cdmlib-remote/src/main/java/eu/etaxonomy/cdm/remote/controller/BaseListController.java

   1 /**
   2  * Copyright (C) 2007 EDIT
   3  * European Distributed Institute of Taxonomy
   4  * http://www.e-taxonomy.eu
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version 1.1
   7  * See LICENSE.TXT at the top of this package for the full license terms.
   8  */
   9 package eu.etaxonomy.cdm.remote.controller;
  10
  11 import java.io.IOException;
  12 import java.util.ArrayList;
  13 import java.util.List;
  14 import java.util.UUID;
  15
  16 import javax.servlet.http.HttpServletRequest;
  17 import javax.servlet.http.HttpServletResponse;
  18
  19 import org.apache.logging.log4j.LogManager;
  20 import org.apache.logging.log4j.Logger;
  21 import org.springframework.web.bind.WebDataBinder;
  22 import org.springframework.web.bind.annotation.InitBinder;
  23 import org.springframework.web.bind.annotation.RequestMapping;
  24 import org.springframework.web.bind.annotation.RequestMethod;
  25 import org.springframework.web.bind.annotation.RequestParam;
  26
  27 import eu.etaxonomy.cdm.api.service.IClassificationService;
  28 import eu.etaxonomy.cdm.api.service.IService;
  29 import eu.etaxonomy.cdm.api.service.ITaxonNodeService;
  30 import eu.etaxonomy.cdm.api.service.pager.Pager;
  31 import eu.etaxonomy.cdm.model.common.CdmBase;
  32 import eu.etaxonomy.cdm.model.taxon.Classification;
  33 import eu.etaxonomy.cdm.model.taxon.TaxonNode;
  34 import eu.etaxonomy.cdm.persistence.dao.common.Restriction;
  35 import eu.etaxonomy.cdm.remote.controller.util.PagerParameters;
  36 import eu.etaxonomy.cdm.remote.editor.CdmTypePropertyEditor;
  37 import eu.etaxonomy.cdm.remote.editor.UUIDPropertyEditor;
  38
  39 /**
  40  * @author a.kohlbecker
  41  * @since 22.07.2009
  42  */
  43 public abstract class BaseListController <T extends CdmBase, SERVICE extends IService<T>> extends AbstractListController<T, SERVICE> {
  44
  45     private static final Logger logger = LogManager.getLogger();
  46
  47     @InitBinder
  48     public void initBinder(WebDataBinder binder) {
  49         binder.registerCustomEditor(UUID.class, new UUIDPropertyEditor());
  50         binder.registerCustomEditor(Class.class, new CdmTypePropertyEditor());
  51     }
  52
  53     /**
  54      * NOTE: The indices for pages are 0-based see {@link Pager}
  55      *
  56      * @param pageIndex
  57      *            the index of the page to be returned, the first page has the
  58      *            pageIndex = 0 - <i>optional parameter</i>. Defaults to 0 if
  59      *            set to <code>NULL</code>.
  60      * @param pageSize
  61      *            the maximum number of entities returned per page.
  62      *            The {@link #DEFAULT_PAGE_SIZE} will be used if pageSize is set to
  63      *            <code>null</code> - <i>optional parameter</i>
  64      * @param type
  65      *            Further restricts the type of entities to be returned.
  66      *            If null the base type <code>&lt;T&gt;</code> is being used. - <i>optional parameter</i>
  67      * @return
  68      * @throws IOException
  69      */
  70     @SuppressWarnings("unchecked")
  71     @RequestMapping(method = RequestMethod.GET)
  72     public Pager<T> doPage(
  73             @RequestParam(value = "pageIndex", required = false) Integer pageIndex,
  74             @RequestParam(value = "pageSize", required = false) Integer pageSize,
  75             @RequestParam(value = "class", required = false) Class type,
  76             @RequestParam(name="orderBy", defaultValue="BY_TITLE_CACHE_ASC", required=true) OrderHintPreset orderBy,
  77             HttpServletRequest request,
  78             HttpServletResponse response) throws IOException
  79             {
  80
  81         logger.info("doPage() " + requestPathAndQuery(request));
  82         PagerParameters pagerParameters = new PagerParameters(pageSize, pageIndex).normalizeAndValidate(response);
  83
  84         if(type != null) {
  85             orderBy = orderBy.checkSuitableFor(type);
  86             // TODO how can we check in case type == null?
