将文件从文件系统复制到项目并正确管理进度监视器

Question

I am trying to modify that answer for my needs and to make the progress monitor reflect the progress correctly. My approach till now:

import org.eclipse.core.runtime.SubProgressMonitor;

private void configureProject(IProgressMonitor monitor)
    throws CoreException, IOException
{
    try
    {
        URL templatesURL = Activator.getDefault().getBundle().getEntry(TEMPLATES);
        File templatesFolder = new File(FileLocator.toFileURL(templatesURL).getPath());
        int fileCount = getElementsCount(templatesFolder);

        monitor.beginTask("Creating file structure for new project...", fileCount + 5);

        project.getFolder(P_SRC).delete(true, new SubProgressMonitor(monitor, 1));
        project.getFolder(P_BIN).delete(true, new SubProgressMonitor(monitor, 1));

        copyFiles(templatesFolder, project, new SubProgressMonitor(monitor, fileCount));
        project.getFile(P_TOUCH).delete(true, new SubProgressMonitor(monitor, 1));

        IClasspathEntry[] newEntries = new IClasspathEntry[3];
        newEntries[0] = JavaCore.newSourceEntry(getCreatedElement().getPath().append(SRC_MAIN));
        newEntries[1] = JavaCore.newSourceEntry(getCreatedElement().getPath().append(SRC_RES),
                                                EXCLUDE_ALL);
        newEntries[2] = JavaCore.newSourceEntry(getCreatedElement().getPath().append(SRC_TEST));
        javaProject.setRawClasspath(newEntries, new SubProgressMonitor(monitor, 2));
    }
    finally
    {
        if (!monitor.isCanceled())
            monitor.done();
    }
}


private int getElementsCount(File file)
{
    // return number of files and folders in the file
}

As you see I have 3 ticks for delete operations and 2 for setting the classpath. This is 5 plus count of the files in the source folder, if I say: 1 tick per file or folder. Now I have a problem with the method copyFiles . I modified the related code to work with IProgressMonitor :

private void copyFiles(File srcFolder, IContainer destFolder, IProgressMonitor monitor)
    throws CoreException, IOException
{
    for (File f : srcFolder.listFiles())
    {
        if (f.isDirectory())
        {
            IFolder newFolder = destFolder.getFolder(new Path(f.getName()));
            newFolder.create(true, true, new SubProgressMonitor(monitor, 1));
            copyFiles(f, newFolder, monitor);
        }
        else
        {
            newFile.create(new FileInputStream(f), true, new SubProgressMonitor(monitor, 1));
        }
    }
}

As soon one of the methods create(...) is called (either on IFile or on IFolder ) the progress bar should be moved by 1 tick. But it doesn't move at all. What could be the reason and how to solve the problem?

upd : I modified the method configureProject as follows:

SubProgressMonitor copyFilesMonitor = new SubProgressMonitor(monitor, fileCount);
copyFilesMonitor.beginTask("Copying files...", fileCount);
copyFiles(templatesFolder, project, copyFilesMonitor);
copyFilesMonitor.done();

Now the problem is that after an invocation of create() (either on IFolder or on IFile ) the progressbar is set to 2/3 - 2 ticks. 2/3 is designated for the whole configureProject() method and the last 2 ticks are to made by setRawClasspath(...) yet.

Before:

After:

Answer 1

You need to call beginTask (and done ) on the new SubProgressMonitor(monitor, fileCount) that you are creating for the copyFiles method.

If you don't call beginTask the worked calls are ignored.