my value attribute in my selectManyCheckbox gets overriden wehn updating via ajax. Here is my jsf (1.2)
<h:selectManyCheckbox
id="SelectManyCheckbox"
valueChangeListener="#{parameter.valueChanged}"
value="#{parameter.selectedValues}">
<a4j:support
event="onclick"
reRender="selectionPanel" />
<f:selectItems
value="#{parameter.values}" />
</h:selectManyCheckbox>
This is the Parameter class (simplified):
public class Parameter {
List<String> selectedValues;
SelectItemList values;
public void valueChanged(ValueChangeEvent event) {
// here new values and new selectedValues will be set via
// the setters of the two fields
}
}
The Problem is, that the new values will be set and displayed correctly, but the selectedValues will stay on the value before the ajax event. I debugged it and i can see that the selectedValues get set correctly but the old selectedValues from before the ajax event will be set during the rerender of the selectionPanel.
When I trigger the event multiple times i can see, that my selectedValues are always overwritten by the value before, like this:
Here a part of the stacktrace that overwrites the selectedValue:
com.my.package.structure.Parameter:setSelectedValues
sun.reflect.NativeMethodAccessorImpl:invoke0
sun.reflect.NativeMethodAccessorImpl:invoke
sun.reflect.DelegatingMethodAccessorImpl:invoke
java.lang.reflect.Method:invoke
javax.el.BeanELResolver:setValue
javax.el.CompositeELResolver:setValue
org.apache.myfaces.el.unified.resolver.FacesCompositeELResolver:setValue
org.apache.el.parser.AstValue:setValue
org.apache.el.ValueExpressionImpl:setValue
com.sun.facelets.el.TagValueExpression:setValue
javax.faces.component.UIInput:updateModel
javax.faces.component.UIInput:processUpdates
The solution was to use a simple Array rather than a List.
public class Parameter {
String[] selectedValues; //CHANGED
SelectItemList values;
public void valueChanged(ValueChangeEvent event) {
// here new values and new selectedValues will be set via
// the setters of the two fields
}
}