blob: cdf46c2d5be85adbcef6cf64e5cdb05b4f52db26 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/*****************************************************************************
* Copyright (c) 2012 CEA LIST.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.emf.utils;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.expressions.IEvaluationContext;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.papyrus.infra.core.services.ServiceException;
import org.eclipse.papyrus.infra.core.services.ServiceNotFoundException;
import org.eclipse.papyrus.infra.core.services.ServicesRegistry;
import org.eclipse.papyrus.infra.core.utils.AbstractServiceUtils;
import org.eclipse.ui.ISources;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartSite;
/**
* ServicesUtils based on the Handler's ExecutionEvent
*
* It first tests the current selection, then the IWorkbenchPart on which the handler is executed.
* The IWorkbenchPart is expected to be adaptable to a ServiceRegistry.
*
* @author Camille Letavernier
*
* @see ServiceUtilsForSelection
*/
public class ServiceUtilsForHandlers extends AbstractServiceUtils<ExecutionEvent> {
private ServiceUtilsForHandlers() {
//Singleton
}
@Override
public ServicesRegistry getServiceRegistry(ExecutionEvent from) throws ServiceException {
Object context = from.getApplicationContext();
if(context instanceof IEvaluationContext) {
IEvaluationContext evaluationContext = (IEvaluationContext)context;
//Search for the IWorkbenchPartSite from which the ExecutionEvent is sent (May be different that the Active one)
Object workbenchPartSite = evaluationContext.getVariable("org.eclipse.ui.IWorkbenchPartSite");
if(workbenchPartSite instanceof IWorkbenchPartSite) {
IWorkbenchPartSite site = (IWorkbenchPartSite)workbenchPartSite;
Object registry = site.getAdapter(ServicesRegistry.class);
if(registry != null && registry instanceof ServicesRegistry) {
return (ServicesRegistry)registry;
}
//Search for the IWorkbenchPart from which the ExecutionEvent is sent (May be different that the Active one)
IWorkbenchPart workbenchPart = site.getPart();
registry = workbenchPart.getAdapter(ServicesRegistry.class);
if(registry != null && registry instanceof ServicesRegistry) {
return (ServicesRegistry)registry;
}
}
Object selection = evaluationContext.getVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME);
ServicesRegistry registry;
//Try to resolve the ServicesRegistry from the current selection
if(selection instanceof ISelection && !((ISelection)selection).isEmpty()) {
try {
registry = ServiceUtilsForSelection.getInstance().getServiceRegistry((ISelection)selection);
if(registry != null) {
return registry;
}
} catch (ServiceException ex) {
//Ignore and try another ServiceUtils
}
}
//We couldn't retrieve the ServiceRegistry from the current selection.
//Try to adapt the active part to the ServicesRegistry
IWorkbenchPart part = (IWorkbenchPart)evaluationContext.getVariable(ISources.ACTIVE_PART_NAME);
registry = (ServicesRegistry)(part).getAdapter(ServicesRegistry.class);
if(registry != null) {
return registry;
}
}
throw new ServiceNotFoundException("The ServiceRegistry cannot be resolved");
}
public static ServiceUtilsForHandlers getInstance() {
return instance;
}
private static final ServiceUtilsForHandlers instance = new ServiceUtilsForHandlers();
}
|
