aws_sdk_codeartifact/operation/
list_package_versions.rs

1// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
2/// Orchestration and serialization glue logic for `ListPackageVersions`.
3#[derive(::std::clone::Clone, ::std::default::Default, ::std::fmt::Debug)]
4#[non_exhaustive]
5pub struct ListPackageVersions;
6impl ListPackageVersions {
7    /// Creates a new `ListPackageVersions`
8    pub fn new() -> Self {
9        Self
10    }
11    pub(crate) async fn orchestrate(
12        runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
13        input: crate::operation::list_package_versions::ListPackageVersionsInput,
14    ) -> ::std::result::Result<
15        crate::operation::list_package_versions::ListPackageVersionsOutput,
16        ::aws_smithy_runtime_api::client::result::SdkError<
17            crate::operation::list_package_versions::ListPackageVersionsError,
18            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
19        >,
20    > {
21        let map_err = |err: ::aws_smithy_runtime_api::client::result::SdkError<
22            ::aws_smithy_runtime_api::client::interceptors::context::Error,
23            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
24        >| {
25            err.map_service_error(|err| {
26                err.downcast::<crate::operation::list_package_versions::ListPackageVersionsError>()
27                    .expect("correct error type")
28            })
29        };
30        let context = Self::orchestrate_with_stop_point(runtime_plugins, input, ::aws_smithy_runtime::client::orchestrator::StopPoint::None)
31            .await
32            .map_err(map_err)?;
33        let output = context.finalize().map_err(map_err)?;
34        ::std::result::Result::Ok(
35            output
36                .downcast::<crate::operation::list_package_versions::ListPackageVersionsOutput>()
37                .expect("correct output type"),
38        )
39    }
40
41    pub(crate) async fn orchestrate_with_stop_point(
42        runtime_plugins: &::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
43        input: crate::operation::list_package_versions::ListPackageVersionsInput,
44        stop_point: ::aws_smithy_runtime::client::orchestrator::StopPoint,
45    ) -> ::std::result::Result<
46        ::aws_smithy_runtime_api::client::interceptors::context::InterceptorContext,
47        ::aws_smithy_runtime_api::client::result::SdkError<
48            ::aws_smithy_runtime_api::client::interceptors::context::Error,
49            ::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
50        >,
51    > {
52        let input = ::aws_smithy_runtime_api::client::interceptors::context::Input::erase(input);
53        ::aws_smithy_runtime::client::orchestrator::invoke_with_stop_point("codeartifact", "ListPackageVersions", input, runtime_plugins, stop_point)
54            .await
55    }
56
57    pub(crate) fn operation_runtime_plugins(
58        client_runtime_plugins: ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins,
59        client_config: &crate::config::Config,
60        config_override: ::std::option::Option<crate::config::Builder>,
61    ) -> ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugins {
62        let mut runtime_plugins = client_runtime_plugins.with_operation_plugin(Self::new());
63        runtime_plugins = runtime_plugins.with_client_plugin(crate::auth_plugin::DefaultAuthOptionsPlugin::new(vec![
64            ::aws_runtime::auth::sigv4::SCHEME_ID,
65        ]));
66        if let ::std::option::Option::Some(config_override) = config_override {
67            for plugin in config_override.runtime_plugins.iter().cloned() {
68                runtime_plugins = runtime_plugins.with_operation_plugin(plugin);
69            }
70            runtime_plugins = runtime_plugins.with_operation_plugin(crate::config::ConfigOverrideRuntimePlugin::new(
71                config_override,
72                client_config.config.clone(),
73                &client_config.runtime_components,
74            ));
75        }
76        runtime_plugins
77    }
78}
79impl ::aws_smithy_runtime_api::client::runtime_plugin::RuntimePlugin for ListPackageVersions {
80    fn config(&self) -> ::std::option::Option<::aws_smithy_types::config_bag::FrozenLayer> {
81        let mut cfg = ::aws_smithy_types::config_bag::Layer::new("ListPackageVersions");
82
83        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedRequestSerializer::new(
84            ListPackageVersionsRequestSerializer,
85        ));
86        cfg.store_put(::aws_smithy_runtime_api::client::ser_de::SharedResponseDeserializer::new(
87            ListPackageVersionsResponseDeserializer,
88        ));
89
90        cfg.store_put(::aws_smithy_runtime_api::client::auth::AuthSchemeOptionResolverParams::new(
91            ::aws_smithy_runtime_api::client::auth::static_resolver::StaticAuthSchemeOptionResolverParams::new(),
92        ));
93
94        cfg.store_put(::aws_smithy_runtime_api::client::orchestrator::Metadata::new(
95            "ListPackageVersions",
96            "codeartifact",
97        ));
98        let mut signing_options = ::aws_runtime::auth::SigningOptions::default();
99        signing_options.double_uri_encode = true;
