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Package: DelegatingDmrSegmentConverter$2
DelegatingDmrSegmentConverter$2
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2019 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.swt.internal.reference.table;
15:
16: import java.util.List;
17: import java.util.function.Function;
18:
19: import org.eclipse.core.databinding.observable.Realm;
20: import org.eclipse.core.databinding.observable.list.IObservableList;
21: import org.eclipse.core.databinding.observable.list.ListDiff;
22: import org.eclipse.core.databinding.observable.value.IObservableValue;
23: import org.eclipse.core.databinding.property.list.DelegatingListProperty;
24: import org.eclipse.core.databinding.property.list.IListProperty;
25: import org.eclipse.core.databinding.property.value.DelegatingValueProperty;
26: import org.eclipse.core.databinding.property.value.IValueProperty;
27: import org.eclipse.emf.databinding.EMFProperties;
28: import org.eclipse.emf.databinding.IEMFListProperty;
29: import org.eclipse.emf.databinding.IEMFValueProperty;
30: import org.eclipse.emf.databinding.internal.EMFListPropertyDecorator;
31: import org.eclipse.emf.databinding.internal.EMFValuePropertyDecorator;
32: import org.eclipse.emf.ecore.EClass;
33: import org.eclipse.emf.ecore.EObject;
34: import org.eclipse.emf.ecore.EReference;
35: import org.eclipse.emf.ecore.EStructuralFeature;
36: import org.eclipse.emf.ecore.EStructuralFeature.Setting;
37: import org.eclipse.emf.ecore.InternalEObject;
38: import org.eclipse.emf.ecp.view.spi.model.VDomainModelReferenceSegment;
39: import org.eclipse.emf.ecp.view.spi.model.VFeatureDomainModelReferenceSegment;
40: import org.eclipse.emf.edit.domain.EditingDomain;
41: import org.eclipse.emfforms.internal.core.services.databinding.SegmentConverterListResultImpl;
42: import org.eclipse.emfforms.internal.core.services.databinding.SegmentConverterValueResultImpl;
43: import org.eclipse.emfforms.spi.core.services.databinding.DatabindingFailedException;
44: import org.eclipse.emfforms.spi.core.services.databinding.emf.DomainModelReferenceSegmentConverterEMF;
45: import org.eclipse.emfforms.spi.core.services.databinding.emf.SegmentConverterListResultEMF;
46: import org.eclipse.emfforms.spi.core.services.databinding.emf.SegmentConverterValueResultEMF;
47:
48: /**
49: * Converter for a DMR Segment that needs to be delegated to another object than the
50: * source on which it is being accessed.
51: *
52: * @author Lucas Koehler
53: *
54: */
55: @SuppressWarnings({ "unchecked", "rawtypes", "restriction" }) // EMF APIs are provisional
56: class DelegatingDmrSegmentConverter implements DomainModelReferenceSegmentConverterEMF {
57:
58: private final VFeatureDomainModelReferenceSegment segment;
59: private final EStructuralFeature segmentFeature;
60: private final Function<? super EObject, ?> delegator;
61:
62: /**
63: * Default constructor.
64: *
65: * @param segment The {@link VDomainModelReferenceSegment} this segment converter is applicable for
66: * @param segmentFeature The {@link EStructuralFeature} of the segment
67: * @param delegator mapping of source object to the object to which to delegate access
68: * to the segment
69: */
70: DelegatingDmrSegmentConverter(VFeatureDomainModelReferenceSegment segment, EStructuralFeature segmentFeature,
71: Function<? super EObject, ?> delegator) {
72: this.segment = segment;
73: this.segmentFeature = segmentFeature;
74: this.delegator = delegator;
75: }
76:
77: @Override
78: public double isApplicable(VDomainModelReferenceSegment segment) {
79: return segment == this.segment ? Double.POSITIVE_INFINITY : NOT_APPLICABLE;
80: }
81:
82: @Override
83: public SegmentConverterValueResultEMF convertToValueProperty(VDomainModelReferenceSegment segment,
84: EClass segmentRoot, EditingDomain editingDomain) throws DatabindingFailedException {
85: final EClass nextEClass = segmentFeature instanceof EReference
86: ? EReference.class.cast(segmentFeature).getEReferenceType()
87: : null;
88: return new SegmentConverterValueResultImpl(valueDecorator(), nextEClass);
89: }
90:
91: private IEMFValueProperty valueDecorator() {
92: final EStructuralFeature feature = segmentFeature;
93: final IValueProperty property = EMFProperties.value(feature);
94:
95: return new EMFValuePropertyDecorator(new DelegatingValueProperty(feature) {
96: @Override
97: protected IValueProperty doGetDelegate(Object source) {
98: return property;
99: }
100:
101: Object substitute(Object source) {
102: return delegator.apply((EObject) source);
103: }
104:
105: @Override
106: protected Object doGetValue(Object source) {
107: return super.doGetValue(substitute(source));
108: }
109:
110: @Override
111: protected void doSetValue(Object source, Object value) {
112: super.doSetValue(substitute(source), value);
113: }
114:
115: @Override
116: public IObservableValue observe(Object source) {
117: return super.observe(substitute(source));
118: }
119:
120: @Override
121: public IObservableValue observe(Realm realm, Object source) {
122: return super.observe(realm, substitute(source));
123: }
124: }, feature);
125: }
126:
127: @Override
128: public SegmentConverterListResultEMF convertToListProperty(VDomainModelReferenceSegment segment, EClass segmentRoot,
129: EditingDomain editingDomain) throws DatabindingFailedException {
130: final EClass nextEClass = segmentFeature instanceof EReference
131: ? EReference.class.cast(segmentFeature).getEReferenceType()
132: : null;
133: return new SegmentConverterListResultImpl(listDecorator(), nextEClass);
134: }
135:
136: private IEMFListProperty listDecorator() {
137:
138: final EStructuralFeature feature = segmentFeature;
139: final IListProperty property = EMFProperties.list(feature);
140:
141: // BEGIN COMPLEX CODE
142: return new EMFListPropertyDecorator(new DelegatingListProperty(feature) {
143: @Override
144: protected IListProperty doGetDelegate(Object source) {
145: return property;
146: }
147:
148: Object substitute(Object source) {
149: return delegator.apply((EObject) source);
150: }
151:
152: @Override
153: protected List doGetList(Object source) {
154: return super.doGetList(substitute(source));
155: }
156:
157: @Override
158: protected void doSetList(Object source, List list) {
159: super.doSetList(substitute(source), list);
160: }
161:
162: @Override
163: protected void doUpdateList(Object source, ListDiff diff) {
164: super.doUpdateList(substitute(source), diff);
165: }
166:
167: @Override
168: public IObservableList observe(Object source) {
169: return super.observe(substitute(source));
170: }
171:
172: @Override
173: public IObservableList observe(Realm realm, Object source) {
174: return super.observe(realm, substitute(source));
175: }
176: }, feature);
177: }
178:
179: @Override
180: public Setting getSetting(VDomainModelReferenceSegment segment, EObject eObject) throws DatabindingFailedException {
181: return ((InternalEObject) delegator.apply(eObject)).eSetting(segmentFeature);
182: }
183: }