-
Notifications
You must be signed in to change notification settings - Fork 14
/
ReferencedListHandler.java
84 lines (74 loc) · 3.24 KB
/
ReferencedListHandler.java
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
package cz.cvut.kbss.ontodriver.jena.list;
import cz.cvut.kbss.ontodriver.descriptor.ReferencedListDescriptor;
import cz.cvut.kbss.ontodriver.descriptor.ReferencedListValueDescriptor;
import cz.cvut.kbss.ontodriver.jena.connector.StorageConnector;
import cz.cvut.kbss.ontodriver.model.NamedResource;
import org.apache.jena.rdf.model.Property;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.rdf.model.Statement;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import static org.apache.jena.rdf.model.ResourceFactory.*;
class ReferencedListHandler extends ListHandler<ReferencedListDescriptor, ReferencedListValueDescriptor> {
ReferencedListHandler(StorageConnector connector) {
super(connector);
}
@Override
AbstractListIterator iterator(ReferencedListDescriptor descriptor) {
return new ReferencedListIterator(descriptor, connector);
}
@Override
void persistList(ReferencedListValueDescriptor descriptor) {
final List<NamedResource> values = descriptor.getValues();
if (values.isEmpty()) {
return;
}
final Property hasNext = createProperty(descriptor.getNextNode().getIdentifier().toString());
final Property hasContent = createProperty(descriptor.getNodeContent().getIdentifier().toString());
final String context = descriptor.getContext() != null ? descriptor.getContext().toString() : null;
Resource previous = createResource(descriptor.getListOwner().getIdentifier().toString());
final List<Statement> toAdd = new ArrayList<>(values.size() * 2);
for (int i = 0; i < values.size(); i++) {
final Resource node = generateNewListNode(descriptor.getListProperty().getIdentifier(), i, context);
if (i == 0) {
toAdd.add(createStatement(previous,
createProperty(descriptor.getListProperty().getIdentifier().toString()), node));
} else {
toAdd.add(createStatement(previous, hasNext, node));
}
toAdd.add(createStatement(node, hasContent, createResource(values.get(i).getIdentifier().toString())));
previous = node;
}
if (context != null) {
connector.add(toAdd, context);
} else {
connector.add(toAdd);
}
}
private Resource generateNewListNode(URI property, int index, String context) {
Resource node;
Collection<Statement> statements;
do {
node = createResource(property.toString() + "-SEQ_" + index++);
if (context != null) {
statements = connector.find(node, null, null, context);
} else {
statements = connector.find(node, null, null);
}
} while (!statements.isEmpty());
return node;
}
@Override
void updateList(ReferencedListValueDescriptor descriptor) {
final AbstractListIterator it = new ReferencedListIterator(descriptor, connector);
int i = 0;
while (it. hasNext() && i < descriptor.getValues().size()) {
final NamedResource value = it.nextValue();
i++;
}
if (i < descriptor.getValues().size()) {
}
}
}