100        signing_options.content_sha256_header = false;
101        signing_options.normalize_uri_path = true;
102        signing_options.payload_override = None;
103
104        cfg.store_put(::aws_runtime::auth::SigV4OperationSigningConfig {
105            signing_options,
106            ..::std::default::Default::default()
107        });
108
109        ::std::option::Option::Some(cfg.freeze())
110    }
111
112    fn runtime_components(
113        &self,
114        _: &::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder,
115    ) -> ::std::borrow::Cow<'_, ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder> {
116        #[allow(unused_mut)]
117        let mut rcb = ::aws_smithy_runtime_api::client::runtime_components::RuntimeComponentsBuilder::new("ListPackageVersions")
118            .with_interceptor(::aws_smithy_runtime::client::stalled_stream_protection::StalledStreamProtectionInterceptor::default())
119            .with_interceptor(ListPackageVersionsEndpointParamsInterceptor)
120            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::TransientErrorClassifier::<
121                crate::operation::list_package_versions::ListPackageVersionsError,
122            >::new())
123            .with_retry_classifier(::aws_smithy_runtime::client::retries::classifiers::ModeledAsRetryableClassifier::<
124                crate::operation::list_package_versions::ListPackageVersionsError,
125            >::new())
126            .with_retry_classifier(::aws_runtime::retries::classifiers::AwsErrorCodeClassifier::<
127                crate::operation::list_package_versions::ListPackageVersionsError,
128            >::new());
129
130        ::std::borrow::Cow::Owned(rcb)
131    }
132}
133
134#[derive(Debug)]
135struct ListPackageVersionsResponseDeserializer;
136impl ::aws_smithy_runtime_api::client::ser_de::DeserializeResponse for ListPackageVersionsResponseDeserializer {
137    fn deserialize_nonstreaming(
138        &self,
139        response: &::aws_smithy_runtime_api::client::orchestrator::HttpResponse,
140    ) -> ::aws_smithy_runtime_api::client::interceptors::context::OutputOrError {
141        let (success, status) = (response.status().is_success(), response.status().as_u16());
142        let headers = response.headers();
143        let body = response.body().bytes().expect("body loaded");
144        #[allow(unused_mut)]
145        let mut force_error = false;
146        ::tracing::debug!(request_id = ?::aws_types::request_id::RequestId::request_id(response));
147        let parse_result = if !success && status != 200 || force_error {
148            crate::protocol_serde::shape_list_package_versions::de_list_package_versions_http_error(status, headers, body)
149        } else {
150            crate::protocol_serde::shape_list_package_versions::de_list_package_versions_http_response(status, headers, body)
151        };
152        crate::protocol_serde::type_erase_result(parse_result)
153    }
154}
155#[derive(Debug)]
156struct ListPackageVersionsRequestSerializer;
157impl ::aws_smithy_runtime_api::client::ser_de::SerializeRequest for ListPackageVersionsRequestSerializer {
158    #[allow(unused_mut, clippy::let_and_return, clippy::needless_borrow, clippy::useless_conversion)]
159    fn serialize_input(
160        &self,
161        input: ::aws_smithy_runtime_api::client::interceptors::context::Input,
162        _cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
163    ) -> ::std::result::Result<::aws_smithy_runtime_api::client::orchestrator::HttpRequest, ::aws_smithy_runtime_api::box_error::BoxError> {
164        let input = input
165            .downcast::<crate::operation::list_package_versions::ListPackageVersionsInput>()
166            .expect("correct type");
167        let _header_serialization_settings = _cfg
168            .load::<crate::serialization_settings::HeaderSerializationSettings>()
169            .cloned()
170            .unwrap_or_default();
171        let mut request_builder = {
172            fn uri_base(
173                _input: &crate::operation::list_package_versions::ListPackageVersionsInput,
174                output: &mut ::std::string::String,
175            ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
176                use ::std::fmt::Write as _;
177                ::std::write!(output, "/v1/package/versions").expect("formatting should succeed");
178                ::std::result::Result::Ok(())
179            }
180            fn uri_query(
181                _input: &crate::operation::list_package_versions::ListPackageVersionsInput,
182                mut output: &mut ::std::string::String,
183            ) -> ::std::result::Result<(), ::aws_smithy_types::error::operation::BuildError> {
184                let mut query = ::aws_smithy_http::query::Writer::new(output);
185                let inner_1 = &_input.domain;
186                let inner_1 = inner_1
187                    .as_ref()
188                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("domain", "cannot be empty or unset"))?;
189                if inner_1.is_empty() {
190                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
191                        "domain",
