]> gerrit.simantics Code Review - simantics/platform.git/blob - bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/request/ChildrenByIdentifier.java
Merge "Allow loading databoard serialized files with type adapting" into release...
[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / request / ChildrenByIdentifier.java
1 /*******************************************************************************
2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
3  * in Industry THTH ry.
4  * All rights reserved. This program and the accompanying materials
5  * are made available under the terms of the Eclipse Public License v1.0
6  * which accompanies this distribution, and is available at
7  * http://www.eclipse.org/legal/epl-v10.html
8  *
9  * Contributors:
10  *     VTT Technical Research Centre of Finland - initial API and implementation
11  *******************************************************************************/
12 package org.simantics.db.layer0.request;
13
14 import java.util.Collection;
15 import java.util.HashMap;
16 import java.util.Map;
17
18 import org.simantics.datatypes.literal.GUID;
19 import org.simantics.db.ReadGraph;
20 import org.simantics.db.Resource;
21 import org.simantics.db.common.request.ResourceRead;
22 import org.simantics.db.exception.DatabaseException;
23 import org.simantics.layer0.Layer0;
24
25 /**
26  * Get a map from GUIDs to the children of the given resource.
27  */
28 public final class ChildrenByIdentifier extends ResourceRead<Map<GUID, Resource>> {
29         public ChildrenByIdentifier(Resource resource) {
30                 super(resource);
31         }
32
33         @Override
34         public Map<GUID, Resource> perform(ReadGraph graph) throws DatabaseException {
35                 Map<GUID, Resource> result = new HashMap<>();
36                 Layer0 L0 = Layer0.getInstance(graph);
37                 Collection<Resource> children = graph.getObjects(resource, L0.ConsistsOf);
38                 for (Resource child : children) {
39                         GUID guid = graph.getPossibleRelatedValue(child, L0.identifier, GUID.BINDING);
40                         if (guid != null)
41                                 result.put(guid, child);
42                 }
43                 
44                 return result;
45         }
46 }