/** Create our child entries. */
private void createChildEntries() {
// get the current descriptors
List descriptors = computeMergedPropertyDescriptors();
// rebuild child entries using old when possible
childEntries = new PropertySheetEntry[descriptors.size()];
for (int i = 0; i < descriptors.size(); i++) {
IPropertyDescriptor d = (IPropertyDescriptor) descriptors.get(i);
// create new entry
PropertySheetEntry entry = new PropertySheetEntry();
entry.setDescriptor(d);
entry.setParent(this);
entry.setPropertySourceProvider(propertySourceProvider);
entry.refreshValues();
childEntries[i] = entry;
}
} /* (non-Javadoc)
/**
* Update our child entries. This implementation tries to reuse child entries if possible (if the
* id of the new descriptor matches the descriptor id of the old entry).
*/
private void refreshChildEntries() {
if (childEntries == null) // no children to refresh
return;
// get the current descriptors
List descriptors = computeMergedPropertyDescriptors();
// cache old entries by their descriptor id
Map entryCache = new HashMap(childEntries.length * 2 + 1);
for (int i = 0; i < childEntries.length; i++) {
entryCache.put(childEntries[i].getDescriptor().getId(), childEntries[i]);
} // create a list of entries to dispose
List entriesToDispose = new ArrayList(Arrays.asList(childEntries));
// rebuild child entries using old when possible
childEntries = new PropertySheetEntry[descriptors.size()];
boolean entriesChanged = descriptors.size() != entryCache.size();
for (int i = 0; i < descriptors.size(); i++) {
IPropertyDescriptor d = (IPropertyDescriptor) descriptors.get(i);
// see if we have an entry matching this descriptor
PropertySheetEntry entry = (PropertySheetEntry) entryCache.get(d.getId());
if (entry != null) { // reuse old entry
entry.setDescriptor(d);
entriesToDispose.remove(entry);
} else { // create new entry
entry = new PropertySheetEntry();
entry.setDescriptor(d);
entry.setParent(this);
entry.setPropertySourceProvider(propertySourceProvider);
entriesChanged = true;
}
entry.refreshValues();
childEntries[i] = entry;
}
if (entriesChanged) fireChildEntriesChanged();
// Dispose of entries which are no longer needed
for (int i = 0; i < entriesToDispose.size(); i++) {
((IPropertySheetEntry) entriesToDispose.get(i)).dispose();
}
}