-
Notifications
You must be signed in to change notification settings - Fork 14
/
SimpleListHandler.java
76 lines (66 loc) · 3.15 KB
/
SimpleListHandler.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
package cz.cvut.kbss.ontodriver.jena.list;
import cz.cvut.kbss.ontodriver.descriptor.SimpleListDescriptor;
import cz.cvut.kbss.ontodriver.descriptor.SimpleListValueDescriptor;
import cz.cvut.kbss.ontodriver.jena.connector.StorageConnector;
import cz.cvut.kbss.ontodriver.model.Axiom;
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.ResourceFactory;
import org.apache.jena.rdf.model.Statement;
import java.util.ArrayList;
import java.util.List;
import static org.apache.jena.rdf.model.ResourceFactory.createResource;
class SimpleListHandler extends ListHandler<SimpleListDescriptor, SimpleListValueDescriptor> {
SimpleListHandler(StorageConnector connector) {
super(connector);
}
@Override
public List<Axiom<NamedResource>> loadList(SimpleListDescriptor descriptor) {
final List<Axiom<NamedResource>> result = new ArrayList<>();
final Resource owner = createResource(descriptor.getListOwner().getIdentifier().toString());
final Property hasList = ResourceFactory
.createProperty(descriptor.getListProperty().getIdentifier().toString());
final Property hasNext = ResourceFactory.createProperty(descriptor.getNextNode().getIdentifier().toString());
final String context = descriptor.getContext() != null ? descriptor.getContext().toString() : null;
final SimpleListIterator it = new SimpleListIterator(owner, hasList, hasNext, context, connector);
while (it.hasNext()) {
result.add(it.next());
}
return result;
}
@Override
void persistList(SimpleListValueDescriptor descriptor) {
if (descriptor.getValues().isEmpty()) {
return;
}
if (descriptor.getContext() != null) {
connector.add(axiomsToStatements(descriptor), descriptor.getContext().toString());
} else {
connector.add(axiomsToStatements(descriptor));
}
}
private List<Statement> axiomsToStatements(SimpleListValueDescriptor descriptor) {
final List<Statement> statements = new ArrayList<>(descriptor.getValues().size());
final Resource owner = createResource(descriptor.getListOwner().getIdentifier().toString());
final Property hasList = ResourceFactory
.createProperty(descriptor.getListProperty().getIdentifier().toString());
final Property hasNext = ResourceFactory.createProperty(descriptor.getNextNode().getIdentifier().toString());
Resource previous = owner;
boolean first = true;
for (NamedResource value : descriptor.getValues()) {
final Resource node = createResource(value.getIdentifier().toString());
if (first) {
statements.add(ResourceFactory.createStatement(previous, hasList, node));
first = false;
} else {
statements.add(ResourceFactory.createStatement(previous, hasNext, node));
}
previous = node;
}
return statements;
}
@Override
void updateList(SimpleListValueDescriptor descriptor) {
}
}