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
|
/*******************************************************************************
* Copyright (c) 2010-2015, Andras Szabolcs Nagy and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package org.eclipse.viatra.dse.statecoding.simple;
import java.util.Arrays;
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 org.eclipse.emf.common.notify.Notifier;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EReference;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.ecore.EStructuralFeature.Setting;
import org.eclipse.viatra.dse.api.DSEException;
import org.eclipse.viatra.dse.statecode.IStateCoder;
import org.eclipse.viatra.dse.util.EMFHelper.MetaModelElements;
import org.eclipse.viatra.dse.util.ValueComparableEObjectStringMap;
import org.eclipse.viatra.query.runtime.api.IPatternMatch;
import org.eclipse.viatra.query.runtime.api.ViatraQueryEngine;
import org.eclipse.viatra.query.runtime.base.api.FeatureListener;
import org.eclipse.viatra.query.runtime.base.api.IndexingLevel;
import org.eclipse.viatra.query.runtime.base.api.InstanceListener;
import org.eclipse.viatra.query.runtime.base.api.NavigationHelper;
import org.eclipse.viatra.query.runtime.emf.EMFBaseIndexWrapper;
import org.eclipse.viatra.query.runtime.emf.EMFScope;
import org.eclipse.viatra.query.runtime.exception.ViatraQueryException;
/**
*
* @author Andras Szabolcs Nagy
*
*/
public class SimpleStateCoder implements IStateCoder {
private Set<EClass> classes;
private Set<EStructuralFeature> features;
private NavigationHelper navigationHelper;
private Map<EClass, Map<EObject, String>> objectCodes;
private int maxDepth;
private Set<EObject> changedOrNewEObjects = new HashSet<EObject>();
private Set<EObject> deletedClasses = new HashSet<EObject>();
public SimpleStateCoder(MetaModelElements metaModelElements) {
this.maxDepth = 1;
classes = metaModelElements.classes;
features = new HashSet<EStructuralFeature>(metaModelElements.attributes);
features.addAll(metaModelElements.references);
}
@Override
public void init(Notifier notifier) {
try {
EMFScope scope = new EMFScope(notifier);
ViatraQueryEngine queryEngine = ViatraQueryEngine.on(scope);
EMFBaseIndexWrapper baseIndex = (EMFBaseIndexWrapper) queryEngine.getBaseIndex();
navigationHelper = baseIndex.getNavigationHelper();
navigationHelper.registerObservedTypes(classes, null, features, IndexingLevel.FULL);
} catch (ViatraQueryException e) {
throw new DSEException(e);
}
objectCodes = new HashMap<EClass, Map<EObject, String>>();
for (EClass eClass : classes) {
Map<EObject, String> codes = new ValueComparableEObjectStringMap();
objectCodes.put(eClass, codes);
for (EObject eObject : navigationHelper.getDirectInstances(eClass)) {
codes.put(eObject, createObjectCodeWithDepth(eObject, maxDepth));
}
}
navigationHelper.addFeatureListener(features, new FeatureListener() {
@Override
public void featureInserted(EObject host, EStructuralFeature feature, Object value) {
changedOrNewEObjects.add(host);
}
@Override
public void featureDeleted(EObject host, EStructuralFeature feature, Object value) {
changedOrNewEObjects.add(host);
if (value instanceof EObject) {
changedOrNewEObjects.add((EObject) value);
}
}
});
navigationHelper.addInstanceListener(classes, new InstanceListener() {
@Override
public void instanceInserted(EClass clazz, EObject instance) {
changedOrNewEObjects.add(instance);
}
@Override
public void instanceDeleted(EClass clazz, EObject instance) {
deletedClasses.add(instance);
}
});
}
private String createObjectCodeWithDepth(EObject eObject, int depth) {
StringBuilder sb = new StringBuilder();
Collection<EAttribute> attributes = eObject.eClass().getEAllAttributes();
for (EAttribute eAttribute : attributes) {
Object value = eObject.eGet(eAttribute);
sb.append(value);
sb.append(',');
}
if (!attributes.isEmpty()) {
sb.deleteCharAt(sb.length() - 1);
}
if (depth > 0) {
sb.append('-');
Collection<EReference> eReferences = eObject.eClass().getEAllReferences();
for (EReference eReference : eReferences) {
Object value = eObject.eGet(eReference);
if (value == null) {
sb.append("null,");
} else if (value instanceof EObject) {
sb.append(createObjectCodeWithDepth((EObject) value, depth - 1));
sb.append(',');
} else {
List<EObject> referencedEObjects = (List<EObject>) value;
if (!referencedEObjects.isEmpty()) {
String[] codes = new String[referencedEObjects.size()];
int index = 0;
for (EObject referencedEObject : referencedEObjects) {
codes[index++] = createObjectCodeWithDepth(referencedEObject, depth - 1);
}
Arrays.sort(codes);
sb.append('(');
for (String code : codes) {
sb.append(code);
}
sb.append("),");
}
}
}
sb.deleteCharAt(sb.length() - 1);
}
return sb.toString();
}
@Override
public Object createStateCode() {
refreshObjectCodes();
StringBuilder sb = new StringBuilder();
for (EClass eClass : classes) {
Set<EObject> instances = navigationHelper.getDirectInstances(eClass);
if (!instances.isEmpty()) {
sb.append(eClass.getName());
sb.append(':');
String[] codesToSort = new String[instances.size()];
int index = 0;
Map<EObject, String> codes = objectCodes.get(eClass);
for (EObject eObject : instances) {
codesToSort[index++] = codes.get(eObject);
}
Arrays.sort(codesToSort);
for (String string : codesToSort) {
sb.append(string);
sb.append(';');
}
sb.deleteCharAt(sb.length() - 1);
sb.append('|');
}
}
if (sb.length() != 0) {
sb.deleteCharAt(sb.length() - 1);
}
return sb.toString();
}
private void refreshObjectCodes() {
for (EObject eObject : deletedClasses) {
EClass eClass = eObject.eClass();
objectCodes.get(eClass).remove(eObject);
}
deletedClasses.clear();
Set<EObject> objectsToRecode = new HashSet<EObject>();
for (EObject eObject : changedOrNewEObjects) {
objectsToRecode.add(eObject);
for (Setting setting : navigationHelper.getInverseReferences(eObject)) {
objectsToRecode.add(setting.getEObject());
}
}
for (EObject eObject : objectsToRecode) {
EClass eClass = eObject.eClass();
objectCodes.get(eClass).put(eObject, createObjectCodeWithDepth(eObject, maxDepth));
}
changedOrNewEObjects.clear();
}
@Override
public Object createActivationCode(IPatternMatch match) {
StringBuilder sb = new StringBuilder();
String[] tokens = match.specification().getFullyQualifiedName().split("\\.");
sb.append(tokens[tokens.length - 1]);
sb.append(':');
Object param;
for (int i = 0; (param = match.get(i)) != null; i++) {
EObject eObject = (EObject) param;
Collection<EAttribute> attributes = eObject.eClass().getEAllAttributes();
for (EAttribute eAttribute : attributes) {
Object value = eObject.eGet(eAttribute);
sb.append(value);
sb.append(',');
}
if (!attributes.isEmpty()) {
sb.deleteCharAt(sb.length() - 1);
}
sb.append('|');
}
sb.deleteCharAt(sb.length() - 1);
return sb.toString().intern();
}
}
|
