autofetch builds different queryHashCodes between successive runs of your application.

1) avaje builds hash-codes using xyz.class.hashCode() which does NOT results into the same hashCode() between application starts. It seems the hashCode of a class is stable only within the same instance of a JVM.

I propose to fix this using xyz.class.getName().hashCode()

2) In SimpleExpression there is an enum which behaves like a class, thush hashCode() can't be called there too. proposal: enum.name().hashCode()

Here is a patch which solves that:

Index: ../ebean/src/com/avaje/ebean/expression/IdExpression.java
===================================================================
--- ../ebean/src/com/avaje/ebean/expression/IdExpression.java (revision 141)
+++ ../ebean/src/com/avaje/ebean/expression/IdExpression.java Sun Feb 22 11:37:22 CET 2009
@@ -42,7 +42,7 @@
public int queryPlanHash() {
// this number is unique for a given bean type
// which is all that is required
- return IdExpression.class.hashCode();
+ return IdExpression.class.getName().hashCode();
}

public int queryBindHash() {
Index: ../ebean/src/com/avaje/ebean/server/transaction/TableModInfo.java
===================================================================
--- ../ebean/src/com/avaje/ebean/server/transaction/TableModInfo.java (revision 141)
+++ ../ebean/src/com/avaje/ebean/server/transaction/TableModInfo.java Sun Feb 22 11:37:22 CET 2009
@@ -76,7 +76,7 @@
}

public int hashCode() {
- int hc = TableModInfo.class.hashCode();
+ int hc = TableModInfo.class.getName().hashCode();
hc = hc*31 + tableName.hashCode();
return hc;
}
Index: ../ebean/src/com/avaje/ebean/expression/LogicExpression.java
===================================================================
--- ../ebean/src/com/avaje/ebean/expression/LogicExpression.java (revision 141)
+++ ../ebean/src/com/avaje/ebean/expression/LogicExpression.java Sun Feb 22 11:37:22 CET 2009
@@ -61,7 +61,7 @@
* Based on the joinType plus the two expressions.
*/
public int queryPlanHash() {
- int hc = LogicExpression.class.hashCode() + joinType.hashCode();
+ int hc = LogicExpression.class.getName().hashCode() + joinType.hashCode();
hc = hc * 31 + expOne.queryPlanHash();
hc = hc * 31 + expTwo.queryPlanHash();
return hc;
Index: ../ebean/src/com/avaje/ebean/util/DefaultExpressionList.java
===================================================================
--- ../ebean/src/com/avaje/ebean/util/DefaultExpressionList.java (revision 141)
+++ ../ebean/src/com/avaje/ebean/util/DefaultExpressionList.java Sun Feb 22 11:37:22 CET 2009
@@ -1,11 +1,5 @@
package com.avaje.ebean.util;

-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
import com.avaje.ebean.Query;
import com.avaje.ebean.QueryListener;
import com.avaje.ebean.expression.Expr;
@@ -15,6 +9,12 @@
import com.avaje.ebean.expression.InternalExpressionList;
import com.avaje.ebean.expression.Junction;

+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
/**
* Default implementation of ExpressionList.
*/
@@ -125,7 +125,7 @@
* Calculate a hash based on the expressions but excluding the actual bind values.
*/
public int queryPlanHash() {
- int hash = DefaultExpressionList.class.hashCode();
+ int hash = DefaultExpressionList.class.getName().hashCode();
for (int i = 0, size=list.size(); i < size; i++) {
Expression expression = list.get(i);
hash = hash*31 + expression.queryPlanHash();
@@ -137,7 +137,7 @@
* Calculate a hash based on the expressions.
*/
public int queryBindHash() {
- int hash = DefaultExpressionList.class.hashCode();
+ int hash = DefaultExpressionList.class.getName().hashCode();
for (int i = 0, size=list.size(); i < size; i++) {
Expression expression = list.get(i);
hash = hash*31 + expression.queryBindHash();
Index: ../ebean/src/com/avaje/ebean/server/net/Endpoint.java
===================================================================
--- ../ebean/src/com/avaje/ebean/server/net/Endpoint.java (revision 141)
+++ ../ebean/src/com/avaje/ebean/server/net/Endpoint.java Sun Feb 22 11:37:22 CET 2009
@@ -81,7 +81,7 @@
}

public int hashCode() {
- int hc = Endpoint.class.hashCode();
+ int hc = Endpoint.class.getName().hashCode();
hc = 31*hc + fullName.hashCode();
return hc;
}
Index: ../ebean/src/com/avaje/ebean/expression/AllEqualsExpression.java
===================================================================
--- ../ebean/src/com/avaje/ebean/expression/AllEqualsExpression.java (revision 141)
+++ ../ebean/src/com/avaje/ebean/expression/AllEqualsExpression.java Sun Feb 22 11:37:22 CET 2009
@@ -74,7 +74,7 @@
*