Fix for ALF-786: WCM Cluster / Lucene: Searching in staging returns duplicate entries (when concurrently submtting)

- fixed duplication arising from indexing 0-1 and 0-2 against the index for near simultaneous snapshots 
- tracking has not been modified nor has index rebuild - the latest index info from the AVM index is definitive and complete - we do not have to do additional work as we do for DM

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@19898 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/AVMRepository.java

@@ -3428,4 +3428,50 @@ public class AVMRepository
         }
         return store.getStoreAcl();
     }
+
+    /**
+     * @param name
+     * @param version
+     * @return
+     */
+    public List<VersionDescriptor> getAVMStoreVersionsTo(String name, int version)
+    {
+        AVMStore store = getAVMStoreByName(name);
+        if (store == null)
+        {
+            throw new AVMNotFoundException("Store not found.");
+        }
+        return store.getVersionsTo(version);
+    }
+
+    /**
+     * @param name
+     * @param version
+     * @return
+     */
+    public List<VersionDescriptor> getAVMStoreVersionsFrom(String name, int version)
+    {
+        AVMStore store = getAVMStoreByName(name);
+        if (store == null)
+        {
+            throw new AVMNotFoundException("Store not found.");
+        }
+        return store.getVersionsFrom(version);
+    }
+
+    /**
+     * @param name
+     * @param startVersion
+     * @param endVersion
+     * @return
+     */
+    public List<VersionDescriptor> getAVMStoreVersionsBetween(String name, int startVersion, int endVersion)
+    {
+        AVMStore store = getAVMStoreByName(name);
+        if (store == null)
+        {
+            throw new AVMNotFoundException("Store not found.");
+        }
+        return store.getVersionsBetween(startVersion, endVersion);
+    }
 }