Java tutorial
/** * This file is part of D.A.L.G.S. * * D.A.L.G.S is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * D.A.L.G.S is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with D.A.L.G.S. If not, see <http://www.gnu.org/licenses/>. */ package es.ucm.fdi.dalgs.module.service; import java.io.IOException; import java.util.ArrayList; import java.util.Collection; import java.util.List; import java.util.Locale; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.MessageSource; import org.springframework.security.access.prepost.PreAuthorize; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import org.supercsv.prefs.CsvPreference; import es.ucm.fdi.dalgs.acl.service.AclObjectService; import es.ucm.fdi.dalgs.classes.ResultClass; import es.ucm.fdi.dalgs.classes.UploadForm; import es.ucm.fdi.dalgs.degree.service.DegreeService; import es.ucm.fdi.dalgs.domain.Degree; import es.ucm.fdi.dalgs.domain.Module; import es.ucm.fdi.dalgs.module.repository.ModuleRepository; import es.ucm.fdi.dalgs.topic.service.TopicService; @Service public class ModuleService { @Autowired private ModuleRepository repositoryModule; @Autowired private DegreeService serviceDegree; @Autowired private TopicService serviceTopic; @Autowired private AclObjectService manageAclService; @Autowired private MessageSource messageSource; @PreAuthorize("hasRole('ROLE_ADMIN')") @Transactional(readOnly = false) public ResultClass<Module> addModule(Module module, Long id_degree, Locale locale) { boolean success = false; Module moduleExists = repositoryModule.existByCode(module.getInfo().getCode(), id_degree); ResultClass<Module> result = new ResultClass<Module>(); if (moduleExists != null) { result.setHasErrors(true); Collection<String> errors = new ArrayList<String>(); errors.add(messageSource.getMessage("error.Code", null, locale)); if (moduleExists.getIsDeleted()) { result.setElementDeleted(true); errors.add(messageSource.getMessage("error.deleted", null, locale)); result.setSingleElement(moduleExists); } else result.setSingleElement(module); result.setErrorsList(errors); } else { module.setDegree(serviceDegree.getDegree(id_degree).getSingleElement()); success = repositoryModule.addModule(module); if (success) { moduleExists = repositoryModule.existByCode(module.getInfo().getCode(), id_degree); success = manageAclService.addACLToObject(moduleExists.getId(), moduleExists.getClass().getName()); if (success) result.setSingleElement(module); } else { throw new IllegalArgumentException("Cannot create ACL. Object not set."); } } return result; } @PreAuthorize("isAuthenticated()") @Transactional(readOnly = true) public ResultClass<Module> getAll() { ResultClass<Module> result = new ResultClass<Module>(); result.addAll(repositoryModule.getAll()); return result; } @PreAuthorize("hasPermission(#module, 'WRITE') or hasPermission(#module, 'ADMINISTRATION')") @Transactional(readOnly = false) public ResultClass<Boolean> modifyModule(Module module, Long id_module, Long id_degree, Locale locale) { ResultClass<Boolean> result = new ResultClass<Boolean>(); Module modifyModule = repositoryModule.getModule(id_module, id_degree); Module moduleExists = repositoryModule.existByCode(module.getInfo().getCode(), id_degree); if (!module.getInfo().getCode().equalsIgnoreCase(modifyModule.getInfo().getCode()) && moduleExists != null) { result.setHasErrors(true); Collection<String> errors = new ArrayList<String>(); errors.add(messageSource.getMessage("error.newCode", null, locale)); if (moduleExists.getIsDeleted()) { result.setElementDeleted(true); errors.add(messageSource.getMessage("error.deleted", null, locale)); } result.setErrorsList(errors); result.setSingleElement(false); } else { modifyModule.setInfo(module.getInfo()); boolean r = repositoryModule.saveModule(modifyModule); if (r) result.setSingleElement(true); } return result; } @PreAuthorize("isAuthenticated()") @Transactional(readOnly = true) public ResultClass<Module> getModule(Long id, Long id_degree) { ResultClass<Module> result = new ResultClass<Module>(); result.setSingleElement(repositoryModule.getModule(id, id_degree)); return