/**
* call {@link Esi4JEntityResolver#replaceEntity(Object)} for each task. At the same time, we
* create a map of {@link ObjectKey}s.
*/
private ListMap<ObjectKey, Integer> replaceEntities(final Esi4JEntityTask[] tasks) {
final ListMap<ObjectKey, Integer> map = new ObjectKeyListMap(tasks.length);
for (int i = 0; i < tasks.length; i++) {
final Esi4JEntityTask task = tasks[i];
if (task != null) {
task.replaceEntity(_entityResolver);
map.add(task.toObjectKey(_entityResolver), i);
}
}
return map;
}
/**
* reduce number of operations by replacing duplicates. If a task isn't an update, we ignore
* everything before it.
*/
static void resolveDuplicates(
final Esi4JEntityTask[] tasks, final ListMap<ObjectKey, Integer> map) {
for (final Map.Entry<ObjectKey, List<Integer>> e : map.entrySet()) {
final List<Integer> taskIndices = e.getValue();
if (taskIndices.size() > 1) {
// resolving duplicates
final ListIterator<Integer> iter = taskIndices.listIterator(taskIndices.size());
boolean overwritePrevious = false;
while (iter.hasPrevious()) {
final int taskIndex = iter.previous();
if (overwritePrevious) {
tasks[taskIndex] = null;
iter.remove();
} else if (!tasks[taskIndex].isUpdate()) {
overwritePrevious = true;
}
}
}
}
}