-
Notifications
You must be signed in to change notification settings - Fork 14
/
TypedQueryImpl.java
254 lines (226 loc) · 8.33 KB
/
TypedQueryImpl.java
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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
/**
* Copyright (C) 2016 Czech Technical University in Prague
* <p>
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
* version.
* <p>
* This program 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 General Public License for more
* details. You should have received a copy of the GNU General Public License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.model;
import cz.cvut.kbss.jopa.exceptions.NoResultException;
import cz.cvut.kbss.jopa.exceptions.NoUniqueResultException;
import cz.cvut.kbss.jopa.exceptions.OWLPersistenceException;
import cz.cvut.kbss.jopa.model.descriptors.Descriptor;
import cz.cvut.kbss.jopa.model.descriptors.EntityDescriptor;
import cz.cvut.kbss.jopa.model.query.Parameter;
import cz.cvut.kbss.jopa.model.query.TypedQuery;
import cz.cvut.kbss.jopa.query.QueryHolder;
import cz.cvut.kbss.jopa.sessions.ConnectionWrapper;
import cz.cvut.kbss.jopa.sessions.MetamodelProvider;
import cz.cvut.kbss.jopa.sessions.UnitOfWork;
import cz.cvut.kbss.jopa.utils.ErrorUtils;
import cz.cvut.kbss.ontodriver.ResultSet;
import cz.cvut.kbss.ontodriver.exception.OntoDriverException;
import java.net.URI;
import java.util.*;
public class TypedQueryImpl<X> extends AbstractQuery implements TypedQuery<X> {
private final Class<X> resultType;
private final MetamodelProvider metamodelProvider;
private UnitOfWork uow;
private Descriptor descriptor;
public TypedQueryImpl(final QueryHolder query, final Class<X> resultType,
final ConnectionWrapper connection, MetamodelProvider metamodelProvider) {
super(query, connection);
this.resultType = Objects.requireNonNull(resultType, ErrorUtils.getNPXMessageSupplier("resultType"));
this.metamodelProvider = Objects
.requireNonNull(metamodelProvider, ErrorUtils.getNPXMessageSupplier("metamodelProvider"));
}
public void setUnitOfWork(UnitOfWork uow) {
this.uow = uow;
}
@Override
public void executeUpdate() {
executeUpdateImpl();
}
@Override
public List<X> getResultList() {
if (maxResults == 0) {
return Collections.emptyList();
}
List<X> list;
try {
list = getResultListImpl(maxResults);
} catch (OntoDriverException e) {
markTransactionForRollback();
throw queryEvaluationException(e);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return list;
}
private List<X> getResultListImpl(int maxResults) throws OntoDriverException {
assert maxResults > 0;
final boolean isTypeManaged = metamodelProvider.isTypeManaged(resultType);
final Descriptor instDescriptor = descriptor != null ? descriptor : new EntityDescriptor();
final List<X> res = new ArrayList<>();
executeQuery(rs -> {
if (isTypeManaged) {
loadEntityInstance(rs, instDescriptor).ifPresent(res::add);
} else {
res.add(loadResultValue(rs));
}
});
return res;
}
private Optional<X> loadEntityInstance(ResultSet resultSet, Descriptor instanceDescriptor)
throws OntoDriverException {
if (uow == null) {
throw new IllegalStateException("Cannot load entity instance without Unit of Work.");
}
final URI uri = URI.create(resultSet.getString(0));
return Optional.ofNullable(uow.readObject(resultType, uri, instanceDescriptor));
}
private X loadResultValue(ResultSet resultSet) throws OntoDriverException {
try {
return resultSet.getObject(0, resultType);
} catch (OntoDriverException e) {
throw new OWLPersistenceException("Unable to map the query result to class " + resultType, e);
}
}
@Override
public X getSingleResult() {
try {
// call it with maxResults = 2 just to see whether there are
// multiple results
final List<X> res = getResultListImpl(2);
if (res.isEmpty()) {
throw new NoResultException("No result found for query " + query);
}
if (res.size() > 1) {
throw new NoUniqueResultException("Multiple results found for query " + query);
}
return res.get(0);
} catch (OntoDriverException e) {
markTransactionForRollback();
throw queryEvaluationException(e);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
}
@Override
public TypedQuery<X> setMaxResults(int maxResults) {
if (maxResults < 0) {
markTransactionForRollback();
throw new IllegalArgumentException("Cannot set maximum number of results to less than 0.");
}
this.maxResults = maxResults;
return this;
}
@Override
public TypedQuery<X> setFirstResult(int startPosition) {
checkNumericParameter(startPosition, "first result offset");
this.firstResult = startPosition;
return this;
}
@Override
public TypedQuery<X> setParameter(int position, Object value) {
try {
query.setParameter(query.getParameter(position), value);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public TypedQuery<X> setParameter(int position, String value, String language) {
try {
query.setParameter(query.getParameter(position), value, language);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public TypedQuery<X> setParameter(String name, Object value) {
try {
query.setParameter(query.getParameter(name), value);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public TypedQuery<X> setParameter(String name, String value, String language) {
try {
query.setParameter(query.getParameter(name), value, language);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public <T> TypedQuery<X> setParameter(Parameter<T> parameter, T value) {
try {
query.setParameter(parameter, value);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public TypedQuery<X> setParameter(Parameter<String> parameter, String value, String language) {
try {
query.setParameter(parameter, value, language);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public TypedQuery<X> setUntypedParameter(int position, Object value) {
try {
query.setUntypedParameter(query.getParameter(position), value);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public TypedQuery<X> setUntypedParameter(String name, Object value) {
try {
query.setUntypedParameter(query.getParameter(name), value);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public <T> TypedQuery<X> setUntypedParameter(Parameter<T> parameter, T value) {
try {
query.setUntypedParameter(parameter, value);
} catch (RuntimeException e) {
markTransactionForRollback();
throw e;
}
return this;
}
@Override
public TypedQuery<X> setDescriptor(Descriptor descriptor) {
this.descriptor = descriptor;
return this;
}
}