Example #1
0
 /**
  * Build comparison function for this leaf node. 
  *
  * @param array(string) $ancestors Array of parent properties e.g. 
  *                                 array('Orders', 'Customer', 
  *                                'Customer_Demographics')
  *
  * @return AnonymousFunction
  */
 public function buildComparisonFunction($ancestors)
 {
     if (count($ancestors) == 0) {
         throw new \InvalidArgumentException(Messages::orderByLeafNodeArgumentShouldBeNonEmptyArray());
     }
     $parameterNames = null;
     $accessor1 = null;
     $accessor2 = null;
     $a = $this->_isAscending ? 1 : -1;
     foreach ($ancestors as $i => $anscestor) {
         if ($i == 0) {
             $parameterNames = array('$' . $anscestor . 'A', '$' . $anscestor . 'B');
             $accessor1 = $parameterNames[0];
             $accessor2 = $parameterNames[1];
             $flag1 = '$flag1 = ' . 'is_null(' . $accessor1 . ') || ';
             $flag2 = '$flag2 = ' . 'is_null(' . $accessor2 . ') || ';
         } else {
             $accessor1 .= '->' . $anscestor;
             $accessor2 .= '->' . $anscestor;
             $flag1 .= 'is_null(' . $accessor1 . ')' . ' || ';
             $flag2 .= 'is_null(' . $accessor2 . ')' . ' || ';
         }
     }
     $accessor1 .= '->' . $this->propertyName;
     $accessor2 .= '->' . $this->propertyName;
     $flag1 .= 'is_null(' . $accessor1 . ')';
     $flag2 .= 'is_null(' . $accessor2 . ')';
     $code = "{$flag1}; \n             {$flag2}; \n             if(\$flag1 && \$flag2) { \n               return 0;\n             } else if (\$flag1) { \n                 return {$a}*-1;\n             } else if (\$flag2) { \n                 return {$a}*1;\n             }\n             \n            ";
     $type = $this->resourceProperty->getInstanceType();
     if ($type instanceof DateTime) {
         $code .= " \$result = strtotime({$accessor1}) - strtotime({$accessor2});";
     } else {
         if ($type instanceof String) {
             $code .= " \$result = strcmp({$accessor1}, {$accessor2});";
         } else {
             if ($type instanceof Guid) {
                 $code .= " \$result = strcmp({$accessor1}, {$accessor2});";
             } else {
                 $code .= " \$result = (({$accessor1} == {$accessor2}) ? 0 : (({$accessor1} > {$accessor2}) ? 1 : -1));";
             }
         }
     }
     $code .= "\n             return {$a}*\$result;";
     $this->_anonymousFunction = new AnonymousFunction($parameterNames, $code);
     return $this->_anonymousFunction;
 }