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AnnotationValueSerializer.java
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AnnotationValueSerializer.java
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/**
* Copyright (C) 2020 Czech Technical University in Prague
* <p>
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
* version.
* <p>
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jsonld.serialization;
import cz.cvut.kbss.jopa.model.MultilingualString;
import cz.cvut.kbss.jsonld.JsonLd;
import cz.cvut.kbss.jsonld.common.BeanClassProcessor;
import cz.cvut.kbss.jsonld.serialization.model.CollectionNode;
import cz.cvut.kbss.jsonld.serialization.model.JsonNode;
import cz.cvut.kbss.jsonld.serialization.model.ObjectNode;
import java.util.Collection;
class AnnotationValueSerializer implements ValueSerializer {
private final MultilingualStringSerializer multilingualStringSerializer;
AnnotationValueSerializer(MultilingualStringSerializer multilingualStringSerializer) {
this.multilingualStringSerializer = multilingualStringSerializer;
}
@Override
public JsonNode serialize(String attId, Object value) {
if (value instanceof Collection) {
final Collection<?> col = (Collection<?>) value;
final CollectionNode node = JsonNodeFactory.createCollectionNode(attId, col);
col.forEach(item -> {
if (isReference(item)) {
node.addItem(serializeReference(null, item));
} else if (item instanceof MultilingualString) {
node.addItem(multilingualStringSerializer.serialize((MultilingualString) item));
} else {
node.addItem(JsonNodeFactory.createLiteralNode(item));
}
});
return node;
} else {
if (isReference(value)) {
return serializeReference(attId, value);
} else if (value instanceof MultilingualString) {
return multilingualStringSerializer.serialize(attId, (MultilingualString) value);
}
return JsonNodeFactory.createLiteralNode(attId, value);
}
}
private boolean isReference(Object value) {
return BeanClassProcessor.isIdentifierType(value.getClass()) && !(value instanceof String);
}
private JsonNode serializeReference(String attId, Object value) {
final ObjectNode node =
attId != null ? JsonNodeFactory.createObjectNode(attId) : JsonNodeFactory.createObjectNode();
node.addItem(JsonNodeFactory.createObjectIdNode(JsonLd.ID, value));
return node;
}
}