org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarimport/JarImportWizardPage.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005, 2006 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
  *******************************************************************************/
 package org.eclipse.jdt.internal.ui.jarimport;

 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URI;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipFile;

 import org.eclipse.core.filesystem.URIUtil;

 import org.eclipse.core.runtime.Assert;
 import org.eclipse.core.runtime.CoreException;

 import org.eclipse.core.resources.ResourcesPlugin;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 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.FileDialog;
 import org.eclipse.swt.widgets.Label;

 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.viewers.DecoratingLabelProvider;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.StructuredSelection;
 import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.jface.wizard.WizardPage;

 import org.eclipse.ui.PlatformUI;

 import org.eclipse.ltk.core.refactoring.RefactoringCore;

 import org.eclipse.jdt.core.IJavaElement;
 import org.eclipse.jdt.core.IJavaModel;
 import org.eclipse.jdt.core.IJavaProject;
 import org.eclipse.jdt.core.IPackageFragment;
 import org.eclipse.jdt.core.IPackageFragmentRoot;
 import org.eclipse.jdt.core.JavaCore;
 import org.eclipse.jdt.core.JavaModelException;

 import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringDescriptor;

 import org.eclipse.jdt.ui.JavaElementLabelProvider;
 import org.eclipse.jdt.ui.JavaElementSorter;
 import org.eclipse.jdt.ui.ProblemsLabelDecorator;
 import org.eclipse.jdt.ui.StandardJavaElementContentProvider;

 import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
 import org.eclipse.jdt.internal.ui.JavaPlugin;
 import org.eclipse.jdt.internal.ui.filters.EmptyPackageFilter;
 import org.eclipse.jdt.internal.ui.jarpackager.JarPackagerUtil;
 import org.eclipse.jdt.internal.ui.refactoring.binary.BinaryRefactoringHistoryWizard;
 import org.eclipse.jdt.internal.ui.util.SWTUtil;

 /**
  * Jar import wizard page.
  *
  * @since 3.2
  */
 public final class JarImportWizardPage extends WizardPage {

 	/** The jar import wizard page name */
 	private static final String PAGE_NAME= "JarImportWizardPage"; //$NON-NLS-1$

 	/** The history dialog setting */
 	protected static final String SETTING_HISTORY= "org.eclipse.jdt.ui.refactoring.jarHistory"; //$NON-NLS-1$

 	/** Is the wizard page displayed for the first time? */
 	private boolean fFirstTime= true;

 	/** Is the wizard part of an import wizard? */
 	private final boolean fImportWizard;

 	/** The location control */
 	private RefactoringLocationControl fLocationControl= null;

 	/** The java model viewer */
 	private TreeViewer fTreeViewer= null;

 	/** The import wizard */
 	private final JarImportWizard fWizard;

 	/**
 	 * Creates a new jar import wizard page.
 	 *
 	 * @param wizard
 	 *            the jar import wizard
 	 * @param importWizard
 	 *            <code>true</code> if the wizard is part of an import wizard,
 	 *            <code>false</code> otherwise
 	 */
 	public JarImportWizardPage(final JarImportWizard wizard, final boolean importWizard) {
 		super(PAGE_NAME);
 		Assert.isNotNull(wizard);
 		fWizard= wizard;
 		fImportWizard= importWizard;
 		if (fImportWizard) {
 			setTitle(JarImportMessages.JarImportWizardPage_page_title);
 			setDescription(JarImportMessages.JarImportWizardPage_page_description);
 		} else {
 			setTitle(JarImportMessages.JarImportWizardPage_page_replace_title);
 			setDescription(JarImportMessages.JarImportWizardPage_page_replace_description);
 		}
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	public void createControl(final Composite parent) {
 		initializeDialogUnits(parent);
 		final Composite composite= new Composite(parent, SWT.NONE);
 		composite.setLayout(new GridLayout());
 		composite.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL));
 		createLocationGroup(composite);
 		if (fImportWizard)
 			createInputGroup(composite);
 		createRenameGroup(composite);
 		setPageComplete(false);
 		if (fImportWizard && !fTreeViewer.getControl().isEnabled())
 			setErrorMessage(JarImportMessages.JarImportWizardPage_no_jar_files);
 		setControl(composite);
 		Dialog.applyDialogFont(composite);
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(composite, IJavaHelpContextIds.JARIMPORT_WIZARD_PAGE);
 	}

