gov.redhawk.ide.ui.wizard.RedhawkImportWizardPage1.java Source code

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/*******************************************************************************
 * This file is protected by Copyright. 
 * Please refer to the COPYRIGHT file distributed with this source distribution.
 *
 * This file is part of REDHAWK IDE.
 *
 * 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
 *******************************************************************************/
/*******************************************************************************
 * Much of the code included in this page is based off of the Eclipse "Import Existing Project Wizard"
 * Please see the attached copyright for more information
 *******************************************************************************/
/*******************************************************************************
 * Copyright (c) 2004, 2009 IBM Corporation and others.
 * 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
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Red Hat, Inc - extensive changes to allow importing of Archive Files
 *     Philippe Ombredanne (pombredanne@nexb.com)
 *           - Bug 101180 [Import/Export] Import Existing Project into Workspace default widget is back button , should be text field
 *     Martin Oberhuber (martin.oberhuber@windriver.com)
 *           - Bug 187318[Wizards] "Import Existing Project" loops forever with cyclic symbolic links
 *     Remy Chi Jian Suen  (remy.suen@gmail.com)
 *           - Bug 210568 [Import/Export] [Import/Export] - Refresh button does not update list of projects
 *******************************************************************************/

package gov.redhawk.ide.ui.wizard;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;

import javax.xml.stream.XMLStreamException;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.layout.PixelConverter;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.CheckStateChangedEvent;
import org.eclipse.jface.viewers.CheckboxTreeViewer;
import org.eclipse.jface.viewers.ICheckStateListener;
import org.eclipse.jface.viewers.IColorProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkingSet;
import org.eclipse.ui.IWorkingSetManager;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.WorkspaceModifyOperation;
import org.eclipse.ui.dialogs.IOverwriteQuery;
import org.eclipse.ui.dialogs.WorkingSetGroup;
import org.eclipse.ui.internal.ide.IDEWorkbenchMessages;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
import org.eclipse.ui.internal.ide.StatusUtil;
import org.eclipse.ui.internal.wizards.datatransfer.ArchiveFileManipulations;
import org.eclipse.ui.internal.wizards.datatransfer.DataTransferMessages;
import org.eclipse.ui.internal.wizards.datatransfer.ILeveledImportStructureProvider;
import org.eclipse.ui.internal.wizards.datatransfer.TarEntry;
import org.eclipse.ui.internal.wizards.datatransfer.TarException;
import org.eclipse.ui.internal.wizards.datatransfer.TarFile;
import org.eclipse.ui.internal.wizards.datatransfer.TarLeveledStructureProvider;
import org.eclipse.ui.internal.wizards.datatransfer.ZipLeveledStructureProvider;
import org.eclipse.ui.statushandlers.StatusManager;
import org.eclipse.ui.wizards.datatransfer.FileSystemStructureProvider;
import org.eclipse.ui.wizards.datatransfer.ImportOperation;

/**
 * The WizardProjectsImportPage is the page that allows the user to import
 * projects from a particular location.
 */
/**
 * @since 9.1
 */
@SuppressWarnings("restriction")
public class RedhawkImportWizardPage1 extends WizardPage implements IOverwriteQuery {

    /**
     * The name of the folder containing metadata information for the workspace.
     */
    public static final String METADATA_FOLDER = ".metadata"; //$NON-NLS-1$

    /**
     * The import structure provider.
     * 
     * @since 3.4
     */
    private ILeveledImportStructureProvider structureProvider;

    /**
     * @since 3.5
     * 
     */
    private final class ProjectLabelProvider extends LabelProvider implements IColorProvider {

        public String getText(Object element) {
            return ((ProjectRecord) element).getProjectLabel();
        }

        public Color getBackground(Object element) {
            return null;
        }

        public Color getForeground(Object element) {
            ProjectRecord projectRecord = (ProjectRecord) element;
            if (projectRecord.hasConflicts) {
                return getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY);
            }
            return null;
        }
    }

    /**
     * Class declared public only for test suite.
     * 
     */
    // CHECKSTYLE:OFF
    public class ProjectRecord {
        File projectSystemFile;

        Object projectArchiveFile;

        String projectName;

        Object parent;

        String sourceFile;

        int level;

        boolean hasConflicts;

        boolean missingFiles;

        boolean missingArchiveFiles;

        /**
         * Field is only instantiated if users use the second page of the REDHAWK import wizard
         * Map that records the template of each implementation language
         */
        private Map<String, String> template = new HashMap<String, String>();

        IProjectDescription description;

        // CHECKSTYLE:ON

        /**
         * Create a record for a project based on the info in the file.
         * 
         * @param file
         */
        ProjectRecord(File file) {
            projectSystemFile = file;
            setProjectName();
        }

        /**
         * @param file
         * The Object representing the .project file
         * @param parent
         * The parent folder of the .project file
         * @param level
         * The number of levels deep in the provider the file is
         * @param sourceFile
         */
        ProjectRecord(Object file, Object parent, int level, String sourceFile) {
            this.projectArchiveFile = file;
            this.parent = parent;
            this.level = level;
            this.sourceFile = sourceFile;
            setProjectName();
        }

        /**
         * Set the name of the project based on the projectFile.
         */
        private void setProjectName() {
            try {
                if (projectArchiveFile != null) {
                    InputStream stream = structureProvider.getContents(projectArchiveFile);
                    IPath path = null;
                    if (projectArchiveFile instanceof TarEntry) {
                        path = new Path(((TarEntry) projectArchiveFile).getName());
                    } else if (projectArchiveFile instanceof ZipEntry) {
                        path = new Path(((ZipEntry) projectArchiveFile).getName());
                    }
                    if (stream == null || isNonEclipseProject(path.toFile().getName())) {
                        // If stream is null or .project file is missing use the directory name as the project name
                        if (projectArchiveFile instanceof ZipEntry) {
                            projectName = path.segment(path.segmentCount() - 2);
                        } else if (projectArchiveFile instanceof TarEntry) {
                            projectName = path.segment(path.segmentCount() - 2);
                        }
                        if (isNonEclipseProject(path.toFile().getName())) {
                            missingArchiveFiles = true;
                        }
                    } else {
                        // If we can get a description pull the name from there
                        description = IDEWorkbenchPlugin.getPluginWorkspace().loadProjectDescription(stream);
                        stream.close();
                        projectName = description.getName();
                    }

