Package org.springframework.data.web

Class PagedResourcesAssembler<T>

java.lang.Object

org.springframework.data.web.PagedResourcesAssembler<T>

All Implemented Interfaces:

RepresentationModelAssembler<Page<T>,PagedModel<EntityModel<T>>>

public class PagedResourcesAssembler<T>
extends Object
implements RepresentationModelAssembler<Page<T>,PagedModel<EntityModel<T>>>

RepresentationModelAssembler to easily convert Page instances into PagedModel.

Since:

1.6

Author:

Oliver Gierke, Nick Williams, Marcel Overdijk

Constructor Summary

Constructors

Constructor	Description
PagedResourcesAssembler(HateoasPageableHandlerMethodArgumentResolver resolver, UriComponents baseUri)	Creates a new PagedResourcesAssembler using the given PageableHandlerMethodArgumentResolver and base URI.

Method Summary

Modifier and Type	Method	Description
protected <R extends RepresentationModel<?>, S> PagedModel<R>	createPagedModel(List<R> resources, PagedModel.PageMetadata metadata, Page<S> page)	Creates the PagedModel to be equipped with pagination links downstream.
protected MethodParameter	getMethodParameter()	Deprecated, for removal: This API element is subject to removal in a future version. since 3.1, rather set up the instance with withParameter(MethodParameter).
void	setForceFirstAndLastRels(boolean forceFirstAndLastRels)	Configures whether to always add first and last links to the PagedModel created.
PagedModel<?>	toEmptyModel(Page<?> page, Class<?> type)	Creates a PagedModel with an empt collection EmbeddedWrapper for the given domain type.
PagedModel<?>	toEmptyModel(Page<?> page, Class<?> type, Link link)	Creates a PagedModel with an empt collection EmbeddedWrapper for the given domain type.
PagedModel<EntityModel<T>>	toModel(Page<T> entity)
PagedModel<EntityModel<T>>	toModel(Page<T> page, Link selfLink)	Creates a new PagedModel by converting the given Page into a PagedModel.PageMetadata instance and wrapping the contained elements into PagedModel instances.
<R extends RepresentationModel<?>> PagedModel<R>	toModel(Page<T> page, RepresentationModelAssembler<T,R> assembler)	Creates a new PagedModel by converting the given Page into a PagedModel.PageMetadata instance and using the given PagedModel to turn elements of the Page into resources.
<R extends RepresentationModel<?>> PagedModel<R>	toModel(Page<T> page, RepresentationModelAssembler<T,R> assembler, Link link)	Creates a new PagedModel by converting the given Page into a PagedModel.PageMetadata instance and using the given PagedModel to turn elements of the Page into resources.
PagedResourcesAssembler<T>	withParameter(MethodParameter parameter)	Creates a new PagedResourcesAssembler with the given reference MethodParameter.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.hateoas.server.RepresentationModelAssembler

toCollectionModel

Constructor Details

PagedResourcesAssembler

public PagedResourcesAssembler(@Nullable
 HateoasPageableHandlerMethodArgumentResolver resolver,
 @Nullable
 UriComponents baseUri)

Creates a new PagedResourcesAssembler using the given PageableHandlerMethodArgumentResolver and base URI. If the former is null, a default one will be created. If the latter is null, calls to toModel(Page) will use the current request's URI to build the relevant previous and next links.

Parameters:

resolver - can be null.

baseUri - can be null.

Method Details

setForceFirstAndLastRels

public void setForceFirstAndLastRels(boolean forceFirstAndLastRels)

Configures whether to always add first and last links to the PagedModel created. Defaults to false which means that first and last links only appear in conjunction with prev and next links.

Parameters:

forceFirstAndLastRels - whether to always add first and last links to the PagedModel created.

Since:

1.11

withParameter

public PagedResourcesAssembler<T> withParameter(@Nullable
 MethodParameter parameter)

Creates a new PagedResourcesAssembler with the given reference MethodParameter.

Parameters:

parameter - can be null.

Returns:

will never be null.

Since:

3.1

toModel

public PagedModel<EntityModel<T>> toModel(Page<T> entity)

Specified by:

toModel in interface RepresentationModelAssembler<Page<T>,PagedModel<EntityModel<T>>>

toModel

public PagedModel<EntityModel<T>> toModel(Page<T> page,
 Link selfLink)

Creates a new PagedModel by converting the given Page into a PagedModel.PageMetadata instance and wrapping the contained elements into PagedModel instances. Will add pagination links based on the given the self link.

Parameters:

page - must not be null.

selfLink - must not be null.

Returns:

toModel

public <R extends RepresentationModel<?>>
PagedModel<R> toModel(Page<T> page,
 RepresentationModelAssembler<T,R> assembler)

Creates a new PagedModel by converting the given Page into a PagedModel.PageMetadata instance and using the given PagedModel to turn elements of the Page into resources.

Parameters:

page - must not be null.

assembler - must not be null.

Returns:

toModel

public <R extends RepresentationModel<?>>
PagedModel<R> toModel(Page<T> page,
 RepresentationModelAssembler<T,R> assembler,
 Link link)

Creates a new PagedModel by converting the given Page into a PagedModel.PageMetadata instance and using the given PagedModel to turn elements of the Page into resources. Will add pagination links based on the given the self link.

Parameters:

page - must not be null.

assembler - must not be null.

link - must not be null.

Returns:

toEmptyModel

public PagedModel<?> toEmptyModel(Page<?> page,
 Class<?> type)

Creates a PagedModel with an empt collection EmbeddedWrapper for the given domain type.

Parameters:

page - must not be null, content must be empty.

type - must not be null.

Returns:

Since:

2.0

toEmptyModel

public PagedModel<?> toEmptyModel(Page<?> page,
 Class<?> type,
 Link link)

Creates a PagedModel with an empt collection EmbeddedWrapper for the given domain type.

Parameters:

page - must not be null, content must be empty.

type - must not be null.

link - must not be null.

Returns:

Since:

1.11

createPagedModel

protected <R extends RepresentationModel<?>,
S>
PagedModel<R> createPagedModel(List<R> resources,
 PagedModel.PageMetadata metadata,
 Page<S> page)

Creates the PagedModel to be equipped with pagination links downstream.

Parameters:

resources - the original page's elements mapped into RepresentationModel instances.

metadata - the calculated PagedModel.PageMetadata, must not be null.

page - the original page handed to the assembler, must not be null.

Returns:

must not be null.

getMethodParameter

@Nullable
@Deprecated(since="3.1",
            forRemoval=true)
protected MethodParameter getMethodParameter()

Deprecated, for removal: This API element is subject to removal in a future version.

since 3.1, rather set up the instance with withParameter(MethodParameter).

Return the MethodParameter to be used to potentially qualify the paging and sorting request parameters to. Default implementations returns null, which means the parameters will not be qualified.

Returns:

Since:

1.7