 	/**
 	 * Creates a new grid data.
 	 *
 	 * @param flag
 	 *            the flags to use
 	 * @param hspan
 	 *            the horizontal span
 	 * @param indent
 	 *            the indent
 	 * @return the grid data
 	 */
 	protected GridData createGridData(final int flag, final int hspan, final int indent) {
 		final GridData data= new GridData(flag);
 		data.horizontalIndent= indent;
 		data.horizontalSpan= hspan;
 		return data;
 	}

 	/**
 	 * Creates the input group.
 	 *
 	 * @param parent
 	 *            the parent control
 	 */
 	protected void createInputGroup(final Composite parent) {
 		Assert.isNotNull(parent);
 		new Label(parent, SWT.NONE);
 		final Label label= new Label(parent, SWT.NONE);
 		label.setText(JarImportMessages.JarImportWizardPage_import_message);
 		final StandardJavaElementContentProvider contentProvider= new StandardJavaElementContentProvider() {

 			public Object[] getChildren(Object element) {
 				if ((element instanceof IJavaProject) || (element instanceof IJavaModel))
 					return super.getChildren(element);
 				return new Object[0];
 			}

 			protected Object[] getJavaProjects(final IJavaModel model) throws JavaModelException {
 				final Set set= new HashSet();
 				final IJavaProject[] projects= model.getJavaProjects();
 				for (int index= 0; index < projects.length; index++) {
 					if (JarImportWizard.isValidJavaProject(projects[index])) {
 						final Object[] roots= getPackageFragmentRoots(projects[index]);
 						if (roots.length > 0)
 							set.add(projects[index]);
 					}
 				}
 				return set.toArray();
 			}

 			protected Object[] getPackageFragmentRoots(final IJavaProject project) throws JavaModelException {
 				final Set set= new HashSet();
 				final IPackageFragmentRoot[] roots= project.getPackageFragmentRoots();
 				for (int offset= 0; offset < roots.length; offset++) {
 					if (JarImportWizard.isValidClassPathEntry(roots[offset].getRawClasspathEntry()))
 						set.add(roots[offset]);
 				}
 				return set.toArray();
 			}

 			public boolean hasChildren(final Object element) {
 				return (element instanceof IJavaProject) || (element instanceof IJavaModel);
 			}
 		};

 		final DecoratingLabelProvider labelProvider= new DecoratingLabelProvider(new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_BASICS | JavaElementLabelProvider.SHOW_OVERLAY_ICONS | JavaElementLabelProvider.SHOW_SMALL_ICONS), new ProblemsLabelDecorator());
 		fTreeViewer= new TreeViewer(parent, SWT.SINGLE | SWT.BORDER);
 		fTreeViewer.getTree().setLayoutData(createGridData(GridData.FILL_BOTH, 6, 0));
 		fTreeViewer.setLabelProvider(labelProvider);
 		fTreeViewer.setContentProvider(contentProvider);
 		fTreeViewer.addFilter(new EmptyPackageFilter());
 		fTreeViewer.setSorter(new JavaElementSorter());
 		fTreeViewer.setAutoExpandLevel(2);
 		fTreeViewer.setInput(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()));
 		final IPackageFragmentRoot root= fWizard.getPackageFragmentRoot();
 		if (root != null) {
 			fTreeViewer.setSelection(new StructuredSelection(new Object[] { root}), true);
 			fTreeViewer.expandToLevel(root, 1);
 		}
 		fTreeViewer.addSelectionChangedListener(new ISelectionChangedListener() {

 			public void selectionChanged(final SelectionChangedEvent event) {
 				handleInputChanged();
 			}
 		});
 		if (contentProvider.getChildren(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot())).length == 0) {
 			fTreeViewer.getControl().setEnabled(false);
 			label.setEnabled(false);
 		}
 	}

