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Package: PreviewWorkspaceViewProvider
PreviewWorkspaceViewProvider
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| PreviewWorkspaceViewProvider() |
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| addViewModel(IPath) |
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| addViewResourceChangeListener() |
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| canProvideViewModel(EObject, VViewModelProperties) |
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| dispose() |
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| loadView(IPath) |
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| provideViewModel(EObject, VViewModelProperties) |
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| removeViewModel(IPath) |
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| unloadView(IPath) |
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Coverage
1: /*******************************************************************************
2: * Copyright (c) 2011-2016 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: ******************************************************************************/
14: package org.eclipse.emf.ecp.view.model.preview.common;
15:
16: import java.io.IOException;
17: import java.util.LinkedHashMap;
18: import java.util.Map;
19:
20: import org.eclipse.core.resources.IResourceChangeEvent;
21: import org.eclipse.core.resources.IResourceChangeListener;
22: import org.eclipse.core.resources.IResourceDelta;
23: import org.eclipse.core.resources.ResourcesPlugin;
24: import org.eclipse.core.runtime.IPath;
25: import org.eclipse.emf.common.util.URI;
26: import org.eclipse.emf.ecore.EObject;
27: import org.eclipse.emf.ecore.resource.Resource;
28: import org.eclipse.emf.ecore.resource.ResourceSet;
29: import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
30: import org.eclipse.emf.ecp.view.spi.model.VView;
31: import org.eclipse.emf.ecp.view.spi.model.VViewModelProperties;
32: import org.eclipse.emf.ecp.view.spi.provider.IViewProvider;
33: import org.osgi.service.component.annotations.Component;
34: import org.osgi.service.component.annotations.Deactivate;
35:
36: /**
37: * The IViewProvider provides views from the workspace.
38: *
39: * @author Eugen Neufeld
40: *
41: */
42: @Component(service = { IViewProvider.class, PreviewWorkspaceViewProvider.class })
43: public class PreviewWorkspaceViewProvider implements IViewProvider {
44:
45: private final Map<IPath, VView> trackedPaths = new LinkedHashMap<IPath, VView>();
46: private IResourceChangeListener viewResourceChangeListener;
47:
48: /** Constructor. */
49: public PreviewWorkspaceViewProvider() {
50: addViewResourceChangeListener();
51: }
52:
53: private void addViewResourceChangeListener() {
54: viewResourceChangeListener = new IResourceChangeListener() {
55: @Override
56: public void resourceChanged(IResourceChangeEvent event) {
57: if (trackedPaths.isEmpty()) {
58: return;
59: }
60: IResourceDelta delta = event.getDelta();
61: if (delta != null) {
62: while (delta.getAffectedChildren().length != 0) {
63: delta = delta.getAffectedChildren()[0];
64: }
65: for (final IPath path : trackedPaths.keySet()) {
66: if (delta.getResource().getFullPath().equals(path)) {
67: // reload view
68: final VView view = loadView(path);
69: trackedPaths.put(path, view);
70: }
71: }
72: }
73: }
74: };
75: ResourcesPlugin.getWorkspace().addResourceChangeListener(viewResourceChangeListener);
76: }
77:
78: /**
79: * Add a new view model path to the list of available views in the preview.
80: *
81: * @param path The {@link IPath} to load
82: */
83: public void addViewModel(final IPath path) {
84: final VView view = loadView(path);
85: trackedPaths.put(path, view);
86: }
87:
88: private VView loadView(IPath path) {
89: final ResourceSet resourceSet = new ResourceSetImpl();
90: final Resource resource = resourceSet
91: .createResource(URI.createPlatformResourceURI(path.toOSString(), true));
92: try {
93: resource.load(null);
94: final EObject eObject = resource.getContents().get(0);
95:• if (!VView.class.isInstance(eObject)) {
96: throw new IllegalArgumentException(
97: "The provided path " + path.toString() + " doesn't contain a VView."); //$NON-NLS-1$//$NON-NLS-2$
98: }
99: return (VView) eObject;
100: } catch (final IOException ex) {
101: throw new IllegalArgumentException(ex);
102: }
103: }
104:
105: /**
106: * Remove a view model path from the list of available views in the preview.
107: *
108: * @param path The {@link IPath} to remove
109: */
110: public void removeViewModel(IPath path) {
111: unloadView(path);
112: trackedPaths.remove(path);
113: }
114:
115: private void unloadView(IPath path) {
116: final VView view = trackedPaths.get(path);
117: view.eResource().unload();
118: }
119:
120: @Override
121: public double canProvideViewModel(EObject eObject, VViewModelProperties properties) {
122:• for (final VView view : trackedPaths.values()) {
123:• if (view.getRootEClass().equals(eObject.eClass())) {
124: return 10;
125: }
126: }
127: return NOT_APPLICABLE;
128: }
129:
130: @Override
131: public VView provideViewModel(EObject eObject, VViewModelProperties properties) {
132:• for (final VView view : trackedPaths.values()) {
133:• if (view.getRootEClass().equals(eObject.eClass())) {
134: return view;
135: }
136: }
137: return null;
138: }
139:
140: /** Clean the used resources. */
141: @Deactivate
142: public void dispose() {
143:• if (viewResourceChangeListener != null) {
144: ResourcesPlugin.getWorkspace().removeResourceChangeListener(viewResourceChangeListener);
145: }
146: }
147:
148: }