Method: SimpleSetPropertyStrategy(EntityType, AbstractPluralAttribute, Descriptor, EntityMappingHelper)

1: /**
2: * Copyright (C) 2020 Czech Technical University in Prague
3: *
4: * This program is free software: you can redistribute it and/or modify it under
5: * the terms of the GNU General Public License as published by the Free Software
6: * Foundation, either version 3 of the License, or (at your option) any
7: * later version.
8: *
9: * This program is distributed in the hope that it will be useful, but WITHOUT
10: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11: * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
12: * details. You should have received a copy of the GNU General Public License
13: * along with this program. If not, see <http://www.gnu.org/licenses/>.
14: */
15: package cz.cvut.kbss.jopa.oom;
16:
17: import cz.cvut.kbss.jopa.model.descriptors.Descriptor;
18: import cz.cvut.kbss.jopa.model.metamodel.AbstractPluralAttribute;
19: import cz.cvut.kbss.jopa.model.metamodel.EntityType;
20: import cz.cvut.kbss.jopa.utils.EntityPropertiesUtils;
21: import cz.cvut.kbss.jopa.utils.IdentifierTransformer;
22: import cz.cvut.kbss.ontodriver.model.NamedResource;
23: import cz.cvut.kbss.ontodriver.model.Value;
24:
25: import java.net.URI;
26: import java.util.Collection;
27: import java.util.HashSet;
28: import java.util.Objects;
29: import java.util.Set;
30:
31: class SimpleSetPropertyStrategy<X> extends PluralObjectPropertyStrategy<AbstractPluralAttribute<? super X, ?, ?>, X> {
32:
33: SimpleSetPropertyStrategy(EntityType<X> et, AbstractPluralAttribute<? super X, ?, ?> att, Descriptor descriptor,
34: EntityMappingHelper mapper) {
35: super(et, att, descriptor, mapper);
36: }
37:
38: @Override
39: void buildAxiomValuesFromInstance(X instance, AxiomValueGatherer valueBuilder) {
40: final Object value = extractFieldValueFromInstance(instance);
41: assert value instanceof Collection || value == null;
42: final Collection<?> valueCollection = (Collection<?>) value;
43: extractValues(valueCollection, valueBuilder);
44: }
45:
46: private <T> void extractValues(Collection<T> valueCollection, AxiomValueGatherer valueBuilder) {
47: if (valueCollection == null) {
48: valueBuilder.addValue(createAssertion(), Value.nullValue(), getAttributeContext());
49: return;
50: }
51: final Set<Value<?>> assertionValues = new HashSet<>(valueCollection.size());
52: if (IdentifierTransformer.isValidIdentifierType(attribute.getBindableJavaType())) {
53: valueCollection.stream().filter(Objects::nonNull).forEach(item -> assertionValues
54: .add(new Value<>(NamedResource.create(IdentifierTransformer.valueAsUri(item)))));
55: } else {
56: final EntityType<T> et = (EntityType<T>) mapper.getEntityType(attribute.getBindableJavaType());
57: for (T val : valueCollection) {
58: if (val == null) {
59: continue;
60: }
61: if (referenceSavingResolver.shouldSaveReferenceToItem(val, getAttributeValueContext())) {
62: final URI valId = EntityPropertiesUtils.getIdentifier(val, et);
63: assert valId != null;
64: assertionValues.add(new Value<>(NamedResource.create(valId)));
65: } else {
66: referenceSavingResolver
67: .registerPendingReference(valueBuilder.getSubjectIdentifier(), createAssertion(), val,
68: getAttributeContext());
69: }
70: }
71: }
72: valueBuilder.addValues(createAssertion(), assertionValues, getAttributeContext());
73: }
74: }