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Prepare: made the project a java + scala project

This commit is contained in:
Francesco 2022-04-07 18:33:02 +02:00
parent e3e7d197d5
commit 4ff9d983a3
5 changed files with 58 additions and 61 deletions
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12
prepare/build.gradle
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@ -1,18 +1,28 @@
plugins {
id 'application'
id 'scala'
}
version '0.1'
repositories {
mavenCentral()
}
dependencies {
implementation 'org.scala-lang:scala3-library_3:3.1.2'
implementation 'org.apache.jena:apache-jena-libs:4.4.0'
implementation 'org.apache.logging.log4j:log4j-core:2.17.2'
implementation 'org.slf4j:slf4j-simple:1.7.36'
}
version '0.1'
sourceSets {
main {
java.srcDirs = ["src/main"]
scala.srcDirs = ["src/main"]
resources.srcDirs = ["src/resources"]
}
}
java {
sourceCompatibility = 11

42
prepare/src/main/Main.scala Normal file
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@ -0,0 +1,42 @@
import org.apache.jena.query.QueryExecutionFactory
import org.apache.jena.rdf.model.{InfModel, Model, ModelFactory}
import org.apache.jena.reasoner.ReasonerRegistry
import java.io.InputStream
object Main extends App {
{
println("Loading knowledge graph...")
val kg: InfModel = ModelFactory.createInfModel(ReasonerRegistry.getTransitiveReasoner, ModelFactory.createDefaultModel)
val mondialDataset: InputStream = Option(ClassLoader.getSystemResourceAsStream("mondial_2022_04_04.n3"))
.getOrElse({
System.err.println("Impossible to open dataset")
System.exit(1)
null
})
kg.read(mondialDataset, null, "TTL");
printf("Loaded %s triples\n", kg.listStatements().toList.size)
val countries = getMondialNamedEntities(kg, "Country")
printf("There are %d countries in the dataset\n", countries.size)
}
def getMondialNamedEntities(kg: Model, prefixedType: String): List[NamedEntity] = {
var result: List[NamedEntity] = Nil
//noinspection HttpUrlsUsage
val MONDIAL_PREFIX = "http://www.semwebtech.org/mondial/10/meta#"
val fullType = MONDIAL_PREFIX + prefixedType;
val nameProperty = MONDIAL_PREFIX + "name"
val queryString = String.format("SELECT ?entity ?name WHERE { ?entity a <%s> ; <%s> ?name. }", fullType, nameProperty)
val resultSet = QueryExecutionFactory.create(queryString, kg).execSelect()
while (resultSet.hasNext) {
val solution = resultSet.next()
result = result :+ new NamedEntity(
solution.getLiteral("?name").getString,
solution.getResource("?entity")
)
}
result
}
}

5
prepare/src/main/NamedEntity.scala Normal file
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import org.apache.jena.rdf.model.Resource
class NamedEntity(val Name: String, val entity: Resource) {
}

60
prepare/src/main/java/Main.java
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@ -1,60 +0,0 @@
import org.apache.jena.query.QueryExecution;
import org.apache.jena.query.QueryExecutionFactory;
import org.apache.jena.query.QuerySolution;
import org.apache.jena.query.ResultSet;
import org.apache.jena.rdf.model.InfModel;
import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.ModelFactory;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.reasoner.ReasonerRegistry;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
public final class Main
{
public static void main(String[] args)
{
System.out.println("Loading knowledge graph...");
InfModel kg = ModelFactory.createInfModel(ReasonerRegistry.getTransitiveReasoner(), ModelFactory.createDefaultModel());
final InputStream mondialDataset = ClassLoader.getSystemResourceAsStream("mondial_2022_04_04.n3");
if (mondialDataset == null)
{
System.err.println("Impossible to open mondial dataset");
System.exit(1);
}
kg.read(mondialDataset, null, "TTL");
System.out.printf("Loaded %s triples\n", kg.listStatements().toList().size());
{
Map<String, Resource> countries = mondialGetEntitiesWithName(kg, "Country");
System.out.printf("There are %d countries in the dataset\n", countries.size());
}
}
private static Map<String, Resource> mondialGetEntitiesWithName(Model kg, String prefixedType)
{
Map<String, Resource> result = new HashMap<>();
String queryString = String.format("PREFIX m: <http://www.semwebtech.org/mondial/10/meta#> SELECT ?entity ?name WHERE { ?entity a m:%s ; m:name ?name. }", prefixedType);
try (QueryExecution execution = QueryExecutionFactory.create(queryString, kg))
{
final ResultSet resultSet = execution.execSelect();
while (resultSet.hasNext())
{
QuerySolution solution = resultSet.next();
Resource entity = solution.getResource("?entity");
String name = solution.getLiteral("?name").getString();
if (result.containsKey(name))
{
System.err.printf("Error: multiple entities with the name %s\n", name);
System.exit(1);
}
result.put(name, entity);
}
}
return result;
}
}

0
prepare/src/main/resources/mondial_2022_04_04.n3 → prepare/src/resources/mondial_2022_04_04.n3
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