/**
 * Describe Image Attribute Action Sample
 * The DescribeImageAttribute operation returns information about an attribute of
 * an AMI. Only one attribute can be specified per call.
 *   
 * @param Amazon_EC2_Interface $service instance of Amazon_EC2_Interface
 * @param mixed $request Amazon_EC2_Model_DescribeImageAttribute or array of parameters
 */
function invokeDescribeImageAttribute(Amazon_EC2_Interface $service, $request)
{
    try {
        $response = $service->describeImageAttribute($request);
        echo "Service Response\n";
        echo "=============================================================================\n";
        echo "        DescribeImageAttributeResponse\n";
        if ($response->isSetResponseMetadata()) {
            echo "            ResponseMetadata\n";
            $responseMetadata = $response->getResponseMetadata();
            if ($responseMetadata->isSetRequestId()) {
                echo "                RequestId\n";
                echo "                    " . $responseMetadata->getRequestId() . "\n";
            }
        }
        if ($response->isSetDescribeImageAttributeResult()) {
            echo "            DescribeImageAttributeResult\n";
            $describeImageAttributeResult = $response->getDescribeImageAttributeResult();
            $imageAttributeList = $describeImageAttributeResult->getImageAttribute();
            foreach ($imageAttributeList as $imageAttribute) {
                echo "                ImageAttribute\n";
                if ($imageAttribute->isSetImageId()) {
                    echo "                    ImageId\n";
                    echo "                        " . $imageAttribute->getImageId() . "\n";
                }
                $launchPermissionList = $imageAttribute->getLaunchPermission();
                foreach ($launchPermissionList as $launchPermission) {
                    echo "                    LaunchPermission\n";
                    if ($launchPermission->isSetUserId()) {
                        echo "                        UserId\n";
                        echo "                            " . $launchPermission->getUserId() . "\n";
                    }
                    if ($launchPermission->isSetGroupName()) {
                        echo "                        GroupName\n";
                        echo "                            " . $launchPermission->getGroupName() . "\n";
                    }
                }
                $productCodeList = $imageAttribute->getProductCode();
                foreach ($productCodeList as $productCode) {
                    echo "                    ProductCode\n";
                    echo "                        " . $productCode;
                }
                if ($imageAttribute->isSetKernelId()) {
                    echo "                    KernelId\n";
                    echo "                        " . $imageAttribute->getKernelId() . "\n";
                }
                if ($imageAttribute->isSetRamdiskId()) {
                    echo "                    RamdiskId\n";
                    echo "                        " . $imageAttribute->getRamdiskId() . "\n";
                }
                if ($imageAttribute->isSetBlockDeviceMapping()) {
                    echo "                    BlockDeviceMapping\n";
                    $blockDeviceMapping = $imageAttribute->getBlockDeviceMapping();
                    if ($blockDeviceMapping->isSetVirtualName()) {
                        echo "                        VirtualName\n";
                        echo "                            " . $blockDeviceMapping->getVirtualName() . "\n";
                    }
                    if ($blockDeviceMapping->isSetDeviceName()) {
                        echo "                        DeviceName\n";
                        echo "                            " . $blockDeviceMapping->getDeviceName() . "\n";
                    }
                }
            }
        }
    } catch (Amazon_EC2_Exception $ex) {
        echo "Caught Exception: " . $ex->getMessage() . "\n";
        echo "Response Status Code: " . $ex->getStatusCode() . "\n";
        echo "Error Code: " . $ex->getErrorCode() . "\n";
        echo "Error Type: " . $ex->getErrorType() . "\n";
        echo "Request ID: " . $ex->getRequestId() . "\n";
        echo "XML: " . $ex->getXML() . "\n";
    }
}