192                        "cannot be empty or unset",
193                    ));
194                }
195                query.push_kv("domain", &::aws_smithy_http::query::fmt_string(inner_1));
196                if let ::std::option::Option::Some(inner_2) = &_input.domain_owner {
197                    {
198                        query.push_kv("domain-owner", &::aws_smithy_http::query::fmt_string(inner_2));
199                    }
200                }
201                let inner_3 = &_input.repository;
202                let inner_3 = inner_3
203                    .as_ref()
204                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("repository", "cannot be empty or unset"))?;
205                if inner_3.is_empty() {
206                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
207                        "repository",
208                        "cannot be empty or unset",
209                    ));
210                }
211                query.push_kv("repository", &::aws_smithy_http::query::fmt_string(inner_3));
212                let inner_4 = &_input.format;
213                let inner_4 = inner_4
214                    .as_ref()
215                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("format", "cannot be empty or unset"))?;
216                query.push_kv("format", &::aws_smithy_http::query::fmt_string(inner_4));
217                if let ::std::option::Option::Some(inner_5) = &_input.namespace {
218                    {
219                        query.push_kv("namespace", &::aws_smithy_http::query::fmt_string(inner_5));
220                    }
221                }
222                let inner_6 = &_input.package;
223                let inner_6 = inner_6
224                    .as_ref()
225                    .ok_or_else(|| ::aws_smithy_types::error::operation::BuildError::missing_field("package", "cannot be empty or unset"))?;
226                if inner_6.is_empty() {
227                    return ::std::result::Result::Err(::aws_smithy_types::error::operation::BuildError::missing_field(
228                        "package",
229                        "cannot be empty or unset",
230                    ));
231                }
232                query.push_kv("package", &::aws_smithy_http::query::fmt_string(inner_6));
233                if let ::std::option::Option::Some(inner_7) = &_input.status {
234                    {
235                        query.push_kv("status", &::aws_smithy_http::query::fmt_string(inner_7));
236                    }
237                }
238                if let ::std::option::Option::Some(inner_8) = &_input.sort_by {
239                    {
240                        query.push_kv("sortBy", &::aws_smithy_http::query::fmt_string(inner_8));
241                    }
242                }
243                if let ::std::option::Option::Some(inner_9) = &_input.max_results {
244                    {
245                        query.push_kv("max-results", ::aws_smithy_types::primitive::Encoder::from(*inner_9).encode());
246                    }
247                }
248                if let ::std::option::Option::Some(inner_10) = &_input.next_token {
249                    {
250                        query.push_kv("next-token", &::aws_smithy_http::query::fmt_string(inner_10));
251                    }
252                }
253                if let ::std::option::Option::Some(inner_11) = &_input.origin_type {
254                    {
255                        query.push_kv("originType", &::aws_smithy_http::query::fmt_string(inner_11));
256                    }
257                }
258                ::std::result::Result::Ok(())
259            }
260            #[allow(clippy::unnecessary_wraps)]
261            fn update_http_builder(
262                input: &crate::operation::list_package_versions::ListPackageVersionsInput,
263                builder: ::http::request::Builder,
264            ) -> ::std::result::Result<::http::request::Builder, ::aws_smithy_types::error::operation::BuildError> {
265                let mut uri = ::std::string::String::new();
266                uri_base(input, &mut uri)?;
267                uri_query(input, &mut uri)?;
268                ::std::result::Result::Ok(builder.method("POST").uri(uri))
269            }
270            let mut builder = update_http_builder(&input, ::http::request::Builder::new())?;
271            builder
272        };
273        let body = ::aws_smithy_types::body::SdkBody::from("");
274
275        ::std::result::Result::Ok(request_builder.body(body).expect("valid request").try_into().unwrap())
276    }
277}
278#[derive(Debug)]
279struct ListPackageVersionsEndpointParamsInterceptor;
280
281impl ::aws_smithy_runtime_api::client::interceptors::Intercept for ListPackageVersionsEndpointParamsInterceptor {
282    fn name(&self) -> &'static str {
283        "ListPackageVersionsEndpointParamsInterceptor"
284    }
285
286    fn read_before_execution(
287        &self,
288        context: &::aws_smithy_runtime_api::client::interceptors::context::BeforeSerializationInterceptorContextRef<
289            '_,
290            ::aws_smithy_runtime_api::client::interceptors::context::Input,
