Java tutorial
/* * Copyright 2013 University of Southern California * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package edu.isi.misd.scanner.network.registry.web.controller; import edu.isi.misd.scanner.network.registry.data.domain.DataSetVariableMetadata; import edu.isi.misd.scanner.network.registry.data.repository.DataSetVariableMetadataRepository; import edu.isi.misd.scanner.network.registry.data.service.RegistryService; import edu.isi.misd.scanner.network.registry.data.service.RegistryServiceConstants; import edu.isi.misd.scanner.network.registry.web.errors.ConflictException; import edu.isi.misd.scanner.network.registry.web.errors.ForbiddenException; import edu.isi.misd.scanner.network.registry.web.errors.ResourceNotFoundException; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Map; import org.apache.commons.collections.CollectionUtils; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.dao.DataIntegrityViolationException; import org.springframework.http.HttpStatus; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestHeader; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.ResponseStatus; /** * @author Mike D'Arcy */ @Controller public class DataSetVariableMetadataController extends BaseController { private static final Log log = LogFactory.getLog(DataSetVariableMetadataController.class.getName()); public static final String BASE_PATH = "/variables"; public static final String ENTITY_PATH = BASE_PATH + ID_URL_PATH; public static final String REQUEST_PARAM_DATASET_ID = "dataSetId"; public static final String REQUEST_PARAM_DATASET_NAME = "dataSetName"; @Autowired private DataSetVariableMetadataRepository dataSetVariableMetadataRepository; @Autowired private RegistryService registryService; @RequestMapping(value = BASE_PATH, method = { RequestMethod.GET, RequestMethod.HEAD }, produces = HEADER_JSON_MEDIA_TYPE) public @ResponseBody List<DataSetVariableMetadata> getDataSetVariableMetadata( @RequestParam Map<String, String> paramMap) { Map<String, String> params = validateParameterMap(paramMap, REQUEST_PARAM_DATASET_ID); if (!params.isEmpty()) { String dataSetId = params.get(REQUEST_PARAM_DATASET_ID); return dataSetVariableMetadataRepository.findByDataSetDefinitionDataSetDefinitionId( validateIntegerParameter(REQUEST_PARAM_DATASET_ID, dataSetId)); } List<DataSetVariableMetadata> dataSetVariableMetadata = new ArrayList<DataSetVariableMetadata>(); Iterator iter = dataSetVariableMetadataRepository.findAll().iterator(); CollectionUtils.addAll(dataSetVariableMetadata, iter); return dataSetVariableMetadata; } @RequestMapping(value = ENTITY_PATH, method = { RequestMethod.GET, RequestMethod.HEAD }, produces = HEADER_JSON_MEDIA_TYPE) public @ResponseBody DataSetVariableMetadata getDataSetVariableMetadata( @PathVariable(ID_URL_PATH_VAR) Integer id) { DataSetVariableMetadata foundDataSetVariableMetadata = dataSetVariableMetadataRepository.findOne(id); if (foundDataSetVariableMetadata == null) { throw new ResourceNotFoundException(id); } return foundDataSetVariableMetadata; } @RequestMapping(value = BASE_PATH, method = RequestMethod.POST, consumes = HEADER_JSON_MEDIA_TYPE, produces = HEADER_JSON_MEDIA_TYPE) @ResponseStatus(value = HttpStatus.CREATED) public @ResponseBody DataSetVariableMetadata createDataSetVariableMetadata( @RequestHeader(HEADER_LOGIN_NAME) String loginName, @RequestBody DataSetVariableMetadata dataSetVariableMetadata) { try { dataSetVariableMetadataRepository.save(dataSetVariableMetadata); } catch (DataIntegrityViolationException e) { log.warn(e); throw new ConflictException(e.getMostSpecificCause()); } // force the re-query to ensure a complete result view if updated return dataSetVariableMetadataRepository.findOne(dataSetVariableMetadata.getDataSetVariableMetadataId()); } @RequestMapping(value = ENTITY_PATH, method = RequestMethod.PUT, consumes = HEADER_JSON_MEDIA_TYPE, produces = HEADER_JSON_MEDIA_TYPE) public @ResponseBody DataSetVariableMetadata updateDataSetVariableMetadata( @RequestHeader(HEADER_LOGIN_NAME) String loginName, @PathVariable(ID_URL_PATH_VAR) Integer id, @RequestBody DataSetVariableMetadata dataSetVariableMetadata) { // find the requested resource DataSetVariableMetadata foundDataSetVariableMetadata = dataSetVariableMetadataRepository.findOne(id); // if the ID is not found then throw a ResourceNotFoundException (404) if (foundDataSetVariableMetadata == null) { throw new ResourceNotFoundException(id); } // if the ID in the request body is null, use the ID parsed from the URL // if the ID is found in the request body but does not match the ID in // the current data, then throw a ConflictException (409) Integer updateID = dataSetVariableMetadata.getDataSetVariableMetadataId(); if (updateID == null) { dataSetVariableMetadata.setDataSetVariableMetadataId(id); } else if (!dataSetVariableMetadata.getDataSetVariableMetadataId() .equals(foundDataSetVariableMetadata.getDataSetVariableMetadataId())) { throw new ConflictException(dataSetVariableMetadata.getDataSetVariableMetadataId(), foundDataSetVariableMetadata.getDataSetVariableMetadataId()); } try { dataSetVariableMetadataRepository.save(dataSetVariableMetadata); } catch (DataIntegrityViolationException e) { log.warn(e); throw new ConflictException(e.getMostSpecificCause()); } // force the re-query to ensure a complete result view if updated return dataSetVariableMetadataRepository.findOne(dataSetVariableMetadata.getDataSetVariableMetadataId()); } @RequestMapping(value = ENTITY_PATH, method = RequestMethod.DELETE) @ResponseStatus(value = HttpStatus.NO_CONTENT) public void removeDataSetVariableMetadata(@RequestHeader(HEADER_LOGIN_NAME) String loginName, @PathVariable(ID_URL_PATH_VAR) Integer id) { // check that the user can perform the delete if (!registryService.userIsSuperuser(loginName)) { throw new ForbiddenException(loginName, RegistryServiceConstants.MSG_SUPERUSER_ROLE_REQUIRED); } if (!dataSetVariableMetadataRepository.exists(id)) { throw new ResourceNotFoundException(id); } dataSetVariableMetadataRepository.delete(id); } }