1
|
package eu.dnetlib.resolver;
|
2
|
|
3
|
import java.net.URLEncoder;
|
4
|
|
5
|
import com.google.common.collect.Lists;
|
6
|
import com.google.gson.JsonArray;
|
7
|
import com.google.gson.JsonElement;
|
8
|
import com.google.gson.JsonObject;
|
9
|
import com.google.gson.JsonParser;
|
10
|
import eu.dnetlib.miscutils.functional.xml.ApplyXslt;
|
11
|
import eu.dnetlib.resolver.model.ObjectProvenance;
|
12
|
import eu.dnetlib.resolver.model.ResolvedObject;
|
13
|
import org.apache.commons.logging.Log;
|
14
|
import org.apache.commons.logging.LogFactory;
|
15
|
import org.springframework.core.io.ClassPathResource;
|
16
|
|
17
|
public class OpenaireResolver extends AbstractPIDResolver {
|
18
|
|
19
|
private final static String templateURL = "objidentifier:\"%s\"";
|
20
|
private final static String OPENAIRE_NS_PREFIX = "openaire____";
|
21
|
private final static String baseURL = "http://solr.openaire.eu:8983/solr/DMF-index-openaire_shard1_replica1/select?q=%s&wt=json";
|
22
|
|
23
|
private static final Log log = LogFactory.getLog(OpenaireResolver.class); // NOPMD by marko on 11/24/08 5:02 PM
|
24
|
|
25
|
private ApplyXslt xsltMapper = new ApplyXslt(new ClassPathResource("eu/dnetlib/resolver/xslt/openaire2Dli.xslt"));
|
26
|
|
27
|
private OpenAireParser parser = new OpenAireParser();
|
28
|
|
29
|
@Override
|
30
|
protected boolean canResolvePid(final String pidType) {
|
31
|
return (pidType != null && pidType.toLowerCase().equals("openaire"));
|
32
|
}
|
33
|
|
34
|
@Override
|
35
|
protected ResolvedObject resolve(final String pid, final String pidType) {
|
36
|
try {
|
37
|
final String currentQuery = String.format(baseURL, URLEncoder.encode(String.format(templateURL, pid), "UTF-8"));
|
38
|
ResolvedObject obj = parsingResponse(requestURL(currentQuery));
|
39
|
if (obj == null)
|
40
|
return null;
|
41
|
obj.setPidType(pidType);
|
42
|
obj.setPid(pid);
|
43
|
ObjectProvenance provenance = new ObjectProvenance();
|
44
|
setDatasourceProvenace(provenance, OPENAIRE_NS_PREFIX);
|
45
|
obj.fixContribution(provenance);
|
46
|
obj.setDatasourceProvenance(Lists.newArrayList(provenance));
|
47
|
return obj;
|
48
|
} catch (Throwable e) {
|
49
|
log.error("Error on resolve pid " + pid, e);
|
50
|
}
|
51
|
return null;
|
52
|
}
|
53
|
|
54
|
private ResolvedObject parsingResponse(final String response) {
|
55
|
if (response == null) return null;
|
56
|
|
57
|
JsonElement jElement = new JsonParser().parse(response);
|
58
|
JsonObject jobject = jElement.getAsJsonObject();
|
59
|
if (jobject.has("response")) {
|
60
|
long total = jobject.get("response").getAsJsonObject().get("numFound").getAsLong();
|
61
|
if (total == 0) return null;
|
62
|
JsonArray hits = ((JsonObject) jobject.get("response")).get("docs").getAsJsonArray();
|
63
|
JsonElement s = ((JsonObject) hits.get(0)).get("__result").getAsJsonArray().get(0);
|
64
|
return parser.parseObject(s.getAsString());
|
65
|
}
|
66
|
return null;
|
67
|
|
68
|
}
|
69
|
}
|