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Package: EMFFormsKeyAttributeDMRExpander
EMFFormsKeyAttributeDMRExpander
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| EMFFormsKeyAttributeDMRExpander() |
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| activate(BundleContext) |
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| checkListType(EStructuralFeature) |
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| deactivate(BundleContext) |
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| getEMFFormsDomainExpander() |
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| isApplicable(VDomainModelReference) |
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| prepareDomainObject(VDomainModelReference, EObject) |
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| setEMFFormsDatabinding(EMFFormsDatabinding) |
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| setEMFFormsDomainExpander(EMFFormsDomainExpander) |
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| setReportService(ReportService) |
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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.domainexpander.keyattribute;
15:
16: import java.util.List;
17:
18: import org.eclipse.core.databinding.property.value.IValueProperty;
19: import org.eclipse.emf.ecore.EObject;
20: import org.eclipse.emf.ecore.EReference;
21: import org.eclipse.emf.ecore.EStructuralFeature;
22: import org.eclipse.emf.ecp.common.spi.asserts.Assert;
23: import org.eclipse.emf.ecp.view.spi.keyattributedmr.model.VKeyAttributeDomainModelReference;
24: import org.eclipse.emf.ecp.view.spi.model.VDomainModelReference;
25: import org.eclipse.emf.ecp.view.spi.model.VFeaturePathDomainModelReference;
26: import org.eclipse.emf.ecp.view.spi.model.VViewFactory;
27: import org.eclipse.emfforms.spi.common.report.AbstractReport;
28: import org.eclipse.emfforms.spi.common.report.ReportService;
29: import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
30: import org.eclipse.emfforms.spi.core.services.databinding.EMFFormsDatabinding;
31: import org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDMRExpander;
32: import org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDomainExpander;
33: import org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsExpandingFailedException;
34: import org.osgi.framework.BundleContext;
35: import org.osgi.framework.ServiceReference;
36: import org.osgi.service.component.annotations.Activate;
37: import org.osgi.service.component.annotations.Component;
38: import org.osgi.service.component.annotations.Deactivate;
39: import org.osgi.service.component.annotations.Reference;
40:
41: /**
42: * An {@link EMFFormsDMRExpander} for {@link VKeyAttributeDomainModelReference VKeyAttributeDomainModelReferences}.
43: *
44: * @author Lucas Koehler
45: *
46: */
47: @Component(name = "EMFFormsKeyAttributeDMRExpander")
48: public class EMFFormsKeyAttributeDMRExpander implements EMFFormsDMRExpander {
49:
50: private ReportService reportService;
51: private EMFFormsDomainExpander domainExpander;
52: private EMFFormsDatabinding databindingService;
53: private BundleContext bundleContext;
54: private ServiceReference<EMFFormsDomainExpander> emfFormsDomainExpanderServiceReference;
55:
56: /**
57: * Called by the framework to set the {@link ReportService}.
58: *
59: * @param reportService The {@link ReportService}
60: */
61: @Reference(unbind = "-")
62: protected void setReportService(ReportService reportService) {
63: this.reportService = reportService;
64:
65: }
66:
67: /**
68: * Called by the framework when the component gets activated.
69: *
70: * @param bundleContext The {@link BundleContext}
71: */
72: @Activate
73: protected void activate(BundleContext bundleContext) {
74: this.bundleContext = bundleContext;
75: }
76:
77: /**
78: * Called by the framework when the component gets deactivated.
79: *
80: * @param bundleContext The {@link BundleContext}
81: */
82: @Deactivate
83: protected void deactivate(BundleContext bundleContext) {
84:• if (emfFormsDomainExpanderServiceReference != null) {
85: bundleContext.ungetService(emfFormsDomainExpanderServiceReference);
86: domainExpander = null;
87: }
88: }
89:
90: private EMFFormsDomainExpander getEMFFormsDomainExpander() {
91:• if (domainExpander == null) {
92: emfFormsDomainExpanderServiceReference = bundleContext.getServiceReference(EMFFormsDomainExpander.class);
93:• if (emfFormsDomainExpanderServiceReference == null) {
94: throw new IllegalStateException("No EMFFormsDomainExpander available!"); //$NON-NLS-1$
95: }
96: domainExpander = bundleContext.getService(emfFormsDomainExpanderServiceReference);
97: }
98: return domainExpander;
99: }
100:
101: /**
102: * Helper method for tests. This is quite ugly!
103: *
104: * @param domainExpander The EMFFormsDomainExpander to use
105: */
106: void setEMFFormsDomainExpander(EMFFormsDomainExpander domainExpander) {
107: this.domainExpander = domainExpander;
108: }
109:
110: /**
111: * Called by the framework to set the {@link EMFFormsDatabinding}.