                }
                // If we don't have the project name try again
                if (projectName == null) {
                    IPath path = new Path(projectSystemFile.getPath());
                    if (isNonEclipseProject(path.toFile().getName())) {
                        // If there is no .project file, use the file name as the project name
                        projectName = RedhawkImportFileUtil.getName(path);
                        missingFiles = true;
                    } else if (isDefaultLocation(path)) {
                        // if the file is in the default location, use the directory name as the project name
                        projectName = path.segment(path.segmentCount() - 2);
                        description = IDEWorkbenchPlugin.getPluginWorkspace().newProjectDescription(projectName);
                    } else {
                        description = IDEWorkbenchPlugin.getPluginWorkspace().loadProjectDescription(path);
                        projectName = description.getName();
                    }
                }
            } catch (CoreException e) {
                IDEWorkbenchPlugin.log(e.getMessage(), e);
                return;
            } catch (IOException e) {
                return;
            } catch (XMLStreamException e) {
                return;
            }
        }

        /**
         * Returns whether the given project description file path is in the
         * default location for a project
         * 
         * @param path
         * The path to examine
         * @return Whether the given path is the default location for a project
         */
        private boolean isDefaultLocation(IPath path) {
            // The project description file must at least be within the project,
            // which is within the workspace location
            if (path.segmentCount() < 2) {
                return false;
            }
            return path.removeLastSegments(2).toFile().equals(Platform.getLocation().toFile());
        }

        /**
         * Get the name of the project
         * 
         * @return String
         */
        public String getProjectName() {
            return projectName;
        }

        /**
         * Gets the label to be used when rendering this project record in the
         * UI.
         * 
         * @return String the label
         * @since 3.4
         */
        public String getProjectLabel() {
            String path = (projectSystemFile == null) ? structureProvider.getLabel(parent)
                    : projectSystemFile.getParent();

            return NLS.bind(DataTransferMessages.WizardProjectsImportPage_projectLabel, projectName, path);
        }

        /**
         * @return Returns the hasConflicts.
         */
        public boolean hasConflicts() {
            return hasConflicts;
        }

        public Map<String, String> getTemplate() {
            return template;
        }
    } // End of inner class ProjectRecord

    // dialog store id constants
    private static final String STORE_COPY_PROJECT_ID = "WizardProjectsImportPage.STORE_COPY_PROJECT_ID"; //$NON-NLS-1$

    private static final String STORE_ARCHIVE_SELECTED = "WizardProjectsImportPage.STORE_ARCHIVE_SELECTED"; //$NON-NLS-1$

    private Text directoryPathField;

    private CheckboxTreeViewer projectsList;

    private Button copyCheckbox;

    private boolean copyFiles = false;

    private boolean lastCopyFiles = false;

    private ProjectRecord[] selectedProjects = new ProjectRecord[0];

    // Keep track of the directory that we browsed to last time
    // the wizard was invoked.
    private static String previouslyBrowsedDirectory = ""; //$NON-NLS-1$

    // Keep track of the archive that we browsed to last time
    // the wizard was invoked.
    private static String previouslyBrowsedArchive = ""; //$NON-NLS-1$

    // SCA file type extensions
    private static String sadExtension = ".+\\.sad.xml";
    private static String spdExtension = ".+\\.spd.xml";
    private static String dcdExtension = ".+\\.dcd.xml";

    private Button projectFromDirectoryRadio;

    private Button projectFromArchiveRadio;

    private Text archivePathField;

    private Button browseDirectoriesButton;

    private Button browseArchivesButton;

    private IProject[] wsProjects;

    private List<IProject> createdProjects;

    // constant from WizardArchiveFileResourceImportPage1
    private static final String[] FILE_IMPORT_MASK = { "*.jar;*.zip;*.tar;*.tar.gz;*.tgz", "*.*" }; //$NON-NLS-1$ //$NON-NLS-2$

    // The initial path to set
    private String initialPath;

    // The last selected path to minimize searches
    private String lastPath;
    // The last time that the file or folder at the selected path was modified
    // to mimize searches
    private long lastModified;

    private WorkingSetGroup workingSetGroup;

    private IStructuredSelection currentSelection;

    private boolean archiveSelected;

    /**
     * Creates a new project creation wizard page.
     * 
     */
    public RedhawkImportWizardPage1() {
        this("redhawkImportWizard", null, null); //$NON-NLS-1$
    }

    public boolean isNonEclipseProject(String path) {
        if (path.matches(sadExtension) || path.matches(dcdExtension) || path.matches(spdExtension)) {
            return true;
        }
        return false;
    }

    /**
     * Create a new instance of the receiver.
     * 
     * @param pageName
     */
    public RedhawkImportWizardPage1(String pageName) {
        this(pageName, null, null);
    }

    /**
     * More (many more) parameters.
     * 
     * @param pageName
     * @param initialPath
     * @param currentSelection
     * @since 3.5
     */
    public RedhawkImportWizardPage1(String pageName, String initialPath, IStructuredSelection currentSelection) {
        super(pageName);
        this.initialPath = initialPath;
        this.currentSelection = currentSelection;
        setPageComplete(false);
        setTitle(DataTransferMessages.WizardProjectsImportPage_ImportProjectsTitle);
        setDescription("Select a directory to search for existing Eclipse projects. "
                + "Wizard will attempt to generate missing metadata files. Projects missing source files may exhibit unexpected behavior.");
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets
     * .Composite)
     */
    public void createControl(Composite parent) {

        initializeDialogUnits(parent);

        Composite workArea = new Composite(parent, SWT.NONE);
        setControl(workArea);

        workArea.setLayout(new GridLayout());
        workArea.setLayoutData(
                new GridData(GridData.FILL_BOTH | GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL));

        createProjectsRoot(workArea);
        createProjectsList(workArea);
        createOptionsArea(workArea);
        createWorkingSetGroup(workArea);
        restoreWidgetValues();
        Dialog.applyDialogFont(workArea);

    }

    /**
     * @param workArea
     */
    private void createWorkingSetGroup(Composite workArea) {
        String[] workingSetIds = new String[] { "org.eclipse.ui.resourceWorkingSetPage", //$NON-NLS-1$
                "org.eclipse.jdt.ui.JavaWorkingSetPage" }; //$NON-NLS-1$
        workingSetGroup = new WorkingSetGroup(workArea, currentSelection, workingSetIds);
    }

