private Sorter createSorter() {
final List<ItemPoolSorter<InventoryItem>> oneColSorters =
new ArrayList<ItemPoolSorter<InventoryItem>>(maxSortDepth);
for (final ItemColumn col : this.colsToSort) {
oneColSorters.add(
new ItemPoolSorter<InventoryItem>(
col.getFnSort(),
col.getConfig().getSortState().equals(SortState.ASC) ? true : false));
}
return new Sorter(oneColSorters);
}
// Adds a column to sort cascade list.
// If column is first in the cascade, inverts direction of sort.
// Otherwise, sorts in ascending direction.
public void add(final ItemColumn col0, final boolean forSetup) {
this.sorter = null;
if (forSetup) { // just add column unmodified if setting up sort columns
this.colsToSort.add(0, col0);
} else {
if (colsToSort.size() > 0
&& colsToSort.get(0).equals(col0)) { // if column already at top level, just invert
col0.getConfig().setSortPriority(1);
col0.getConfig()
.setSortState(
col0.getConfig().getSortState() == SortState.ASC
? SortState.DESC
: SortState.ASC);
} else { // otherwise move column to top level and move others down
this.colsToSort.remove(col0);
col0.getConfig().setSortPriority(1);
col0.getConfig().setSortState(col0.getConfig().getDefaultSortState());
this.colsToSort.add(0, col0);
}
// decrement sort priority on remaining columns
for (int i = 1; i < maxSortDepth; i++) {
if (colsToSort.size() == i) {
break;
}
if (colsToSort.get(i).getConfig().getSortPriority() != 0) {
colsToSort.get(i).getConfig().setSortPriority(i + 1);
}
}
}
// unset and remove boundary columns.
if (this.colsToSort.size() > maxSortDepth) {
this.colsToSort.get(maxSortDepth).getConfig().setSortPriority(0);
this.colsToSort.remove(maxSortDepth);
}
}