Package org.dspace.app.rest.projection

Class EmbedRelsProjection

java.lang.Object

org.dspace.app.rest.projection.AbstractProjection

org.dspace.app.rest.projection.EmbedRelsProjection

All Implemented Interfaces:

Projection

public class EmbedRelsProjection
extends AbstractProjection

Projection that allows a given set of rels to be embedded. A Rel refers to a Link Relation, this is an Embedded Object of the HalResource and the HalResource contains a link to this

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NAME

Fields inherited from interface org.dspace.app.rest.projection.Projection

DEFAULT

Constructor Summary

Constructors

Constructor	Description
EmbedRelsProjection(Set<String> embedRels, Set<String> embedSizes)	The EmbedRelsProjection will take a set of embed relations and embed sizes as a parameter that will be added to the projection.

Method Summary

Modifier and Type	Method	Description
boolean	allowEmbedding(HALResource<? extends RestAddressableModel> halResource, LinkRest linkRest, org.springframework.hateoas.Link... oldLinks)	Tells whether this projection permits the embedding of a particular embeddable subresource.
Map<String,Integer>	getEmbedSizes()
String	getName()	Gets the projection name.
org.springframework.data.domain.PageRequest	getPagingOptions(String rel, HALResource<? extends RestAddressableModel> resource, org.springframework.hateoas.Link... oldLinks)	This method will return the PageRequest object for a specific given rel
void	setEmbedSizes(Map<String,Integer> embedSizes)

Methods inherited from class org.dspace.app.rest.projection.AbstractProjection

allowLinking, transformModel, transformResource, transformRest

Methods inherited from class java.lang.Object

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

Field Details

NAME

public static final String NAME

See Also:

• Constant Field Values

Constructor Details

EmbedRelsProjection

public EmbedRelsProjection(Set<String> embedRels,
 Set<String> embedSizes)

The EmbedRelsProjection will take a set of embed relations and embed sizes as a parameter that will be added to the projection. The set of embedRels contains strings representing the embedded relation. The set of embedSizes contains a string containing the embedded relation followed by a "=" and the size of the embedded relation. Example: embed=collections&embed.size=collections=5 - These parameters will ensure that the embedded collections size will be limited to 5

Parameters:

embedRels - The embedded relations

embedSizes - The sizes of the embedded relations defined as {relation}={size}

Method Details

getName

public String getName()

Description copied from interface: Projection

Gets the projection name.

Returns:

the name, which is a unique alphanumeric string.

allowEmbedding

public boolean allowEmbedding(HALResource<? extends RestAddressableModel> halResource,
 LinkRest linkRest,
 org.springframework.hateoas.Link... oldLinks)

Description copied from interface: Projection

Tells whether this projection permits the embedding of a particular embeddable subresource. This gives the projection an opportunity to opt in to to certain embeds, by returning true. Note: If this method returns true for a given subresource, it will be automatically linked regardless of what Projection.allowLinking(HALResource, LinkRest) returns.

Specified by:

allowEmbedding in interface Projection

Overrides:

allowEmbedding in class AbstractProjection

Parameters:

halResource - the resource from which the embed may or may not be made.

linkRest - the LinkRest annotation through which the related resource was discovered on the rest object.

oldLinks - The previously traversed links

Returns:

true if allowed, false otherwise.

getPagingOptions

public org.springframework.data.domain.PageRequest getPagingOptions(String rel,
 HALResource<? extends RestAddressableModel> resource,
 org.springframework.hateoas.Link... oldLinks)

Description copied from interface: Projection

This method will return the PageRequest object for a specific given rel

Specified by:

getPagingOptions in interface Projection

Overrides:

getPagingOptions in class AbstractProjection

Parameters:

rel - The rel for which the PageRequest object will be made

resource - the resource from which the embed may or may not be made.

oldLinks - The previously traversed links

Returns:

The PageRequest object for the given rel

getEmbedSizes

public Map<String,Integer> getEmbedSizes()

setEmbedSizes

public void setEmbedSizes(Map<String,Integer> embedSizes)