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MultilingualStringSerializer.java
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MultilingualStringSerializer.java
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/**
* Copyright (C) 2022 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.serializer.compact;
import cz.cvut.kbss.jopa.model.MultilingualString;
import cz.cvut.kbss.jsonld.JsonLd;
import cz.cvut.kbss.jsonld.serialization.JsonNodeFactory;
import cz.cvut.kbss.jsonld.serialization.model.JsonNode;
import cz.cvut.kbss.jsonld.serialization.model.ObjectNode;
import cz.cvut.kbss.jsonld.serialization.model.SetNode;
import cz.cvut.kbss.jsonld.serialization.serializer.ValueSerializer;
import cz.cvut.kbss.jsonld.serialization.traversal.SerializationContext;
import java.util.Map;
/**
* This is used to serialize {@link MultilingualString} values.
*/
public class MultilingualStringSerializer implements ValueSerializer<MultilingualString> {
@Override
public JsonNode serialize(MultilingualString value, SerializationContext<MultilingualString> ctx) {
if (value.getValue().size() == 1) {
final Map.Entry<String, String> entry = value.getValue().entrySet().iterator().next();
return createNode(ctx.getTerm(), entry.getValue(), entry.getKey());
}
final SetNode collectionNode = JsonNodeFactory.createCollectionNodeFromArray(ctx.getTerm());
addTranslationsToCollectionNode(value, collectionNode);
return collectionNode;
}
private static JsonNode createNode(String attName, String value, String language) {
final ObjectNode node = JsonNodeFactory.createObjectNode(attName);
node.addItem(JsonNodeFactory.createLiteralNode(JsonLd.LANGUAGE, language != null ? language : JsonLd.NONE));
node.addItem(JsonNodeFactory.createLiteralNode(JsonLd.VALUE, value));
return node;
}
private void addTranslationsToCollectionNode(MultilingualString str, SetNode target) {
str.getValue().forEach((lang, val) -> target.addItem(createNode(null, val, lang)));
}
}