I just noticed it :-(. Thanks very much. This is exactly what I am looking for
but did not find it in the ebooks I bought. This will be one of my wicket bible
pieces and probably I would keep complaining to get more messages from saints.
Apologies in advance.
>have you noticed that no one else is finding this particularly hard?
>
>class dataconverter implements imodel {
> final imodel model;
>
> public dataconverter(imodel model) { this.model=model; }
> public void detach() { model.detach(); }
>
> public Object getObject() { return convertToComponent(model.getobject()); }
> public void setObject() { model.setObject(convertFromComponent(object); }
>
> protected abstract Object convertToComponent(Object o);
> protected abstract Object convertFromComponent(Object o);
>}
>
>add(new CheckBox("foo") {
> protected imodel initmodel() {
> return new dataconverter(super.initmodel()){
> protected Object convertToComponent(Object o) {
> if (o.tostring().equals("y")) { return true; } else
>{return false; }
> }
> protected Object convertFromComponent(Object o) {
> if (((boolean)o)==true) { return "y"; } else { return "n"; }
> }
> }
>}
>
>now it looks just like the converter...all it takes is a little bit of
>thinking and a little less complaining.
>
>-igor
>
>
>On Tue, Mar 25, 2008 at 4:21 PM, <[EMAIL PROTECTED]> wrote:
>> Mine is not working. I feel these "basic" data manipulation tasks
>> are little to "heavy" in Wicket. Some built-in custom/helper classes
>> could help a bit. I found I am writing many of these kind of custom
>> class to do basic conversion and still have to worry if I am doing right,
>> like the detach() method Igor just pointed out.
>>
>>
>>
>> >wondering if that really always works.
>> >looking at the current getConverter doc:
>> >
>> >/**
>> > * CheckBox will by default always just use the boolean converter
>> >because the implementation
>> > * expects that the string is can be converted to a boolean [EMAIL
>> PROTECTED]
>> >Strings#isTrue(String)}
>> > *
>> > * @see org.apache.wicket.Component#getConverter(java.lang.Class)
>> > */
>> > public IConverter getConverter(Class type)
>> > {
>> > return BooleanConverter.INSTANCE;
>> > }
>> >
>> >but i guess yours works by accident because
>> >Strings#isTrue(String) returns the right value for Y or N
>> >
>> >Also with generics i believe we have this:
>> >
>> >public class Checkbox extends FormComponent<Boolean>
>> >
>> >so the model type is hard to a boolean.
>> >
>> >johan
>> >
>> >
>> >On Tue, Mar 25, 2008 at 11:30 PM, <[EMAIL PROTECTED]> wrote:
>> >
>> >> I just tested and it worked. Thanks very much.
>> >> Pardon me for being stubbon here. For a simple
>> >> convertion like this, So much has to be created so it seems a little
>heavy
>> >> weight.
>> >> For this one,
>> >> first a subclass of Checkbox (possibly creating multiple constructors)
>> >> overide initmodel and separate custom model class just to convert
>> >> a simple data object to another. I'd still prefer the direct converter
>> >> method.
>> >> Even though one could see it as in business domain, this kind of
>> >> conversion
>> >> is generic enough to be put in the convert phase. Also, I saw you
>saying
>> >> about
>> >> the detach() method, it could add some performance overhead, I guess.
>> >> Could you show me what I am doing wrong below for the converter method?
>> >> If this works, I'd even suggest to make it in the wicket core
>release:-)
>> >> by adding a method such as
>> >> new CheckBox(id).setTrueFalse("y","n"), you get the idea.
>> >>
>> >> public class CheckBoxYN extends CheckBox{
>> >>
>> >> public CheckBoxYN(String id){
>> >> super(id);
>> >> }
>> >>
>> >> @Override
>> >> public final IConverter getConverter(Class arg0){
>> >> IConverter icYN = new IConverter(){
>> >>
>> >> public Object convertToObject(String arg0, Locale arg1) {
>> >> if (arg0.equals("true")){
>> >> return 'Y';
>> >> }else{
>> >> return 'N';
>> >> }
>> >>
>> >> }
>> >>
>> >> public String convertToString(Object arg0, Locale arg1) {
>> >> if(arg0.toString().equals('Y')){
>> >> return "true";
>> >>
>> >> }else{
>> >> return "false";
>> >> }
>> >>
>> >> }
>> >>
>> >> };
>> >> return icYN;
>> >> }
>> >>
>> >> }
>> >>
>> >>
>> >>
>> >> >what i have shown you will work independently of the fact that you are
>> >> >sure or not :)
>> >> >
>> >> >-igor
>> >> >
>> >> >
>> >> >On Tue, Mar 25, 2008 at 2:51 PM, <[EMAIL PROTECTED]> wrote:
>> >> >> I am not sure how this would solve my problem
>> >> >> I intend to only use
>> >> >> new CheckBox("checked") without adding any other arguments
>> >> >> since I expect it to resolve the form's compoundpropertymodel
>> >> >> whose object is entitybean with "checked" as column name.