 	/**
 	 * Creates the location group.
 	 *
 	 * @param parent
 	 *            the parent control
 	 */
 	protected void createLocationGroup(final Composite parent) {
 		Assert.isNotNull(parent);
 		new Label(parent, SWT.NONE).setText(JarImportMessages.JarImportWizardPage_import_label);
 		final Composite composite= new Composite(parent, SWT.NONE);
 		composite.setLayoutData(createGridData(GridData.FILL_HORIZONTAL, 6, 0));
 		composite.setLayout(new GridLayout(3, false));
 		final Label label= new Label(composite, SWT.NONE);
 		label.setText(JarImportMessages.JarImportWizardPage_location_label);
 		label.setLayoutData(createGridData(GridData.HORIZONTAL_ALIGN_BEGINNING, 1, 0));
 		fLocationControl= new RefactoringLocationControl(fWizard, composite, SETTING_HISTORY);
 		fLocationControl.setLayoutData(createGridData(GridData.FILL_HORIZONTAL, 1, 0));
 		fLocationControl.loadHistory();
 		fLocationControl.getControl().addModifyListener(new ModifyListener() {

 			public final void modifyText(final ModifyEvent event) {
 				handleInputChanged();
 			}
 		});
 		fLocationControl.getControl().addSelectionListener(new SelectionAdapter() {

 			public final void widgetSelected(final SelectionEvent event) {
 				handleInputChanged();
 			}
 		});
 		fLocationControl.setFocus();
 		final Button button= new Button(composite, SWT.PUSH);
 		button.setText(JarImportMessages.JarImportWizardPage_browse_button_label);
 		button.setLayoutData(createGridData(GridData.HORIZONTAL_ALIGN_FILL, 1, 0));
 		SWTUtil.setButtonDimensionHint(button);
 		button.addSelectionListener(new SelectionAdapter() {

 			public final void widgetSelected(final SelectionEvent event) {
 				handleBrowseButtonSelected();
 			}
 		});
 	}

 	/**
 	 * Creates the rename group.
 	 *
 	 * @param parent
 	 *            the parent control
 	 */
 	protected void createRenameGroup(final Composite parent) {
 		Assert.isNotNull(parent);
 		final JarImportData data= fWizard.getImportData();
 		final Button button= new Button(parent, SWT.CHECK);
 		button.setText(JarImportMessages.JarImportWizardPage_replace_jar_file);
 		button.setSelection(!data.isRenameJarFile());
 		button.addSelectionListener(new SelectionAdapter() {

 			public void widgetSelected(final SelectionEvent event) {
 				data.setRenameJarFile(!button.getSelection());
 			}
 		});
 		if (fImportWizard && !fTreeViewer.getControl().isEnabled())
 			button.setEnabled(false);
 		if (!fImportWizard) {
 			final GridData gd= new GridData();
 			gd.horizontalIndent= IDialogConstants.HORIZONTAL_MARGIN;
 			button.setLayoutData(gd);
 		}
 	}

 	/**
 	 * Handles the browse button selected event.
 	 */
 	protected void handleBrowseButtonSelected() {
 		final FileDialog file= new FileDialog(getShell(), SWT.OPEN);
 		file.setText(JarImportMessages.JarImportWizardPage_browse_caption);
 		file.setFilterNames(new String[] { "*.jar", "*.*"}); //$NON-NLS-1$ //$NON-NLS-2$
 		file.setFilterExtensions(new String[] { "*.jar", "*.*"}); //$NON-NLS-1$ //$NON-NLS-2$
 		final String path= file.open();
 		if (path != null) {
 			fLocationControl.setText(path);
 			handleInputChanged();
 		}
 	}

 	/**
 	 * Handles the input changed event.
 	 */
 	protected void handleInputChanged() {
 		final JarImportData data= fWizard.getImportData();
 		data.setRefactoringHistory(null);
 		data.setRefactoringFileLocation(null);
 		setErrorMessage(null);
 		setPageComplete(true);
 		handleJarFileChanged();
 		if (isPageComplete())
 			handlePackageFragmentRootChanged();
 		if (fImportWizard && !fTreeViewer.getControl().isEnabled())
 			setErrorMessage(JarImportMessages.JarImportWizardPage_no_jar_files);
 		getContainer().updateButtons();
 	}

