Question

我试图在OrientDB的帮助下将RDF-Triples导入tinkerpop/blueprints。我找到了基本用法here。

我现在到目前为止：

import info.aduna.iteration.CloseableIteration;

import org.openrdf.model.Statement;
import org.openrdf.model.ValueFactory;
import org.openrdf.sail.Sail;
import org.openrdf.sail.SailConnection;
import org.openrdf.sail.SailException;

import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.graph.Triple;
import com.tinkerpop.blueprints.impls.orient.OrientGraph;
import com.tinkerpop.blueprints.oupls.sail.GraphSail;

import de.hof.iisys.relationExtraction.jena.parser.impl.ParserStreamIterator;
import de.hof.iisys.relationExtraction.neo4j.importer.Importer;


public class ImporterJenaTriples extends Importer {
    private OrientGraph graph = null;
    private Sail sail = null;
    private SailConnection sailConnection = null;
    private ValueFactory valueFactory = null;
    private Thread parserThread = null;

    public ImporterJenaTriples(ParserStreamIterator parser, String databasePath) throws SailException {
        this.parser = parser;
        this.databasePath = databasePath;

        this.initialize();
    }

    private void initialize() throws SailException {
        this.graph = new OrientGraph(this.databasePath);
        this.sail = new GraphSail<OrientGraph>(graph);

        sail.initialize();

        this.sailConnection = sail.getConnection();
        this.valueFactory = sail.getValueFactory();
    }

    public void startImport() {
        this.parserThread = new Thread(this.parser);
        this.parserThread.start();

        try {
            Triple next = (Triple) this.parser.getIterator().next();

            Node subject = next.getSubject();
            Node predicate = next.getPredicate();
            Node object = next.getObject();


        } catch (SailException e) {
            e.printStackTrace();
        }

        try {
            CloseableIteration<? extends Statement, SailException> results = this.sailConnection.getStatements(null, null, null, false);

            while(results.hasNext()) {
                System.out.println(results.next());
            }
        } catch (SailException e) {
            e.printStackTrace();
        }
    }

    public void stopImport() throws InterruptedException {
        this.parser.terminate();
        this.parserThread.join();
    }
}

我现在需要做的是区分主语，谓语和宾语的类型但问题是我不知道它们是哪种类型以及我必须如何使用 valuefactory创建类型并将Statement添加到我的SailConnection。不幸的是我无法找到一个如何使用它的例子。

也许以前有人做过，知道如何继续。

Answer 1

我想你需要从Jena对象类型转换为芝麻对象类型并使用

不受支持的项目https://github.com/afs/JenaSesame可能有一些代码。

但混合使用Jena和Sesame似乎会让事情变得更复杂 - 您是否考虑使用Sesame解析器并获取可以进入SailConnection的Sesame对象？

使用Tinkerpop / bluebrints将三元组导入OrientDB

1 个答案: