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Package: CompositeConditionService
CompositeConditionService
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| CompositeConditionService() |
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| deactivate() |
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| evaluate(Condition, EObject) |
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| evaluateChangedValues(Condition, EObject, Map) |
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| getBundleContext() |
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| getConditionServiceManager() |
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| getConditionSettings(Condition, EObject) |
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| getDomainModelReferences(Condition) |
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| getTargets(Condition, EObject) |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2017 Christian W. Damus 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: * Christian W. Damus - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emf.ecp.view.internal.rule;
15:
16: import java.util.Collections;
17: import java.util.LinkedHashSet;
18: import java.util.List;
19: import java.util.Map;
20: import java.util.Set;
21:
22: import org.eclipse.emf.ecore.EObject;
23: import org.eclipse.emf.ecore.EStructuralFeature.Setting;
24: import org.eclipse.emf.ecp.common.spi.UniqueSetting;
25: import org.eclipse.emf.ecp.view.spi.model.VDomainModelReference;
26: import org.eclipse.emf.ecp.view.spi.rule.ConditionService;
27: import org.eclipse.emf.ecp.view.spi.rule.model.Condition;
28: import org.osgi.framework.BundleContext;
29: import org.osgi.framework.FrameworkUtil;
30: import org.osgi.framework.ServiceReference;
31: import org.osgi.service.component.annotations.Deactivate;
32:
33: /**
34: * Partial implementation of a condition service for composite conditions.
35: *
36: * @param <C> the type of condition for which I provide service
37: *
38: * @author Christian W. Damus
39: */
40: abstract class CompositeConditionService<C extends Condition> implements ConditionService<C> {
41:
42: private ServiceReference<ConditionServiceManager> conditionServiceManagerReference;
43: private ConditionServiceManager conditionServiceManager;
44:
45: /**
46: * Initializes me.
47: */
48: protected CompositeConditionService() {
49: super();
50: }
51:
52: /**
53: * Deactivates me.
54: */
55: @Deactivate
56: void deactivate() {
57: conditionServiceManager = null;
58:• if (conditionServiceManagerReference != null) {
59: getBundleContext().ungetService(conditionServiceManagerReference);
60: }
61: }
62:
63: private BundleContext getBundleContext() {
64: return FrameworkUtil.getBundle(getClass()).getBundleContext();
65: }
66:
67: @Override
68: public Set<UniqueSetting> getConditionSettings(C condition, EObject domainModel) {
69: final Set<UniqueSetting> result = new LinkedHashSet<UniqueSetting>();
70: final ConditionServiceManager manager = getConditionServiceManager();
71: final Iterable<? extends EObject> targets = getTargets(condition, domainModel);
72:
73:• for (final Condition component : components(condition)) {
74:• for (final EObject next : targets) {
75: result.addAll(manager.getConditionSettings(component, next));
76: }
77: }
78:
79: return result;
80: }
81:
82: /**
83: * Obtains the objects on which a {@code condition} is evaluated.
84: *
85: * @param condition a composite condition of my type
86: * @param domainModel the source from which to navigate to obtain the targets for evaluation
87: * of the {@code condition}
88: * @return the evaluation targets
89: */
90: protected List<? extends EObject> getTargets(C condition, EObject domainModel) {
91: return Collections.singletonList(domainModel);
92: }
93:
94: /**
95: * Obtains the nested conditions in a composite {@code condition} of my type.
96: *
97: * @param condition the composite condition from which to get components
98: * @return the {@code condition}'s zero or more nested conditions that are its components
99: */
100: protected abstract Iterable<? extends Condition> components(C condition);
101:
102: @Override
103: public Set<VDomainModelReference> getDomainModelReferences(C condition) {
104: final Set<VDomainModelReference> result = new LinkedHashSet<VDomainModelReference>();
105: final ConditionServiceManager manager = getConditionServiceManager();
106:
107:• for (final Condition next : components(condition)) {
108: result.addAll(manager.getDomainModelReferences(next));
109: }
110:
111: return result;
112: }
113:
114: @Override
115: public boolean evaluate(C condition, EObject domainModel) {
116: return condition.evaluate(domainModel);
117: }
118:
119: @Override
120: public boolean evaluateChangedValues(C condition, EObject domainModel, Map<Setting, Object> possibleNewValues) {
121: return condition.evaluateChangedValues(domainModel, possibleNewValues);
122: }
123:
124: private ConditionServiceManager getConditionServiceManager() {
125:• if (conditionServiceManager == null) {
126: final BundleContext context = getBundleContext();
127: conditionServiceManagerReference = context.getServiceReference(ConditionServiceManager.class);
128:• if (conditionServiceManagerReference == null) {
129: throw new IllegalStateException("No ConditionServiceManager"); //$NON-NLS-1$
130: }
131: conditionServiceManager = context.getService(conditionServiceManagerReference);
132: }
133: return conditionServiceManager;
134: }
135:
136: }