  87         }
  88         return service.page(type, pagerParameters.getPageSize(), pagerParameters.getPageIndex(), orderBy.orderHints(), getInitializationStrategy());
  89     }
  90
  91     @SuppressWarnings("unchecked")
  92     @RequestMapping(method = {RequestMethod.GET, RequestMethod.POST}, params={"restriction"})
  93     public Pager<T> doPageByRestrictions(
  94             @RequestParam(value = "pageIndex", required = false) Integer pageIndex,
  95             @RequestParam(value = "pageSize", required = false) Integer pageSize,
  96             @RequestParam(value = "class", required = false) Class type,
  97             @RequestParam(value = "restriction", required = true) List<Restriction<?>> restrictions,
  98             @RequestParam(value = "initStrategy", required = true) List<String> initStrategy,
  99             @RequestParam(name="orderBy", defaultValue="BY_TITLE_CACHE_ASC", required=true) OrderHintPreset orderBy,
 100             HttpServletRequest request,
 101             HttpServletResponse response) throws IOException
 102             {
 103
 104         // NOTE: for testing with httpi and jq:
 105         // http GET :8080/portal/taxon.json restriction=='{"propertyName":"name.titleCache","matchMode":"EXACT","values":["Eunotia krammeri Metzeltin & Lange-Bert."]}' initStrategy=name.titleCache | jq '.records[].name.titleCache'
 106         logger.info("doPageByRestrictions() " + requestPathAndQuery(request));
 107         PagerParameters pagerParameters = new PagerParameters(pageSize, pageIndex).normalizeAndValidate(response);
 108
 109         if(type != null) {
 110             orderBy = orderBy.checkSuitableFor(type);
 111         }
 112
 113         return pageByRestrictions(type, initStrategy, orderBy, pagerParameters, new ArrayList<>(restrictions));
 114     }
 115
 116     /**
 117      * This method can be overwritten by subclasses, for example to apply additional filtering like for the publish flag.
 118      *
 119      * @param type
 120      * @param initStrategy
 121      * @param orderBy
 122      * @param pagerParameters
 123      * @param restrictions
 124      * @return
 125      */
 126     protected Pager<T> pageByRestrictions(Class<T> type, List<String> initStrategy, OrderHintPreset orderBy,
 127             PagerParameters pagerParameters, ArrayList<Restriction<?>> restrictions) {
 128         return service.page(type, restrictions, pagerParameters.getPageSize(), pagerParameters.getPageIndex(), orderBy.orderHints(), initStrategy);
 129     }
 130
 131 //    /**
 132 //     * Parameter less method to be used as default when request without parameter are made. Otherwise
 133 //     * the nameless methods {@link #doPage(Integer, Integer, Class)} and {@link #doList(Integer, Integer, Class)}
 134 //     * are ambigous.
 135 //     * @return
 136 //     * @throws IOException
 137 //     */
 138 //    @RequestMapping(method = RequestMethod.GET)
 139 //    public Pager<T> doPage(HttpServletRequest request, HttpServletResponse response) throws IOException{
 140 //        return doPage(null, null, null, request, response);
 141 //    }
 142
 143     /**
 144      * @param start
 145      *            The offset index from the start of the list. The first entity
 146      *            has the index = 0 - <i>required parameter</i>
 147      * @param limit
 148      *            The maximum number of entities returned. - <i>optional parameter</i>
 149      *            If limit is set to a value < 1 all entities will be returned
 150      * @param type
 151      *            Further restricts the type of entities to be returned.
 152      *            If null the base type <code>&lt;T&gt;</code> is being used. - <i>optional parameter</i>
 153      * @return a List of entities
 154      */
 155     @RequestMapping(method = RequestMethod.GET, params = "start")
 156     public List<T> doList(
 157             @RequestParam(value = "start", required = true) Integer start,
 158             @RequestParam(value = "limit", required = false) Integer limit,
 159             @RequestParam(value = "class", required = false) Class<T> type,
 160             HttpServletRequest request,
 161             @SuppressWarnings("unused") HttpServletResponse response) {
 162
 163         if (request != null){
 164             logger.info("doList() " + requestPathAndQuery(request));
 165         }
 166
 167         //if(start == null){ start = 0;}
 168         if(limit == null){
 169             limit = PagerParameters.DEFAULT_PAGESIZE;
 170         }else if(limit < 1){
 171             limit = null;
 172         }
 173         return service.list(type, limit, start, null, getInitializationStrategy());
 174     }
 175
 176     /**
 177      * Retrieves the according taxon node representing the taxon subtree. If no such taxon node
 178      * is found an 404 error response is sent.
 179      */
 180     // this is a copy from BaseController, should be unified
 181     protected TaxonNode getSubtreeOrError(UUID subtreeUuid, ITaxonNodeService taxonNodeService, HttpServletResponse response) throws IOException {
 182         TaxonNode subtree = null;
 183         if (subtreeUuid != null){
 184             subtree = taxonNodeService.find(subtreeUuid);
 185             if(subtree == null) {
 186                 response.sendError(404 , "Taxon node for subtree not found: " + subtreeUuid );
 187                 //will not happen
 188                 return null;
 189             }
 190         }
 191         return subtree;
 192     }
 193
 194     // this is a copy from BaseController, should be unified
 195     protected Classification getClassificationOrError(UUID classificationUuid,
 196             IClassificationService classificationService, HttpServletResponse response) throws IOException {
 197         Classification classification = null;
 198         if (classificationUuid != null){
 199             classification = classificationService.find(classificationUuid);
 200             if(classification == null) {
 201                 response.sendError(404 , "Classification not found: " + classificationUuid );
 202                 //will not happen
 203                 return null;
 204             }
 205         }
 206         return classification;
 207     }
 208
 209   /* TODO
 210    @RequestMapping(method = RequestMethod.POST)
 211   public T doPost(@ModelAttribute("object") T object, BindingResult result) {
 212         validator.validate(object, result);
 213         if (result.hasErrors()) {
 214                 // set http status code depending upon what happened, possibly return
 215             // the put object and errors so that they can be rendered into a suitable error response
 216         } else {
 217           // should set the status to 201 created  and "Location" header to "/resource/uuid"
 218           service.save(object);
 219         }
 220   }
 221   */
 222 }