org.glom.web.client.activity.DocumentSelectionActivity.java Source code

Introduction

Here is the source code for org.glom.web.client.activity.DocumentSelectionActivity.java

Source

/*
 * Copyright (C) 2011 Openismus GmbH
 *
 * This file is part of GWT-Glom.
 *
 * GWT-Glom is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * GWT-Glom is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with GWT-Glom.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.glom.web.client.activity;

import org.glom.web.client.ClientFactory;
import org.glom.web.client.OnlineGlomServiceAsync;
import org.glom.web.client.ui.DocumentSelectionView;
import org.glom.web.client.ui.View;
import org.glom.web.shared.Documents;

import com.google.gwt.activity.shared.AbstractActivity;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.place.shared.Place;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.AcceptsOneWidget;

public class DocumentSelectionActivity extends AbstractActivity implements View.Presenter {

    // TODO inject with GIN
    private final ClientFactory clientFactory;
    private final DocumentSelectionView documentSelectionView;

    public DocumentSelectionActivity(final ClientFactory clientFactory) {
        this.clientFactory = clientFactory;
        this.documentSelectionView = clientFactory.getDocumentSelectionView();
    }

    @Override
    public void start(final AcceptsOneWidget panel, final EventBus eventBus) {
        Window.setTitle("Online Glom");

        documentSelectionView.setPresenter(this);

        final AsyncCallback<Documents> callback = new AsyncCallback<Documents>() {
            @Override
            public void onFailure(final Throwable caught) {
                // Try to get an error message. Most likely this won't work but it's worth a try.
                GWT.log("AsyncCallback Failed: OnlineGlomService.getDocuments(): " + caught.getMessage());
                getAndSetErrorMessage();
            }

            @Override
            public void onSuccess(final Documents documents) {
                documentSelectionView.clearHyperLinks();
                if (documents.getCount() > 0) {
                    for (int i = 0; i < documents.getCount(); i++) {
                        documentSelectionView.addDocumentLink(documents.getDocumentID(i), documents.getTitle(i));
                        // TODO: Get default locale.
                    }
                } else {
                    getAndSetErrorMessage();
                }
            }
        };
        OnlineGlomServiceAsync.Util.getInstance().getDocuments(callback);

        panel.setWidget(documentSelectionView.asWidget());
    }

    @Override
    public void goTo(final Place place) {
        clientFactory.getPlaceController().goTo(place);
    }

    private void getAndSetErrorMessage() {

        final AsyncCallback<String> callback = new AsyncCallback<String>() {
            @Override
            public void onFailure(final Throwable caught) {
                GWT.log("AsyncCallback Failed: OnlineGlomService.getConfigurationErrorMessage(): "
                        + caught.getMessage());
                documentSelectionView.setErrorMessage(
                        "Unable to communicate with the servlet. Check the error log for more information.");
            }

            @Override
            public void onSuccess(final String errorMessage) {
                documentSelectionView.setErrorMessage("Configuration Error: " + errorMessage);
            }
        };
        OnlineGlomServiceAsync.Util.getInstance().getConfigurationErrorMessage(callback);

    }
}