    /**
     * Create the area with the extra options.
     * 
     * @param workArea
     */
    private void createOptionsArea(Composite workArea) {
        Composite optionsGroup = new Composite(workArea, SWT.NONE);
        optionsGroup.setLayout(new GridLayout());
        optionsGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        copyCheckbox = new Button(optionsGroup, SWT.CHECK);
        copyCheckbox.setText(DataTransferMessages.WizardProjectsImportPage_CopyProjectsIntoWorkspace);
        copyCheckbox.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        copyCheckbox.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                copyFiles = copyCheckbox.getSelection();
            }
        });
    }

    /**
     * Create the checkbox list for the found projects.
     * 
     * @param workArea
     */
    private void createProjectsList(Composite workArea) {

        Label title = new Label(workArea, SWT.NONE);
        title.setText(DataTransferMessages.WizardProjectsImportPage_ProjectsListTitle);

        Composite listComposite = new Composite(workArea, SWT.NONE);
        GridLayout layout = new GridLayout();
        layout.numColumns = 2;
        layout.marginWidth = 0;
        layout.makeColumnsEqualWidth = false;
        listComposite.setLayout(layout);

        listComposite.setLayoutData(
                new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.FILL_BOTH));

        projectsList = new CheckboxTreeViewer(listComposite, SWT.BORDER);
        GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
        gridData.widthHint = new PixelConverter(projectsList.getControl()).convertWidthInCharsToPixels(25);
        gridData.heightHint = new PixelConverter(projectsList.getControl()).convertHeightInCharsToPixels(10);
        projectsList.getControl().setLayoutData(gridData);
        projectsList.setContentProvider(new ITreeContentProvider() {

            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java
             * .lang.Object)
             */
            public Object[] getChildren(Object parentElement) {
                return null;
            }

            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.jface.viewers.IStructuredContentProvider#getElements
             * (java.lang.Object)
             */
            public Object[] getElements(Object inputElement) {
                return getProjectRecords();
            }

            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java
             * .lang.Object)
             */
            public boolean hasChildren(Object element) {
                return false;
            }

            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.jface.viewers.ITreeContentProvider#getParent(java
             * .lang.Object)
             */
            public Object getParent(Object element) {
                return null;
            }

            /*
             * (non-Javadoc)
             * 
             * @see org.eclipse.jface.viewers.IContentProvider#dispose()
             */
            public void dispose() {

            }

            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse
             * .jface.viewers.Viewer, java.lang.Object, java.lang.Object)
             */
            public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
            }

        });

        projectsList.setLabelProvider(new ProjectLabelProvider());

        projectsList.addCheckStateListener(new ICheckStateListener() {
            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.jface.viewers.ICheckStateListener#checkStateChanged
             * (org.eclipse.jface.viewers.CheckStateChangedEvent)
             */
            public void checkStateChanged(CheckStateChangedEvent event) {
                ProjectRecord element = (ProjectRecord) event.getElement();
                if (element.hasConflicts) {
                    projectsList.setChecked(element, false);
                }
                setPageComplete(projectsList.getCheckedElements().length > 0);
            }
        });

        projectsList.setInput(this);
        projectsList.setComparator(new ViewerComparator());
        createSelectionButtons(listComposite);
    }

    /**
     * Create the selection buttons in the listComposite.
     * 
     * @param listComposite
     */
    private void createSelectionButtons(Composite listComposite) {
        Composite buttonsComposite = new Composite(listComposite, SWT.NONE);
        GridLayout layout = new GridLayout();
        layout.marginWidth = 0;
        layout.marginHeight = 0;
        buttonsComposite.setLayout(layout);

        buttonsComposite.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING));

        Button selectAll = new Button(buttonsComposite, SWT.PUSH);
        selectAll.setText(DataTransferMessages.DataTransfer_selectAll);
        selectAll.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                for (int i = 0; i < selectedProjects.length; i++) {
                    if (selectedProjects[i].hasConflicts) {
                        projectsList.setChecked(selectedProjects[i], false);
                    } else {
                        projectsList.setChecked(selectedProjects[i], true);
                    }
                }
                setPageComplete(projectsList.getCheckedElements().length > 0);
            }
        });
        Dialog.applyDialogFont(selectAll);
        setButtonLayoutData(selectAll);

        Button deselectAll = new Button(buttonsComposite, SWT.PUSH);
        deselectAll.setText(DataTransferMessages.DataTransfer_deselectAll);
        deselectAll.addSelectionListener(new SelectionAdapter() {
            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse
             * .swt.events.SelectionEvent)
             */
            public void widgetSelected(SelectionEvent e) {

                projectsList.setCheckedElements(new Object[0]);
                setPageComplete(false);
            }
        });
        Dialog.applyDialogFont(deselectAll);
        setButtonLayoutData(deselectAll);

        Button refresh = new Button(buttonsComposite, SWT.PUSH);
        refresh.setText(DataTransferMessages.DataTransfer_refresh);
        refresh.addSelectionListener(new SelectionAdapter() {
            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse
             * .swt.events.SelectionEvent)
             */
            public void widgetSelected(SelectionEvent e) {
                if (projectFromDirectoryRadio.getSelection()) {
                    updateProjectsList(directoryPathField.getText().trim());
                } else {
                    updateProjectsList(archivePathField.getText().trim());
                }
            }
        });
        Dialog.applyDialogFont(refresh);
        setButtonLayoutData(refresh);
    }

    /**
     * Create the area where you select the root directory for the projects.
     * 
     * @param workArea
     * Composite
     */
    private void createProjectsRoot(Composite workArea) {

        // project specification group
        Composite projectGroup = new Composite(workArea, SWT.NONE);
        GridLayout layout = new GridLayout();
        layout.numColumns = 3;
        layout.makeColumnsEqualWidth = false;
        layout.marginWidth = 0;
        projectGroup.setLayout(layout);
        projectGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        // new project from directory radio button
        projectFromDirectoryRadio = new Button(projectGroup, SWT.RADIO);
        projectFromDirectoryRadio.setText(DataTransferMessages.WizardProjectsImportPage_RootSelectTitle);

        // project location entry field
        this.directoryPathField = new Text(projectGroup, SWT.BORDER);

        GridData directoryPathData = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL);
        directoryPathData.widthHint = new PixelConverter(directoryPathField).convertWidthInCharsToPixels(25);
        directoryPathField.setLayoutData(directoryPathData);

        // browse button
        browseDirectoriesButton = new Button(projectGroup, SWT.PUSH);
        browseDirectoriesButton.setText(DataTransferMessages.DataTransfer_browse);
        setButtonLayoutData(browseDirectoriesButton);

