List of usage examples for org.springframework.data.domain PageImpl map
@Override
public <U> Page<U> map(Function<? super T, ? extends U> converter)
From source file:org.dspace.app.rest.model.hateoas.DSpaceResource.java
public DSpaceResource(T data, Utils utils, String... rels) { this.data = data; if (data != null) { try {//ww w . jav a 2 s . c o m LinksRest links = data.getClass().getDeclaredAnnotation(LinksRest.class); if (links != null && rels != null) { List<String> relsList = Arrays.asList(rels); for (LinkRest linkAnnotation : links.links()) { if (!relsList.contains(linkAnnotation.name())) { continue; } String name = linkAnnotation.name(); Link linkToSubResource = utils.linkToSubResource(data, name); String apiCategory = data.getCategory(); String model = data.getType(); LinkRestRepository linkRepository = utils.getLinkResourceRepository(apiCategory, model, linkAnnotation.name()); if (!linkRepository.isEmbeddableRelation(data, linkAnnotation.name())) { continue; } try { //RestModel linkClass = linkAnnotation.linkClass().newInstance(); Method[] methods = linkRepository.getClass().getMethods(); boolean found = false; for (Method m : methods) { if (StringUtils.equals(m.getName(), linkAnnotation.method())) { // TODO add support for single linked object other than for collections Page<? extends Serializable> pageResult = (Page<? extends RestModel>) m.invoke( linkRepository, null, ((BaseObjectRest) data).getId(), null, null); EmbeddedPage ep = new EmbeddedPage(linkToSubResource.getHref(), pageResult, null); embedded.put(name, ep); found = true; } } // TODO custom exception if (!found) { throw new RuntimeException("Method for relation " + linkAnnotation.name() + " not found: " + linkAnnotation.method()); } } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { throw new RuntimeException(e.getMessage(), e); } } } for (PropertyDescriptor pd : Introspector.getBeanInfo(data.getClass()).getPropertyDescriptors()) { Method readMethod = pd.getReadMethod(); String name = pd.getName(); if (readMethod != null && !"class".equals(name)) { LinkRest linkAnnotation = readMethod.getAnnotation(LinkRest.class); if (linkAnnotation != null) { if (StringUtils.isNotBlank(linkAnnotation.name())) { name = linkAnnotation.name(); } Link linkToSubResource = utils.linkToSubResource(data, name); // no method is specified to retrieve the linked object(s) so check if it is already here if (StringUtils.isBlank(linkAnnotation.method())) { this.add(linkToSubResource); Object linkedObject = readMethod.invoke(data); Object wrapObject = linkedObject; if (linkedObject instanceof RestModel) { RestModel linkedRM = (RestModel) linkedObject; wrapObject = utils .getResourceRepository(linkedRM.getCategory(), linkedRM.getType()) .wrapResource(linkedRM); } else { if (linkedObject instanceof List) { List<RestModel> linkedRMList = (List<RestModel>) linkedObject; if (linkedRMList.size() > 0) { DSpaceRestRepository<RestModel, ?> resourceRepository = utils .getResourceRepository(linkedRMList.get(0).getCategory(), linkedRMList.get(0).getType()); // TODO should we force pagination also of embedded resource? // This will force a pagination with size 10 for embedded collections as well // int pageSize = 1; // PageImpl<RestModel> page = new PageImpl( // linkedRMList.subList(0, // linkedRMList.size() > pageSize ? pageSize : linkedRMList.size()), new PageRequest(0, pageSize), linkedRMList.size()); PageImpl<RestModel> page = new PageImpl(linkedRMList); wrapObject = new EmbeddedPage(linkToSubResource.getHref(), page.map(resourceRepository::wrapResource), linkedRMList); } else { wrapObject = null; } } } if (linkedObject != null) { embedded.put(name, wrapObject); } else { embedded.put(name, null); } Method writeMethod = pd.getWriteMethod(); writeMethod.invoke(data, new Object[] { null }); } else { // call the link repository try { //RestModel linkClass = linkAnnotation.linkClass().newInstance(); String apiCategory = data.getCategory(); String model = data.getType(); LinkRestRepository linkRepository = utils.getLinkResourceRepository(apiCategory, model, linkAnnotation.name()); Method[] methods = linkRepository.getClass().getMethods(); boolean found = false; for (Method m : methods) { if (StringUtils.equals(m.getName(), linkAnnotation.method())) { // TODO add support for single linked object other than for collections Page<? extends Serializable> pageResult = (Page<? extends RestModel>) m .invoke(linkRepository, null, ((BaseObjectRest) data).getId(), null, null); EmbeddedPage ep = new EmbeddedPage(linkToSubResource.getHref(), pageResult, null); embedded.put(name, ep); found = true; } } // TODO custom exception if (!found) { throw new RuntimeException("Method for relation " + linkAnnotation.name() + " not found: " + linkAnnotation.method()); } } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { throw new RuntimeException(e.getMessage(), e); } } } else if (RestModel.class.isAssignableFrom(readMethod.getReturnType())) { Link linkToSubResource = utils.linkToSubResource(data, name); this.add(linkToSubResource); RestModel linkedObject = (RestModel) readMethod.invoke(data); if (linkedObject != null) { embedded.put(name, utils .getResourceRepository(linkedObject.getCategory(), linkedObject.getType()) .wrapResource(linkedObject)); } else { embedded.put(name, null); } Method writeMethod = pd.getWriteMethod(); writeMethod.invoke(data, new Object[] { null }); } } } } catch (IntrospectionException | IllegalArgumentException | IllegalAccessException | InvocationTargetException e) { throw new RuntimeException(e.getMessage(), e); } this.add(utils.linkToSingleResource(data, Link.REL_SELF)); } }
From source file:org.dspace.app.rest.RestResourceController.java
private <ID extends Serializable> ResourceSupport findRelEntryInternal(HttpServletRequest request, String apiCategory, String model, String id, String rel, String relid, Pageable page, PagedResourcesAssembler assembler, String projection) { checkModelPluralForm(apiCategory, model); DSpaceRestRepository<RestModel, ID> repository = utils.getResourceRepository(apiCategory, model); Class<RestModel> domainClass = repository.getDomainClass(); LinkRest linkRest = utils.getLinkRest(rel, domainClass); if (linkRest != null) { LinkRestRepository linkRepository = utils.getLinkResourceRepository(apiCategory, model, linkRest.name());//w w w . j a v a 2 s . c o m Method linkMethod = repositoryUtils.getLinkMethod("getResource", linkRepository); try { Object object = linkMethod.invoke(linkRepository, request, id, relid, page, projection); Link link = linkTo(this.getClass(), apiCategory, English.plural(model)).slash(id).slash(rel) .withSelfRel(); List result = new ArrayList(); result.add(object); PageImpl<RestModel> pageResult = new PageImpl(result, page, 1); return assembler.toResource(pageResult.map(linkRepository::wrapResource), link); } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) { throw new RuntimeException(e.getMessage(), e); } } return null; }