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
101
102
103
104
105
106
|
/*
* Copyright (c) 2013, 2015 Eike Stepper (Berlin, Germany) and others.
* 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.cdo.internal.server;
import org.eclipse.emf.cdo.common.branch.CDOBranch;
import org.eclipse.emf.cdo.common.protocol.CDOProtocolConstants;
import org.eclipse.emf.cdo.common.revision.CDORevision;
import org.eclipse.emf.cdo.common.revision.CDORevisionHandler;
import org.eclipse.emf.cdo.common.util.CDOQueryInfo;
import org.eclipse.emf.cdo.server.IQueryContext;
import org.eclipse.emf.cdo.server.IQueryHandler;
import org.eclipse.emf.cdo.spi.common.revision.DetachedCDORevision;
import org.eclipse.emf.cdo.spi.server.InternalRepository;
import org.eclipse.emf.cdo.spi.server.QueryHandlerFactory;
import org.eclipse.net4j.util.factory.ProductCreationException;
import org.eclipse.emf.ecore.EClass;
import java.util.List;
/**
* @author Eike Stepper
*/
public class InstancesQueryHandler implements IQueryHandler
{
public InstancesQueryHandler()
{
}
public void executeQuery(CDOQueryInfo info, IQueryContext context)
{
EClass type = (EClass)info.getParameters().get(CDOProtocolConstants.QUERY_LANGUAGE_INSTANCES_TYPE);
if (type != null)
{
executeQuery(type, context);
if (!Boolean.TRUE.equals(info.getParameters().get(CDOProtocolConstants.QUERY_LANGUAGE_INSTANCES_EXACT)))
{
List<EClass> subTypes = context.getView().getRepository().getPackageRegistry().getSubTypes().get(type);
if (subTypes != null && !subTypes.isEmpty())
{
for (EClass subType : subTypes)
{
if (context.getResultCount() == 0)
{
break;
}
executeQuery(subType, context);
}
}
}
}
}
private void executeQuery(EClass type, final IQueryContext context)
{
if (type.isInterface() || type.isAbstract())
{
return;
}
CDOBranch branch = context.getBranch();
long timeStamp = context.getTimeStamp();
InternalRepository repository = (InternalRepository)context.getView().getRepository();
repository.handleRevisions(type, branch, false, timeStamp, false, new CDORevisionHandler()
{
public boolean handleRevision(CDORevision revision)
{
if (revision instanceof DetachedCDORevision)
{
return true;
}
return context.addResult(revision);
}
});
}
/**
* @author Eike Stepper
*/
public static class Factory extends QueryHandlerFactory
{
public Factory()
{
super(CDOProtocolConstants.QUERY_LANGUAGE_INSTANCES);
}
@Override
public InstancesQueryHandler create(String description) throws ProductCreationException
{
return new InstancesQueryHandler();
}
}
}
|
