Ldap/Query: Remove __toString()

This is needed because of exception handling. Exceptions can now bubble
up for default handling. Method render() was renamed to create() because
the method create a query. Adjust the test for method create().

refs #5536

library/Icinga/Protocol/Ldap/Connection.php

@@ -307,7 +307,7 @@ class Connection
         $results = @ldap_search(
             $this->ds,
             $base,
-            (string) $query,
+            $query->create(),
             $fields,
             0, // Attributes and values
             0  // No limit - at least where possible
@@ -619,7 +619,7 @@ class Connection
         $result = @ldap_read(
             $ds,
             '',
-            (string) $query,
+            $query->create(),
             $query->listFields()
         );
 

library/Icinga/Protocol/Ldap/Query.php

@@ -300,17 +300,7 @@ class Query
      *
      * @string
      */
-    public function __toString()
-    {
-        return $this->render();
-    }
-
-    /**
-     * Returns the LDAP filter that will be applied
-     *
-     * @string
-     */
-    protected function render()
+    public function create()
     {
         $parts = array();
         if (! isset($this->filters['objectClass']) || $this->filters['objectClass'] === null) {

test/php/library/Icinga/Protocol/Ldap/QueryTest.php

@@ -109,10 +109,10 @@ class QueryTest extends BaseTestCase
         $this->assertEquals('testIntColumn', $cols[0][0]);
     }
 
-    public function test__toString()
+    public function testCreateQuery()
     {
         $select = $this->prepareSelect();
         $res = '(&(objectClass=dummyClass)(testIntColumn=1)(testStringColumn=test)(testWildcard=abc*))';
-        $this->assertEquals($res, (string) $select);
+        $this->assertEquals($res, $select->create());
     }
 }