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Package: StructuralChangeTesterKeyAttribute
StructuralChangeTesterKeyAttribute
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| StructuralChangeTesterKeyAttribute() |
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| activate(BundleContext) |
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| getEMFFormsStructuralChangeTester() |
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| isApplicable(VDomainModelReference) |
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| isRelevantKeyChange(VKeyAttributeDomainModelReference, EStructuralFeature.Setting, ModelChangeNotification) |
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| isStructureChanged(VDomainModelReference, EObject, ModelChangeNotification) |
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| setEMFFormsDatabindingEMF(EMFFormsDatabindingEMF) |
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| setEMFFormsStructuralChangeTester(EMFFormsStructuralChangeTester) |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2016 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: * Lucas Koehler - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emfforms.internal.core.services.structuralchange.keyattribute;
15:
16: import org.eclipse.emf.common.util.EList;
17: import org.eclipse.emf.ecore.EObject;
18: import org.eclipse.emf.ecore.EReference;
19: import org.eclipse.emf.ecore.EStructuralFeature.Setting;
20: import org.eclipse.emf.ecp.common.spi.asserts.Assert;
21: import org.eclipse.emf.ecp.view.spi.keyattributedmr.model.VKeyAttributeDomainModelReference;
22: import org.eclipse.emf.ecp.view.spi.model.ModelChangeNotification;
23: import org.eclipse.emf.ecp.view.spi.model.VDomainModelReference;
24: import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
25: import org.eclipse.emfforms.spi.core.services.databinding.emf.EMFFormsDatabindingEMF;
26: import org.eclipse.emfforms.spi.core.services.structuralchange.EMFFormsStructuralChangeTester;
27: import org.eclipse.emfforms.spi.core.services.structuralchange.StructuralChangeTesterInternal;
28: import org.osgi.framework.BundleContext;
29: import org.osgi.framework.ServiceReference;
30: import org.osgi.service.component.annotations.Activate;
31: import org.osgi.service.component.annotations.Component;
32: import org.osgi.service.component.annotations.Deactivate;
33: import org.osgi.service.component.annotations.Reference;
34:
35: /**
36: * The {@link StructuralChangeTesterInternal internal structural change tester} for
37: * {@link VKeyAttributeDomainModelReference VKeyAttributeDomainModelReferences}.
38: *
39: * @author Lucas Koehler
40: *
41: */
42: @Component(name = "StructuralChangeTesterKeyAttribute")
43: public class StructuralChangeTesterKeyAttribute implements StructuralChangeTesterInternal {
44:
45: private ServiceReference<EMFFormsStructuralChangeTester> emfFormsStructuralChangeTesterServiceReference;
46: private BundleContext bundleContext;
47: private EMFFormsStructuralChangeTester emfFormsStructuralChangeTester;
48: private EMFFormsDatabindingEMF emfFormsDatabindingEMF;
49:
50: /**
51: * Called by the OSGI framework to set the {@link EMFFormsDatabindingEMF}.
52: *
53: * @param emfFormsDatabindingEMF The {@link EMFFormsDatabindingEMF} to set
54: */
55: @Reference(unbind = "-")
56: protected void setEMFFormsDatabindingEMF(EMFFormsDatabindingEMF emfFormsDatabindingEMF) {
57: this.emfFormsDatabindingEMF = emfFormsDatabindingEMF;
58: }
59:
60: /**
61: * Only needed for testing. The {@link EMFFormsStructuralChangeTester} is not set by the OSGI framework.
62: *
63: * @param emfFormsStructuralChangeTester The {@link EMFFormsStructuralChangeTester} to set.
64: */
65: void setEMFFormsStructuralChangeTester(EMFFormsStructuralChangeTester emfFormsStructuralChangeTester) {
66: this.emfFormsStructuralChangeTester = emfFormsStructuralChangeTester;
67: }
68:
69: /**
70: * Called by the framework when the component gets activated.
71: *
72: * @param bundleContext The {@link BundleContext}
73: */
74: @Activate
75: protected void activate(BundleContext bundleContext) {
76: this.bundleContext = bundleContext;
77: }
78:
79: /**
80: * Called by the framework when the component gets deactivated.
