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Package: MappedSetting
MappedSetting
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| MappedSetting(EObject, EStructuralFeature, EClass) |
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| checkMapType(EStructuralFeature) |
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| checkStructuralFeature(EStructuralFeature) |
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| get(boolean) |
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| getEObject() |
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| getEStructuralFeature() |
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| isSet() |
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| set(Object) |
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| unset() |
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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.mapping;
15:
16: import org.eclipse.emf.common.util.EMap;
17: import org.eclipse.emf.ecore.EClass;
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.EStructuralFeature.Setting;
22:
23: /**
24: * A {@link MappedSetting} is a {@link Setting} whose {@link EStructuralFeature} is a map which has {@link EClass
25: * EClasses} as its keys. Additionally, the setting contains an {@link EClass} that defines which value of the map is
26: * the value of the setting.
27: *
28: * @author Lucas Koehler
29: *
30: */
31: public class MappedSetting implements Setting {
32:
33: private final EObject eObject;
34: private final EStructuralFeature eStructuralFeature;
35: private final EClass mappedEClass;
36: private final EMap<EClass, Object> map;
37:
38: /**
39: * Creates a new {@link MappedSetting}.
40: *
41: * @param eObject The {@link EObject} holding a map
42: * @param eStructuralFeature The specific feature holding a map
43: * @param mappedEClass The EClass that defines which map entry's value is the value of this {@link Setting}.
44: * @throws IllegalMapTypeException If the structural feature does not describe a valid map.
45: */
46: @SuppressWarnings("unchecked")
47: public MappedSetting(EObject eObject, EStructuralFeature eStructuralFeature, EClass mappedEClass)
48: throws IllegalMapTypeException {
49: checkMapType(eStructuralFeature);
50:
51: this.eObject = eObject;
52: this.eStructuralFeature = eStructuralFeature;
53: this.mappedEClass = mappedEClass;
54: map = (EMap<EClass, Object>) eObject.eGet(eStructuralFeature);
55: }
56:
57: @Override
58: public EObject getEObject() {
59: return eObject;
60: }
61:
62: @Override
63: public EStructuralFeature getEStructuralFeature() {
64: return eStructuralFeature;
65: }
66:
67: @Override
68: public Object get(boolean resolve) {
69: // Always resolved => ignore the parameter
70: return map.get(mappedEClass);
71: }
72:
73: @Override
74: public void set(Object newValue) {
75: map.put(mappedEClass, newValue);
76: }
77:
78: @Override
79: public boolean isSet() {
80:• return map.get(mappedEClass) != null ? true : false;
81: }
82:
83: @Override
84: public void unset() {
85: map.removeKey(mappedEClass);
86: }
87:
88: /**
89: * Checks whether the given structural feature references a proper map.
90: *
91: * @param structuralFeature The feature to check
92: * @throws IllegalMapTypeException if the structural feature doesn't reference a proper map.
93: */
94: private void checkMapType(EStructuralFeature structuralFeature) throws IllegalMapTypeException {
95: checkStructuralFeature(structuralFeature);
96:
97: final EClass eClass = (EClass) structuralFeature.getEType();
98: final EStructuralFeature keyFeature = eClass.getEStructuralFeature("key"); //$NON-NLS-1$
99: final EStructuralFeature valueFeature = eClass.getEStructuralFeature("value"); //$NON-NLS-1$
100:• if (keyFeature == null || valueFeature == null) {
101: throw new IllegalMapTypeException(
102: "The given structural feature must reference a map."); //$NON-NLS-1$
103: }
104:• if (!EReference.class.isInstance(keyFeature)) {
105: throw new IllegalMapTypeException(
106: "The keys of the map referenced by the given structural feature must be referenced EClasses."); //$NON-NLS-1$
107: }
108:• if (!EClass.class.isAssignableFrom(((EReference) keyFeature).getEReferenceType().getInstanceClass())) {
109: throw new IllegalMapTypeException(
110: "The keys of the map referenced by the given structural feature must be referenced EClasses."); //$NON-NLS-1$
111: }
112: }
113:
114: /**
115: * Checks basic required properties of the given {@link EStructuralFeature}.
116: *
117: * @param structuralFeature The {@link EStructuralFeature} to check
118: * @throws IllegalMapTypeException if something's wrong with the feature
119: */
120: private void checkStructuralFeature(EStructuralFeature structuralFeature) throws IllegalMapTypeException {
121:• if (structuralFeature.getEType() == null) {
122: throw new IllegalMapTypeException(
123: "The EType of the given structural feature was null."); //$NON-NLS-1$
124: }
125:• if (structuralFeature.getEType().getInstanceClassName() == null) {
126: throw new IllegalMapTypeException(
127: "The InstanceClassName of the given structural feature's EType was null."); //$NON-NLS-1$
128: }
129:• if (!structuralFeature.getEType().getInstanceClassName().equals("java.util.Map$Entry")) { //$NON-NLS-1$
130: throw new IllegalMapTypeException(
131: "The given structural feature must reference a map."); //$NON-NLS-1$
132: }
133:• if (structuralFeature.getLowerBound() != 0 || structuralFeature.getUpperBound() != -1) {
134: throw new IllegalMapTypeException(
135: "The given structural feature must reference a map."); //$NON-NLS-1$
136: }
137: }
138: }