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allows null key key for the root node

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This commit is contained in:
Sergey Malenkov
2016-12-27 11:36:19 +03:00
parent 54eb6ce6af
commit 8508e2cc5f
1 changed files with 8 additions and 10 deletions
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platform/platform-impl/src/com/intellij/ui/tree/MapBasedTree.java
+8 -10
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@@ -79,17 +79,15 @@ public final class MapBasedTree<K, N> {
public boolean updateRoot(N node) {
if (node == (root == null ? null : root.node)) return false;
K key = getKey(node);
Entry<N> entry = null;
if (key != null) {
entry = new Entry<>(null, node);
}
else if (root == null) {
return false;
}
root = entry;
map.clear();
if (key != null) map.put(key, entry);
if (node == null) {
root = null;
}
else {
root = new Entry<>(null, node);
K key = keyFunction.apply(node);
if (key != null) map.put(key, root);
}
return true;
}