Lisheng Sun created HADOOP-16671:
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Summary: Optimize InnerNodeImpl#getLeaf
Key: HADOOP-16671
URL: https://issues.apache.org/jira/browse/HADOOP-16671
Project: Hadoop Common
Issue Type: Improvement
Reporter: Lisheng Sun
{code:java}
@Override
public Node getLeaf(int leafIndex, Node excludedNode) {
int count=0;
// check if the excluded node a leaf
boolean isLeaf = !(excludedNode instanceof InnerNode);
// calculate the total number of excluded leaf nodes
int numOfExcludedLeaves =
isLeaf ? 1 : ((InnerNode)excludedNode).getNumOfLeaves();
if (isLeafParent()) { // children are leaves
if (isLeaf) { // excluded node is a leaf node
if (excludedNode != null &&
childrenMap.containsKey(excludedNode.getName())) {
int excludedIndex = children.indexOf(excludedNode);
if (excludedIndex != -1 && leafIndex >= 0) {
// excluded node is one of the children so adjust the leaf index
leafIndex = leafIndex>=excludedIndex ? leafIndex+1 : leafIndex;
}
}
}
// range check
if (leafIndex<0 || leafIndex>=this.getNumOfChildren()) {
return null;
}
return children.get(leafIndex);
} else {
{code}
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