forked from D-Net/dnet-hadoop
109 lines
4.6 KiB
Java
109 lines
4.6 KiB
Java
package eu.dnetlib.dhp.provision.update;
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import com.google.gson.JsonArray;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonParser;
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import eu.dnetlib.dhp.provision.scholix.ScholixCollectedFrom;
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import eu.dnetlib.dhp.provision.scholix.ScholixEntityId;
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import eu.dnetlib.dhp.provision.scholix.ScholixIdentifier;
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import eu.dnetlib.dhp.provision.scholix.ScholixResource;
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import eu.dnetlib.dhp.utils.DHPUtils;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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public class CrossRefParserJSON {
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private static List<ScholixCollectedFrom> collectedFrom =generateCrossrefCollectedFrom("complete");
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public static ScholixResource parseRecord(final String record) {
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if (record == null) return null;
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JsonElement jElement = new JsonParser().parse(record);
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JsonElement source = null;
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if (jElement.getAsJsonObject().has("_source")) {
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source = jElement.getAsJsonObject().get("_source");
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if (source == null || !source.isJsonObject())
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return null;
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}
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else if(jElement.getAsJsonObject().has("DOI")){
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source = jElement;
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} else {
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return null;
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}
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final JsonObject message = source.getAsJsonObject();
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ScholixResource currentObject = new ScholixResource();
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if (message.get("DOI") != null) {
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final String doi = message.get("DOI").getAsString();
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currentObject.setIdentifier(Collections.singletonList(new ScholixIdentifier(doi, "doi")));
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}
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if ((!message.get("created").isJsonNull()) && (message.getAsJsonObject("created").get("date-time") != null)) {
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currentObject.setPublicationDate(message.getAsJsonObject("created").get("date-time").getAsString());
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}
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if (message.get("title")!= null && !message.get("title").isJsonNull() && message.get("title").isJsonArray() ) {
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JsonArray array = message.get("title").getAsJsonArray();
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currentObject.setTitle(array.get(0).getAsString());
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}
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if (message.get("author") != null && !message.get("author").isJsonNull()) {
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JsonArray author = message.getAsJsonArray("author");
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List<ScholixEntityId> authorList = new ArrayList<>();
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for (JsonElement anAuthor : author) {
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JsonObject currentAuth = anAuthor.getAsJsonObject();
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String family = "";
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String given = "";
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if (currentAuth != null && currentAuth.get("family") != null && !currentAuth.get("family").isJsonNull()) {
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family = currentAuth.get("family").getAsString();
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}
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if (currentAuth != null && currentAuth.get("given") != null && !currentAuth.get("given").isJsonNull()) {
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given = currentAuth.get("given").getAsString();
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}
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authorList.add(new ScholixEntityId(String.format("%s %s", family, given), null));
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}
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currentObject.setCreator(authorList);
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}
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if (message.get("publisher") != null && !message.get("publisher").isJsonNull()) {
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currentObject.setPublisher(Collections.singletonList(new ScholixEntityId(message.get("publisher").getAsString(), null)));
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}
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currentObject.setCollectedFrom(collectedFrom);
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currentObject.setObjectType("publication");
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currentObject.setDnetIdentifier(generateId(message.get("DOI").getAsString(), "doi", "publication"));
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return currentObject;
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}
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private static List<ScholixCollectedFrom> generateCrossrefCollectedFrom(final String completionStatus) {
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final ScholixEntityId scholixEntityId = new ScholixEntityId("Crossref",
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Collections.singletonList(new ScholixIdentifier("dli_________::crossref", "dnet_identifier")));
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return Collections.singletonList(
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new ScholixCollectedFrom(
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scholixEntityId,"resolved", completionStatus));
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}
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private static String generateId(final String pid, final String pidType, final String entityType) {
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String type;
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switch (entityType){
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case "publication":
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type = "50|";
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break;
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case "dataset":
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type = "60|";
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break;
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case "unknown":
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type = "70|";
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break;
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default:
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throw new IllegalArgumentException("unexpected value "+entityType);
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}
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return type+ DHPUtils.md5(String.format("%s::%s", pid.toLowerCase().trim(), pidType.toLowerCase().trim()));
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}
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}
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