melloware commented on PR #593:
URL: https://github.com/apache/myfaces/pull/593#issuecomment-1620442210
So Mojarra wrote a custom iterator so it could properly handle this scenario.
```java
// ---------------------------------------------------------- Inner Classes
private static final class ComponentMessagesIterator implements
Iterator<FacesMessage> {
private Map<String, List<FacesMessage>> messages;
private int outerIndex = -1;
private int messagesSize;
private Iterator<FacesMessage> inner;
private Iterator<String> keys;
// -------------------------------------------------------
Constructors
ComponentMessagesIterator(Map<String, List<FacesMessage>> messages) {
this.messages = messages;
messagesSize = messages.size();
keys = messages.keySet().iterator();
}
// ---------------------------------------------- Methods from
Iterator
@Override
public boolean hasNext() {
if (outerIndex == -1) {
// pop our first List, if any;
outerIndex++;
inner = messages.get(keys.next()).iterator();
}
while (!inner.hasNext()) {
outerIndex++;
if (outerIndex < messagesSize) {
inner = messages.get(keys.next()).iterator();
} else {
return false;
}
}
return inner.hasNext();
}
@Override
public FacesMessage next() {
if (outerIndex >= messagesSize) {
throw new NoSuchElementException();
}
if (inner != null && inner.hasNext()) {
return inner.next();
} else {
// call this.hasNext() to properly initialize/position
'inner'
if (!hasNext()) {
throw new NoSuchElementException();
} else {
return inner.next();
}
}
}
@Override
public void remove() {
if (outerIndex == -1) {
throw new IllegalStateException();
}
inner.remove();
}
} // END ComponentMessagesIterator
```
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