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Package: FeatureSegmentExpander
FeatureSegmentExpander
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| FeatureSegmentExpander() |
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| isApplicable(VDomainModelReferenceSegment) |
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| needsToExpandLastSegment() |
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| prepareDomainObject(VDomainModelReferenceSegment, EObject) |
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| setReportService(ReportService) |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2018 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.segments.featurepath;
15:
16: import java.util.Optional;
17:
18: import org.eclipse.emf.ecore.EObject;
19: import org.eclipse.emf.ecore.EReference;
20: import org.eclipse.emf.ecore.EStructuralFeature;
21: import org.eclipse.emf.ecore.util.EcoreUtil;
22: import org.eclipse.emf.ecp.common.spi.asserts.Assert;
23: import org.eclipse.emf.ecp.view.spi.model.VDomainModelReferenceSegment;
24: import org.eclipse.emf.ecp.view.spi.model.VFeatureDomainModelReferenceSegment;
25: import org.eclipse.emfforms.spi.common.report.AbstractReport;
26: import org.eclipse.emfforms.spi.common.report.ReportService;
27: import org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDMRSegmentExpander;
28: import org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsExpandingFailedException;
29: import org.osgi.service.component.annotations.Component;
30: import org.osgi.service.component.annotations.Reference;
31:
32: /**
33: * A {@link EMFFormsDMRSegmentExpander} for {@link VFeatureDomainModelReferenceSegment
34: * VFeatureDomainModelReferenceSegments}.
35: *
36: * @author Lucas Koehler
37: *
38: */
39: @Component(name = "FeatureSegmentExpander")
40: public class FeatureSegmentExpander implements EMFFormsDMRSegmentExpander {
41:
42: private ReportService reportService;
43:
44: /**
45: * Called by the framework to set the {@link ReportService}.
46: *
47: * @param reportService The {@link ReportService}
48: */
49: @Reference(unbind = "-")
50: protected void setReportService(ReportService reportService) {
51: this.reportService = reportService;
52:
53: }
54:
55: /**
56: * {@inheritDoc}
57: *
58: * @see org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDMRSegmentExpander#prepareDomainObject(org.eclipse.emf.ecp.view.spi.model.VDomainModelReferenceSegment,
59: * org.eclipse.emf.ecore.EObject)
60: */
61: @Override
62: public Optional<EObject> prepareDomainObject(VDomainModelReferenceSegment segment, EObject domainObject)
63: throws EMFFormsExpandingFailedException {
64: Assert.create(segment).notNull();
65: Assert.create(domainObject).notNull();
66: Assert.create(segment).ofClass(VFeatureDomainModelReferenceSegment.class);
67:
68: final VFeatureDomainModelReferenceSegment featureSegment = (VFeatureDomainModelReferenceSegment) segment;
69: final EStructuralFeature structuralFeature = domainObject.eClass()
70: .getEStructuralFeature(featureSegment.getDomainModelFeature());
71:
72:• if (structuralFeature == null) {
73: throw new EMFFormsExpandingFailedException(
74: String.format("The given domain object does not contain the segment's feature. " //$NON-NLS-1$
75: + "The segment was %1$s. The domain object was %2$s.", segment, domainObject)); //$NON-NLS-1$
76: }
77:• if (!EReference.class.isInstance(structuralFeature)) {
78: throw new EMFFormsExpandingFailedException(
79: String.format("The feature described by the given segment must be an EReference. " //$NON-NLS-1$
80: + "The segment was %1$s.", segment)); //$NON-NLS-1$
81: }
82:
83: final EReference reference = (EReference) structuralFeature;
84:
85: /*
86: * If the reference's target already exists, we do not need to do anything.
87: * Otherwise we have to create a new instance.
88: */
89: EObject child = (EObject) domainObject.eGet(reference);
90:• if (child == null) {
91:• if (!reference.getEReferenceType().isAbstract() && !reference.getEReferenceType().isInterface()) {
92: child = EcoreUtil.create(reference.getEReferenceType());
93: domainObject.eSet(reference, child);
94: } else {
95: throw new EMFFormsExpandingFailedException(String.format(
96: "The reference type of the segment's feature is either abstract or an interface. " //$NON-NLS-1$
97: + "Therefore, no instance can be created. The segment was %1$s.", //$NON-NLS-1$
98: segment));
99: }
100: }
101:
102: return Optional.ofNullable(child);
103: }
104:
105: /**
106: * {@inheritDoc}
107: *
108: * @see org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDMRSegmentExpander#isApplicable(org.eclipse.emf.ecp.view.spi.model.VDomainModelReferenceSegment)
109: */
110: @Override
111: public double isApplicable(VDomainModelReferenceSegment segment) {
112:• if (segment == null) {
113: reportService.report(new AbstractReport("Warning: The given domain model reference segment was null.")); //$NON-NLS-1$
114: return NOT_APPLICABLE;
115: }
116:• if (VFeatureDomainModelReferenceSegment.class.isInstance(segment)) {
117: return 1d;
118: }
119: return NOT_APPLICABLE;
120: }
121:
122: /**
123: * {@inheritDoc}
124: *
125: * @see org.eclipse.emfforms.spi.core.services.domainexpander.EMFFormsDMRSegmentExpander#needsToExpandLastSegment()
126: */
127: @Override
128: public boolean needsToExpandLastSegment() {
129: return false;
130: }
131:
132: }