From 20af506b7560432abc14e7daf08813d893240da9 Mon Sep 17 00:00:00 2001
From: hns <hannesw@gmail.com>
Date: Wed, 8 Aug 2001 10:57:47 +0000
Subject: [PATCH] overwrite hashCode to depend on prototype make prototype
 switchable for prototypes with same storage

---
 src/helma/objectmodel/db/Node.java | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/helma/objectmodel/db/Node.java b/src/helma/objectmodel/db/Node.java
index 55020622..811558e9 100644
--- a/src/helma/objectmodel/db/Node.java
+++ b/src/helma/objectmodel/db/Node.java
@@ -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);