in api/src/main/java/jakarta/faces/component/UIData.java [908:1077]
private Collection<Object[]> saveDescendantComponentStates(UIComponent parent, boolean iterateFacets,
boolean saveChildFacets)
{
Collection<Object[]> childStates = null;
// Index to indicate how many components has been passed without state to save.
int childEmptyIndex = 0;
int totalChildCount = 0;
if (iterateFacets && parent.getFacetCount() > 0)
{
Iterator<UIComponent> childIterator = parent.getFacets().values().iterator();
while (childIterator.hasNext())
{
UIComponent child = childIterator.next();
if (!child.isTransient())
{
// Add an entry to the collection, being an array of two
// elements. The first element is the state of the children
// of this component; the second is the state of the current
// child itself.
if (child instanceof EditableValueHolder holder)
{
if (childStates == null)
{
childStates = new ArrayList<>(
parent.getFacetCount()
+ parent.getChildCount()
- totalChildCount
+ childEmptyIndex);
for (int ci = 0; ci < childEmptyIndex; ci++)
{
childStates.add(LEAF_NO_STATE);
}
}
childStates.add(child.getChildCount() > 0
? new Object[]{ EditableValueHolderState.create(holder),
saveDescendantComponentStates(child, saveChildFacets, true) }
: new Object[]{ EditableValueHolderState.create(holder), null });
}
else if (child.getChildCount() > 0 || (saveChildFacets && child.getFacetCount() > 0))
{
Object descendantSavedState = saveDescendantComponentStates(child, saveChildFacets, true);
if (descendantSavedState == null)
{
if (childStates == null)
{
childEmptyIndex++;
}
else
{
childStates.add(LEAF_NO_STATE);
}
}
else
{
if (childStates == null)
{
childStates = new ArrayList<>(
parent.getFacetCount()
+ parent.getChildCount()
- totalChildCount
+ childEmptyIndex);
for (int ci = 0; ci < childEmptyIndex; ci++)
{
childStates.add(LEAF_NO_STATE);
}
}
childStates.add(new Object[]{null, descendantSavedState});
}
}
else
{
if (childStates == null)
{
childEmptyIndex++;
}
else
{
childStates.add(LEAF_NO_STATE);
}
}
}
totalChildCount++;
}
}
if (parent.getChildCount() > 0)
{
for (int i = 0; i < parent.getChildCount(); i++)
{
UIComponent child = parent.getChildren().get(i);
if (!child.isTransient())
{
// Add an entry to the collection, being an array of two
// elements. The first element is the state of the children
// of this component; the second is the state of the current
// child itself.
if (child instanceof EditableValueHolder holder)
{
if (childStates == null)
{
childStates = new ArrayList<>(
parent.getFacetCount()
+ parent.getChildCount()
- totalChildCount
+ childEmptyIndex);
for (int ci = 0; ci < childEmptyIndex; ci++)
{
childStates.add(LEAF_NO_STATE);
}
}
childStates.add(child.getChildCount() > 0
? new Object[] { EditableValueHolderState.create(holder),
saveDescendantComponentStates(child, saveChildFacets, true) }
: new Object[] { EditableValueHolderState.create(holder), null });
}
else if (child.getChildCount() > 0 || (saveChildFacets && child.getFacetCount() > 0))
{
Object descendantSavedState = saveDescendantComponentStates(child, saveChildFacets, true);
if (descendantSavedState == null)
{
if (childStates == null)
{
childEmptyIndex++;
}
else
{
childStates.add(LEAF_NO_STATE);
}
}
else
{
if (childStates == null)
{
childStates = new ArrayList<>(
parent.getFacetCount()
+ parent.getChildCount()
- totalChildCount
+ childEmptyIndex);
for (int ci = 0; ci < childEmptyIndex; ci++)
{
childStates.add(LEAF_NO_STATE);
}
}
childStates.add(new Object[]{null, descendantSavedState});
}
}
else
{
if (childStates == null)
{
childEmptyIndex++;
}
else
{
childStates.add(LEAF_NO_STATE);
}
}
}
totalChildCount++;
}
}
return childStates;
}