 	/**
 	 * Handles the jar file changed event.
 	 */
 	protected void handleJarFileChanged() {
 		if (fLocationControl != null) {
 			final String path= fLocationControl.getText();
 			if ("".equals(path)) { //$NON-NLS-1$
 				if (!fFirstTime)
 					setErrorMessage(JarImportMessages.JarImportWizardPage_empty_location);
 				fFirstTime= false;
 				setPageComplete(false);
 				return;
 			} else {
 				final File file= new File(path);
 				if (!file.exists()) {
 					setErrorMessage(JarImportMessages.JarImportWizardPage_invalid_location);
 					setPageComplete(false);
 					return;
 				}
 				ZipFile zip= null;
 				try {
 					try {
 						zip= new ZipFile(file, ZipFile.OPEN_READ);
 					} catch (IOException exception) {
 						setErrorMessage(JarImportMessages.JarImportWizardPage_invalid_location);
 						setPageComplete(false);
 						return;
 					}
 					final JarImportData data= fWizard.getImportData();
 					data.setRefactoringFileLocation(URIUtil.toURI(path));
 					ZipEntry entry= zip.getEntry(JarPackagerUtil.getRefactoringsEntry());
 					if (entry == null) {
 						setMessage(JarImportMessages.JarImportWizardPage_no_refactorings, INFORMATION);
 						setPageComplete(true);
 						return;
 					}
 					handleTimeStampChanged();
 					if (data.getExistingTimeStamp() > entry.getTime()) {
 						setMessage(JarImportMessages.JarImportWizardPage_version_warning, WARNING);
 						setPageComplete(true);
 						return;
 					}
 					InputStream stream= null;
 					try {
 						stream= zip.getInputStream(entry);
 						data.setRefactoringHistory(RefactoringCore.getHistoryService().readRefactoringHistory(stream, JavaRefactoringDescriptor.JAR_IMPORTABLE | JavaRefactoringDescriptor.JAR_REFACTORABLE));
 					} catch (IOException exception) {
 						setErrorMessage(JarImportMessages.JarImportWizardPage_no_refactorings);
 						setPageComplete(false);
 						return;
 					} catch (CoreException exception) {
 						JavaPlugin.log(exception);
 						setErrorMessage(JarImportMessages.JarImportWizardPage_no_refactorings);
 						setPageComplete(false);
 						return;
 					} finally {
 						if (stream != null) {
 							try {
 								stream.close();
 							} catch (IOException exception) {
 								// Do nothing
 							}
 						}
 					}
 				} finally {
 					if (zip != null) {
 						try {
 							zip.close();
 						} catch (IOException e) {
 						}
 					}
 				}
 			}
 		}
 	}

 	/**
 	 * Handles the package fragment root changed event.
 	 */
 	protected void handlePackageFragmentRootChanged() {
 		if (fTreeViewer != null) {
 			final IStructuredSelection selection= (IStructuredSelection) fTreeViewer.getSelection();
 			final Object[] elements= selection.toArray();
 			if (elements.length != 1) {
 				setErrorMessage(JarImportMessages.JarImportWizardPage_select_single_jar);
 				setPageComplete(false);
 				return;
 			} else {
 				final JarImportData data= fWizard.getImportData();
 				final Object element= elements[0];
 				if (element instanceof IPackageFragmentRoot)
 					data.setPackageFragmentRoot((IPackageFragmentRoot) element);
 				else if (element instanceof IPackageFragment) {
 					data.setPackageFragmentRoot((IPackageFragmentRoot) ((IJavaElement) element).getParent());
 				} else {
 					setErrorMessage(JarImportMessages.JarImportWizardPage_select_single_jar);
 					setPageComplete(false);
 				}
 			}
 		}
 	}

 	/**
 	 * Handles the time stamp changed event.
 	 */
 	protected void handleTimeStampChanged() {
 		final IPackageFragmentRoot root= fWizard.getPackageFragmentRoot();
 		if (root != null) {
 			try {
 				final URI uri= BinaryRefactoringHistoryWizard.getLocationURI(root.getRawClasspathEntry());
 				if (uri != null) {
 					final File file= new File(uri);
 					if (file.exists()) {
 						ZipFile zip= null;
 						try {
 							zip= new ZipFile(file, ZipFile.OPEN_READ);
 							ZipEntry entry= zip.getEntry(JarPackagerUtil.getRefactoringsEntry());
 							if (entry != null) {
 								fWizard.getImportData().setExistingTimeStamp(entry.getTime());
 							}
 						} catch (IOException exception) {
 							// Just leave it
 						} finally {
 							if (zip != null) {
 								try {
 									zip.close();
 								} catch (IOException e) {
 								}
 							}
 						}
 					}
 				}
 			} catch (CoreException exception) {
 				JavaPlugin.log(exception);
 			}
 		}
 	}

