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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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53
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 * Get the node described by this node handle
*/ */
public Node getNode (WrappedNodeManager nodemgr) { public Node getNode (WrappedNodeManager nodemgr) {
if (node != null) { if (node != null)
int state = node.getState (); return node;
if (state == TRANSIENT)
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); return nodemgr.getNode (key);
} }
@ -91,23 +81,11 @@ public final class NodeHandle implements INodeState, Serializable {
return key.getID (); 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 () { private Object getObject () {
if (node != null) { if (node != null)
if (node.getState () != TRANSIENT)
return node.getKey ();
return node; return node;
} else
return key; return key;
} }
public boolean equals (Object other) { public boolean equals (Object other) {
@ -118,14 +96,23 @@ 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 != null) {
if (node.getState () == TRANSIENT) key = node.getKey ();
return "NodeHandle[transient:"+node+"]"; node = null;
else
key = node.getKey ();
} }
return "NodeHandle["+key+"]"; }
public String toString () {
if (node != null)
return "NodeHandle[transient:"+node+"]";
else
return "NodeHandle["+key+"]";
} }
} }