1 files changed, 20 insertions, 0 deletions
diff --git a/plugins/org.eclipse.emf.cdo.server.hibernate/src/org/eclipse/emf/cdo/server/internal/hibernate/tuplizer/WrappedHibernateList.java b/plugins/org.eclipse.emf.cdo.server.hibernate/src/org/eclipse/emf/cdo/server/internal/hibernate/tuplizer/WrappedHibernateList.java
index 389ddece8d..a4f0625986 100644
--- a/plugins/org.eclipse.emf.cdo.server.hibernate/src/org/eclipse/emf/cdo/server/internal/hibernate/tuplizer/WrappedHibernateList.java
+++ b/plugins/org.eclipse.emf.cdo.server.hibernate/src/org/eclipse/emf/cdo/server/internal/hibernate/tuplizer/WrappedHibernateList.java
@@ -43,6 +43,8 @@ public class WrappedHibernateList implements InternalCDOList
 {
   private List<Object> delegate;
 
+  private boolean frozen;
+
   public WrappedHibernateList()
   {
   }
@@ -463,4 +465,22 @@ public class WrappedHibernateList implements InternalCDOList
       delegate.set(HibernateUtil.getInstance().getCDOID(o));
     }
   }
+
+  public void freeze()
+  {
+    frozen = true;
+  }
+
+  private void checkFrozen()
+  {
+    if (frozen)
+    {
+      throw new IllegalStateException("Cannot modify a frozen list");
+    }
+  }
+
+  public void setWithoutFrozenCheck(int i, Object value)
+  {
+    getDelegate().set(i, value);
+  }
 }