- // Check if the output instance is valid
- if (is_null($this->outputInstance)) {
- // Debug output instance was not set
- throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
- } elseif (!is_object($this->outputInstance)) {
- // The debug output instance is not an object
- throw new NoObjectException($this->ouputInstance, self::EXCEPTION_IS_NO_OBJECT);
- } elseif (!method_exists($this->outputInstance, 'outputStream')) {
- // The required method outputStream() is missing
- throw new MissingMethodException(array($this->outputInstance, 'outputStream'), self::EXCEPTION_MISSING_METHOD);
- }
-