=3D=3D



=09
	=09
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