 	/**
 	 * Gets called if the wizard is finished.
 	 */
 	public void performFinish() {
 		fLocationControl.saveHistory();
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	public void setVisible(final boolean visible) {
 		super.setVisible(visible);
 		if (visible)
 			handleInputChanged();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005, 2006 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
	*******************************************************************************/
	package org.eclipse.jdt.internal.ui.jarimport;

	import java.io.File;
	import java.io.IOException;
	import java.io.InputStream;
	import java.net.URI;
	import java.util.HashSet;
	import java.util.Set;
	import java.util.zip.ZipEntry;
	import java.util.zip.ZipFile;

	import org.eclipse.core.filesystem.URIUtil;

	import org.eclipse.core.runtime.Assert;
	import org.eclipse.core.runtime.CoreException;

	import org.eclipse.core.resources.ResourcesPlugin;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	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.FileDialog;
	import org.eclipse.swt.widgets.Label;

	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.viewers.DecoratingLabelProvider;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.StructuredSelection;
	import org.eclipse.jface.viewers.TreeViewer;
	import org.eclipse.jface.wizard.WizardPage;

	import org.eclipse.ui.PlatformUI;

	import org.eclipse.ltk.core.refactoring.RefactoringCore;

	import org.eclipse.jdt.core.IJavaElement;
	import org.eclipse.jdt.core.IJavaModel;
	import org.eclipse.jdt.core.IJavaProject;
	import org.eclipse.jdt.core.IPackageFragment;
	import org.eclipse.jdt.core.IPackageFragmentRoot;
	import org.eclipse.jdt.core.JavaCore;
	import org.eclipse.jdt.core.JavaModelException;

	import org.eclipse.jdt.internal.corext.refactoring.JavaRefactoringDescriptor;

	import org.eclipse.jdt.ui.JavaElementLabelProvider;
	import org.eclipse.jdt.ui.JavaElementSorter;
	import org.eclipse.jdt.ui.ProblemsLabelDecorator;
	import org.eclipse.jdt.ui.StandardJavaElementContentProvider;

	import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
	import org.eclipse.jdt.internal.ui.JavaPlugin;
	import org.eclipse.jdt.internal.ui.filters.EmptyPackageFilter;
	import org.eclipse.jdt.internal.ui.jarpackager.JarPackagerUtil;
	import org.eclipse.jdt.internal.ui.refactoring.binary.BinaryRefactoringHistoryWizard;
	import org.eclipse.jdt.internal.ui.util.SWTUtil;

	/**
	* Jar import wizard page.
	*
	* @since 3.2
	*/
	public final class JarImportWizardPage extends WizardPage {

	/** The jar import wizard page name */
	private static final String PAGE_NAME= "JarImportWizardPage"; //$NON-NLS-1$

	/** The history dialog setting */
	protected static final String SETTING_HISTORY= "org.eclipse.jdt.ui.refactoring.jarHistory"; //$NON-NLS-1$

	/** Is the wizard page displayed for the first time? */
	private boolean fFirstTime= true;

	/** Is the wizard part of an import wizard? */
	private final boolean fImportWizard;

	/** The location control */
	private RefactoringLocationControl fLocationControl= null;

	/** The java model viewer */
	private TreeViewer fTreeViewer= null;

	/** The import wizard */
	private final JarImportWizard fWizard;

	/**
	* Creates a new jar import wizard page.
	*
	* @param wizard
	* the jar import wizard
	* @param importWizard
	* <code>true</code> if the wizard is part of an import wizard,
	* <code>false</code> otherwise
	*/
	public JarImportWizardPage(final JarImportWizard wizard, final boolean importWizard) {
	super(PAGE_NAME);
	Assert.isNotNull(wizard);
	fWizard= wizard;
	fImportWizard= importWizard;
	if (fImportWizard) {
	setTitle(JarImportMessages.JarImportWizardPage_page_title);
	setDescription(JarImportMessages.JarImportWizardPage_page_description);
	} else {
	setTitle(JarImportMessages.JarImportWizardPage_page_replace_title);
	setDescription(JarImportMessages.JarImportWizardPage_page_replace_description);
	}
	}

