org.eclipse.egit.ui.internal.jobs.RepositoryJobResultAction.java Source code

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Here is the source code for org.eclipse.egit.ui.internal.jobs.RepositoryJobResultAction.java

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/*******************************************************************************
 * Copyright (c) 2016 Thomas Wolf <thomas.wolf@paranor.ch>
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *******************************************************************************/
package org.eclipse.egit.ui.internal.jobs;

import java.io.File;
import java.io.IOException;
import java.text.MessageFormat;

import org.eclipse.egit.core.RepositoryCache;
import org.eclipse.egit.ui.Activator;
import org.eclipse.egit.ui.internal.UIText;
import org.eclipse.jface.action.Action;
import org.eclipse.jgit.annotations.NonNull;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryCache.FileKey;
import org.eclipse.jgit.util.FS;

/**
 * An {@link Action} to report some background job result.
 */
public abstract class RepositoryJobResultAction extends Action {

    /**
     * Because this action may be associated with a job and may be invoked long
     * after the repository operation had been performed we do not keep a
     * reference to the {@link Repository} here. The repository might have been
     * deleted in the meantime.
     */
    private final File repositoryDir;

    private boolean repositoryGone;

    /**
     * Creates a new {@link RepositoryJobResultAction}.
     *
     * @param repository
     *            the result belongs to
     * @param title
     *            of the action
     */
    public RepositoryJobResultAction(@NonNull Repository repository, String title) {
        super(title);
        this.repositoryDir = repository.getDirectory();
    }

    @Override
    public final void run() {
        Repository repo = null;
        if (!repositoryGone) {
            RepositoryCache repoCache = org.eclipse.egit.core.Activator.getDefault().getRepositoryCache();
            repo = repoCache.getRepository(repositoryDir);
            if (repo == null && FileKey.isGitRepository(repositoryDir, FS.DETECTED)) {
                // No longer in the Egit cache but still on disk
                try {
                    repo = repoCache.lookupRepository(repositoryDir);
                } catch (IOException e) {
                    // Ignore, repo remains null
                }
            }
            repositoryGone = repo == null;
        }
        if (repositoryGone || repo == null) {
            Activator.showError(
                    MessageFormat.format(UIText.RepositoryJobResultAction_RepositoryGone, repositoryDir), null);
            return;
        }
        showResult(repo);
    }

    /**
     * Shows the job result to the user.
     *
     * @param repository
     *            the result belongs to
     */
    abstract protected void showResult(@NonNull Repository repository);
}