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Package: DerivedAttributeAdapter
DerivedAttributeAdapter
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| DerivedAttributeAdapter(EObject, EStructuralFeature) |
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| DerivedAttributeAdapter(EObject, EStructuralFeature, EStructuralFeature) |
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| DerivedAttributeAdapter(EObject, EStructuralFeature, EStructuralFeature, EStructuralFeature) |
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| DerivedAttributeAdapter(EObject, EStructuralFeature, EStructuralFeature, EStructuralFeature, EStructuralFeature) |
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| addLocalDependency(EStructuralFeature) |
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| addNavigatedDependency(EStructuralFeature, EStructuralFeature) |
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| notifyChanged(Notification) |
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| notifyDerivedAttributeChange() |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2013 EclipseSource Muenchen GmbH and others.
3: *
4: * All rights reserved. This program and the accompanying materials
5: * are made available under the terms of the Eclipse Public License 2.0
6: * which accompanies this distribution, and is available at
7: * https://www.eclipse.org/legal/epl-2.0/
8: *
9: * SPDX-License-Identifier: EPL-2.0
10: *
11: * Contributors:
12: * Eugen Neufeld - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emf.ecp.view.spi.categorization.model;
15:
16: import java.util.ArrayList;
17: import java.util.List;
18:
19: import org.eclipse.emf.common.notify.Adapter;
20: import org.eclipse.emf.common.notify.Notification;
21: import org.eclipse.emf.common.notify.impl.AdapterImpl;
22: import org.eclipse.emf.ecore.EObject;
23: import org.eclipse.emf.ecore.EStructuralFeature;
24: import org.eclipse.emf.ecore.InternalEObject;
25: import org.eclipse.emf.ecore.impl.ENotificationImpl;
26: import org.eclipse.emf.ecore.util.EContentAdapter;
27:
28: /**
29: * @author Eugen Neufeld
30: *
31: */
32: public class DerivedAttributeAdapter extends AdapterImpl {
33: private final InternalEObject source;
34: private final EStructuralFeature derivedFeature;
35:
36: private final List<EStructuralFeature> localFeatures = new ArrayList<EStructuralFeature>();
37:
38: // TODO this lot could be put into a subclass and put in a list to allow for
39: // multiple navigated dependencies
40: private EStructuralFeature dependantFeature;
41: private EStructuralFeature navigationFeature;
42:
43: private final Adapter dependantAdapter = new EContentAdapter() {
44:
45: @Override
46: public void notifyChanged(Notification msg) {
47:
48: if (msg.getEventType() == Notification.SET
49: && (msg.getFeature().equals(dependantFeature) || dependantFeature == null)) {
50: notifyDerivedAttributeChange();
51: }
52: }
53: };
54:
55: /**
56: * Convenience constructor for a local and navigated dependency.
57: *
58: * @param source the source {@link EObject}
59: * @param derivedFeature the derived {@link EStructuralFeature}
60: * @param navigationFeature the feature used for navigation
61: * @param dependantFeature the {@link EStructuralFeature} being derived
62: * @param localFeature the local {@link EStructuralFeature} being derived
63: */
64: public DerivedAttributeAdapter(EObject source, EStructuralFeature derivedFeature,
65: EStructuralFeature navigationFeature, EStructuralFeature dependantFeature, EStructuralFeature localFeature) {
66: this(source, derivedFeature);
67: addNavigatedDependency(navigationFeature, dependantFeature);
68: addLocalDependency(localFeature);
69: }
70:
71: /**
72: * Convenience constructor for a navigated dependency.
73: *
74: * @param source the source {@link EObject}
75: * @param derivedFeature the derived {@link EStructuralFeature}
76: * @param navigationFeature the feature used for navigation
77: * @param dependantFeature the {@link EStructuralFeature} being derived
78: */
79: public DerivedAttributeAdapter(EObject source, EStructuralFeature derivedFeature,
80: EStructuralFeature navigationFeature, EStructuralFeature dependantFeature) {
81: this(source, derivedFeature);
82: addNavigatedDependency(navigationFeature, dependantFeature);
83: }
84:
85: /**
86: * Convenience constructor for a local dependency.
87: *
88: * @param source the source {@link EObject}
89: * @param derivedFeature the derived {@link EStructuralFeature}
90: * @param localFeature the local {@link EStructuralFeature} being derived
91: */
92: public DerivedAttributeAdapter(EObject source, EStructuralFeature derivedFeature,
93: EStructuralFeature localFeature) {
94: this(source, derivedFeature);
95: addLocalDependency(localFeature);
96: }
97:
98: /**
99: * Constructor with source object and the derived feature.
100: *
101: * @param source the source {@link EObject}
102: * @param derivedFeature the derived {@link EStructuralFeature}
103: */
104: public DerivedAttributeAdapter(EObject source, EStructuralFeature derivedFeature) {
105: super();
106: this.source = (InternalEObject) source;
107: this.derivedFeature = derivedFeature;
108: source.eAdapters().add(this);
109: }
110:
111: /**
112: * Adds a navigated dependency for a derived feature.
113: *
114: * @param navigationFeature the feature used for navigation
115: * @param dependantFeature the {@link EStructuralFeature} being derived
116: */
117: public void addNavigatedDependency(EStructuralFeature navigationFeature,
118: EStructuralFeature dependantFeature) {
119: this.dependantFeature = dependantFeature;
120: this.navigationFeature = navigationFeature;
121: }
122:
123: /**
124: * Adds a local dependency for a derived feature.
125: *
126: * @param localFeature the local {@link EStructuralFeature} being derived
127: */
128: public void addLocalDependency(EStructuralFeature localFeature) {
129: localFeatures.add(localFeature);
130: }
131:
132: @Override
133: public void notifyChanged(Notification notification) {
134:• if (notification == null || notification.getFeature() == null) {
135: return;
136: }
137:• if (notification.getFeature().equals(navigationFeature)) {
138:• switch (notification.getEventType()) {
139: // TODO support ADD_MANY/REMOVE_MANY?
140: case Notification.ADD:
141: final EObject added = (EObject) notification.getNewValue();
142: added.eAdapters().add(dependantAdapter);
143: break;
144: case Notification.SET:
145: final EObject newValue = (EObject) notification.getNewValue();
146: final EObject oldValue = (EObject) notification.getOldValue();
147:• if (oldValue != null) {
148: oldValue.eAdapters().remove(dependantAdapter);
149: }
150:• if (newValue != null) {
151: newValue.eAdapters().add(dependantAdapter);
152: }
153: break;
154: case Notification.REMOVE:
155: final EObject removed = (EObject) notification.getOldValue();
156: removed.eAdapters().remove(dependantAdapter);
157: break;
158: default:
159: return; // No notification
160: }
161: notifyDerivedAttributeChange();
162:• } else if (localFeatures.contains(notification.getFeature())) {
163: notifyDerivedAttributeChange();
164: }
165: }
166:
167: private void notifyDerivedAttributeChange() {
168:• if (source.eNotificationRequired()) {
169: source.eNotify(new ENotificationImpl(source, Notification.SET,
170: derivedFeature, null, source.eGet(derivedFeature, true,
171: true)));
172: }
173: }
174: }