This problem has been discussed many times on this list. I recommend you search the archives.
In the mean time, have a look at using a lazy list. http://jakarta.apache.org/commons/collections/apidocs-COLLECTIONS_3_1/org/apache/commons/collections/ListUtils.html#lazyList(java.ut il.List,%20org.apache.commons.collections.Factory) You can place the lazy list invocation in the forms reset() so that a new lazy list gets created upon each call to reset(). In short the lazy list will use a designated factory to create an object an populate a list whose indexed location is null. There are other solutions as well. hth, robert > -----Original Message----- > From: jean michel corne [mailto:[EMAIL PROTECTED] > Sent: Tuesday, July 27, 2004 4:23 AM > To: [EMAIL PROTECTED] > Subject: DynaActionForm and ArrayList : IndexOutOfBoundsException > > > Hi Struts users, > > I have tried to use ArrayList in the DynaActionForm with Struts 1.1. > > Before the action is processed (processActionForm), I got an error: > java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 > java.util.ArrayList.RangeCheck(ArrayList.java:507) > java.util.ArrayList.get(ArrayList.java:324) > org.apache.struts.action.DynaActionForm.get(DynaActionForm.java:298) > > org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyUtils.java:474) > > org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyUtils.java:428) > > org.apache.commons.beanutils.PropertyUtils.getNestedProperty(PropertyUtils.java:770) > > org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.java:801) > org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:881) > org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:808) > org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1252) > > org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:821) > org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254) > org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) > org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525) > javax.servlet.http.HttpServlet.service(HttpServlet.java:717) > javax.servlet.http.HttpServlet.service(HttpServlet.java:810) > > > struts-config.xml : > <?xml version="1.0" encoding="UTF-8"?> > <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts > Configuration 1.1//EN" > "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd";> > <struts-config> > > <!-- ========== Form Bean Definitions ================================== --> > <form-beans> > <form-bean name="CalendarForm" type="fr.sipe.test.forms.CalendarForm" /> > <form-bean name="purchaseOrderBeanForm" > type="org.apache.struts.validator.DynaValidatorForm"><!-- > org.apache.struts.action.DynaActionForm--> > <form-property name="lines" type="fr.sipe.test.forms.POLine[]" size="4" > /> > <form-property name="arrayLines" type="java.util.ArrayList" size="4" /> > </form-bean> > </form-beans> > > <!-- ========== Global Exception Definitions ============================== --> > <global-exceptions /> > > <!-- ========== Global Forward Definitions =============================== --> > <global-forwards type="org.apache.struts.action.ActionForward"> > <forward name="calendarStyle" path="/css/calendar.css" /> > <forward name="calendarJs" path="/js/calendar.js" /> > <forward name="error" path="/error.jsp" /> > </global-forwards> > > <!-- ========== Action Mapping Definitions =============================== --> > <action-mappings type="org.apache.struts.action.ActionMapping"> > <action > input="/calendar.jsp" > name="CalendarForm" > path="/ViewCalendar" > scope="request" > type="fr.sipe.test.actions.ViewCalendarAction" > > <forward name="Success" path="/calendar.jsp" /> > </action> > > <action > path="/generateBeanPOForm" > input="/purchaseOrderBean.jsp" > type="fr.sipe.test.actions.GenerateBeanPOForm" > name="purchaseOrderBeanForm" > scope="request" > > <forward name="success" path="/purchaseOrderBean.jsp" redirect="false"/> > </action> > > <action > path="/generateBeanPO" > type="fr.sipe.test.actions.GenerateBeanPO" > name="purchaseOrderBeanForm" > scope="request" > input="/purchaseOrderBean.jsp"> > <forward name="success" path="/displayPurchaseOrderBean.jsp" > redirect="false"/> > </action> > </action-mappings> > > <message-resources parameter="resources.application" null="false" /> > > <controller processorClass="org.apache.struts.action.RequestProcessor" > contentType="text/html"/> > </struts-config> > > > > I'ved download the source code and traced the calls. The method that returns this > error is located in the class > BeanUtils.setProperty(Object bean, String name, Object value) > At the call: target = PropertyUtils.getProperty(bean, > name.substring(0, delim)); > > The bean is created but the size of the ArrayList is 0, so when calling the first > property at indexed 0, I got an error. > > Do you have any idea how to solve this problem (without using POJO array like > myBean[])? > > Thanks for your help > Jean-Michel > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
