SimpleQuery: Add method hasResult()

refs #9632

library/Icinga/Data/SimpleQuery.php

@@ -422,6 +422,16 @@ class SimpleQuery implements QueryInterface, Queryable, Iterator
         return $this->hasMore;
     }
 
+    /**
+     * Return whether this query will or has yielded any result
+     *
+     * @return  bool
+     */
+    public function hasResult()
+    {
+        return $this->iteratorPosition !== null || $this->fetchRow() !== false;
+    }
+
     /**
      * Set a limit count and offset to the query
      *

library/Icinga/Repository/RepositoryQuery.php

@@ -367,6 +367,16 @@ class RepositoryQuery implements QueryInterface, SortRules, Iterator
         return $this->query->hasMore();
     }
 
+    /**
+     * Return whether this query will or has yielded any result
+     *
+     * @return  bool
+     */
+    public function hasResult()
+    {
+        return $this->query->hasResult();
+    }
+
     /**
      * Limit this query's results
      *

modules/monitoring/library/Monitoring/DataView/DataView.php

@@ -433,6 +433,16 @@ abstract class DataView implements QueryInterface, SortRules, IteratorAggregate
         return $this->query->hasMore();
     }
 
+    /**
+     * Return whether this query will or has yielded any result
+     *
+     * @return  bool
+     */
+    public function hasResult()
+    {
+        return $this->query->hasResult();
+    }
+
     /**
      * Set a limit count and offset
      *