org.springframework.data.web

Class PagedResourcesAssembler<T>

java.lang.Object

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

All Implemented Interfaces:

org.springframework.hateoas.ResourceAssembler<Page<T>,org.springframework.hateoas.PagedResources<org.springframework.hateoas.Resource<T>>>

public class PagedResourcesAssembler<T>
extends Object
implements org.springframework.hateoas.ResourceAssembler<Page<T>,org.springframework.hateoas.PagedResources<org.springframework.hateoas.Resource<T>>>

ResourceAssembler to easily convert Page instances into PagedResources.

Since:

1.6

Author:

Oliver Gierke, Nick Williams, Marcel Overdijk

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected <R extends org.springframework.hateoas.ResourceSupport,S> org.springframework.hateoas.PagedResources<R>	createPagedResource(List<R> resources, org.springframework.hateoas.PagedResources.PageMetadata metadata, Page<S> page) Creates the PagedResources to be equipped with pagination links downstream.
protected MethodParameter	getMethodParameter() Return the MethodParameter to be used to potentially qualify the paging and sorting request parameters to.
void	setForceFirstAndLastRels(boolean forceFirstAndLastRels) Configures whether to always add first and last links to the PagedResources created.
org.springframework.hateoas.PagedResources<?>	toEmptyResource(Page<?> page, Class<?> type) Creates a PagedResources with an empt collection EmbeddedWrapper for the given domain type.
org.springframework.hateoas.PagedResources<?>	toEmptyResource(Page<?> page, Class<?> type, org.springframework.hateoas.Link link) Creates a PagedResources with an empt collection EmbeddedWrapper for the given domain type.
org.springframework.hateoas.PagedResources<org.springframework.hateoas.Resource<T>>	toResource(Page<T> entity)
org.springframework.hateoas.PagedResources<org.springframework.hateoas.Resource<T>>	toResource(Page<T> page, org.springframework.hateoas.Link selfLink) Creates a new PagedResources by converting the given Page into a PagedResources.PageMetadata instance and wrapping the contained elements into Resource instances.
<R extends org.springframework.hateoas.ResourceSupport> org.springframework.hateoas.PagedResources<R>	toResource(Page<T> page, org.springframework.hateoas.ResourceAssembler<T,R> assembler) Creates a new PagedResources by converting the given Page into a PagedResources.PageMetadata instance and using the given ResourceAssembler to turn elements of the Page into resources.
<R extends org.springframework.hateoas.ResourceSupport> org.springframework.hateoas.PagedResources<R>	toResource(Page<T> page, org.springframework.hateoas.ResourceAssembler<T,R> assembler, org.springframework.hateoas.Link link) Creates a new PagedResources by converting the given Page into a PagedResources.PageMetadata instance and using the given ResourceAssembler to turn elements of the Page into resources.

Methods inherited from class java.lang.Object

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

Constructor Detail

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 toResource(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 Detail

setForceFirstAndLastRels

public void setForceFirstAndLastRels(boolean forceFirstAndLastRels)

Configures whether to always add first and last links to the PagedResources 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 PagedResources created.

Since:

1.11

toResource

public org.springframework.hateoas.PagedResources<org.springframework.hateoas.Resource<T>> toResource(Page<T> entity)

Specified by:

toResource in interface org.springframework.hateoas.ResourceAssembler<Page<T>,org.springframework.hateoas.PagedResources<org.springframework.hateoas.Resource<T>>>

toResource

public org.springframework.hateoas.PagedResources<org.springframework.hateoas.Resource<T>> toResource(Page<T> page,
                                                                                                      org.springframework.hateoas.Link selfLink)

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

Parameters:

page - must not be null.

selfLink - must not be null.

Returns:

toResource

public <R extends org.springframework.hateoas.ResourceSupport> org.springframework.hateoas.PagedResources<R> toResource(Page<T> page,
                                                                                                                        org.springframework.hateoas.ResourceAssembler<T,R> assembler)

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

Parameters:

page - must not be null.

assembler - must not be null.

Returns:

toResource

public <R extends org.springframework.hateoas.ResourceSupport> org.springframework.hateoas.PagedResources<R> toResource(Page<T> page,
                                                                                                                        org.springframework.hateoas.ResourceAssembler<T,R> assembler,
                                                                                                                        org.springframework.hateoas.Link link)

Creates a new PagedResources by converting the given Page into a PagedResources.PageMetadata instance and using the given ResourceAssembler 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:

toEmptyResource

public org.springframework.hateoas.PagedResources<?> toEmptyResource(Page<?> page,
                                                                     Class<?> type)

Creates a PagedResources 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

toEmptyResource

public org.springframework.hateoas.PagedResources<?> toEmptyResource(Page<?> page,
                                                                     Class<?> type,
                                                                     org.springframework.hateoas.Link link)

Creates a PagedResources 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

createPagedResource

protected <R extends org.springframework.hateoas.ResourceSupport,S> org.springframework.hateoas.PagedResources<R> createPagedResource(List<R> resources,
                                                                                                                                      org.springframework.hateoas.PagedResources.PageMetadata metadata,
                                                                                                                                      Page<S> page)

Creates the PagedResources to be equipped with pagination links downstream.

Parameters:

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

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

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

Returns:

must not be null.

getMethodParameter

@Nullable
protected MethodParameter getMethodParameter()

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