result; } @PreAuthorize("hasRole('ROLE_ADMIN')") @Transactional(readOnly = false) public ResultClass<Boolean> deleteModule(Module module) { ResultClass<Boolean> result = new ResultClass<Boolean>(); if (serviceTopic.deleteTopicsForModule(module).getSingleElement()) { result.setSingleElement(repositoryModule.deleteModule(module)); return result; } result.setSingleElement(false); return result; } @PreAuthorize("isAuthenticated()") @Transactional(readOnly = true) public ResultClass<Module> getModuleAll(Long id_module, Long id_degree, Boolean show) { ResultClass<Module> result = new ResultClass<Module>(); Module p = repositoryModule.getModule(id_module, id_degree); if (p != null) { p.setTopics(serviceTopic.getTopicsForModule(id_module, show)); result.setSingleElement(p); } return result; } @PreAuthorize("isAuthenticated()") @Transactional(readOnly = true) public ResultClass<Module> getModulesForDegree(Long id, Boolean show) { ResultClass<Module> result = new ResultClass<>(); result.addAll(repositoryModule.getModulesForDegree(id, show)); return result; } @PreAuthorize("hasRole('ROLE_ADMIN')") @Transactional(readOnly = false) public ResultClass<Boolean> deleteModulesForDegree(Degree d) { ResultClass<Boolean> result = new ResultClass<Boolean>(); if (serviceTopic.deleteTopicsForModules(d.getModules()).getSingleElement()) { result.setSingleElement(repositoryModule.deleteModulesForDegree(d)); } else result.setSingleElement(false); return result; } @PreAuthorize("hasRole('ROLE_ADMIN')") @Transactional(readOnly = false) public ResultClass<Module> unDeleteModule(Module module, Long id_degree, Locale locale) { Module m = repositoryModule.existByCode(module.getInfo().getCode(), id_degree); ResultClass<Module> result = new ResultClass<Module>(); if (m == null) { result.setHasErrors(true); Collection<String> errors = new ArrayList<String>(); errors.add(messageSource.getMessage("error.ElementNoExists", null, locale)); result.setErrorsList(errors); result.setSingleElement(module); } else { if (!m.getIsDeleted()) { Collection<String> errors = new ArrayList<String>(); errors.add(messageSource.getMessage("error.CodeNoDeleted", null, locale)); result.setErrorsList(errors); result.setSingleElement(module); } m.setDeleted(false); m.setInfo(module.getInfo()); boolean r = repositoryModule.saveModule(m); if (r) result.setSingleElement(m); } return result; } @PreAuthorize("hasRole('ROLE_ADMIN')") @Transactional(readOnly = false) public ResultClass<Boolean> uploadCSV(UploadForm upload, Long id_degree, Locale locale) { ResultClass<Boolean> result = new ResultClass<>(); if (!upload.getFileData().isEmpty()) { CsvPreference prefers = new CsvPreference.Builder(upload.getQuoteChar().charAt(0), upload.getDelimiterChar().charAt(0), upload.getEndOfLineSymbols()).build(); List<Module> list = null; try { FileItem fileItem = upload.getFileData().getFileItem(); ModuleCSV moduleUpload = new ModuleCSV(); Degree d = serviceDegree.getDegree(id_degree).getSingleElement(); list = moduleUpload.readCSVModuleToBean(fileItem.getInputStream(), upload.getCharset(), prefers, d); if (list == null) { result.setHasErrors(true); result.getErrorsList().add(messageSource.getMessage("error.params", null, locale)); } else { result.setSingleElement(repositoryModule.persistListModules(list)); if (result.getSingleElement()) { for (Module c : list) { Module aux = repositoryModule.existByCode(c.getInfo().getCode(), id_degree); result.setSingleElement(result.getSingleElement() && manageAclService.addACLToObject(aux.getId(), aux.getClass().getName())); } } } } catch (IOException e) { e.printStackTrace(); result.setSingleElement(false); } } else { result.setHasErrors(true); result.getErrorsList().add(messageSource.getMessage("error.fileEmpty", null, locale)); } return result; } @PreAuthorize("hasRole('ROLE_ADMIN')") @Transactional(readOnly = false) public void downloadCSV(HttpServletResponse response) throws IOException { Collection<Module> modules = new ArrayList<Module>(); modules = repositoryModule.getAll(); if (!modules.isEmpty()) { ModuleCSV moduleCSV = new ModuleCSV(); moduleCSV.downloadCSV(response, modules); } } }