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NodeHandle is now notified when its Node switches

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from transient to persistent state so it doesn't have
to  check itself each time the node is accessed.
This commit is contained in:
hns 2001-08-05 19:29:55 +00:00
parent 0332e4c430
commit a22bde81ad
1 changed files with 20 additions and 33 deletions
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45
src/helma/objectmodel/db/NodeHandle.java
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@ -58,18 +58,8 @@ public final class NodeHandle implements INodeState, Serializable {
* Get the node described by this node handle
*/
public Node getNode (WrappedNodeManager nodemgr) {
if (node != null) {
int state = node.getState ();
if (state == TRANSIENT)
if (node != null)
return node;
else {
// this node went from TRANSIENT to some other state.
// It's time to say goodby to the direct reference, from now on
// we'll have to fetch let the node manager fetch it.
key = node.getKey ();
node = null;
}
}
return nodemgr.getNode (key);
}
@ -91,22 +81,10 @@ public final class NodeHandle implements INodeState, Serializable {
return key.getID ();
}
public DbMapping getDbMapping (WrappedNodeManager nmgr) {
if (dbmap == null) {
if (node != null)
dbmap = node.getDbMapping ();
else
dbmap = nmgr.getDbMapping (key.getStorageName ());
}
return dbmap;
}
private Object getObject () {
if (node != null) {
if (node.getState () != TRANSIENT)
return node.getKey ();
if (node != null)
return node;
}
else
return key;
}
@ -118,13 +96,22 @@ public final class NodeHandle implements INodeState, Serializable {
}
}
public String toString () {
/**
* This is to notify the handle that the underlying node is becoming
* persistent and we have to refer to it via the key from now on.
*/
protected void becomePersistent () {
if (node != null) {
if (node.getState () == TRANSIENT)
key = node.getKey ();
node = null;
}
}
public String toString () {
if (node != null)
return "NodeHandle[transient:"+node+"]";
else
key = node.getKey ();
}
return "NodeHandle["+key+"]";
}