edu.stanford.bmir.protege.web.client.ui.projectmanager.ProjectRevisionConverter.java Source code

Introduction

Here is the source code for edu.stanford.bmir.protege.web.client.ui.projectmanager.ProjectRevisionConverter.java

Source

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package edu.stanford.bmir.protege.web.client.ui.projectmanager;

import edu.stanford.bmir.protege.web.shared.project.ProjectId;
import edu.stanford.bmir.protege.web.shared.revision.RevisionNumber;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.gwt.core.client.GWT;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.URL;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.Response;
import com.google.gwt.user.client.Window;

/**
 *
 * @author antonio
 */
public class ProjectRevisionConverter {
    private final ProjectId projectid;

    private final RevisionNumber revisionnumber;

    public ProjectRevisionConverter(ProjectId projectid, RevisionNumber revisionnumber) {
        this.projectid = checkNotNull(projectid);
        this.revisionnumber = checkNotNull(revisionnumber);
    }

    public void convert() {
        String encodedProjectName = URL.encode(projectid.getId());
        String requestData = "";
        String baseURL = GWT.getHostPageBaseURL();
        String convertURL = baseURL + "convert?ontology=" + encodedProjectName + "&revision="
                + revisionnumber.getValue();
        boolean opened = openedPage();
        //controllo se la pagina  stata aperta da un'altra pagina, in modo da avere un riferimento a cui inviare l'ontologia in RDF/XML
        if (opened == true) { //invio la richiesta alla servlet per ottenere l'ontologia convertita!!!
            RequestBuilder request = new RequestBuilder(RequestBuilder.GET, convertURL);
            try {
                request.sendRequest(requestData.toString(), new RequestCallback() //requestData vuoti poich i parametri di interesse sono gi specificati nell'URL
                {
                    public void onError(Request request, Throwable e) {
                        Window.alert(e.getMessage());
                    }

                    public void onResponseReceived(Request request, Response response) {
                        if (200 == response.getStatusCode()) //controllo che la response sia stata ricevuta in maniera corretta (stato 200)
                        {
                            String convertedProject = new String(response.getText());
                            returnTOtrill(convertedProject); //funzione javascript che invia la stringa ottenuta a TRILL on SWISH
                        } else {
                            Window.alert("Received HTTP status code other than 200 : " + response.getStatusText());
                        }
                    }
                });
            } catch (RequestException e) {
                // Couldn't connect to server
                Window.alert(e.getMessage());
            }
        }
    }

    /* Funzioni javascript utilizzate, scritte seguendo la sintassi di JSNI*/

    private native boolean openedPage()/*-{ 
                                       var Windowreference=$wnd.opener;
                                       if(Windowreference==null)
                                       {
                                       $wnd.alert("devi aprire la pagina da http://localhost:3020/trill_on_swish per utilizzare questa funzionalit");
                                       return false;
                                       }
                                       return true;
                                       }-*/;

    private native void returnTOtrill(String converted)/*-{
                                                       $wnd.opener.postMessage(converted,"http://localhost:3020/trill_on_swish/");
                                                       $wnd.alert("messaggio inviato");
                                                       }-*/;
}