291            ::aws_smithy_runtime_api::client::interceptors::context::Output,
292            ::aws_smithy_runtime_api::client::interceptors::context::Error,
293        >,
294        cfg: &mut ::aws_smithy_types::config_bag::ConfigBag,
295    ) -> ::std::result::Result<(), ::aws_smithy_runtime_api::box_error::BoxError> {
296        let _input = context
297            .input()
298            .downcast_ref::<ListPackageVersionsInput>()
299            .ok_or("failed to downcast to ListPackageVersionsInput")?;
300
301        let params = crate::config::endpoint::Params::builder()
302            .set_region(cfg.load::<::aws_types::region::Region>().map(|r| r.as_ref().to_owned()))
303            .set_use_dual_stack(cfg.load::<::aws_types::endpoint_config::UseDualStack>().map(|ty| ty.0))
304            .set_use_fips(cfg.load::<::aws_types::endpoint_config::UseFips>().map(|ty| ty.0))
305            .set_endpoint(cfg.load::<::aws_types::endpoint_config::EndpointUrl>().map(|ty| ty.0.clone()))
306            .build()
307            .map_err(|err| {
308                ::aws_smithy_runtime_api::client::interceptors::error::ContextAttachedError::new("endpoint params could not be built", err)
309            })?;
310        cfg.interceptor_state()
311            .store_put(::aws_smithy_runtime_api::client::endpoint::EndpointResolverParams::new(params));
312        ::std::result::Result::Ok(())
313    }
314}
315
316// The get_* functions below are generated from JMESPath expressions in the
317// operationContextParams trait. They target the operation's input shape.
318
319/// Error type for the `ListPackageVersionsError` operation.
320#[non_exhaustive]
321#[derive(::std::fmt::Debug)]
322pub enum ListPackageVersionsError {
323    /// <p>The operation did not succeed because of an unauthorized access attempt.</p>
324    AccessDeniedException(crate::types::error::AccessDeniedException),
325    /// <p>The operation did not succeed because of an error that occurred inside CodeArtifact.</p>
326    InternalServerException(crate::types::error::InternalServerException),
327    /// <p>The operation did not succeed because the resource requested is not found in the service.</p>
328    ResourceNotFoundException(crate::types::error::ResourceNotFoundException),
329    /// <p>The operation did not succeed because too many requests are sent to the service.</p>
330    ThrottlingException(crate::types::error::ThrottlingException),
331    /// <p>The operation did not succeed because a parameter in the request was sent with an invalid value.</p>
332    ValidationException(crate::types::error::ValidationException),
333    /// An unexpected error occurred (e.g., invalid JSON returned by the service or an unknown error code).
334    #[deprecated(note = "Matching `Unhandled` directly is not forwards compatible. Instead, match using a \
335    variable wildcard pattern and check `.code()`:
336     \
337    &nbsp;&nbsp;&nbsp;`err if err.code() == Some(\"SpecificExceptionCode\") => { /* handle the error */ }`
338     \
339    See [`ProvideErrorMetadata`](#impl-ProvideErrorMetadata-for-ListPackageVersionsError) for what information is available for the error.")]
340    Unhandled(crate::error::sealed_unhandled::Unhandled),
341}
342impl ListPackageVersionsError {
343    /// Creates the `ListPackageVersionsError::Unhandled` variant from any error type.
344    pub fn unhandled(
345        err: impl ::std::convert::Into<::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>>,
346    ) -> Self {
347        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
348            source: err.into(),
349            meta: ::std::default::Default::default(),
350        })
351    }
352
353    /// Creates the `ListPackageVersionsError::Unhandled` variant from an [`ErrorMetadata`](::aws_smithy_types::error::ErrorMetadata).
354    pub fn generic(err: ::aws_smithy_types::error::ErrorMetadata) -> Self {
355        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
356            source: err.clone().into(),
357            meta: err,
358        })
359    }
360    ///
361    /// Returns error metadata, which includes the error code, message,
362    /// request ID, and potentially additional information.
363    ///
364    pub fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
365        match self {
366            Self::AccessDeniedException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
367            Self::InternalServerException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
368            Self::ResourceNotFoundException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
369            Self::ThrottlingException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
370            Self::ValidationException(e) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(e),
371            Self::Unhandled(e) => &e.meta,
372        }
373    }
374    /// Returns `true` if the error kind is `ListPackageVersionsError::AccessDeniedException`.
375    pub fn is_access_denied_exception(&self) -> bool {
376        matches!(self, Self::AccessDeniedException(_))
377    }
378    /// Returns `true` if the error kind is `ListPackageVersionsError::InternalServerException`.
