Mercurial > lada > lada-server

annotate src/main/java/de/intevation/lada/data/Repository.java @ 134:8250e5bb7c84

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Removed unused imports.
author Raimund Renkert <rrenkert@intevation.de>
date Thu, 13 Jun 2013 17:19:17 +0200
parents 4e181a4aaab0
children f33f6e1ba9f8
rev   line source
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1 package de.intevation.lada.data;
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2
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3 import java.util.List;
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4 import java.util.Map;
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5
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6 import javax.enterprise.context.ApplicationScoped;
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7 import javax.inject.Inject;
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8 import javax.persistence.EntityManager;
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9 import javax.persistence.criteria.CriteriaBuilder;
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10 import javax.persistence.criteria.CriteriaQuery;
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11 import javax.persistence.criteria.Root;
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12 import javax.inject.Named;
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13
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14 import de.intevation.lada.rest.Response;
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16 /**
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17 * This generic Container is an interface to request and select Data
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18 * obejcts from the connected database.
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19 *
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20 * @author <a href="mailto:rrenkert@intevation.de">Raimund Renkert</a>
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21 */
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22 @Named
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23 @ApplicationScoped
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24 public abstract class Repository
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25 {
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26 /**
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27 * The entitymanager managing the data.
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28 */
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29 @Inject
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30 private EntityManager em;
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31
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32 public abstract Response create(Object object);
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33
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34 public abstract Response update(Object object);
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35
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36 public abstract Response filter(Map<String, String> keys);
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38 /**
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39 * Get all objects of type <link>clazz</link>from database.
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40 *
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41 * @param clazz The class type.
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42 * @return List of objects.
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43 */
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44 public <T> Response findAll(Class<T> clazz) {
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45 CriteriaBuilder builder = em.getCriteriaBuilder();
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46 CriteriaQuery<T> criteria = builder.createQuery(clazz);
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47 Root<T> member = criteria.from(clazz);
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48 criteria.select(member);
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49 List<T> result = em.createQuery(criteria).getResultList();
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50 return new Response(true, 200, result);
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51 }
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53 /**
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54 * Find a single object identified by its id.
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55 *
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56 * @param clazz The class type.
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57 * @param id The object id.
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58 * @return The requested object of type clazz
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59 */
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60 public <T> Response findById(Class<T> clazz, String id) {
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61 T item = em.find(clazz, id);
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62 if (item == null) {
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63 return new Response(false, 600, null);
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64 }
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65 return new Response(true, 200, item);
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66 }
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68 /**
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69 * Filter object list by the given criteria.
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70 *
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71 * @param criteria
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72 * @return List of LProbe objects.
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73 */
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74 public <T> List<T> filter(CriteriaQuery<T> criteria) {
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75 return em.createQuery(criteria).getResultList();
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76 }
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78 public CriteriaBuilder getCriteriaBuilder() {
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79 return em.getCriteriaBuilder();
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80 }
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81 }
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