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CollectionDeserializer.java
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CollectionDeserializer.java
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/**
* Copyright (C) 2017 Czech Technical University in Prague
*
* 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.
*
* 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.deserialization.expanded;
import cz.cvut.kbss.jsonld.JsonLd;
import cz.cvut.kbss.jsonld.deserialization.InstanceBuilder;
import java.util.List;
import java.util.Map;
class CollectionDeserializer extends Deserializer<List<?>> {
private final String property;
CollectionDeserializer(InstanceBuilder instanceBuilder, DeserializerConfig config, String property) {
super(instanceBuilder, config);
this.property = property;
}
@Override
void processValue(List<?> value) {
if (value.size() == 1 && value.get(0) instanceof Map) {
final Map<?, ?> map = (Map<?, ?>) value.get(0);
if (!instanceBuilder.isPlural(property)) {
resolvePropertyValue(property, map);
return;
}
if (map.size() == 1 && map.containsKey(JsonLd.LIST)) {
assert map.get(JsonLd.LIST) instanceof List;
processValue((List<?>) map.get(JsonLd.LIST));
return;
}
}
instanceBuilder.openCollection(property);
for (Object item : value) {
if (item instanceof Map) {
resolveValue((Map<?, ?>) item);
} else {
instanceBuilder.addValue(item);
}
}
instanceBuilder.closeCollection();
}
private void resolveValue(Map<?, ?> value) {
if (value.size() == 1 && value.containsKey(JsonLd.VALUE)) {
instanceBuilder.addValue(value.get(JsonLd.VALUE));
} else if (value.size() == 1 && value.containsKey(JsonLd.ID)) {
instanceBuilder.addNodeReference(value.get(JsonLd.ID).toString());
} else {
final Class<?> elementType = instanceBuilder.getCurrentCollectionElementType();
new ObjectDeserializer(instanceBuilder, config, elementType).processValue(value);
}
}
private void resolvePropertyValue(String property, Map<?, ?> value) {
if (value.size() == 1 && value.containsKey(JsonLd.VALUE)) {
instanceBuilder.addValue(property, value.get(JsonLd.VALUE));
} else if (value.size() == 1 && value.containsKey(JsonLd.ID)) {
instanceBuilder.addNodeReference(property, value.get(JsonLd.ID).toString());
} else {
new ObjectDeserializer(instanceBuilder, config, property).processValue(value);
}
}
}