112: *
113: * @param emfFormsDatabinding The {@link EMFFormsDatabinding}
114: */
115: @Reference(unbind = "-")
116: protected void setEMFFormsDatabinding(EMFFormsDatabinding emfFormsDatabinding) {
117: databindingService = emfFormsDatabinding;
118: }
119:
120: /**
121: * {@inheritDoc}
122: *
123: * @see org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDMRExpander#prepareDomainObject(org.eclipse.emf.ecp.view.spi.model.VDomainModelReference,
124: * org.eclipse.emf.ecore.EObject)
125: */
126: @Override
127: public void prepareDomainObject(VDomainModelReference domainModelReference, EObject domainObject)
128: throws EMFFormsExpandingFailedException {
129: Assert.create(domainModelReference).notNull();
130: Assert.create(domainObject).notNull();
131: Assert.create(domainModelReference).ofClass(VKeyAttributeDomainModelReference.class);
132:
133: final VKeyAttributeDomainModelReference keyAttributeDMR = VKeyAttributeDomainModelReference.class
134: .cast(domainModelReference);
135:
136: // Create a new feature path dmr to only expand the feature path part of the key attribute dmr.
137: final VFeaturePathDomainModelReference featurePathDMR = VViewFactory.eINSTANCE
138: .createFeaturePathDomainModelReference();
139: featurePathDMR.setDomainModelEFeature(keyAttributeDMR.getDomainModelEFeature());
140: featurePathDMR.getDomainModelEReferencePath().addAll(keyAttributeDMR.getDomainModelEReferencePath());
141:
142: getEMFFormsDomainExpander().prepareDomainObject(featurePathDMR, domainObject);
143:
144: IValueProperty valueProperty;
145: try {
146: valueProperty = databindingService.getValueProperty(featurePathDMR, domainObject);
147: } catch (final DatabindingFailedException ex) {
148: throw new EMFFormsExpandingFailedException(
149: "Domain Expansion failed due to a failed databinding: " + ex.getMessage()); //$NON-NLS-1$
150: }
151:
152: final EStructuralFeature listEStructuralFeature = (EStructuralFeature) valueProperty.getValueType();
153:
154: checkListType(listEStructuralFeature);
155:
156: // need unchecked type cast because IValueProperty#getValue always returns an Object.
157: @SuppressWarnings("unchecked")
158: final List<EObject> eObjectsList = (List<EObject>) valueProperty.getValue(domainObject);
159:
160: /*
161: * Iterate over all EObjects of the list referenced by the feature path DMR part of the key attribute DMR.
162: * Check for every EObject whether the key DMR references the key value defined by the key attribute DMR.
163: * If this is the case, expand the value DMR for this EObject.
164: */
165:• for (final EObject targetDomainObject : eObjectsList) {
166: IValueProperty keyValueProperty;
167: try {
168: keyValueProperty = databindingService.getValueProperty(keyAttributeDMR.getKeyDMR(),
169: targetDomainObject);
170: } catch (final DatabindingFailedException ex) {
171: throw new EMFFormsExpandingFailedException(
172: "Domain Expansion failed due to an invalid key attribute dmr: " + ex.getMessage()); //$NON-NLS-1$
173: }
174: final Object potentialKey = keyValueProperty.getValue(targetDomainObject);
175:
176: final boolean foundKey = keyAttributeDMR.getKeyValue().equals(potentialKey);
177:• if (foundKey) {
178: domainExpander.prepareDomainObject(keyAttributeDMR.getValueDMR(), targetDomainObject);
179: }
180: }
181: }
182:
183: /**
184: * Checks whether the given structural feature references a list of {@link EObject EObjects}.
185: *
186: * @param structuralFeature The feature to check
187: * @throws EMFFormsExpandingFailedException if the structural feature doesn't reference a list of {@link EObject
188: * EObjects}.
189: */
190: private void checkListType(EStructuralFeature structuralFeature) throws EMFFormsExpandingFailedException {
191:• if (!structuralFeature.isMany()) {
192: throw new EMFFormsExpandingFailedException(
193: "The VKeyAttributeDomainModelReference's domainModelEFeature must reference a list."); //$NON-NLS-1$
194: }
195:• if (!EReference.class.isInstance(structuralFeature)) {
196: throw new EMFFormsExpandingFailedException(
197: "The VKeyAttributeDomainModelReference's domainModelEFeature must reference a list of EObjects."); //$NON-NLS-1$
198: }
199: }
200:
201: /**
202: * {@inheritDoc}
203: *
204: * @see org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDMRExpander#isApplicable(org.eclipse.emf.ecp.view.spi.model.VDomainModelReference)
205: */
206: @Override
207: public double isApplicable(VDomainModelReference domainModelReference) {
208:• if (domainModelReference == null) {
209: reportService.report(new AbstractReport("Warning: The given domain model reference was null.")); //$NON-NLS-1$
210: return NOT_APPLICABLE;
211: }
212:• if (VKeyAttributeDomainModelReference.class.isInstance(domainModelReference)) {
213: return 5d;
214: }
215: return NOT_APPLICABLE;
216: }
217:
218: }