81: *
82: * @param bundleContext The {@link BundleContext}
83: */
84: @Deactivate
85: protected void deactivate(BundleContext bundleContext) {
86:• if (emfFormsStructuralChangeTesterServiceReference != null) {
87: bundleContext.ungetService(emfFormsStructuralChangeTesterServiceReference);
88: emfFormsStructuralChangeTester = null;
89: }
90: }
91:
92: /**
93: * {@inheritDoc}
94: *
95: * @see org.eclipse.emfforms.spi.core.services.structuralchange.StructuralChangeTesterInternal#isApplicable(org.eclipse.emf.ecp.view.spi.model.VDomainModelReference)
96: */
97: @Override
98: public double isApplicable(VDomainModelReference reference) {
99: Assert.create(reference).notNull();
100:• if (reference instanceof VKeyAttributeDomainModelReference) {
101: return 5d;
102: }
103: return NOT_APPLICABLE;
104: }
105:
106: /**
107: * {@inheritDoc}
108: *
109: * @see org.eclipse.emfforms.spi.core.services.structuralchange.StructuralChangeTesterInternal#isStructureChanged(org.eclipse.emf.ecp.view.spi.model.VDomainModelReference,
110: * org.eclipse.emf.ecore.EObject, org.eclipse.emf.ecp.view.spi.model.ModelChangeNotification)
111: */
112: @Override
113: public boolean isStructureChanged(VDomainModelReference reference, EObject domainRootObject,
114: ModelChangeNotification notification) {
115: Assert.create(reference).notNull();
116: Assert.create(domainRootObject).notNull();
117: Assert.create(notification).notNull();
118:
119:• if (notification.getRawNotification().isTouch()) {
120: return false;
121: }
122:
123: final VKeyAttributeDomainModelReference keyAttributeDMR = VKeyAttributeDomainModelReference.class
124: .cast(reference);
125:
126: boolean relevantChange = false;
127: EObject lastResolvedEObject = domainRootObject;
128:• for (final EReference eReference : keyAttributeDMR.getDomainModelEReferencePath()) {
129:• if (lastResolvedEObject == null) {
130: return false;
131: }
132:• relevantChange |= eReference.equals(notification.getStructuralFeature())
133:• && lastResolvedEObject == notification.getNotifier();
134:• if (relevantChange) {
135: return true;
136: }
137: lastResolvedEObject = (EObject) lastResolvedEObject.eGet(eReference);
138: }
139:
140: @SuppressWarnings("unchecked")
141: final EList<EObject> list = (EList<EObject>) lastResolvedEObject.eGet(keyAttributeDMR.getDomainModelEFeature());
142:
143: EObject keyEObject = null;
144: // If it exists, find the EObject that contains the key.
145:• for (int i = 0; i < list.size(); i++) {
146: final EObject eObject = list.get(i);
147: Setting setting;
148: try {
149: setting = emfFormsDatabindingEMF.getSetting(keyAttributeDMR.getKeyDMR(), eObject);
150: } catch (final DatabindingFailedException ex) {
151: // TODO report needed?
152: continue;
153: }
154:
155:• if (isRelevantKeyChange(keyAttributeDMR, setting, notification)) {
156: return true;
157: }
158:• if (keyAttributeDMR.getKeyValue().equals(setting.get(true))) {
159: // key was present in the current EObject
160: keyEObject = eObject;
161: }
162: }
163:
164:• if (keyEObject != null) {
165: relevantChange = getEMFFormsStructuralChangeTester().isStructureChanged(keyAttributeDMR.getValueDMR(),
166: keyEObject, notification);
167:
168: }
169: return relevantChange;
170: }
171:
172: /**
173: * Checks whether the given key setting was changed in a relevant way.
174: *
175: * @param keyAttributeDMR The {@link VKeyAttributeDomainModelReference} that defines the key
176: * @param setting The key {@link Setting}
177: * @param notification The {@link ModelChangeNotification} indicating the change
178: * @return whether the given key setting was changed in a relevant way
179: */
180: private boolean isRelevantKeyChange(final VKeyAttributeDomainModelReference keyAttributeDMR, Setting setting,
181: ModelChangeNotification notification) {
182: final Object keyValue = keyAttributeDMR.getKeyValue();
183:• if (notification.getStructuralFeature().equals(setting.getEStructuralFeature())
184:• && notification.getNotifier().equals(setting.getEObject())) {
185: // a key was changed
186:• if (keyValue.equals(notification.getRawNotification().getOldValue())
187:• || keyValue.equals(notification.getRawNotification().getNewValue())) {
188: // The key change was significant.
189: return true;
190: }
191: }
192: return false;
193: }
194:
195: /**
196: * Returns the {@link EMFFormsStructuralChangeTester}. It is not set by the OSGI framework to avoid circular
197: * dependencies.
198: *
199: * @return The {@link EMFFormsStructuralChangeTester}
200: */
201: private EMFFormsStructuralChangeTester getEMFFormsStructuralChangeTester() {
202:• if (emfFormsStructuralChangeTester == null) {
203: emfFormsStructuralChangeTesterServiceReference = bundleContext
204: .getServiceReference(EMFFormsStructuralChangeTester.class);
205:• if (emfFormsStructuralChangeTesterServiceReference == null) {
206: throw new IllegalStateException("No EMFFormsStructuralChangeTester available!"); //$NON-NLS-1$
207: }
208: emfFormsStructuralChangeTester = bundleContext.getService(emfFormsStructuralChangeTesterServiceReference);
209: }
210: return emfFormsStructuralChangeTester;
211: }
212: }