Make Packager restore item mappings to non-owning Collections

git-svn-id: http://scm.dspace.org/svn/repo/dspace/trunk@5397 9c30dcfa-912a-0410-8fc2-9e0234be79fd

dspace-api/src/main/java/org/dspace/content/Item.java

@@ -1034,6 +1034,22 @@ public class Item extends DSpaceObject
         modified = true;
     }
 
+    /**
+     * See whether this Item is contained by a given Collection.
+     * @param collection
+     * @return true if {@code collection} contains this Item.
+     * @throws SQLException
+     */
+    public boolean isIn(Collection collection) throws SQLException
+    {
+        TableRow tr = DatabaseManager.querySingle(ourContext,
+                "SELECT COUNT(*) AS count" +
+                " FROM collection2item" +
+                " WHERE collection_id = ? AND item_id = ?",
+                collection.getID(), itemRow.getIntColumn("item_id"));
+        return tr.getLongColumn("count") > 0;
+    }
+
     /**
      * Get the collections this item is in. The order is indeterminate.
      *