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
|
/*
* Copyright 2022 - 2023 Anton Tananaev (anton@traccar.org)
*
* 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 org.traccar.storage;
import org.traccar.model.BaseModel;
import org.traccar.model.Pair;
import org.traccar.model.Permission;
import org.traccar.model.Server;
import org.traccar.storage.query.Condition;
import org.traccar.storage.query.Request;
import java.beans.Introspector;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.atomic.AtomicLong;
import java.util.stream.Collectors;
public class MemoryStorage extends Storage {
private final Map<Class<?>, Map<Long, Object>> objects = new HashMap<>();
private final Map<Pair<Class<?>, Class<?>>, Set<Pair<Long, Long>>> permissions = new HashMap<>();
private final AtomicLong increment = new AtomicLong();
public MemoryStorage() {
Server server = new Server();
server.setId(1);
server.setRegistration(true);
objects.put(Server.class, Map.of(server.getId(), server));
}
@Override
public <T> List<T> getObjects(Class<T> clazz, Request request) {
return objects.computeIfAbsent(clazz, key -> new HashMap<>()).values().stream()
.filter(object -> checkCondition(request.getCondition(), object))
.map(object -> (T) object)
.collect(Collectors.toList());
}
private boolean checkCondition(Condition genericCondition, Object object) {
if (genericCondition == null) {
return true;
}
if (genericCondition instanceof Condition.Compare) {
var condition = (Condition.Compare) genericCondition;
Object value = retrieveValue(object, condition.getVariable());
int result = ((Comparable) value).compareTo(condition.getValue());
switch (condition.getOperator()) {
case "<":
return result < 0;
case "<=":
return result <= 0;
case ">":
return result > 0;
case ">=":
return result >= 0;
case "=":
return result == 0;
default:
throw new RuntimeException("Unsupported comparison condition");
}
} else if (genericCondition instanceof Condition.Between) {
var condition = (Condition.Between) genericCondition;
Object fromValue = retrieveValue(object, condition.getFromVariable());
int fromResult = ((Comparable) fromValue).compareTo(condition.getFromValue());
Object toValue = retrieveValue(object, condition.getToVariable());
int toResult = ((Comparable) toValue).compareTo(condition.getToValue());
return fromResult >= 0 && toResult <= 0;
} else if (genericCondition instanceof Condition.Binary) {
var condition = (Condition.Binary) genericCondition;
if (condition.getOperator().equals("AND")) {
return checkCondition(condition.getFirst(), object) && checkCondition(condition.getSecond(), object);
} else if (condition.getOperator().equals("OR")) {
return checkCondition(condition.getFirst(), object) || checkCondition(condition.getSecond(), object);
}
} else if (genericCondition instanceof Condition.Permission) {
var condition = (Condition.Permission) genericCondition;
long id = (Long) retrieveValue(object, "id");
return getPermissionsSet(condition.getOwnerClass(), condition.getPropertyClass()).stream()
.anyMatch(pair -> {
if (condition.getOwnerId() > 0) {
return pair.getFirst() == condition.getOwnerId() && pair.getSecond() == id;
} else {
return pair.getFirst() == id && pair.getSecond() == condition.getPropertyId();
}
});
} else if (genericCondition instanceof Condition.LatestPositions) {
return false;
}
return false;
}
private Object retrieveValue(Object object, String key) {
try {
Method method = object.getClass().getMethod(
"get" + Character.toUpperCase(key.charAt(0)) + key.substring(1));
return method.invoke(object);
} catch (ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}
@Override
public <T> long addObject(T entity, Request request) {
long id = increment.incrementAndGet();
objects.computeIfAbsent(entity.getClass(), key -> new HashMap<>()).put(id, entity);
return id;
}
@Override
public <T> void updateObject(T entity, Request request) {
Set<String> columns = new HashSet<>(request.getColumns().getColumns(entity.getClass(), "get"));
Collection<Object> items;
if (request.getCondition() != null) {
long id = (Long) ((Condition.Equals) request.getCondition()).getValue();
items = List.of(objects.computeIfAbsent(entity.getClass(), key -> new HashMap<>()).get(id));
} else {
items = objects.computeIfAbsent(entity.getClass(), key -> new HashMap<>()).values();
}
for (Method setter : entity.getClass().getMethods()) {
if (setter.getName().startsWith("set") && setter.getParameterCount() == 1
&& columns.contains(Introspector.decapitalize(setter.getName()))) {
try {
Method getter = entity.getClass().getMethod(setter.getName().replaceFirst("set", "get"));
Object value = getter.invoke(entity);
for (Object object : items) {
setter.invoke(object, value);
}
} catch (ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}
}
}
@Override
public void removeObject(Class<?> clazz, Request request) {
long id = (Long) ((Condition.Equals) request.getCondition()).getValue();
objects.computeIfAbsent(clazz, key -> new HashMap<>()).remove(id);
}
private Set<Pair<Long, Long>> getPermissionsSet(Class<?> ownerClass, Class<?> propertyClass) {
return permissions.computeIfAbsent(new Pair<>(ownerClass, propertyClass), k -> new HashSet<>());
}
@Override
public List<Permission> getPermissions(
Class<? extends BaseModel> ownerClass, long ownerId,
Class<? extends BaseModel> propertyClass, long propertyId) {
return getPermissionsSet(ownerClass, propertyClass).stream()
.filter(pair -> ownerId == 0 || pair.getFirst().equals(ownerId))
.filter(pair -> propertyId == 0 || pair.getSecond().equals(propertyId))
.map(pair -> new Permission(ownerClass, pair.getFirst(), propertyClass, pair.getSecond()))
.collect(Collectors.toList());
}
@Override
public void addPermission(Permission permission) {
getPermissionsSet(permission.getOwnerClass(), permission.getPropertyClass())
.add(new Pair<>(permission.getOwnerId(), permission.getPropertyId()));
}
@Override
public void removePermission(Permission permission) {
getPermissionsSet(permission.getOwnerClass(), permission.getPropertyClass())
.remove(new Pair<>(permission.getOwnerId(), permission.getPropertyId()));
}
}
|
