Hallejulah!! Thanks Dan.
I could not get the session scope on the form bean and logic:iterate tag to work first go so tried the LazyUtils option. Also changed from using an array to a List. Works a treat. My application now does the following. 1. Action reads list of data from database and displays on page. NB The database replaces a Property file as we are moving to a clustered environment. 2. User change values and submit. 3. Struts action class updates database. Sue - It is toasty warm here in Oz. -----Original Message----- From: Daniel Bl�zquez [mailto:[EMAIL PROTECTED] Sent: Tuesday, 16 December 2003 7:26 PM To: RALPH ROPER Subject: Re: [struts-nested] BeanUtils.populate exception Yes, solved with the help of Arron Bates (http://www.keyboardmonkey.com) The whole thread is in this message, however, if you prefer to read it one by one, you can search in the mail archive my name or the subject: [struts-nested] BeanUtils.populate exception Important steps: [read whole thread for more info] - Use List setters (instead of more problematic Object[] setters) public void setMonkeys(List newMonkeys){ this.monkeys = newMonkeys; } public List getMonkeys(){ return monkeys; } - Use struts-action session scope forms to avoid using LazyLists Both the action that shows the form and the action that processess it have to have session scope forms Daniel ----- Original Message ----- From: "Arron Bates" <[EMAIL PROTECTED]> To: "Daniel Bl�zquez" <[EMAIL PROTECTED]> Sent: Thursday, December 04, 2003 12:49 PM Subject: Re: Fw: [struts-nested] BeanUtils.populate exception > Daniel, > > I don't know the specifics of having a long primitive as the value for Age, > but what a lot of people do is to have a String property handle the input for > the application (because it can accept no number values), to which they > validate is a number before confinuing. One thing I do a fair bit of, is to > have the String property, but the rest of the application can use a converter > property. eg: > > private String strAge = null; > > public String getAge() { return strAge; } > public void setAge(String newAge) { this.strAge = newAge; } > > public long getAgeLong() { return Long.parseLong(strAge); } > > > ...this way, Struts can always set a string with the "age" property, and my > application can use the handier "getAgeLong" method. > > > Regarding my running monkey examples, they use the session scope. Simply > because it was more work to hook up a database etc. And, getting the indexes > working with the session scope was much harder. That is, until enough people > complained that my example didn't show how to use the request scope for > nesting beans that I wrote the LazyList/LazyMap utilities. The examples work > simply because the arrays are always in memory, and Struts is nevery trying to > populate a zero sized array. Which is what the LazyList prevents, by growing > to meet the index demand. > > > For your team bean, try setting your monkey's property to this... > > public void setMonkeys(List newMonkeys){ > this.monkeys = newMonkeys; > } > > public List getMonkeys(){ > return monkeys; > } > > ...just set and get lists. The latest Struts can handle this no problems, and > lets the lazy list work its magic. Otherwise you're back to array problems again. > > Give that a try and see how it goes. > > > Arron. > > > > > Arron: > > > > First of all, thank you for giving you personal email! ;o > > > > > What's the property that it's failing on?... is it the monkeys[i] > > property?... > > > > Yes, it is the monkeys[i] property. If I delete the "age" and the select > > "size", works fine > > > > > Moving to session scope would mean you don't have to use the LazyList. The > > > LazyList was devised to help people keep beans that use indexed properties out > > > of the session. But if you've put the beans into the session, then indexed > > > problems shouldn't happen due to pre-population. > > > > Sure!! but i've tried every advice i found in the mail-archive... > > and every combinatory of those advices ;) How do you do in > > keyboardmonkey examples for not using LazyLists? > > > > > Can you show me the code of the bean for this property?... > > > > the involved Form Bean MonkeyTeamForm > > ----------------------------------------------------- > > public class MonkeyTeamForm extends ValidatorForm implements Serializable{ > > > > private List monkeys = ListUtils.lazyList(new ArrayList(), new > > MonkeyFactory()); private String teamName; > > > > public void setMonkeys(Object[] newMonkeys){ > > > > // I tried too to initialize "monkeys" as a lazy list here too > > for (int i = 0; i < newMonkeys.length; i++){ > > monkeys.add(newMonkeys[i]); > > } > > } > > > > public Object[] getMonkeys(){ > > return monkeys.toArray(); > > } > > > > public void setTeamName(String newTeamName){ > > teamName = newTeamName; > > } > > > > public String getTeamName(){ > > return teamName; > > } > > > > [many more getters and setters that works ok] > > > > public void reset(ActionMapping mapping, HttpServletRequest > > request){ tecnologias = ListUtils.lazyList(new ArrayList(), new > > MonkeyFactory()); } > > > > public void reset(){ > > tecnologias = ListUtils.lazyList(new ArrayList(), new > > MonkeyFactory()); } } > > ---------------------------------------------------- > > > > The