| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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 - Was TarFileStructureProvider, performed changes from |
| * IImportStructureProvider to ILeveledImportStructureProvider |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.wizards.datatransfer; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.core.resources.ResourceAttributes; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.core.runtime.Path; |
| |
| /** |
| * This class provides information regarding the context structure and content |
| * of specified tar file entry objects. |
| * |
| * @since 3.1 |
| */ |
| public class TarLeveledStructureProvider implements |
| ILeveledImportStructureProvider { |
| private TarFile tarFile; |
| |
| private TarEntry root = new TarEntry("/");//$NON-NLS-1$ |
| |
| private Map children; |
| |
| private Map directoryEntryCache = new HashMap(); |
| |
| private int stripLevel; |
| |
| /** |
| * Creates a <code>TarFileStructureProvider</code>, which will operate on |
| * the passed tar file. |
| * |
| * @param sourceFile |
| * the source TarFile |
| */ |
| public TarLeveledStructureProvider(TarFile sourceFile) { |
| super(); |
| tarFile = sourceFile; |
| root.setFileType(TarEntry.DIRECTORY); |
| } |
| |
| /** |
| * Creates a new container tar entry with the specified name, iff it has |
| * not already been created. If the parent of the given element does not |
| * already exist it will be recursively created as well. |
| * @param pathname The path representing the container |
| * @return The element represented by this pathname (it may have already existed) |
| */ |
| protected TarEntry createContainer(IPath pathname) { |
| TarEntry existingEntry = (TarEntry) directoryEntryCache.get(pathname); |
| if (existingEntry != null) |
| return existingEntry; |
| |
| TarEntry parent; |
| if (pathname.segmentCount() == 1) |
| parent = root; |
| else |
| parent = createContainer(pathname.removeLastSegments(1)); |
| TarEntry newEntry = new TarEntry(pathname.toString()); |
| newEntry.setFileType(TarEntry.DIRECTORY); |
| directoryEntryCache.put(pathname, newEntry); |
| List childList = new ArrayList(); |
| children.put(newEntry, childList); |
| |
| List parentChildList = (List) children.get(parent); |
| parentChildList.add(newEntry); |
| return newEntry; |
| } |
| |
| /** |
| * Creates a new tar file entry with the specified name. |
| */ |
| protected void createFile(TarEntry entry) { |
| IPath pathname = new Path(entry.getName()); |
| TarEntry parent; |
| if (pathname.segmentCount() == 1) |
| parent = root; |
| else |
| parent = (TarEntry) directoryEntryCache.get(pathname |
| .removeLastSegments(1)); |
| |
| List childList = (List) children.get(parent); |
| childList.add(entry); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on IImportStructureProvider |
| */ |
| public List getChildren(Object element) { |
| if (children == null) |
| initialize(); |
| |
| return ((List) children.get(element)); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on IImportStructureProvider |
| */ |
| public InputStream getContents(Object element) { |
| try { |
| return tarFile.getInputStream((TarEntry) element); |
| } catch (TarException e) { |
| return null; |
| } catch (IOException e) { |
| return null; |
| } |
| } |
| |
| /** |
| * Returns the resource attributes for this file. |
| * |
| * @param element |
| * @return the attributes of the file |
| */ |
| public ResourceAttributes getResourceAttributes(Object element) { |
| ResourceAttributes attributes = new ResourceAttributes(); |
| TarEntry entry = (TarEntry) element; |
| attributes.setExecutable((entry.getMode() & 0100) != 0); |
| attributes.setReadOnly((entry.getMode() & 0200) == 0); |
| return attributes; |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on IImportStructureProvider |
| */ |
| public String getFullPath(Object element) { |
| return stripPath(((TarEntry) element).getName()); |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on IImportStructureProvider |
| */ |
| public String getLabel(Object element) { |
| if (element.equals(root)) |
| return ((TarEntry) element).getName(); |
| |
| return stripPath(new Path(((TarEntry) element).getName()).lastSegment()); |
| } |
| |
| /** |
| * Returns the entry that this importer uses as the root sentinel. |
| * |
| * @return TarEntry entry |
| */ |
| public Object getRoot() { |
| return root; |
| } |
| |
| /** |
| * Returns the tar file that this provider provides structure for. |
| * |
| * @return TarFile file |
| */ |
| public TarFile getTarFile() { |
| return tarFile; |
| } |
| |
| /** |
| * Initializes this object's children table based on the contents of the |
| * specified source file. |
| */ |
| protected void initialize() { |
| children = new HashMap(1000); |
| |
| children.put(root, new ArrayList()); |
| Enumeration entries = tarFile.entries(); |
| while (entries.hasMoreElements()) { |
| TarEntry entry = (TarEntry) entries.nextElement(); |
| IPath path = new Path(entry.getName()).addTrailingSeparator(); |
| |
| if (entry.getFileType() == TarEntry.DIRECTORY) |
| createContainer(path); |
| else |
| { |
| // Ensure the container structure for all levels above this is initialized |
| // Once we hit a higher-level container that's already added we need go no further |
| int pathSegmentCount = path.segmentCount(); |
| if (pathSegmentCount > 1) |
| createContainer(path.uptoSegment(pathSegmentCount - 1)); |
| createFile(entry); |
| } |
| } |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on IImportStructureProvider |
| */ |
| public boolean isFolder(Object element) { |
| return (((TarEntry) element).getFileType() == TarEntry.DIRECTORY); |
| } |
| |
| /* |
| * Strip the leading directories from the path |
| */ |
| private String stripPath(String path) { |
| String pathOrig = new String(path); |
| for (int i = 0; i < stripLevel; i++) { |
| int firstSep = path.indexOf('/'); |
| // If the first character was a seperator we must strip to the next |
| // seperator as well |
| if (firstSep == 0) { |
| path = path.substring(1); |
| firstSep = path.indexOf('/'); |
| } |
| // No seperator wasw present so we're in a higher directory right |
| // now |
| if (firstSep == -1) |
| return pathOrig; |
| path = path.substring(firstSep); |
| } |
| return path; |
| } |
| |
| public void setStrip(int level) { |
| stripLevel = level; |
| } |
| |
| public int getStrip() { |
| return stripLevel; |
| } |
| } |