	/**
	* {@inheritDoc}
	*/
	public void createControl(final Composite parent) {
	initializeDialogUnits(parent);
	final Composite composite= new Composite(parent, SWT.NONE);
	composite.setLayout(new GridLayout());
	composite.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_FILL \| GridData.HORIZONTAL_ALIGN_FILL));
	createLocationGroup(composite);
	if (fImportWizard)
	createInputGroup(composite);
	createRenameGroup(composite);
	setPageComplete(false);
	if (fImportWizard && !fTreeViewer.getControl().isEnabled())
	setErrorMessage(JarImportMessages.JarImportWizardPage_no_jar_files);
	setControl(composite);
	Dialog.applyDialogFont(composite);
	PlatformUI.getWorkbench().getHelpSystem().setHelp(composite, IJavaHelpContextIds.JARIMPORT_WIZARD_PAGE);
	}

	/**
	* Creates a new grid data.
	*
	* @param flag
	* the flags to use
	* @param hspan
	* the horizontal span
	* @param indent
	* the indent
	* @return the grid data
	*/
	protected GridData createGridData(final int flag, final int hspan, final int indent) {
	final GridData data= new GridData(flag);
	data.horizontalIndent= indent;
	data.horizontalSpan= hspan;
	return data;
	}

	/**
	* Creates the input group.
	*
	* @param parent
	* the parent control
	*/
	protected void createInputGroup(final Composite parent) {
	Assert.isNotNull(parent);
	new Label(parent, SWT.NONE);
	final Label label= new Label(parent, SWT.NONE);
	label.setText(JarImportMessages.JarImportWizardPage_import_message);
	final StandardJavaElementContentProvider contentProvider= new StandardJavaElementContentProvider() {

	public Object[] getChildren(Object element) {
	if ((element instanceof IJavaProject) \|\| (element instanceof IJavaModel))
	return super.getChildren(element);
	return new Object[0];
	}

	protected Object[] getJavaProjects(final IJavaModel model) throws JavaModelException {
	final Set set= new HashSet();
	final IJavaProject[] projects= model.getJavaProjects();
	for (int index= 0; index < projects.length; index++) {
	if (JarImportWizard.isValidJavaProject(projects[index])) {
	final Object[] roots= getPackageFragmentRoots(projects[index]);
	if (roots.length > 0)
	set.add(projects[index]);
	}
	}
	return set.toArray();
	}

	protected Object[] getPackageFragmentRoots(final IJavaProject project) throws JavaModelException {
	final Set set= new HashSet();
	final IPackageFragmentRoot[] roots= project.getPackageFragmentRoots();
	for (int offset= 0; offset < roots.length; offset++) {
	if (JarImportWizard.isValidClassPathEntry(roots[offset].getRawClasspathEntry()))
	set.add(roots[offset]);
	}
	return set.toArray();
	}

	public boolean hasChildren(final Object element) {
	return (element instanceof IJavaProject) \|\| (element instanceof IJavaModel);
	}
	};

	final DecoratingLabelProvider labelProvider= new DecoratingLabelProvider(new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_BASICS \| JavaElementLabelProvider.SHOW_OVERLAY_ICONS \| JavaElementLabelProvider.SHOW_SMALL_ICONS), new ProblemsLabelDecorator());
	fTreeViewer= new TreeViewer(parent, SWT.SINGLE \| SWT.BORDER);
	fTreeViewer.getTree().setLayoutData(createGridData(GridData.FILL_BOTH, 6, 0));
	fTreeViewer.setLabelProvider(labelProvider);
	fTreeViewer.setContentProvider(contentProvider);
	fTreeViewer.addFilter(new EmptyPackageFilter());
	fTreeViewer.setSorter(new JavaElementSorter());
	fTreeViewer.setAutoExpandLevel(2);
	fTreeViewer.setInput(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()));
	final IPackageFragmentRoot root= fWizard.getPackageFragmentRoot();
	if (root != null) {
	fTreeViewer.setSelection(new StructuredSelection(new Object[] { root}), true);
	fTreeViewer.expandToLevel(root, 1);
	}
	fTreeViewer.addSelectionChangedListener(new ISelectionChangedListener() {

	public void selectionChanged(final SelectionChangedEvent event) {
	handleInputChanged();
	}
	});
	if (contentProvider.getChildren(JavaCore.create(ResourcesPlugin.getWorkspace().getRoot())).length == 0) {
	fTreeViewer.getControl().setEnabled(false);
	label.setEnabled(false);
	}
	}

