GenericFacade.java
4.64 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
package fi.insomnia.bortal.facade;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import javax.persistence.metamodel.SingularAttribute;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import fi.insomnia.bortal.model.ModelInterface;
/**
* Session Bean implementation class GenericFacade
*/
public abstract class GenericFacade<PK, T extends ModelInterface> {
private static final Logger logger = LoggerFactory.getLogger(GenericFacade.class);
private Class<T> entClass;
public GenericFacade(Class<T> entityClass) {
this.entClass = entityClass;
}
protected Class<T> getEntityClass() {
return entClass;
}
protected abstract EntityManager getEm();
public void create(T entity) {
getEm().persist(entity);
}
public void remove(T entity) {
getEm().remove(entity);
}
public T merge(T entity) {
return getEm().merge(entity);
}
public T find(PK id) {
T ret = getEm().find(getEntityClass(), id);
return ret;
}
public List<T> findAll() {
CriteriaBuilder cb = getEm().getCriteriaBuilder();
CriteriaQuery<T> cq = cb.createQuery(getEntityClass());
Root<T> root = cq.from(getEntityClass());
cq.orderBy(cb.asc(root.get("id")));
cq.select(root);
return getEm().createQuery(cq).getResultList();
}
public List<T> findRange(int[] range) {
CriteriaQuery<T> cq = getEm().getCriteriaBuilder().createQuery(getEntityClass());
cq.select(cq.from(getEntityClass()));
TypedQuery<T> q = getEm().createQuery(cq);
q.setMaxResults(range[1] - range[0]);
q.setFirstResult(range[0]);
return q.getResultList();
}
public long count() {
CriteriaQuery<Long> cq = getEm().getCriteriaBuilder().createQuery(Long.class);
Root<T> rt = cq.from(getEntityClass());
cq.select(getEm().getCriteriaBuilder().count(rt));
TypedQuery<Long> q = getEm().createQuery(cq);
return q.getSingleResult();
}
protected static <K> K getSingleNullableResult(TypedQuery<K> q) {
K ret = null;
try {
ret = q.getSingleResult();
} catch (NoResultException e) {
ret = null;
}
return ret;
}
public void evict(T entity) {
if (entity != null && entity.getId() != null) {
getEm().getEntityManagerFactory().getCache().evict(getEntityClass(), entity.getId());
}
}
protected List<T> search(String query, String[] fields, String orderfield) {
CriteriaBuilder cb = getEm().getCriteriaBuilder();
CriteriaQuery<T> cq = cb.createQuery(getEntityClass());
Root<T> root = cq.from(getEntityClass());
List<Predicate> preds = new ArrayList<Predicate>();
for (String field : fields) {
Path<String> rootfield = root.get(field);
preds.add(cb.like(rootfield, query));
}
cq.where(cb.or(preds.toArray(new Predicate[preds.size()])));
if (orderfield != null) {
cq.orderBy(cb.asc(root.get(orderfield)));
}
cq.select(root);
TypedQuery<T> q = getEm().createQuery(cq);
logger.debug("Creating search query from fields {} query: {}", fields, cq);
List<T> ret = q.getResultList();
logger.debug("resultlist size {}", ret.size());
return ret;
}
//
// @SuppressWarnings("unchecked")
// public List<T> search(String query, String[] fields) {
// CompassSession sess =
// EclipseLinkHelper.getCurrentCompassSession(getEm());
// CompassQueryBuilder qb = sess.queryBuilder();
// CompassMultiPropertyQueryStringBuilder properties =
// qb.multiPropertyQueryString(query);
//
// for (String field : fields) {
// properties.add(field);
// }
// String alias = getClass().getSimpleName().toLowerCase();
//
// logger.debug("searching class {}", alias);
// CompassHits hits =
// qb.bool().addMust(qb.alias(alias)).addMust(properties.toQuery()).toQuery().hits();
//
// Iterator<CompassHit> iter = hits.iterator();
// ArrayList<T> ret = new ArrayList<T>();
// while (iter.hasNext()) {
//
// Object data = iter.next().getData();
// logger.debug("Found user {}", data);
// ret.add((T) data);
//
// }
// return ret;
//
// }
}