public function getInputFilter()
    {
        if (!$this->inputFilter) {
            $inputFilter = new InputFilter();

            $factory = new InputFactory();

            $inputFilter->add($factory->createInput(array(
                'name'       => 'id',
                'required'   => true,
                'filters' => array(
                    array('name'    => 'Int'),
                ),
            )));

            $inputFilter->add($factory->createInput(array(
                'name'     => 'agencyName',
                'required' => true,
                'filters'  => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
                'validators' => array(
                    array(
                        'name'    => 'StringLength',
                        'options' => array(
                            'encoding' => 'UTF-8',
                            'min'      => 1,
                            'max'      => 100,
                        ),
                    ),
                ),
            )));

            $inputFilter->add($factory->createInput(array(
                'name'      => 'applicationUrl',
                'required'  => true,
                'filters'   => array(
                    array('name' => 'StripTags'),
                    array('name' => 'StringTrim'),
                ),
                'validators' => array(
                    array(
                        'name'    => 'StringLength',
                        'options' => array(
                            'encoding' => 'UTF-8',
                            'min'      => 1,
                            'max'      => 200,
                        ),
                    ),
                ),
            )));

            $inputFilter->add($factory->createInput(array(
                'type'      => 'Zend\InputFilter\FileInput',
                'name'      => 'logoName',
                'required'  => true,
                'validators' => array(
                    array(
                        'name'      => 'File\MimeType',
                        'options'   => array(
                            'mimeType' => 'image/png'
                        )
                    )
                )
            )));

            $inputFilter->add($factory->createInput(array(
                'type'      => 'Zend\InputFilter\FileInput',
                'name'      => 'cssFilename',
                'required'  => true,
                'validators' => array(
                        array(
                            'name'      => 'File\MimeType',
                            'options'   => array(
                                'mimeType' => 'text'
                            )
                        )
                    )
            )));

            $this->inputFilter = $inputFilter;
        }

        return $this->inputFilter;
    }