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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.update;
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import java.net.URI;
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import org.eclipse.core.runtime.IStatus;
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import org.eclipse.core.runtime.OperationCanceledException;
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import org.eclipse.equinox.internal.p2.ui.ProvUI;
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import org.eclipse.equinox.internal.p2.ui.dialogs.UpdateSingleIUWizard;
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import org.eclipse.equinox.p2.core.IProvisioningAgent;
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import org.eclipse.equinox.p2.core.ProvisionException;
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import org.eclipse.equinox.p2.operations.ProvisioningSession;
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import org.eclipse.equinox.p2.operations.UpdateOperation;
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import org.eclipse.equinox.p2.repository.IRepositoryManager;
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import org.eclipse.equinox.p2.repository.metadata.IMetadataRepositoryManager;
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import org.eclipse.equinox.p2.ui.LoadMetadataRepositoryJob;
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import org.eclipse.equinox.p2.ui.ProvisioningUI;
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import org.eclipse.jface.dialogs.MessageDialog;
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import org.eclipse.jface.wizard.WizardDialog;
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import org.eclipse.ui.IWorkbench;
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import org.eclipse.ui.PlatformUI;
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import org.osgi.framework.BundleContext;
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import org.osgi.framework.ServiceReference;
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import eu.etaxonomy.taxeditor.TaxonomicEditorPlugin;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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/**
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 * UpdateHandler invokes the check for updates UI
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 *
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 */
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public class UpdateHandler extends PreloadingRepositoryHandler {
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    @Override
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    protected void doExecute(LoadMetadataRepositoryJob job) {
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        //UpdateOperation operation = new UpdateOperation(ProvisioningUI.getDefaultUI().getSession());
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        BundleContext bundleContext = TaxonomicEditorPlugin.getContext();
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        ServiceReference reference = bundleContext.getServiceReference(IProvisioningAgent.SERVICE_NAME);
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        if (reference == null) {
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            MessageDialog.openInformation(
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                    null,
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                    "Information",
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                    "No provisioning agent found.  This application is not set up for updates.");
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            return;
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        }
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        final IProvisioningAgent agent = (IProvisioningAgent) bundleContext.getService(reference);
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        IWorkbench workbench = PlatformUI.getWorkbench();
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        ProvisioningSession session = new ProvisioningSession(agent);
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        // update all user-visible installable units
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        UpdateOperation operation = new UpdateOperation(session);
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        // force refresh all the repository caches before update
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        IMetadataRepositoryManager metaManager = ProvUI.getMetadataRepositoryManager(ProvisioningUI.getDefaultUI().getSession());
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        URI[] repos = metaManager.getKnownRepositories(IRepositoryManager.REPOSITORIES_ALL);
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        for(URI repo : repos) {
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            try {
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                metaManager.refreshRepository(repo, null);
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            } catch (ProvisionException pe) {
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                MessagingUtils.errorDialog("Error reloading repository cache",
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                        this,
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                        pe.getMessage(),
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                        TaxonomicEditorPlugin.PLUGIN_ID,
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                        pe,
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                        true);
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                return;
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            } catch (OperationCanceledException oce) {
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                MessagingUtils.errorDialog("Error reloading repository cache",
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                        this,
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                        oce.getMessage(),
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                        TaxonomicEditorPlugin.PLUGIN_ID,
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                        oce,
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                        true);
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                return;
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            }
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        }
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        // set location of artifact and metadata repo
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        operation.getProvisioningContext().setArtifactRepositories(repos);
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        operation.getProvisioningContext().setMetadataRepositories(repos);
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        IStatus status = operation.resolveModal(null);
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        if (getProvisioningUI().getPolicy().continueWorkingWithOperation(operation, getShell())) {
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            if (UpdateSingleIUWizard.validFor(operation)) {
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                // Special case for only updating a single root
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                UpdateSingleIUWizard wizard = new UpdateSingleIUWizard(getProvisioningUI(), operation);
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                WizardDialog dialog = new WizardDialog(getShell(), wizard);
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                dialog.create();
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                dialog.open();
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            } else {
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                // Open the normal version of the update wizard
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                getProvisioningUI().openUpdateWizard(false, operation, job);
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            }
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        }
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    }
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}
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