EDIT

package eu.etaxonomy.taxeditor.update;

import java.net.URI;

import java.net.URISyntaxException;

import java.util.ArrayList;

import java.util.List;

import org.eclipse.equinox.internal.p2.ui.ProvUI;

import org.eclipse.equinox.internal.p2.ui.model.ElementUtils;

import org.eclipse.equinox.internal.p2.ui.model.MetadataRepositoryElement;

import org.eclipse.equinox.p2.repository.IRepository;

import org.eclipse.equinox.p2.repository.IRepositoryManager;

import org.eclipse.equinox.p2.repository.metadata.IMetadataRepositoryManager;

import org.eclipse.equinox.p2.ui.ProvisioningUI;

import eu.etaxonomy.taxeditor.TaxonomicEditorPlugin;

import eu.etaxonomy.taxeditor.model.MessagingUtils;

import eu.etaxonomy.taxeditor.preference.PreferencesUtil;

import eu.etaxonomy.taxeditor.util.ApplicationUtil;

/**

 * This class is a utility class for updating the editor from a p2 update site,

 * greatly inspired by the links given below.

 *

 *

 * To Do :

 * - Allow configurable update sites

 *

 * Notes :

 *

 *

 * @see http://wiki.eclipse.org/Equinox/p2/Adding_Self-Update_to_an_RCP_Application

 * @see http://bugs.eclipse.org/281226

 * @see http://www.vogella.com/tutorials/EclipseP2Update/article.html

 */

public class P2Util {

    //private static String LOCAL_UPDATE_SITE = "file:///path/.../to/Development/EDIT/taxeditor/eu.etaxonomy.taxeditor/target/repository/";

    private static String EDIT_NIGHTLY_UPDATE_SITE = "http://cybertaxonomy.eu/download/taxeditor/update/nightly/";

    private static String EDIT_NIGHTLY_UPDATE_SITE_NAME = "Taxonomic Editor Nightly";

    private static String EDIT_SNAPSHOT_UPDATE_SITE = "http://cybertaxonomy.eu/download/taxeditor/update/snapshot/";

    private static String EDIT_SNAPSHOT_UPDATE_SITE_NAME = "Taxonomic Editor Snapshot";

    private static String EDIT_STABLE_UPDATE_SITE = "http://cybertaxonomy.eu/download/taxeditor/update/stable/";

    private static String EDIT_STABLE_UPDATE_SITE_NAME = "Taxonomic Editor Stable";

    /**

     * Retrieve and load the saved list of repositories from the preference store,

     * making sure that at least the default repository is always loaded.

     */

    @SuppressWarnings("restriction")

    public static void setP2UpdateRepositories() {

        String updateSite = EDIT_NIGHTLY_UPDATE_SITE;

        String updateSiteName = EDIT_NIGHTLY_UPDATE_SITE_NAME;

        if(ApplicationUtil.isStable()) {

            updateSite = EDIT_STABLE_UPDATE_SITE;

            updateSiteName = EDIT_STABLE_UPDATE_SITE_NAME;

        }

        List<MetadataRepositoryElement> repoElements = new ArrayList<MetadataRepositoryElement>();

        List<MetadataRepositoryElement> savedRepoElements = PreferencesUtil.getP2Repositories();

        if(savedRepoElements.isEmpty()) {

            // we always need an update site, so we add the default one

            try {

                MetadataRepositoryElement element = new MetadataRepositoryElement(null, new URI(updateSite), true);

                element.setNickname(updateSiteName);

                repoElements.add(element);

            } catch (URISyntaxException e) {

                MessagingUtils.errorDialog("Invalid update site URI",

                        P2Util.class,

                        "The update site URI has an invalid syntax",

                        TaxonomicEditorPlugin.PLUGIN_ID,

                        e,

                        false);

            }

        }

        repoElements.addAll(savedRepoElements);

        ElementUtils.updateRepositoryUsingElements(ProvisioningUI.getDefaultUI(),repoElements

                .toArray(new MetadataRepositoryElement[]{} ));

    }

    /**

     * {@link org.eclipse.equinox.p2.ui.RepositoryManipulationPage} which handles the repsitory site list

     * in preferences does not create a preference store and hence the changes are not saved. This means

     * that we need to save it ourselves.

     *

     * This method saves the list of current repositories in the preference store as a string with

     * specific delimiters.

     */

    public static void saveP2RepositoryPreferences() {

        IMetadataRepositoryManager metaManager = ProvUI.getMetadataRepositoryManager(ProvisioningUI.getDefaultUI().getSession());

        URI[] currentlyEnabled = metaManager.getKnownRepositories(IRepositoryManager.REPOSITORIES_ALL);

        URI[] currentlyDisabled = metaManager.getKnownRepositories(IRepositoryManager.REPOSITORIES_DISABLED);

        List<MetadataRepositoryElement> repoElements = new ArrayList<MetadataRepositoryElement>();

        for(URI repo : currentlyEnabled) {

            boolean enabled = true;

            String nickname = metaManager.getRepositoryProperty(repo, IRepository.PROP_NICKNAME);

            MetadataRepositoryElement element = new MetadataRepositoryElement(null, repo, true);

            element.setNickname(nickname);

            element.setEnabled(enabled);

            repoElements.add(element);

        }

        for(URI repo : currentlyDisabled) {

            boolean enabled = false;

            String nickname = metaManager.getRepositoryProperty(repo, IRepository.PROP_NICKNAME);

            MetadataRepositoryElement element = new MetadataRepositoryElement(null, repo, true);

            element.setNickname(nickname);

            element.setEnabled(enabled);

            repoElements.add(element);

        }

        PreferencesUtil.setP2Repositories(repoElements);

    }

}