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Package: ViewProviderImpl
ViewProviderImpl
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| ViewProviderImpl() |
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| activate() |
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| addProvider(IViewProvider) |
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| getView(EObject, VViewModelProperties, Collection) |
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| loadClass(String, String) |
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| readViewProviders() |
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| removeProvider(IViewProvider) |
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| report(AbstractReport) |
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| setReportService(ReportService) |
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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: * Eugen Neufeld - initial API and implementation
13: * Edgar Mueller - refactorings
14: * Christian W. Damus - bug 547787
15: ******************************************************************************/
16: package org.eclipse.emf.ecp.view.internal.provider;
17:
18: import java.lang.reflect.Constructor;
19: import java.lang.reflect.InvocationTargetException;
20: import java.util.Collection;
21: import java.util.Set;
22: import java.util.concurrent.CopyOnWriteArraySet;
23:
24: import org.eclipse.core.runtime.IConfigurationElement;
25: import org.eclipse.core.runtime.Platform;
26: import org.eclipse.emf.ecore.EObject;
27: import org.eclipse.emf.ecp.view.spi.model.VView;
28: import org.eclipse.emf.ecp.view.spi.model.VViewFactory;
29: import org.eclipse.emf.ecp.view.spi.model.VViewModelProperties;
30: import org.eclipse.emf.ecp.view.spi.provider.EMFFormsFilteredViewService;
31: import org.eclipse.emf.ecp.view.spi.provider.EMFFormsViewService;
32: import org.eclipse.emf.ecp.view.spi.provider.IFilteredViewProvider;
33: import org.eclipse.emf.ecp.view.spi.provider.IViewProvider;
34: import org.eclipse.emf.ecp.view.spi.provider.reporting.NoViewProviderFoundReport;
35: import org.eclipse.emf.ecp.view.spi.provider.reporting.ViewModelIsNullReport;
36: import org.eclipse.emf.ecp.view.spi.provider.reporting.ViewProviderInitFailedReport;
37: import org.eclipse.emfforms.spi.common.report.AbstractReport;
38: import org.eclipse.emfforms.spi.common.report.ReportService;
39: import org.osgi.framework.Bundle;
40: import org.osgi.service.component.annotations.Activate;
41: import org.osgi.service.component.annotations.Component;
42: import org.osgi.service.component.annotations.Reference;
43: import org.osgi.service.component.annotations.ReferenceCardinality;
44: import org.osgi.service.component.annotations.ReferencePolicy;
45:
46: /**
47: * Implementation of the {@link EMFFormsViewService} which collects all known {@link IViewProvider} and finds the best
48: * fitting view.
49: *
50: * @author Eugen Neufeld
51: */
52: @Component(name = "EMFFormsViewService", service = { EMFFormsViewService.class, EMFFormsFilteredViewService.class })
53: public class ViewProviderImpl implements EMFFormsFilteredViewService {
54:
55: private static final String CLASS_CANNOT_BE_RESOLVED = "%1$s cannot be loaded because bundle %2$s cannot be resolved."; //$NON-NLS-1$
56: private static final String CLASS = "class"; //$NON-NLS-1$
57: private static final String EXTENSION_POINT_ID = "org.eclipse.emf.ecp.ui.view.viewModelProviders"; //$NON-NLS-1$
58: private final Set<IFilteredViewProvider> viewProviders = new CopyOnWriteArraySet<IFilteredViewProvider>();
59: private ReportService reportService;
60:
61: /**
62: * Component activate method.
63: */
64: @Activate
65: protected void activate() {
66: readViewProviders();
67: }
68:
69: private void readViewProviders() {
70: final IConfigurationElement[] controls = Platform.getExtensionRegistry()
71: .getConfigurationElementsFor(
72: EXTENSION_POINT_ID);
73:
74:• for (final IConfigurationElement e : controls) {
75: try {
76: final String clazz = e.getAttribute(CLASS);
77: final Class<? extends IViewProvider> resolvedClass = loadClass(e
78: .getContributor().getName(), clazz);
79: final Constructor<? extends IViewProvider> controlConstructor = resolvedClass
80: .getConstructor();
81: final IViewProvider viewProvider = controlConstructor.newInstance();
82: viewProviders.add(FilteredViewProviderAdapter.adapt(viewProvider));
83: } catch (final ClassNotFoundException ex) {
84: report(new ViewProviderInitFailedReport(ex));
85: } catch (final NoSuchMethodException ex) {
86: report(new ViewProviderInitFailedReport(ex));
87: } catch (final SecurityException ex) {
88: report(new ViewProviderInitFailedReport(ex));
89: } catch (final InstantiationException ex) {
90: report(new ViewProviderInitFailedReport(ex));
91: } catch (final IllegalAccessException ex) {
92: report(new ViewProviderInitFailedReport(ex));
93: } catch (final IllegalArgumentException ex) {
94: report(new ViewProviderInitFailedReport(ex));
95: } catch (final InvocationTargetException ex) {
96: report(new ViewProviderInitFailedReport(ex));
97: }
98: }
99: }
100:
101: private void report(AbstractReport reportEntity) {
102: reportService.report(reportEntity);
103: }
104:
105: @SuppressWarnings("unchecked")
106: private static <T> Class<T> loadClass(String bundleName, String clazz)
107: throws ClassNotFoundException {
108: final Bundle bundle = Platform.getBundle(bundleName);
109:• if (bundle == null) {
110: throw new ClassNotFoundException(String.format(
111: CLASS_CANNOT_BE_RESOLVED, clazz, bundleName));
112: }
113: return (Class<T>) bundle.loadClass(clazz);
114:
115: }
116:
117: @Override
118: public VView getView(EObject object, VViewModelProperties properties, Collection<String> requiredKeys) {
119: VView result = null;
120:
121:• if (viewProviders.isEmpty()) {
122: report(new NoViewProviderFoundReport());
123: return result;
124: }
125:
126: double highestPrio = IViewProvider.NOT_APPLICABLE;
127: IFilteredViewProvider selectedProvider = null;
128:• if (properties == null) {
129: properties = VViewFactory.eINSTANCE.createViewModelLoadingProperties();
130: }
131:
132:• for (final IFilteredViewProvider viewProvider : viewProviders) {
133: final double prio = viewProvider.canProvideViewModel(object, properties, requiredKeys);
134:• if (prio > highestPrio) {
135: highestPrio = prio;
136: selectedProvider = viewProvider;
137: }
138: }
139:
140:• if (selectedProvider != null) {
141: result = selectedProvider.provideViewModel(object, properties, requiredKeys);
142:• if (result == null) {
143: report(new ViewModelIsNullReport());
144: }
145: }
146:
147: return result;
148: }
149:
150: @Reference(cardinality = ReferenceCardinality.MULTIPLE, policy = ReferencePolicy.DYNAMIC)
151: @Override
152: public void addProvider(IViewProvider viewProvider) {
153: viewProviders.add(FilteredViewProviderAdapter.adapt(viewProvider));
154: }
155:
156: @Override
157: public void removeProvider(IViewProvider viewProvider) {
158: final IFilteredViewProvider filtered = FilteredViewProviderAdapter.adapt(viewProvider);
159: viewProviders.remove(filtered);
160: FilteredViewProviderAdapter.dispose(filtered);
161: }
162:
163: /**
164: * Set the ReportService.
165: *
166: * @param reportService The {@link ReportService}
167: */
168: @Reference(cardinality = ReferenceCardinality.MANDATORY, policy = ReferencePolicy.STATIC, unbind = "-")
169: protected void setReportService(ReportService reportService) {
170: this.reportService = reportService;
171: }
172:
173: }