        // new project from archive radio button
        projectFromArchiveRadio = new Button(projectGroup, SWT.RADIO);
        projectFromArchiveRadio.setText(DataTransferMessages.WizardProjectsImportPage_ArchiveSelectTitle);

        // project location entry field
        archivePathField = new Text(projectGroup, SWT.BORDER);

        GridData archivePathData = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL);
        archivePathData.widthHint = new PixelConverter(archivePathField).convertWidthInCharsToPixels(25);
        archivePathField.setLayoutData(archivePathData);

        // browse button
        browseArchivesButton = new Button(projectGroup, SWT.PUSH);
        browseArchivesButton.setText(DataTransferMessages.DataTransfer_browse);
        setButtonLayoutData(browseArchivesButton);

        projectFromDirectoryRadio.setSelection(true);
        archivePathField.setEnabled(false);
        browseArchivesButton.setEnabled(false);

        browseDirectoriesButton.addSelectionListener(new SelectionAdapter() {
            /*
             * (non-Javadoc)
             * 
             * @see org.eclipse.swt.events.SelectionAdapter#widgetS
             * elected(org.eclipse.swt.events.SelectionEvent)
             */
            public void widgetSelected(SelectionEvent e) {
                handleLocationDirectoryButtonPressed();
            }

        });

        browseArchivesButton.addSelectionListener(new SelectionAdapter() {
            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse
             * .swt.events.SelectionEvent)
             */
            public void widgetSelected(SelectionEvent e) {
                handleLocationArchiveButtonPressed();
            }

        });

        directoryPathField.addTraverseListener(new TraverseListener() {

            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.swt.events.TraverseListener#keyTraversed(org.eclipse
             * .swt.events.TraverseEvent)
             */
            public void keyTraversed(TraverseEvent e) {
                if (e.detail == SWT.TRAVERSE_RETURN) {
                    e.doit = false;
                    updateProjectsList(directoryPathField.getText().trim());
                }
            }

        });

        directoryPathField.addFocusListener(new FocusAdapter() {

            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.swt.events.FocusListener#focusLost(org.eclipse.swt
             * .events.FocusEvent)
             */
            public void focusLost(org.eclipse.swt.events.FocusEvent e) {
                updateProjectsList(directoryPathField.getText().trim());
            }

        });

        archivePathField.addTraverseListener(new TraverseListener() {

            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.swt.events.TraverseListener#keyTraversed(org.eclipse
             * .swt.events.TraverseEvent)
             */
            public void keyTraversed(TraverseEvent e) {
                if (e.detail == SWT.TRAVERSE_RETURN) {
                    e.doit = false;
                    updateProjectsList(archivePathField.getText().trim());
                }
            }

        });

        archivePathField.addFocusListener(new FocusAdapter() {
            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.swt.events.FocusListener#focusLost(org.eclipse.swt
             * .events.FocusEvent)
             */
            public void focusLost(org.eclipse.swt.events.FocusEvent e) {
                updateProjectsList(archivePathField.getText().trim());
            }
        });

        projectFromDirectoryRadio.addSelectionListener(new SelectionAdapter() {
            /*
             * (non-Javadoc) ProjectRecord
             * 
             * @see
             * org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse
             * .swt.events.SelectionEvent)
             */
            public void widgetSelected(SelectionEvent e) {
                directoryRadioSelected();
            }
        });

        projectFromArchiveRadio.addSelectionListener(new SelectionAdapter() {
            /*
             * (non-Javadoc)
             * 
             * @see
             * org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse
             * .swt.events.SelectionEvent)
             */
            public void widgetSelected(SelectionEvent e) {
                archiveRadioSelected();
            }
        });
    }

    private void archiveRadioSelected() {
        if (projectFromArchiveRadio.getSelection()) {
            directoryPathField.setEnabled(false);
            browseDirectoriesButton.setEnabled(false);
            archivePathField.setEnabled(true);
            browseArchivesButton.setEnabled(true);
            updateProjectsList(archivePathField.getText());
            archivePathField.setFocus();
            copyCheckbox.setSelection(true);
            copyCheckbox.setEnabled(false);
            archiveSelected = true;
            canFlipToNextPage();
        }
    }

    @Override
    public boolean canFlipToNextPage() {
        if (archiveSelected) {
            return false;
        } else {
            return super.canFlipToNextPage();
        }
    }

    private void directoryRadioSelected() {
        if (projectFromDirectoryRadio.getSelection()) {
            directoryPathField.setEnabled(true);
            browseDirectoriesButton.setEnabled(true);
            archivePathField.setEnabled(false);
            browseArchivesButton.setEnabled(false);
            updateProjectsList(directoryPathField.getText());
            directoryPathField.setFocus();
            copyCheckbox.setEnabled(true);
            copyCheckbox.setSelection(copyFiles);
        }
    }

    /*
     * (non-Javadoc) Method declared on IDialogPage. Set the focus on path
     * fields when page becomes visible.
     */
    public void setVisible(boolean visible) {
        super.setVisible(visible);
        if (visible && this.projectFromDirectoryRadio.getSelection()) {
            this.directoryPathField.setFocus();
        }
        if (visible && this.projectFromArchiveRadio.getSelection()) {
            this.archivePathField.setFocus();
        }
    }

    /**
     * Update the list of projects based on path. Method declared public only
     * for test suite.
     * 
     * @param path
     */
    public void updateProjectsList(final String path) {
        // on an empty path empty selectedProjects
        if (path == null || path.length() == 0) {
            setMessage(DataTransferMessages.WizardProjectsImportPage_ImportProjectsDescription);
            selectedProjects = new ProjectRecord[0];
            projectsList.refresh(true);
            projectsList.setCheckedElements(selectedProjects);
            setPageComplete(projectsList.getCheckedElements().length > 0);
            lastPath = path;
            return;
        }

        final File directory = new File(path);
        long modified = directory.lastModified();
        if (path.equals(lastPath) && lastModified == modified && lastCopyFiles == copyFiles) {
            // since the file/folder was not modified and the path did not
            // change, no refreshing is required
            return;
        }

        lastPath = path;
        lastModified = modified;
        lastCopyFiles = copyFiles;

        // We can't access the radio button from the inner class so get the
        // status beforehand
        final boolean dirSelected = this.projectFromDirectoryRadio.getSelection();
        try {
            getContainer().run(true, true, new IRunnableWithProgress() {