	/**
	* Creates the location group.
	*
	* @param parent
	* the parent control
	*/
	protected void createLocationGroup(final Composite parent) {
	Assert.isNotNull(parent);
	new Label(parent, SWT.NONE).setText(JarImportMessages.JarImportWizardPage_import_label);
	final Composite composite= new Composite(parent, SWT.NONE);
	composite.setLayoutData(createGridData(GridData.FILL_HORIZONTAL, 6, 0));
	composite.setLayout(new GridLayout(3, false));
	final Label label= new Label(composite, SWT.NONE);
	label.setText(JarImportMessages.JarImportWizardPage_location_label);
	label.setLayoutData(createGridData(GridData.HORIZONTAL_ALIGN_BEGINNING, 1, 0));
	fLocationControl= new RefactoringLocationControl(fWizard, composite, SETTING_HISTORY);
	fLocationControl.setLayoutData(createGridData(GridData.FILL_HORIZONTAL, 1, 0));
	fLocationControl.loadHistory();
	fLocationControl.getControl().addModifyListener(new ModifyListener() {

	public final void modifyText(final ModifyEvent event) {
	handleInputChanged();
	}
	});
	fLocationControl.getControl().addSelectionListener(new SelectionAdapter() {

	public final void widgetSelected(final SelectionEvent event) {
	handleInputChanged();
	}
	});
	fLocationControl.setFocus();
	final Button button= new Button(composite, SWT.PUSH);
	button.setText(JarImportMessages.JarImportWizardPage_browse_button_label);
	button.setLayoutData(createGridData(GridData.HORIZONTAL_ALIGN_FILL, 1, 0));
	SWTUtil.setButtonDimensionHint(button);
	button.addSelectionListener(new SelectionAdapter() {

	public final void widgetSelected(final SelectionEvent event) {
	handleBrowseButtonSelected();
	}
	});
	}

	/**
	* Creates the rename group.
	*
	* @param parent
	* the parent control
	*/
	protected void createRenameGroup(final Composite parent) {
	Assert.isNotNull(parent);
	final JarImportData data= fWizard.getImportData();
	final Button button= new Button(parent, SWT.CHECK);
	button.setText(JarImportMessages.JarImportWizardPage_replace_jar_file);
	button.setSelection(!data.isRenameJarFile());
	button.addSelectionListener(new SelectionAdapter() {

	public void widgetSelected(final SelectionEvent event) {
	data.setRenameJarFile(!button.getSelection());
	}
	});
	if (fImportWizard && !fTreeViewer.getControl().isEnabled())
	button.setEnabled(false);
	if (!fImportWizard) {
	final GridData gd= new GridData();
	gd.horizontalIndent= IDialogConstants.HORIZONTAL_MARGIN;
	button.setLayoutData(gd);
	}
	}

	/**
	* Handles the browse button selected event.
	*/
	protected void handleBrowseButtonSelected() {
	final FileDialog file= new FileDialog(getShell(), SWT.OPEN);
	file.setText(JarImportMessages.JarImportWizardPage_browse_caption);
	file.setFilterNames(new String[] { ".jar", ".*"}); //$NON-NLS-1$ //$NON-NLS-2$
	file.setFilterExtensions(new String[] { ".jar", ".*"}); //$NON-NLS-1$ //$NON-NLS-2$
	final String path= file.open();
	if (path != null) {
	fLocationControl.setText(path);
	handleInputChanged();
	}
	}

	/**
	* Handles the input changed event.
	*/
	protected void handleInputChanged() {
	final JarImportData data= fWizard.getImportData();
	data.setRefactoringHistory(null);
	data.setRefactoringFileLocation(null);
	setErrorMessage(null);
	setPageComplete(true);
	handleJarFileChanged();
	if (isPageComplete())
	handlePackageFragmentRootChanged();
	if (fImportWizard && !fTreeViewer.getControl().isEnabled())
	setErrorMessage(JarImportMessages.JarImportWizardPage_no_jar_files);
	getContainer().updateButtons();
	}

