I posted much of the form bean code at the bottom. Aside for the two arrays
of SoldProperty, there are a bunch of getString and setString. This is part
of the bean SoldProperty (aka there are two arrays of SoldProperty in the
SoldProperty bean).
I altered the validate code and reset code so that it does the validating
and resetting for me, as follows:
If there is anything else you need please let me know.
Nathan
--------------------------------------------------------------------
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request, String[] propertyList) {
//Reset errors
errors = new ActionErrors();
ClassManager manager = new ClassManager (this);
for (int a = 0; a < propertyList.length; a++){
try {
String methodName = "validate" +
propertyList[a];
manager.runNoArgMethod(methodName);
} catch (NoSuchMethodException e){
//Method Doesn't exist, Don't worry
about it
} catch (IllegalAccessException e){
} catch
(java.lang.reflect.InvocationTargetException e){}
}
return errors;
}
public void reset(ActionMapping mapping, HttpServletRequest request)
{
ClassManager manager = new ClassManager (this);
for (int a = 0; a < DataMembers.length; a++){
try {
String methodName = "set" + DataMembers[a];
Class[] argTypes = {String.class};
Object[] args = {null};
manager.runMethod(methodName, argTypes,
args);
} catch (NoSuchMethodException e){
//Method Doesn't exist, Don't worry
about it
} catch (IllegalAccessException e){
} catch
(java.lang.reflect.InvocationTargetException e){}
}
}
-----Original Message-----
From: Mark Lowe [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 14, 2004 4:12 AM
To: Struts Users Mailing List
Subject: Re: BeanUtils.populate Invocation Error
I had a similar problem yesterday with multiple selected select menus.
What does your form bean look like and then your nested beans.
On 14 Jan 2004, at 03:57, Nathan Ewing wrote:
> I have a jsp page with a form on it using indexed properties. I have
> a bean
> with an array of beans that I use to connect with the jsp page. The
> page
> displays fine, but when I try to save it, I get the following error:
>
> javax.servlet.ServletException: BeanUtils.populate
> at
> org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1254)
> at
> org.apache.struts.action.RequestProcessor.processPopulate(RequestProces
> sor.j
> ava: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)
> at
> org.apache.catalina.core.StandardWrapperValve.invokeServletService(Stan
> dardW
> rapperValve.java:720)
> at
> org.apache.catalina.core.StandardWrapperValve.access$000(StandardWrappe
> rValv
> e.java:118)
> at
> org.apache.catalina.core.StandardWrapperValve$1.run(StandardWrapperValv
> e.jav
> a:278)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperVal
> ve.ja
> va:274)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 505)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextVal
> ve.ja
> va:212)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 505)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.jav
> a:203
> )
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 505)
> at
> com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcess
> or.ja
> va:157)
> at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
>
>
> Root Cause
>
> java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.ja
> va:39
> )
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccesso
> rImpl
> .java:25)
> at java.lang.reflect.Method.invoke(Method.java:324)
> at
> org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyU
> tils.
> java:493)
> at
> org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyU
> tils.
> java:428)
> at
> org.apache.commons.beanutils.PropertyUtils.getNestedProperty(PropertyUt
> ils.j
> ava:770)
> at
> org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.ja
> va:80
> 1)
> 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(RequestProces
> sor.j
> ava: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)
> at
> org.apache.catalina.core.StandardWrapperValve.invokeServletService(Stan
> dardW
> rapperValve.java:720)
> at
> org.apache.catalina.core.StandardWrapperValve.access$000(StandardWrappe
> rValv
> e.java:118)
> at
> org.apache.catalina.core.StandardWrapperValve$1.run(StandardWrapperValv
> e.jav
> a:278)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperVal
> ve.ja
> va:274)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 505)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextVal
> ve.ja
