antville/helma
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overwrite hashCode to depend on prototype

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make prototype switchable for prototypes with same storage
This commit is contained in:
hns 2001-08-08 10:57:47 +00:00
parent 9d1b1d4d6f
commit 20af506b75
1 changed files with 29 additions and 0 deletions
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29
src/helma/objectmodel/db/Node.java
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@ -1418,6 +1418,23 @@ public final class Node implements INode, Serializable {
}
}
// check if the property we're setting specifies the prototype of this object.
if (dbmap != null && dbmap.getPrototypeField () != null) {
String pn = dbmap.columnNameToProperty (dbmap.getPrototypeField ());
if (propname.equals (pn)) {
DbMapping newmap = nmgr.getDbMapping (value);
if (newmap != null) {
// see if old and new prototypes have same storage - otherwise type change is ignored
String oldStorage = dbmap.getStorageTypeName ();
String newStorage = newmap.getStorageTypeName ();
if ((oldStorage == null && newStorage == null) ||
(oldStorage != null && oldStorage.equals (newStorage))) {
this.dbmap = newmap;
this.prototype = value;
}
}
}
}
// Server.throwNodeEvent (new NodeEvent (this, NodeEvent.PROPERTIES_CHANGED));
lastmodified = System.currentTimeMillis ();
@ -1786,6 +1803,18 @@ public final class Node implements INode, Serializable {
return nmgr == null;
}
/**
* We overwrite hashCode to make it dependant from the prototype. That way, when the prototype
* changes, the node will automatically get a new ESNode wrapper, since they're cached in a hashtable.
* You gotta love these hash code tricks ;-)
*/
public int hashCode () {
if (prototype == null)
return super.hashCode ();
else
return super.hashCode () + prototype.hashCode ();
}
public void dump () {
System.err.println ("subnodes: "+subnodes);
System.err.println ("properties: "+propMap);