Method: serialize(Object, SerializationContext)

1: /**
2: * Copyright (C) 2022 Czech Technical University in Prague
3: * <p>
4: * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
5: * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
6: * version.
7: * <p>
8: * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
9: * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
10: * details. You should have received a copy of the GNU General Public License along with this program. If not, see
11: * <http://www.gnu.org/licenses/>.
12: */
13: package cz.cvut.kbss.jsonld.serialization.serializer.compact;
14:
15: import cz.cvut.kbss.jsonld.JsonLd;
16: import cz.cvut.kbss.jsonld.common.EnumUtil;
17: import cz.cvut.kbss.jsonld.serialization.JsonNodeFactory;
18: import cz.cvut.kbss.jsonld.serialization.model.JsonNode;
19: import cz.cvut.kbss.jsonld.serialization.model.ObjectNode;
20: import cz.cvut.kbss.jsonld.serialization.serializer.ValueSerializer;
21: import cz.cvut.kbss.jsonld.serialization.traversal.ObjectGraphTraverser;
22: import cz.cvut.kbss.jsonld.serialization.traversal.SerializationContext;
23:
24: /**
25: * Value serializer for object property values.
26: */
27: public class ObjectPropertyValueSerializer implements ValueSerializer {
28:
29: private final ObjectGraphTraverser graphTraverser;
30:
31: public ObjectPropertyValueSerializer(ObjectGraphTraverser graphTraverser) {
32: this.graphTraverser = graphTraverser;
33: }
34:
35: @Override
36: public JsonNode serialize(Object value, SerializationContext ctx) {
37:• if (value.getClass().isEnum()) {
38: return serializeEnumConstant((Enum<?>) value, ctx);
39: }
40: graphTraverser.traverse(ctx);
41: return null;
42: }
43:
44: private static JsonNode serializeEnumConstant(Enum<?> constant, SerializationContext<?> ctx) {
45: final String iri = EnumUtil.resolveMappedIndividual(constant);
46: final ObjectNode node = JsonNodeFactory.createObjectNode(ctx.getTerm());
47: node.addItem(JsonNodeFactory.createObjectIdNode(JsonLd.ID, iri));
48: return node;
49: }
50: }