379    pub fn is_internal_server_exception(&self) -> bool {
380        matches!(self, Self::InternalServerException(_))
381    }
382    /// Returns `true` if the error kind is `ListPackageVersionsError::ResourceNotFoundException`.
383    pub fn is_resource_not_found_exception(&self) -> bool {
384        matches!(self, Self::ResourceNotFoundException(_))
385    }
386    /// Returns `true` if the error kind is `ListPackageVersionsError::ThrottlingException`.
387    pub fn is_throttling_exception(&self) -> bool {
388        matches!(self, Self::ThrottlingException(_))
389    }
390    /// Returns `true` if the error kind is `ListPackageVersionsError::ValidationException`.
391    pub fn is_validation_exception(&self) -> bool {
392        matches!(self, Self::ValidationException(_))
393    }
394}
395impl ::std::error::Error for ListPackageVersionsError {
396    fn source(&self) -> ::std::option::Option<&(dyn ::std::error::Error + 'static)> {
397        match self {
398            Self::AccessDeniedException(_inner) => ::std::option::Option::Some(_inner),
399            Self::InternalServerException(_inner) => ::std::option::Option::Some(_inner),
400            Self::ResourceNotFoundException(_inner) => ::std::option::Option::Some(_inner),
401            Self::ThrottlingException(_inner) => ::std::option::Option::Some(_inner),
402            Self::ValidationException(_inner) => ::std::option::Option::Some(_inner),
403            Self::Unhandled(_inner) => ::std::option::Option::Some(&*_inner.source),
404        }
405    }
406}
407impl ::std::fmt::Display for ListPackageVersionsError {
408    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
409        match self {
410            Self::AccessDeniedException(_inner) => _inner.fmt(f),
411            Self::InternalServerException(_inner) => _inner.fmt(f),
412            Self::ResourceNotFoundException(_inner) => _inner.fmt(f),
413            Self::ThrottlingException(_inner) => _inner.fmt(f),
414            Self::ValidationException(_inner) => _inner.fmt(f),
415            Self::Unhandled(_inner) => {
416                if let ::std::option::Option::Some(code) = ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self) {
417                    write!(f, "unhandled error ({code})")
418                } else {
419                    f.write_str("unhandled error")
420                }
421            }
422        }
423    }
424}
425impl ::aws_smithy_types::retry::ProvideErrorKind for ListPackageVersionsError {
426    fn code(&self) -> ::std::option::Option<&str> {
427        ::aws_smithy_types::error::metadata::ProvideErrorMetadata::code(self)
428    }
429    fn retryable_error_kind(&self) -> ::std::option::Option<::aws_smithy_types::retry::ErrorKind> {
430        ::std::option::Option::None
431    }
432}
433impl ::aws_smithy_types::error::metadata::ProvideErrorMetadata for ListPackageVersionsError {
434    fn meta(&self) -> &::aws_smithy_types::error::ErrorMetadata {
435        match self {
436            Self::AccessDeniedException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
437            Self::InternalServerException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
438            Self::ResourceNotFoundException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
439            Self::ThrottlingException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
440            Self::ValidationException(_inner) => ::aws_smithy_types::error::metadata::ProvideErrorMetadata::meta(_inner),
441            Self::Unhandled(_inner) => &_inner.meta,
442        }
443    }
444}
445impl ::aws_smithy_runtime_api::client::result::CreateUnhandledError for ListPackageVersionsError {
446    fn create_unhandled_error(
447        source: ::std::boxed::Box<dyn ::std::error::Error + ::std::marker::Send + ::std::marker::Sync + 'static>,
448        meta: ::std::option::Option<::aws_smithy_types::error::ErrorMetadata>,
449    ) -> Self {
450        Self::Unhandled(crate::error::sealed_unhandled::Unhandled {
451            source,
452            meta: meta.unwrap_or_default(),
453        })
454    }
455}
456impl ::aws_types::request_id::RequestId for crate::operation::list_package_versions::ListPackageVersionsError {
457    fn request_id(&self) -> Option<&str> {
458        self.meta().request_id()
459    }
460}
461
462pub use crate::operation::list_package_versions::_list_package_versions_output::ListPackageVersionsOutput;
463
464pub use crate::operation::list_package_versions::_list_package_versions_input::ListPackageVersionsInput;
465
466mod _list_package_versions_input;
467
468mod _list_package_versions_output;
469
470/// Builders
471pub mod builders;
472
473/// Paginator for this operation
474pub mod paginator;