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Package: ViewModelMigratorUtil
ViewModelMigratorUtil
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| getStringViewModelMigrator() |
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| getViewModelMigrator() |
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| getViewModelWorkspaceMigrator() |
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| loadClass(String, String) |
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| log(Throwable) |
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| readExtensionPoint() |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2015 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.emf.ecp.view.migrator;
15:
16: import org.eclipse.core.runtime.IConfigurationElement;
17: import org.eclipse.core.runtime.IExtension;
18: import org.eclipse.core.runtime.IExtensionPoint;
19: import org.eclipse.core.runtime.InvalidRegistryObjectException;
20: import org.eclipse.core.runtime.Platform;
21: import org.eclipse.emf.ecp.spi.view.migrator.string.StringViewModelMigrator;
22: import org.eclipse.emfforms.common.ServiceObjectTracker;
23: import org.eclipse.emfforms.spi.common.report.AbstractReport;
24: import org.eclipse.emfforms.spi.common.report.ReportService;
25: import org.osgi.framework.Bundle;
26: import org.osgi.framework.BundleContext;
27: import org.osgi.framework.FrameworkUtil;
28: import org.osgi.framework.ServiceReference;
29:
30: /**
31: * @author Lucas Koehler
32: *
33: */
34: public final class ViewModelMigratorUtil {
35:
36: private static final String MIGRATOR_EXTENSION = "org.eclipse.emf.ecp.view.migrator.migrators"; //$NON-NLS-1$
37: private static final String MIGRATOR_CLASS = "class"; //$NON-NLS-1$
38: private static final String MIGRATOR_PRIORITY = "priority"; //$NON-NLS-1$
39:
40: private static ViewModelMigrator migrator;
41:
42: private ViewModelMigratorUtil() {
43:
44: }
45:
46: private static void readExtensionPoint() {
47: final IExtensionPoint extensionPoint = Platform.getExtensionRegistry()
48: .getExtensionPoint(MIGRATOR_EXTENSION);
49: int topPriority = 0;
50: Class<ViewModelMigrator> topClass = null;
51:• for (final IExtension extension : extensionPoint.getExtensions()) {
52:• for (final IConfigurationElement configurationElement : extension
53: .getConfigurationElements()) {
54: try {
55:
56: final int priority = Integer.parseInt(configurationElement.getAttribute(MIGRATOR_PRIORITY));
57:• if (priority > topPriority) {
58: final Class<ViewModelMigrator> migratorClass = loadClass(configurationElement
59: .getContributor().getName(),
60: configurationElement
61: .getAttribute(MIGRATOR_CLASS));
62: topClass = migratorClass;
63: topPriority = priority;
64: }
65: } catch (final ClassNotFoundException ex) {
66: log(ex);
67: } catch (final InvalidRegistryObjectException ex) {
68: log(ex);
69: }
70: }
71: }
72:• if (topClass != null) {
73: try {
74: migrator = topClass.newInstance();
75: } catch (final InstantiationException ex) {
76: log(ex);
77: } catch (final IllegalAccessException ex) {
78: log(ex);
79: }
80: }
81: }
82:
83: /**
84: * @return the view model migrator with the highest priority, <code>null</code> if no migrator was registered to the
85: * extension point.
86: * @since 1.8.0
87: */
88: public static ViewModelMigrator getViewModelMigrator() {
89:• if (migrator == null) {
90: readExtensionPoint();
91: }
92: return migrator;
93: }
94:
95: /**
96: *
97: * @return the view model migrator with the highest priority if it also supports migrating string based view models.
98: * @since 1.8
99: */
100: public static StringViewModelMigrator getStringViewModelMigrator() {
101:• if (!StringViewModelMigrator.class.isInstance(getViewModelMigrator())) {
102: return null;
103: }
104: return StringViewModelMigrator.class.cast(getViewModelMigrator());
105: }
106:
107: /**
108: * @return the view model workspace migrator
109: * @since 1.8
110: */
111: public static ViewModelWorkspaceMigrator getViewModelWorkspaceMigrator() {
112:• if (viewModelWorkspaceMigratorObjectTracker == null) {
113: final Bundle bundle = FrameworkUtil.getBundle(ViewModelMigratorUtil.class);
114: final BundleContext bundleContext = bundle.getBundleContext();
115: viewModelWorkspaceMigratorObjectTracker = new ServiceObjectTracker<ViewModelWorkspaceMigrator>(
116: bundleContext, ViewModelWorkspaceMigrator.class);
117: }
118: return viewModelWorkspaceMigratorObjectTracker.getService();
119: }
120:
121: @SuppressWarnings("unchecked")
122: private static <T> Class<T> loadClass(String bundleName, String clazz)
123: throws ClassNotFoundException {
124: final Bundle bundle = Platform.getBundle(bundleName);
125:• if (bundle == null) {
126: throw new ClassNotFoundException(clazz + bundleName);
127: }
128: return (Class<T>) bundle.loadClass(clazz);
129: }
130:
131: private static void log(Throwable throwable) {
132: final Bundle bundle = FrameworkUtil.getBundle(ViewModelMigratorUtil.class);
133: final BundleContext bundleContext = bundle.getBundleContext();
134: final ServiceReference<ReportService> serviceReference = bundleContext.getServiceReference(ReportService.class);
135:• if (serviceReference == null) {
136: return;
137: }
138: final ReportService reportService = bundleContext.getService(serviceReference);
139: try {
140:• if (reportService == null) {
141: return;
142: }
143: reportService.report(new AbstractReport(throwable));
144: } finally {
145: bundleContext.ungetService(serviceReference);
146: }
147: }
148:
149: private static ServiceObjectTracker<ViewModelWorkspaceMigrator> viewModelWorkspaceMigratorObjectTracker;
150: }