Hi,

I found the code to do it. Hope it helps


import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Set;

import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.apache.wink.client.ClientResponse;
import org.eclipse.lyo.client.exception.JazzAuthErrorException;
import org.eclipse.lyo.client.exception.JazzAuthFailedException;
import org.eclipse.lyo.client.exception.ResourceNotFoundException;
import org.eclipse.lyo.client.exception.RootServicesException;
import org.eclipse.lyo.client.oslc.OSLCConstants;
import org.eclipse.lyo.client.oslc.jazz.JazzFormAuthClient;
import org.eclipse.lyo.client.oslc.jazz.JazzRootServicesHelper;
import org.eclipse.lyo.client.oslc.resources.OslcQuery;
import org.eclipse.lyo.client.oslc.resources.OslcQueryParameters;
import org.eclipse.lyo.client.oslc.resources.Requirement;
import org.eclipse.lyo.oslc4j.core.model.OslcMediaType;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import net.oauth.OAuthException;


public class GetUriFromIdentifier {

    public static void main(String[] args) throws Exception{
        // TODO Auto-generated method stub
        FileInputStream fileInputStream= new FileInputStream(new File("./configuration.properties"));
        Properties properties= new Properties();
        properties.load(fileInputStream);
       
        String serverUrl=             properties.getProperty("repositoryUrl");
        String userName=              properties.getProperty("username");
        String password=              properties.getProperty("password");
        String projectAreaName=     properties.getProperty("paName");
        String gcStreamID= properties.getProperty("gcStreamID");
       
        String src_artifact_Id="6259";
        String target_artifact_Ids="678340, 689720";
       
        String[] target_Ids=target_artifact_Ids.split(",");
       
        GetUriFromIdentifier object = new GetUriFromIdentifier();
       
        JazzRootServicesHelper helper = new JazzRootServicesHelper(serverUrl, OSLCConstants.OSLC_RM_V2);
       
        JazzFormAuthClient client= helper.initFormClient(userName, password, serverUrl);
       
        if(client.formLogin()==200){
            System.out.println("Log-in SUCCESS!");
        }else{
            //System.out.println("Log-in status:"+client.formLogin());
        }
       
        String catalogUrl= helper.getCatalogUrl();
        //System.out.println("Catalog Url:\n"+catalogUrl);
       
        String serviceProviderUrl1=client.lookupServiceProviderUrl(catalogUrl, projectAreaName);
        //System.out.println("Service provider url:\n"+serviceProviderUrl1);
       
        String queryCapabilityUrl= client.lookupQueryCapability(serviceProviderUrl1, OSLCConstants.OSLC_RM_V2, OSLCConstants.RM_REQUIREMENT_TYPE);
        //System.out.println("Query capability url:\n"+queryCapabilityUrl);
       
        String requirementFactory = client.lookupCreationFactory(serviceProviderUrl1, OSLCConstants.OSLC_RM_V2, OSLCConstants.RM_REQUIREMENT_TYPE);
        //System.out.println("RF:\n"+requirementFactory);
       
        String src_arti_uri= object.getArtifactURIs(userName, password, serverUrl, projectAreaName, src_artifact_Id, client, queryCapabilityUrl, gcStreamID);
       
        String[] links= new String[target_Ids.length];
       
        for(int i=0;i<target_Ids.length;i++){
            links[i]=object.getArtifactURIs(userName, password, serverUrl, projectAreaName, target_Ids[i].trim(), client, queryCapabilityUrl, gcStreamID);
        }
       
        ClientResponse response = client.getResource(src_arti_uri , OslcMediaType.APPLICATION_RDF_XML);
        String etag = response.getHeaders().getFirst(OSLCConstants.ETAG);
       
        Requirement requirement= response.getEntity(Requirement.class);
       
        Map<QName, Object> getMap= requirement.getExtendedProperties();
       
        String namespaceURI="http://bosch.com/dng/link-type/";
        String localPart="Satisfaction";
        String prefix="j.0";
       
        QName defaultQName= new QName(namespaceURI, localPart, prefix);
       
        ArrayList<URI> satisfiesLinksList=new ArrayList<URI>();
       
        URI oneLink;
        ArrayList<String> arrayList= new ArrayList<>();
        if(getMap.containsKey(defaultQName)){
            if(getMap.get(defaultQName) instanceof URI){
                oneLink=(URI)getMap.get(defaultQName);
                satisfiesLinksList.add(oneLink);
            }else{
            satisfiesLinksList=(ArrayList<URI>)getMap.get(defaultQName);
            }
           
        }
        for(String link: links){
            satisfiesLinksList.add(new URI(link));
        }
       
        getMap.put(defaultQName, satisfiesLinksList);
       
       
        requirement.setExtendedProperties(getMap);
       
        ClientResponse updateResponse= client.updateResource(src_arti_uri , (Object)requirement, OslcMediaType.APPLICATION_RDF_XML, OslcMediaType.APPLICATION_RDF_XML, etag);
        System.out.println("Status: "+updateResponse.getStatusCode());
   
    }




    public String getArtifactURIs(String username, String password, String serverURL, String projectAreaName,
            String artifactId, JazzFormAuthClient client, String queryCapabilityUrl, String stream) throws Exception {
        // TODO Auto-generated method stub
       
        OslcQueryParameters queryParams = new OslcQueryParameters();
       
        queryParams.setPrefix("dcterms=<http://purl.org/dc/terms/>");
        queryParams.setWhere("dcterms:identifier="+artifactId);
        //queryParams.setSelect("dcterms:title");
       
        OslcQuery query = new OslcQuery(client, queryCapabilityUrl, 10, queryParams);
       
        Map<String, String> headers = new HashMap<>();
        headers.put("oslc.configuration",stream);
           
        String url=query.getQueryUrl();
       
        ClientResponse response = client.getResource(url, headers);
       
        InputStream inputStream = response.getEntity(InputStream.class);
       
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        Document doc = db.parse(inputStream);
        doc.getDocumentElement().normalize();
       
        String[] uris = null;
       
        if(doc != null)
        {
            NodeList nList = doc.getElementsByTagName("oslc_rm:Requirement");
            if(nList.getLength()==0){
                nList = doc.getElementsByTagName("oslc_rm:RequirementCollection");
            }
            uris=new String[nList.getLength()];
            for (int i = 0; i < nList.getLength(); i++)
            {
                Node nNode = nList.item(i);
                Element eElement = (Element) nNode;
               
                String uri=eElement.getAttribute("rdf:about");
                uris[i]=uri;
            }
           
        }
   
        return uris[0];
       
    }
}