                /*
                 * (non-Javadoc)
                 * 
                 * @see
                 * org.eclipse.jface.operation.IRunnableWithProgress#run(org
                 * .eclipse.core.runtime.IProgressMonitor)
                 */
                public void run(IProgressMonitor monitor) {
                    monitor.beginTask(DataTransferMessages.WizardProjectsImportPage_SearchingMessage, 100);
                    selectedProjects = new ProjectRecord[0];
                    Collection<Object> files = new ArrayList<Object>();
                    monitor.worked(10);
                    if (!dirSelected && ArchiveFileManipulations.isTarFile(path)) {
                        TarFile sourceTarFile = getSpecifiedTarSourceFile(path);
                        if (sourceTarFile == null) {
                            return;
                        }

                        structureProvider = new TarLeveledStructureProvider(sourceTarFile);
                        Object child = structureProvider.getRoot();

                        if (!collectProjectFilesFromProvider(files, child, 0, monitor, path)) {
                            return;
                        }

                        Iterator<Object> filesIterator = files.iterator();
                        selectedProjects = new ProjectRecord[files.size()];
                        int index = 0;
                        monitor.worked(50);
                        monitor.subTask(DataTransferMessages.WizardProjectsImportPage_ProcessingMessage);
                        while (filesIterator.hasNext()) {
                            selectedProjects[index++] = (ProjectRecord) filesIterator.next();
                        }
                    } else if (!dirSelected && ArchiveFileManipulations.isZipFile(path)) {
                        ZipFile sourceZipFile = getSpecifiedZipSourceFile(path);
                        if (sourceZipFile == null) {
                            return;
                        }
                        structureProvider = new ZipLeveledStructureProvider(sourceZipFile);
                        Object child = structureProvider.getRoot();

                        if (!collectProjectFilesFromProvider(files, child, 0, monitor, path)) {
                            return;
                        }
                        Iterator<Object> filesIterator = files.iterator();
                        selectedProjects = new ProjectRecord[files.size()];
                        int index = 0;
                        monitor.worked(50);
                        monitor.subTask(DataTransferMessages.WizardProjectsImportPage_ProcessingMessage);
                        while (filesIterator.hasNext()) {
                            selectedProjects[index++] = (ProjectRecord) filesIterator.next();
                        }
                    } else if (dirSelected && directory.isDirectory()) {
                        // returns false if no .project, spd, sad, or dcd files are found
                        if (!collectProjectFilesFromDirectory(files, directory, null, monitor)) {
                            return;
                        }
                        Iterator<Object> filesIterator = files.iterator();
                        selectedProjects = new ProjectRecord[files.size()];
                        int index = 0;
                        monitor.worked(50);
                        monitor.subTask(DataTransferMessages.WizardProjectsImportPage_ProcessingMessage);
                        while (filesIterator.hasNext()) {
                            File file = (File) filesIterator.next();
                            selectedProjects[index] = new ProjectRecord(file);
                            index++;
                        }
                    } else {
                        monitor.worked(60);
                    }
                    monitor.done();
                }

            });
        } catch (InvocationTargetException e) {
            IDEWorkbenchPlugin.log(e.getMessage(), e);
        } catch (InterruptedException e) {
            IDEWorkbenchPlugin.log(e.getMessage(), e);
        }

        projectsList.refresh(true);
        ProjectRecord[] projects = getProjectRecords();
        boolean displayWarning = false;
        if (projects != null && projects.length > 0) {
            for (int i = 0; i < projects.length; i++) {
                if (projects[i].hasConflicts) {
                    displayWarning = true;
                    projectsList.setGrayed(projects[i], true);
                } else {
                    projectsList.setChecked(projects[i], true);
                }
            }
            setPageComplete(true);
        }

        if (displayWarning) {
            setMessage(DataTransferMessages.WizardProjectsImportPage_projectsInWorkspace, WARNING);
        } else {
            setMessage(DataTransferMessages.WizardProjectsImportPage_ImportProjectsDescription);
        }
        setPageComplete(projectsList.getCheckedElements().length > 0);
        if (selectedProjects.length == 0) {
            setMessage(DataTransferMessages.WizardProjectsImportPage_noProjectsToImport, WARNING);
        }
    }

    /**
     * Answer a handle to the zip file currently specified as being the source.
     * Return null if this file does not exist or is not of valid format.
     */
    private ZipFile getSpecifiedZipSourceFile(String fileName) {
        if (fileName.length() == 0) {
            return null;
        }

        try {
            return new ZipFile(fileName);
        } catch (ZipException e) {
            displayErrorDialog(DataTransferMessages.ZipImport_badFormat);
        } catch (IOException e) {
            displayErrorDialog(DataTransferMessages.ZipImport_couldNotRead);
        }

        archivePathField.setFocus();
        return null;
    }

    /**
     * Answer a handle to the zip file currently specified as being the source.
     * Return null if this file does not exist or is not of valid format.
     */
    private TarFile getSpecifiedTarSourceFile(String fileName) {
        if (fileName.length() == 0) {
            return null;
        }

        try {
            return new TarFile(fileName);
        } catch (TarException e) {
            displayErrorDialog(DataTransferMessages.TarImport_badFormat);
        } catch (IOException e) {
            displayErrorDialog(DataTransferMessages.ZipImport_couldNotRead);
        }

        archivePathField.setFocus();
        return null;
    }

    /**
     * Display an error dialog with the specified message.
     * 
     * @param message
     * the error message
     */
    protected void displayErrorDialog(String message) {
        MessageDialog.open(MessageDialog.ERROR, getContainer().getShell(), getErrorDialogTitle(), message,
                SWT.SHEET);
    }

    /**
     * Get the title for an error dialog. Subclasses should override.
     */
    protected String getErrorDialogTitle() {
        return IDEWorkbenchMessages.WizardExportPage_internalErrorTitle;
    }

    /**
     * Collect the list of .project files that are under directory into files.
     * 
     * @param files
     * @param directory
     * @param directoriesVisited
     * Set of canonical paths of directories, used as recursion guard
     * @param monitor
     * The monitor to report to
     * @return boolean <code>true</code> if the operation was completed.
     */
    private boolean collectProjectFilesFromDirectory(Collection<Object> files, File directory,
            Set<String> directoriesVisited, IProgressMonitor monitor) {

        if (monitor.isCanceled()) {
            return false;
        }
        monitor.subTask(
                NLS.bind(DataTransferMessages.WizardProjectsImportPage_CheckingMessage, directory.getPath()));
        File[] contents = directory.listFiles();
        if (contents == null) {
            return false;
        }