> va:212)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 505)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.jav
> a:203
> )
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:
> 505)
> at
> com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcess
> or.ja
> va:157)
> at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
> Caused by: java.lang.NullPointerException
> at
> com.mysite.bean.SoldProperty.getExclusiveSold(SoldProperty.java:573)
>
>
> Here is the relevant code:
>
>
> protected SoldProperty[] ExclusiveSold;
> protected SoldProperty[] BuyerSold;
>
> /**
> Set the Value of ExclusiveSold to ExclusiveSoldValue
>
> @param ExclusiveSoldValue The value of the variable ExclusiveSold
> in the Object
> */
> public void setExclusiveSold (SoldProperty[] ExclusiveSoldValue) {
> ExclusiveSold = ExclusiveSoldValue;
> }
> /**
> Get the Value of ExclusiveSold
>
> @return The Value of ExclusiveSold
> */
> public SoldProperty[] getExclusiveSold (){
> return ExclusiveSold;
> }
>
> /**
> Set the Value of ExclusiveSold to ExclusiveSoldValue
>
> @param ExclusiveSoldValue The value of the variable ExclusiveSold
> in the Object
> */
> public void setExclusiveSold (int index, SoldProperty
> ExclusiveSoldValue) {
> ExclusiveSold[index] = ExclusiveSoldValue;
> }
> /**
> Get the Value of ExclusiveSold
>
> @return The Value of ExclusiveSold
> */
> public SoldProperty getExclusiveSold (int index){
> return ExclusiveSold[index];
> }
>
>
> /**
> Set the Value of BuyerSold to BuyerSoldValue
>
> @param BuyerSoldValue The value of the variable BuyerSold in the
> Object
> */
> public void setBuyerSold (SoldProperty[] BuyerSoldValue) {
> BuyerSold = BuyerSoldValue;
> }
> /**
> Get the Value of BuyerSold
>
> @return The Value of BuyerSold
> */
> public SoldProperty[] getBuyerSold (){
> return BuyerSold;
> }
>
> /**
> Set the Value of BuyerSold to BuyerSoldValue
>
> @param BuyerSoldValue The value of the variable BuyerSold in the
> Object
> */
> public void setBuyerSold (int index, SoldProperty BuyerSoldValue) {
> BuyerSold[index] = BuyerSoldValue;
> }
> /**
> Get the Value of BuyerSold
>
> @return The Value of BuyerSold
> */
> public SoldProperty getBuyerSold (int index){
> return BuyerSold[index];
> }
>
> And the jsp code:
>
> <c:forEach var="exclusive" items="${SoldProperty.exclusiveSold}"
> varStatus="status">
> <tr>
> <td bgcolor="#E0E8F5" align="center"><c:out
> value="${exclusive.soldDate}"/></td>
> <td bgcolor="#E0E8F5"><html-el:hidden
> property="exclusiveSold[${status.index}].soldId"/><a
> href="Marketing.app?action=edit&id=<c:out
> value="${exclusive.mlsNumber}"/>"><c:out
> value="${exclusive.streetNumber}"/>
> <c:out value="${exclusive.street}"/> <c:out
> value="${exclusive.aptNumber}"/></a></td>
> <td bgcolor="#E0E8F5" align="center"><c:out
> value="${exclusive.price}"/></td>
> <td bgcolor="#E0E8F5"
> align="center"><html-el:checkbox
> property="exclusiveSold[${status.index}].showListing" /></td>
> <td bgcolor="#E0E8F5"
> align="center"><html-el:checkbox
> property="exclusiveSold[${status.index}].showPrice" /></td>
> <td bgcolor="#E0E8F5"
> align="center"><html-el:checkbox
> property="exclusiveSold[${status.index}].showAptNumber" /></td>
> <td bgcolor="#E0E8F5" align="center"><html-el:text
> property="exclusiveSold[${status.index}].displayPrice" size="8" /></td>
> </tr>
> </c:forEach>
>
>
> <c:forEach var="buyer" items="${SoldProperty.buyerSold}"
> varStatus="status">
> <tr>
> <td bgcolor="#E0E8F5" align="center"><c:out
> value="${buyer.soldDate}"/></td>
> <td bgcolor="#E0E8F5"><html-el:hidden
> property="buyerSold[${status.index}].soldId"/><a
> href="soldProperty.app?action=edit&id=<c:out
> value="${buyer.soldId}"/>"><c:out value="${buyer.streetNumber}"/>
> <c:out
> value="${buyer.street}"/> <c:out value="${buyer.aptNumber}"/></a></td>
> <td bgcolor="#E0E8F5" align="center"><c:out
> value="${buyer.price}"/></td>
> <td bgcolor="#E0E8F5"
> align="center"><html-el:checkbox
> property="buyerSold[${status.index}].showListing" /></td>
> <td bgcolor="#E0E8F5"
> align="center"><html-el:checkbox
> property="buyerSold[${status.index}].showPrice" /></td>
> <td bgcolor="#E0E8F5"
> align="center"><html-el:checkbox
> property="buyerSold[${status.index}].showAptNumber" /></td>
> <td bgcolor="#E0E8F5" align="center"><html-el:text
> property="buyerSold[${status.index}].displayPrice" size="8" /></td>
> </tr>
> </c:forEach>
>
>
>
> Any ideas why I'm getting this error? And how to fix it?
>
> Thanks,
> Nathan Ewing
>
>
>
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