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >> >or you can simply do:
>> >> >> >
>> >> >> >class YesNoCheckBox extends CheckBox {
>> >> >> >
>> >> >> > protected IModel initModel() {
>> >> >> > return new CheckBoxYesNoModel(super.initModel());
>> >> >> > }
>> >> >> >}
>> >> >> >
>> >> >> >-igor
>> >> >> >
>> >> >> >On Tue, Mar 25, 2008 at 2:29 PM, <[EMAIL PROTECTED]> wrote:
>> >> >> >> Use model decorator sometimes seems troublesome.
>> >> >> >> I need to use a form containing a lot of checkboxes and other
>> >> types
>> >> >> >> with compoundproperty model with a entity bean, say record.
>> >> >> >> Most formcoponent ids are identical to their record property
>name,
>> >> >> >> such as Textfield("firstName") and record also has "firstName"
>> >> >> >> if I use the extra decorator indirection for checkbox,
>> >> >> >> I'd have to use
>> >> >> >> CheckBox("checked",new CustomerModel(new
>> >> >PropertyModel(record,"checked"))
>> >> >> >> or is there a better/convenient way to do this?
>> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >> >you forgot the important detach() { room.detach(); }
>> >> >> >> >
>> >> >> >>
>> >> >> >> >-igor
>> >> >> >> >
>> >> >> >> >
>> >> >> >> >On Tue, Mar 25, 2008 at 1:52 PM, Timo Rantalaiho
>> >> ><[EMAIL PROTECTED]>
>> >> >> >> >wrote:
>> >> >> >> >>
>> >> >> >>
>> >> >> >>
>> >> >> >> >> On Tue, 25 Mar 2008, [EMAIL PROTECTED] wrote:
>> >> >> >> >> > Is there built-in mechanism to auto convert the checkbox
>> >> model
>> >> >value
>> >> >> >> >> > to be a character set Y/N or Yes/No or any other pairs?
>> >> >> >> >> > This is frequently used pattern.
>> >> >> >> >>
>> >> >> >> >> Probably you could set your own IConverter on the component
>> >> >> >> >> corresponding the checkbox. The converter can then be
>reused
>> >> >> >> >> as needed.
>> >> >> >> >>
>> >> >> >> >> I've typically (if not always) used checkboxes with custom
>> >> models
>> >> >> >> >> directly toggling things in domain objects, e.g.
>> >> >> >> >>
>> >> >> >> >> class RoomReservedModel extends Model {
>> >> >> >> >> private IModel room;
>> >> >> >> >>
>> >> >> >> >> public RoomReservedModel(IModel room) {
>> >> >> >> >> this.room = room;
>> >> >> >> >> }
>> >> >> >> >>
>> >> >> >> >> @Override
>> >> >> >> >> public void setObject(Object object) {
>> >> >> >> >> room().setReserved((Boolean) object);
>> >> >> >> >> }
>> >> >> >> >>
>> >> >> >> >> @Override
>> >> >> >> >> public Object getObject() {
>> >> >> >> >> return room().isReserved();
>> >> >> >> >> }
>> >> >> >> >>
>> >> >> >> >> private Room room() {
>> >> >> >> >> return (Room) room.getObject();
>> >> >> >> >> }
>> >> >> >> >> }
>> >> >> >> >>
>> >> >> >> >> Best wishes,
>> >> >> >> >> Timo
>> >> >> >> >>
>> >> >> >> >> --
>> >> >> >> >> Timo Rantalaiho
>> >> >> >> >> Reaktor Innovations Oy <URL: http://www.ri.fi/ >
>> >> >> >> >>
>> >> >> >> >>
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