        // Initialize recursion guard for recursive symbolic links
        if (directoriesVisited == null) {
            directoriesVisited = new HashSet<String>();
            try {
                directoriesVisited.add(directory.getCanonicalPath());
            } catch (IOException exception) {
                StatusManager.getManager()
                        .handle(StatusUtil.newStatus(IStatus.ERROR, exception.getLocalizedMessage(), exception));
            }
        }

        // first look for project description files
        final String dotProject = IProjectDescription.DESCRIPTION_FILE_NAME;
        for (int i = 0; i < contents.length; i++) {
            File file = contents[i];
            if (file.isFile() && file.getName().equals(dotProject)) {
                files.add(file);
                // don't search sub-directories since we can't have nested
                // projects
                return true;
            }
        }
        // if project description files are not found look for SCA specific file names
        for (int i = 0; i < contents.length; i++) {
            File file = contents[i];
            if (file.isFile() && file.getName().matches(sadExtension)) {
                // handle waveform projects that are missing a .project file
                files.add(file);
                return true;
            }
            if (file.isFile() && file.getName().matches(dcdExtension)) {
                // handle node projects that are missing a .project file
                files.add(file);
                return true;
            }
            if (file.isFile() && file.getName().matches(spdExtension)) {
                // handle component projects that are missing a .project file
                files.add(file);
                return true;
            }
        }

        // no project description found, so recurse into sub-directories
        for (int i = 0; i < contents.length; i++) {
            if (contents[i].isDirectory()) {
                if (!contents[i].getName().equals(METADATA_FOLDER)) {
                    try {
                        String canonicalPath = contents[i].getCanonicalPath();
                        if (!directoriesVisited.add(canonicalPath)) {
                            // already been here --> do not recurse
                            continue;
                        }
                    } catch (IOException exception) {
                        StatusManager.getManager().handle(
                                StatusUtil.newStatus(IStatus.ERROR, exception.getLocalizedMessage(), exception));

                    }
                    collectProjectFilesFromDirectory(files, contents[i], directoriesVisited, monitor);
                }
            }
        }
        return true;
    }

    /**
     * Collect the list of .project files that are under directory into files.
     * 
     * @param files
     * @param monitor
     * The monitor to report to
     * @param sourceFile
     * @return boolean <code>true</code> if the operation was completed.
     */
    private boolean collectProjectFilesFromProvider(Collection<Object> files, Object entry, int level,
            IProgressMonitor monitor, String sourceFile) {
        if (monitor.isCanceled()) {
            return false;
        }
        monitor.subTask(NLS.bind(DataTransferMessages.WizardProjectsImportPage_CheckingMessage,
                structureProvider.getLabel(entry)));
        List<?> children = structureProvider.getChildren(entry);
        if (children == null) {
            children = new ArrayList<Object>(1);
        }

        boolean dotProjectFound = false;
        Iterator<?> childrenEnum = children.iterator();
        while (childrenEnum.hasNext()) {
            Object child = childrenEnum.next();
            if (structureProvider.isFolder(child)) {
                collectProjectFilesFromProvider(files, child, level + 1, monitor, sourceFile);
            }
            String elementLabel = structureProvider.getLabel(child);
            if (elementLabel.equals(IProjectDescription.DESCRIPTION_FILE_NAME)) {
                files.add(new ProjectRecord(child, entry, level, sourceFile));
                dotProjectFound = true;
            }
        }
        // If no .project file is found, loop back through looking for a spd, sad, or dcd file to use
        if (!dotProjectFound) {
            childrenEnum = children.iterator();
            while (childrenEnum.hasNext()) {
                Object child = childrenEnum.next();
                String elementLabel = structureProvider.getLabel(child);
                if (elementLabel.matches(sadExtension) || elementLabel.matches(spdExtension)
                        || elementLabel.matches(dcdExtension)) {
                    files.add(new ProjectRecord(child, entry, level, sourceFile));
                }
            }
        }
        return true;
    }

    /**
     * The browse button has been selected. Select the location.
     */
    protected void handleLocationDirectoryButtonPressed() {

        DirectoryDialog dialog = new DirectoryDialog(directoryPathField.getShell(), SWT.SHEET);
        dialog.setMessage(DataTransferMessages.WizardProjectsImportPage_SelectDialogTitle);

        String dirName = directoryPathField.getText().trim();
        if (dirName.length() == 0) {
            dirName = previouslyBrowsedDirectory;
        }

        if (dirName.length() == 0) {
            dialog.setFilterPath(IDEWorkbenchPlugin.getPluginWorkspace().getRoot().getLocation().toOSString());
        } else {
            File path = new File(dirName);
            if (path.exists()) {
                dialog.setFilterPath(new Path(dirName).toOSString());
            }
        }

        String selectedDirectory = dialog.open();
        if (selectedDirectory != null) {
            previouslyBrowsedDirectory = selectedDirectory;
            directoryPathField.setText(previouslyBrowsedDirectory);
            updateProjectsList(selectedDirectory);
        }

    }

    /**
     * The browse button has been selected. Select the location.
     */
    protected void handleLocationArchiveButtonPressed() {

        FileDialog dialog = new FileDialog(archivePathField.getShell(), SWT.SHEET);
        dialog.setFilterExtensions(FILE_IMPORT_MASK);
        dialog.setText(DataTransferMessages.WizardProjectsImportPage_SelectArchiveDialogTitle);

        String fileName = archivePathField.getText().trim();
        if (fileName.length() == 0) {
            fileName = previouslyBrowsedArchive;
        }

        if (fileName.length() == 0) {
            dialog.setFilterPath(IDEWorkbenchPlugin.getPluginWorkspace().getRoot().getLocation().toOSString());
        } else {
            File path = new File(fileName).getParentFile();
            if (path != null && path.exists()) {
                dialog.setFilterPath(path.toString());
            }
        }

        String selectedArchive = dialog.open();
        if (selectedArchive != null) {
            previouslyBrowsedArchive = selectedArchive;
            archivePathField.setText(previouslyBrowsedArchive);
            updateProjectsList(selectedArchive);
        }

