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package eu.dnetlib.pid.resolver.model.serializer;
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import com.google.gson.JsonArray;
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import com.google.gson.JsonDeserializer;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import eu.dnetlib.pid.resolver.model.ObjectType;
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import eu.dnetlib.pid.resolver.model.ResolvedObject;
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import eu.dnetlib.pid.resolver.model.SubjectType;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import java.util.ArrayList;
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import java.util.List;
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public abstract class ResolvedObjectDeserializer implements JsonDeserializer<ResolvedObject> {
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private static final Log log = LogFactory.getLog(ResolvedObjectDeserializer.class);
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protected void partialDeserialization(final JsonObject root, final ResolvedObject resolvedObject) {
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log.debug("called partialDeserialization");
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try {
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final JsonElement pid = root.get("pid");
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resolvedObject.setPid(pid != null ? pid.getAsString() : "");
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final JsonElement pidType = root.get("pidType");
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resolvedObject.setPidType(pidType != null ? pidType.getAsString() : "");
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final JsonElement type = root.get("type");
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if (type != null)
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switch (type.getAsString()) {
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case "dataset":
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resolvedObject.setType(ObjectType.dataset);
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break;
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case "publication":
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resolvedObject.setType(ObjectType.publication);
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break;
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default:
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resolvedObject.setType(ObjectType.unknown);
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break;
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}
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if (root.has("subjects") && root.get("subjects").isJsonArray()) {
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final JsonArray subjects = root.getAsJsonArray("subjects");
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final List<SubjectType> extractedSubjects = new ArrayList<>();
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if (subjects != null)
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subjects.forEach(sub -> {
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if (sub.isJsonObject()) {
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final JsonObject subject = sub.getAsJsonObject();
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extractedSubjects.add(new SubjectType(subject.get("scheme").getAsString(), subject.get("term").getAsString()));
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}
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});
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resolvedObject.setSubjects(extractedSubjects);
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}
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} catch (Throwable e) {
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log.error("ERROR on partial deserialization " + root, e);
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}
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}
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protected String getValue(final JsonObject input, final String field) {
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return input.has(field) ? input.get(field).getAsString() : "";
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}
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protected List<String> extractListValues(final JsonObject root, final String field) {
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final List<String> output = new ArrayList<>();
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if (root.has(field) && root.get(field).isJsonArray()) {
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root.getAsJsonArray(field)
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.forEach(it -> output.add(it.getAsString()));
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}
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return output;
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}
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}
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