blob: 6d62b1ba0fc7bef3eb56cf93e0e16880e91421ae (
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
|
/***************************************************************************
* Copyright (c) 2004 - 2007 Eike Stepper, Germany.
* 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:
* Eike Stepper - initial API and implementation
**************************************************************************/
package org.eclipse.emf.internal.cdo.util;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.internal.cdo.bundle.OM;
import org.eclipse.net4j.internal.util.om.trace.ContextTracer;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
/**
* @author Eike Stepper
*/
public abstract class PackageClosure implements IPackageClosure
{
private static final ContextTracer TRACER = new ContextTracer(OM.DEBUG_MODEL, PackageClosure.class);
protected PackageClosure()
{
}
public Set<EPackage> calculate(Collection<EPackage> ePackages)
{
// Optimize no packages
if (ePackages.isEmpty())
{
return EMPTY_CLOSURE;
}
// Optimize 1 package
if (ePackages.size() == 1)
{
return calculate(ePackages.iterator().next());
}
// Handle >1 packages
Set<EPackage> result = new HashSet<EPackage>();
for (EPackage ePackage : ePackages)
{
Set<EPackage> packages = calculate(ePackage);
result.addAll(packages);
}
return result;
}
public Set<EPackage> calculate(EPackage ePackage)
{
if (TRACER.isEnabled())
{
TRACER.trace("Package closure for " + ePackage.getNsURI());
}
Set<EPackage> visited = new HashSet<EPackage>();
collectContents(ePackage, visited);
return visited;
}
protected abstract void collectContents(EPackage ePackage, Set<EPackage> visited);
}
|