    }

    /**
     * Create the selected projects
     * 
     * @return boolean <code>true</code> if all project creations were
     * successful.
     */
    public boolean createProjects() {
        saveWidgetValues();
        final RedhawkImportWizardPage1 parent = this;
        final Object[] selected = projectsList.getCheckedElements();
        createdProjects = new ArrayList<IProject>();
        WorkspaceModifyOperation op = new WorkspaceModifyOperation() {
            protected void execute(IProgressMonitor monitor)
                    throws InvocationTargetException, InterruptedException {
                try {
                    monitor.beginTask("", selected.length); //$NON-NLS-1$
                    if (monitor.isCanceled()) {
                        throw new OperationCanceledException();
                    }
                    for (int i = 0; i < selected.length; i++) {
                        ProjectRecord project = (ProjectRecord) selected[i];
                        if (project.missingFiles) {
                            new RedhawkImportFileUtil().createMissingFiles(project, monitor, copyFiles, parent);
                        } else if (project.missingArchiveFiles) {
                            new RedhawkImportArchiveUtil().createMissingFiles(project, monitor, parent,
                                    structureProvider);
                        } else {
                            createExistingProject(project, new SubProgressMonitor(monitor, 1));
                        }
                    }
                } finally {
                    monitor.done();
                }
            }
        };
        // run the new project creation operation
        try {
            getContainer().run(true, true, op);
        } catch (InterruptedException e) {
            return false;
        } catch (InvocationTargetException e) {
            // one of the steps resulted in a core exception
            Throwable t = e.getTargetException();
            String message = DataTransferMessages.WizardExternalProjectImportPage_errorMessage;
            IStatus status;
            if (t instanceof CoreException) {
                status = new Status(((CoreException) t).getStatus().getSeverity(), IDEWorkbenchPlugin.IDE_WORKBENCH,
                        t.getLocalizedMessage(), t);
            } else {
                status = new Status(IStatus.ERROR, IDEWorkbenchPlugin.IDE_WORKBENCH, 1, message, t);
            }
            ErrorDialog.openError(getShell(), message, null, status);
            return false;
        }
        ArchiveFileManipulations.closeStructureProvider(structureProvider, getShell());

        // Adds the projects to the working sets
        addToWorkingSets();

        return true;
    }

    private void addToWorkingSets() {

        IWorkingSet[] selectedWorkingSets = workingSetGroup.getSelectedWorkingSets();
        if (selectedWorkingSets == null || selectedWorkingSets.length == 0) {
            return; // no Working set is selected
        }
        IWorkingSetManager workingSetManager = PlatformUI.getWorkbench().getWorkingSetManager();
        for (Iterator<IProject> i = createdProjects.iterator(); i.hasNext();) {
            IProject project = (IProject) i.next();
            workingSetManager.addToWorkingSets(project, selectedWorkingSets);
        }
    }

    /**
     * Performs clean-up if the user cancels the wizard without doing anything
     */
    public void performCancel() {
        ArchiveFileManipulations.closeStructureProvider(structureProvider, getShell());
    }

    /**
     * Create the project described in record. If it is successful return true.
     * 
     * @param record
     * @return boolean <code>true</code> if successful
     * @throws InterruptedException
     */
    private boolean createExistingProject(final ProjectRecord record, IProgressMonitor monitor)
            throws InvocationTargetException, InterruptedException {
        String projectName = record.getProjectName();
        final IWorkspace workspace = ResourcesPlugin.getWorkspace();
        final IProject project = workspace.getRoot().getProject(projectName);
        createdProjects.add(project);
        if (record.description == null) {
            // error case
            record.description = workspace.newProjectDescription(projectName);
            IPath locationPath = new Path(record.projectSystemFile.getAbsolutePath());

            // If it is under the root use the default location
            if (Platform.getLocation().isPrefixOf(locationPath)) {
                record.description.setLocation(null);
            } else {
                record.description.setLocation(locationPath);
            }
        } else {
            record.description.setName(projectName);
        }
        if (record.projectArchiveFile != null) {
            // import from archive
            List<?> fileSystemObjects = structureProvider.getChildren(record.parent);
            structureProvider.setStrip(record.level);
            ImportOperation operation = new ImportOperation(project.getFullPath(), structureProvider.getRoot(),
                    structureProvider, this, fileSystemObjects);
            operation.setContext(getShell());
            operation.run(monitor);
            return true;
        }
        // import from file system
        File importSource = null;
        if (copyFiles) {
            // import project from location copying files - use default project
            // location for this workspace
            URI locationURI = record.description.getLocationURI();
            // if location is null, project already exists in this location or
            // some error condition occured.
            if (locationURI != null) {
                // validate the location of the project being copied
                IStatus result = ResourcesPlugin.getWorkspace().validateProjectLocationURI(project, locationURI);
                if (!result.isOK()) {
                    throw new InvocationTargetException(new CoreException(result));
                }
                importSource = new File(locationURI);
                IProjectDescription desc = workspace.newProjectDescription(projectName);
                desc.setBuildSpec(record.description.getBuildSpec());
                desc.setComment(record.description.getComment());
                desc.setDynamicReferences(record.description.getDynamicReferences());
                desc.setNatureIds(record.description.getNatureIds());
                desc.setReferencedProjects(record.description.getReferencedProjects());
                record.description = desc;
            }
        }

        try {
            monitor.beginTask(DataTransferMessages.WizardProjectsImportPage_CreateProjectsTask, 100);
            project.create(record.description, new SubProgressMonitor(monitor, 30));
            project.open(IResource.BACKGROUND_REFRESH, new SubProgressMonitor(monitor, 70));
        } catch (CoreException e) {
            throw new InvocationTargetException(e);
        } finally {
            monitor.done();
        }

        // import operation to import project files if copy checkbox is selected
        if (copyFiles && importSource != null) {
            List<?> filesToImport = FileSystemStructureProvider.INSTANCE.getChildren(importSource);
            ImportOperation operation = new ImportOperation(project.getFullPath(), importSource,
                    FileSystemStructureProvider.INSTANCE, this, filesToImport);
            operation.setContext(getShell());
            operation.setOverwriteResources(true); // need to overwrite
            // .project, .classpath
            // files
            operation.setCreateContainerStructure(false);
            operation.run(monitor);
        }

        return true;
    }

    /**
     * The <code>WizardDataTransfer</code> implementation of this
     * <code>IOverwriteQuery</code> method asks the user whether the existing
     * resource at the given path should be overwritten.
     * 
     * @param pathString
     * @return the user's reply: one of <code>"YES"</code>, <code>"NO"</code>,
     * <code>"ALL"</code>, or <code>"CANCEL"</code>
     */
    public String queryOverwrite(String pathString) {

        Path path = new Path(pathString);