	/**
	* Handles the jar file changed event.
	*/
	protected void handleJarFileChanged() {
	if (fLocationControl != null) {
	final String path= fLocationControl.getText();
	if ("".equals(path)) { //$NON-NLS-1$
	if (!fFirstTime)
	setErrorMessage(JarImportMessages.JarImportWizardPage_empty_location);
	fFirstTime= false;
	setPageComplete(false);
	return;
	} else {
	final File file= new File(path);
	if (!file.exists()) {
	setErrorMessage(JarImportMessages.JarImportWizardPage_invalid_location);
	setPageComplete(false);
	return;
	}
	ZipFile zip= null;
	try {
	try {
	zip= new ZipFile(file, ZipFile.OPEN_READ);
	} catch (IOException exception) {
	setErrorMessage(JarImportMessages.JarImportWizardPage_invalid_location);
	setPageComplete(false);
	return;
	}
	final JarImportData data= fWizard.getImportData();
	data.setRefactoringFileLocation(URIUtil.toURI(path));
	ZipEntry entry= zip.getEntry(JarPackagerUtil.getRefactoringsEntry());
	if (entry == null) {
	setMessage(JarImportMessages.JarImportWizardPage_no_refactorings, INFORMATION);
	setPageComplete(true);
	return;
	}
	handleTimeStampChanged();
	if (data.getExistingTimeStamp() > entry.getTime()) {
	setMessage(JarImportMessages.JarImportWizardPage_version_warning, WARNING);
	setPageComplete(true);
	return;
	}
	InputStream stream= null;
	try {
	stream= zip.getInputStream(entry);
	data.setRefactoringHistory(RefactoringCore.getHistoryService().readRefactoringHistory(stream, JavaRefactoringDescriptor.JAR_IMPORTABLE \| JavaRefactoringDescriptor.JAR_REFACTORABLE));
	} catch (IOException exception) {
	setErrorMessage(JarImportMessages.JarImportWizardPage_no_refactorings);
	setPageComplete(false);
	return;
	} catch (CoreException exception) {
	JavaPlugin.log(exception);
	setErrorMessage(JarImportMessages.JarImportWizardPage_no_refactorings);
	setPageComplete(false);
	return;
	} finally {
	if (stream != null) {
	try {
	stream.close();
	} catch (IOException exception) {
	// Do nothing
	}
	}
	}
	} finally {
	if (zip != null) {
	try {
	zip.close();
	} catch (IOException e) {
	}
	}
	}
	}
	}
	}

	/**
	* Handles the package fragment root changed event.
	*/
	protected void handlePackageFragmentRootChanged() {
	if (fTreeViewer != null) {
	final IStructuredSelection selection= (IStructuredSelection) fTreeViewer.getSelection();
	final Object[] elements= selection.toArray();
	if (elements.length != 1) {
	setErrorMessage(JarImportMessages.JarImportWizardPage_select_single_jar);
	setPageComplete(false);
	return;
	} else {
	final JarImportData data= fWizard.getImportData();
	final Object element= elements[0];
	if (element instanceof IPackageFragmentRoot)
	data.setPackageFragmentRoot((IPackageFragmentRoot) element);
	else if (element instanceof IPackageFragment) {
	data.setPackageFragmentRoot((IPackageFragmentRoot) ((IJavaElement) element).getParent());
	} else {
	setErrorMessage(JarImportMessages.JarImportWizardPage_select_single_jar);
	setPageComplete(false);
	}
	}
	}
	}

	/**
	* Handles the time stamp changed event.
	*/
	protected void handleTimeStampChanged() {
	final IPackageFragmentRoot root= fWizard.getPackageFragmentRoot();
	if (root != null) {
	try {
	final URI uri= BinaryRefactoringHistoryWizard.getLocationURI(root.getRawClasspathEntry());
	if (uri != null) {
	final File file= new File(uri);
	if (file.exists()) {
	ZipFile zip= null;
	try {
	zip= new ZipFile(file, ZipFile.OPEN_READ);
	ZipEntry entry= zip.getEntry(JarPackagerUtil.getRefactoringsEntry());
	if (entry != null) {
	fWizard.getImportData().setExistingTimeStamp(entry.getTime());
	}
	} catch (IOException exception) {
	// Just leave it
	} finally {
	if (zip != null) {
	try {
	zip.close();
	} catch (IOException e) {
	}
	}
	}
	}
	}
	} catch (CoreException exception) {
	JavaPlugin.log(exception);
	}
	}
	}

	/**
	* Gets called if the wizard is finished.
	*/
	public void performFinish() {
	fLocationControl.saveHistory();
	}

	/**
	* {@inheritDoc}
	*/
	public void setVisible(final boolean visible) {
	super.setVisible(visible);
	if (visible)
	handleInputChanged();
	}
	}