monkey class (Monkey Team contains "Monkey"s) > > ---------------------------------------------------- > > public class Monkey implements Serializable { > > private String name; > > private long age; [ITS A PROBLEM TO BE "LONG"?] > > private String size; > > > > public void setTeamName(String newTeamName){ > > teamName = newTeamName; > > } > > public String getTeamName(){ > > return teamName; > > } > > public void setAge(long newAge){ > > age = newAge; > > } > > public long getAge(){ > > return age; > > } > > public void setSize(String newSize){ > > size = newSize; > > } > > > > public String getSize(){ > > return size; > > } > > } > > --------------------------------------------------- > > > > The jsp form (MonkeyTeamForm) : (very similar to nested-tutorial "monkey > > with bananas") > > ---------------------------------------------------- > > <nested:form action="updateTeam"> > > <nested:write property="teamName"/> > > [many more simple selects and texts boxes] > > > > <nested:iterate property="monkeys"> > > <nested:write property="name"/> > > <nested:text property="age" size="10"/> > > > > <nested:select property="size"> > > <nested:options property="../sizesList"/> > > </nested:select> > > > > </nested:iterate> [if I delete "age" and "size" boxes, n.p.] > > > > </nested:form> > > ----------------------------------------------------- > > > > big-big Thank you > > > > Daniel > > > > ----- Original Message ----- > > From: "Arron Bates" <[EMAIL PROTECTED]> > > To: "Daniel Bl�zquez" <[EMAIL PROTECTED]> > > Sent: Thursday, December 04, 2003 5:02 AM > > Subject: Re: [struts-nested] BeanUtils.populate exception > > > > > Daniel, > > > > > > What's the property that it's failing on?... is it the monkeys[i] > > property?... > > > Can you show me the code of the bean for this property?... > > > > > > Moving to session scope would mean you don't have to use the LazyList. The > > > LazyList was devised to help people keep beans that use indexed properties > > out > > > of the session. But if you've put the beans into the session, then indexed > > > problems shouldn't happen due to pre-population. > > > > > > This problem would still exist even if you used the indexed tags. > > > > > > > > > Arron. > > > > > > > > > > > > > I have done rigth now a few more things but I still have the problem: > > > > > > > > - I have set the scope of the action to "session" > > > > > > > > - I have implemented the reset() method, instantiating collectiong > > > > using a LazyList > > > > > > > > Maybe its recommendable to switch to Indexed properties? i only > > > > wanted to do in the same way as Arron's monkey tree -so simple, and > > > > cute-... > > > > > > > > but nothing works! :( > > > > > > > > Any ideas please? > > > > > > > > ----- Original Message ----- > > > > From: "Daniel Bl�zquez" <[EMAIL PROTECTED]> > > > > To: <[EMAIL PROTECTED]> > > > > Sent: Tuesday, December 02, 2003 5:55 PM > > > > Subject: [struts-nested] BeanUtils.populate exception > > > > > > > > > Hi, > > > > > > > > > > I have been dealing with struts-nested taglibs for a few days (with > > the > > > > > unestimable help from Arron Bates in http://www.keyboardmonkey.com) > > and > > > > with > > > > > the great amount of messages of this topic in the mailing list. But I > > > > still > > > > > have the next problem: > > > > > > > > > > javax.servlet.ServletException: BeanUtils.populate > > > > > at org.apache.struts.util.RequestUtils.populate > > RequestUtils.java:1254) > > > > > > > > > > (no extra info about ArrayIndexOutOfBounds or a more detailed > > exception) > > > > > > > > > > when submitting a form that uses a nested collection of objects. Each > > > > object > > > > > is showing in the form a <select> and a <input text> box (as a form > > > > showing > > > > > monkeys, each monkey with a box for age and a <select> for size). > > > > > > > > > > <nested.form action="xxxx"> > > > > > > > > > > <nested:iterate property="monkeys"> > > > > > > > > > > <nested:write property="name"/> > > > > > <nested:text property="age" size="10"/> > > > > > <nested:select property="size"> > > > > > <nested:options property="../sizesList"/> > > > > > </nested:select> > > > > > > > > > > </nested:iterate> > > > > > > > > > > </nested.form> > > > > > > > > > > The form also has many more properties (including checkboxes and > > simple > > > > > selects) but these ones work correctly. > > > > > > > > > > Things I have already done: > > > > > > > > > > -- Initialize involved property according to thread > > > > > > > > > > > http://nagoya.apache.org/eyebrowse/[EMAIL PROTECTED] > > > > > pache.org&by=thread&from=240019 > > > > > (thanks Arron again and Brandon) > > > > > > > > > > -- provide setter in the form for the nested property with the > > signature: > > > > > public void setMonkeys(Object[] newMonkeys) > > > > > > > > > > -- provide setter in nested monkey object for the size > > > > > public void setSize(String newSize) > > > > > > > > > > I am really frustated because 'cant see what I am doing wrong!, any > > help > > > > > will be very appreciated > > > > > > > > > > TIA, > > > > > Daniel ________________________________________________________ NOTICE The information in this email and or any of the attachments may contain; a. 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