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A more scalable implementation of getCommonAncestor. Performance is roughly proportional

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to the distance of the common ancestor from the compared nodes.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@4265 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
This commit is contained in:
Britt Park
2006-10-31 15:17:09 +00:00
parent 3ad75520ca
commit 267e4d06b0
1 changed files with 33 additions and 14 deletions
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47
source/java/org/alfresco/repo/avm/AVMRepository.java
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@@ -1709,24 +1709,43 @@ public class AVMRepository
throw new AVMNotFoundException("Node not found."); throw new AVMNotFoundException("Node not found.");
} }
List<AVMNode> leftHistory = new ArrayList<AVMNode>(); List<AVMNode> leftHistory = new ArrayList<AVMNode>();
while (lNode != null)
{
leftHistory.add(lNode);
lNode = lNode.getAncestor();
}
List<AVMNode> rightHistory = new ArrayList<AVMNode>(); List<AVMNode> rightHistory = new ArrayList<AVMNode>();
while (rNode != null) while (lNode != null || rNode != null)
{ {
rightHistory.add(rNode); boolean checkRight = false;
rNode = rNode.getAncestor(); if (lNode != null)
}
for (AVMNode l : leftHistory)
{
for (AVMNode r : rightHistory)
{ {
if (l.equals(r)) leftHistory.add(lNode);
checkRight = true;
lNode = lNode.getAncestor();
}
boolean checkLeft = false;
if (rNode != null)
{
rightHistory.add(rNode);
checkLeft = true;
rNode = rNode.getAncestor();
}
if (checkRight)
{
AVMNode check = leftHistory.get(leftHistory.size() - 1);
for (AVMNode node : rightHistory)
{ {
return l.getDescriptor("", "", ""); if (node.equals(check))
{
return node.getDescriptor("", "", "");
}
}
}
if (checkLeft)
{
AVMNode check = rightHistory.get(rightHistory.size() - 1);
for (AVMNode node : leftHistory)
{
if (node.equals(check))
{
return node.getDescriptor("", "", "");
}
} }
} }
} }