private boolean mustSendItemsetUpdate(
PropertyContext propertyContext, XFormsSelect1Control otherSelect1Control) {
if (getSelectionControl().hasStaticItemset()) {
// There is no need to send an update:
//
// 1. Items are static...
// 2. ...and they have been outputted statically in the HTML page, directly or in repeat
// template
return false;
} else if (isStaticReadonly()) {
// There is no need to send an update for static readonly controls
return false;
} else {
// There is a possible change
if (XFormsSingleNodeControl.isRelevant(otherSelect1Control) != isRelevant()) {
// Relevance changed
// Here we decide to send an update only if we become relevant, as the client will know that
// the
// new state of the control is non-relevant and can handle the itemset on the client as it
// wants.
return isRelevant();
} else if (!XFormsSingleNodeControl.isRelevant(this)) {
// We were and are non-relevant, no update
return false;
} else {
// If the itemsets changed, then we need to send an update
// NOTE: This also covers the case where the control was and is non-relevant
return !Itemset.compareItemsets(
otherSelect1Control.getItemset(propertyContext), getItemset(propertyContext));
}
}
}
@Override
protected void onCreate(PropertyContext propertyContext) {
super.onCreate(propertyContext);
// Evaluate itemsets only if restoring dynamic state
// NOTE: This doesn't sound like it is the right place to do this, does it?
if (containingDocument.isRestoringDynamicState(propertyContext)) getItemset(propertyContext);
}
/**
* Get itemset for a selection control given either directly or by id. If the control is null or
* non-relevant, lookup by id takes place and the control must have a static itemset or otherwise
* null is returned.
*
* @param pipelineContext current pipeline context
* @param containingDocument current containing document
* @param control control from which to obtain itemset (may be null if control has a static
* itemset)
* @param prefixedId prefixed id of control from which to obtain itemset (if control is null)
* @return itemset or null if it is not possible to obtain it
*/
public static Itemset getInitialItemset(
PipelineContext pipelineContext,
XFormsContainingDocument containingDocument,
XFormsSelect1Control control,
String prefixedId) {
if (control != null && control.isRelevant()) {
// Control is there and relevant so just ask it (this will include static itemsets evaluation
// as well)
return control.getItemset(pipelineContext);
} else if (isStaticItemset(containingDocument, prefixedId)) {
// Control is not there or is not relevant, so use static itemsets
// NOTE: This way we output static itemsets during initialization as well, even for
// non-relevant controls
return ((SelectionControl) containingDocument.getStaticState().getControlAnalysis(prefixedId))
.evaluateStaticItemset();
} else {
// Not possible so return null
return null;
}
}