        String messageString;
        // Break the message up if there is a file name and a directory
        // and there are at least 2 segments.
        if (path.getFileExtension() == null || path.segmentCount() < 2) {
            messageString = NLS.bind(IDEWorkbenchMessages.WizardDataTransfer_existsQuestion, pathString);
        } else {
            messageString = NLS.bind(IDEWorkbenchMessages.WizardDataTransfer_overwriteNameAndPathQuestion,
                    path.lastSegment(), path.removeLastSegments(1).toOSString());
        }

        final MessageDialog dialog = new MessageDialog(getContainer().getShell(), IDEWorkbenchMessages.Question,
                null, messageString, MessageDialog.QUESTION,
                new String[] { IDialogConstants.YES_LABEL, IDialogConstants.YES_TO_ALL_LABEL,
                        IDialogConstants.NO_LABEL, IDialogConstants.NO_TO_ALL_LABEL,
                        IDialogConstants.CANCEL_LABEL },
                0) {
            protected int getShellStyle() {
                return super.getShellStyle() | SWT.SHEET;
            }
        };
        String[] response = new String[] { YES, ALL, NO, NO_ALL, CANCEL };
        // run in syncExec because callback is from an operation,
        // which is probably not running in the UI thread.
        getControl().getDisplay().syncExec(new Runnable() {
            public void run() {
                dialog.open();
            }
        });
        return (dialog.getReturnCode() < 0) ? CANCEL : response[dialog.getReturnCode()];
    }

    /**
     * Method used for test suite.
     * 
     * @return Button the Import from Directory RadioButton
     */
    public Button getProjectFromDirectoryRadio() {
        return projectFromDirectoryRadio;
    }

    /**
     * Method used for test suite.
     * 
     * @return CheckboxTreeViewer the viewer containing all the projects found
     */
    public CheckboxTreeViewer getProjectsList() {
        return projectsList;
    }

    /**
     * Retrieve all the projects in the current workspace.
     * 
     * @return IProject[] array of IProject in the current workspace
     */
    private IProject[] getProjectsInWorkspace() {
        if (wsProjects == null) {
            wsProjects = IDEWorkbenchPlugin.getPluginWorkspace().getRoot().getProjects();
        }
        return wsProjects;
    }

    /**
     * Get the array of project records that can be imported from the source
     * workspace or archive, selected by the user. If a project with the same
     * name exists in both the source workspace and the current workspace, then
     * the hasConflicts flag would be set on that project record.
     * 
     * Method declared public for test suite.
     * 
     * @return ProjectRecord[] array of projects that can be imported into the
     * workspace
     */
    public ProjectRecord[] getProjectRecords() {
        List<ProjectRecord> projectRecords = new ArrayList<ProjectRecord>();
        for (int i = 0; i < selectedProjects.length; i++) {
            if ((isProjectInWorkspacePath(selectedProjects[i].getProjectName()) && copyFiles)
                    || isProjectInWorkspace(selectedProjects[i].getProjectName())) {
                selectedProjects[i].hasConflicts = true;
            }
            projectRecords.add(selectedProjects[i]);
        }
        return (ProjectRecord[]) projectRecords.toArray(new ProjectRecord[projectRecords.size()]);
    }

    /**
     * Determine if there is a directory with the project name in the workspace
     * path.
     * 
     * @param projectName
     * the name of the project
     * @return true if there is a directory with the same name of the imported
     * project
     */
    private boolean isProjectInWorkspacePath(String projectName) {
        final IWorkspace workspace = ResourcesPlugin.getWorkspace();
        IPath wsPath = workspace.getRoot().getLocation();
        IPath localProjectPath = wsPath.append(projectName);
        return localProjectPath.toFile().exists();
    }

    /**
     * Determine if the project with the given name is in the current workspace.
     * 
     * @param projectName
     * String the project name to check
     * @return boolean true if the project with the given name is in this
     * workspace
     */
    private boolean isProjectInWorkspace(String projectName) {
        if (projectName == null) {
            return false;
        }
        IProject[] workspaceProjects = getProjectsInWorkspace();
        for (int i = 0; i < workspaceProjects.length; i++) {
            if (projectName.equals(workspaceProjects[i].getName())) {
                return true;
            }
        }
        return false;
    }

    /**
     * Use the dialog store to restore widget values to the values that they
     * held last time this wizard was used to completion, or alternatively, if
     * an initial path is specified, use it to select values.
     * 
     * Method declared public only for use of tests.
     */
    public void restoreWidgetValues() {

        // First, check to see if we have resore settings, and
        // take care of the checkbox
        IDialogSettings settings = getDialogSettings();
        if (settings != null) {
            // checkbox
            copyFiles = settings.getBoolean(STORE_COPY_PROJECT_ID);
            copyCheckbox.setSelection(copyFiles);
            lastCopyFiles = copyFiles;
        }

        // Second, check to see if we don't have an initial path,
        // and if we do have restore settings. If so, set the
        // radio selection properly to restore settings

        if (initialPath == null && settings != null) {
            // radio selection
            archiveSelected = settings.getBoolean(STORE_ARCHIVE_SELECTED);
            projectFromDirectoryRadio.setSelection(!archiveSelected);
            projectFromArchiveRadio.setSelection(archiveSelected);
            if (archiveSelected) {
                archiveRadioSelected();
            } else {
                directoryRadioSelected();
            }
        } else if (initialPath != null) {
            // Third, if we do have an initial path, set the proper
            // path and radio buttons to the initial value. Move
            // cursor to the end of the path so user can see the
            // most relevant part (directory / archive name)

            boolean dir = new File(initialPath).isDirectory();

            projectFromDirectoryRadio.setSelection(dir);
            projectFromArchiveRadio.setSelection(!dir);

            if (dir) {
                directoryPathField.setText(initialPath);
                directoryPathField.setSelection(initialPath.length());
                directoryRadioSelected();
            } else {
                archivePathField.setText(initialPath);
                archivePathField.setSelection(initialPath.length());
                archiveRadioSelected();
            }
        }
    }

    /**
     * Since Finish was pressed, write widget values to the dialog store so that
     * they will persist into the next invocation of this wizard page.
     * 
     * Method declared public only for use of tests.
     */
    public void saveWidgetValues() {
        IDialogSettings settings = getDialogSettings();
        if (settings != null) {
            settings.put(STORE_COPY_PROJECT_ID, copyCheckbox.getSelection());

            settings.put(STORE_ARCHIVE_SELECTED, projectFromArchiveRadio.getSelection());
        }
    }

    /**
     * Method used for test suite.
     * 
     * @return Button copy checkbox
     */
    public Button getCopyCheckbox() {
        return copyCheckbox;
    }
}