/**
* Remove the node if possible or set its count to 0 if it has children and it needs to be kept
* around
*/
private Node tryRemove(Node node) {
if (node == null) {
return null;
}
if (node.weightedCount >= ZERO_WEIGHT_THRESHOLD) {
--nonZeroNodeCount;
}
weightedCount -= node.weightedCount;
Node result = null;
if (node.isLeaf()) {
--totalNodeCount;
} else if (node.hasSingleChild()) {
result = node.getSingleChild();
--totalNodeCount;
} else {
node.weightedCount = 0;
result = node;
}
return result;
}
