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1 | /******************************************************************************* |
2 | * Copyright (c) 2000, 2016 IBM Corporation and others. | |
3 | * All rights reserved. This program and the accompanying materials | |
4 | * are made available under the terms of the Eclipse Public License v1.0 | |
5 | * which accompanies this distribution, and is available at | |
6 | * http://www.eclipse.org/legal/epl-v10.html | |
7 | * | |
8 | * Contributors: | |
9 | * IBM Corporation - initial API and implementation | |
10 | * Red Hat, Inc - Was TarFileStructureProvider, performed changes from | |
11 | * IImportStructureProvider to ILeveledImportStructureProvider | |
12 | * Mickael Istria (Red Hat Inc.) - Bug 486901 | |
13 | * Marc-Andre Laperle <marc-andre.laperle@ericsson.com> - Copied to Trace Compass to work around bug 501379 | |
14 | *******************************************************************************/ | |
15 | package org.eclipse.tracecompass.internal.tmf.ui.project.wizards.importtrace; | |
16 | ||
17 | import java.io.IOException; | |
18 | import java.io.InputStream; | |
19 | import java.util.ArrayList; | |
20 | import java.util.Enumeration; | |
21 | import java.util.HashMap; | |
22 | import java.util.List; | |
23 | import java.util.Map; | |
24 | ||
25 | import org.eclipse.core.resources.ResourceAttributes; | |
26 | import org.eclipse.core.runtime.IPath; | |
27 | import org.eclipse.core.runtime.Path; | |
28 | import org.eclipse.tracecompass.common.core.NonNullUtils; | |
29 | import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin; | |
30 | import org.eclipse.ui.internal.wizards.datatransfer.DataTransferMessages; | |
31 | import org.eclipse.ui.internal.wizards.datatransfer.ILeveledImportStructureProvider; | |
32 | ||
33 | /** | |
34 | * This class provides information regarding the context structure and content | |
35 | * of specified tar file entry objects. | |
36 | */ | |
37 | @SuppressWarnings("restriction") | |
38 | public class TarLeveledStructureProvider implements | |
39 | ILeveledImportStructureProvider { | |
40 | private TarFile tarFile; | |
41 | ||
42 | private TarEntry root = new TarEntry("/");//$NON-NLS-1$ | |
43 | ||
44 | private Map<TarEntry, List<TarEntry>> children; | |
45 | ||
46 | private Map<IPath, TarEntry> directoryEntryCache = new HashMap<>(); | |
47 | ||
48 | private int stripLevel; | |
49 | ||
50 | /** | |
51 | * Creates a <code>TarFileStructureProvider</code>, which will operate on | |
52 | * the passed tar file. | |
53 | * | |
54 | * @param sourceFile | |
55 | * the source TarFile | |
56 | */ | |
57 | public TarLeveledStructureProvider(TarFile sourceFile) { | |
58 | super(); | |
59 | tarFile = sourceFile; | |
60 | root.setFileType(TarEntry.DIRECTORY); | |
61 | } | |
62 | ||
63 | /** | |
64 | * Creates a new container tar entry with the specified name, iff it has | |
65 | * not already been created. If the parent of the given element does not | |
66 | * already exist it will be recursively created as well. | |
67 | * @param pathname The path representing the container | |
68 | * @return The element represented by this pathname (it may have already existed) | |
69 | */ | |
70 | protected TarEntry createContainer(IPath pathname) { | |
71 | TarEntry existingEntry = directoryEntryCache.get(pathname); | |
72 | if (existingEntry != null) { | |
73 | return existingEntry; | |
74 | } | |
75 | ||
76 | TarEntry parent; | |
77 | if (pathname.segmentCount() == 1) { | |
78 | parent = root; | |
79 | } else { | |
80 | parent = createContainer(pathname.removeLastSegments(1)); | |
81 | } | |
82 | TarEntry newEntry = new TarEntry(pathname.toString()); | |
83 | newEntry.setFileType(TarEntry.DIRECTORY); | |
84 | directoryEntryCache.put(pathname, newEntry); | |
85 | List<TarEntry> childList = new ArrayList<>(); | |
86 | children.put(newEntry, childList); | |
87 | ||
88 | List<TarEntry> parentChildList = children.get(parent); | |
89 | NonNullUtils.checkNotNull(parentChildList).add(newEntry); | |
90 | return newEntry; | |
91 | } | |
92 | ||
93 | /** | |
94 | * Creates a new tar file entry with the specified name. | |
95 | * @param entry the entry to create the file for | |
96 | */ | |
97 | protected void createFile(TarEntry entry) { | |
98 | IPath pathname = new Path(entry.getName()); | |
99 | TarEntry parent; | |
100 | if (pathname.segmentCount() == 1) { | |
101 | parent = root; | |
102 | } else { | |
103 | parent = directoryEntryCache.get(pathname | |
104 | .removeLastSegments(1)); | |
105 | } | |
106 | ||
107 | List<TarEntry> childList = children.get(parent); | |
108 | NonNullUtils.checkNotNull(childList).add(entry); | |
109 | } | |
110 | ||
111 | @Override | |
112 | public List getChildren(Object element) { | |
113 | if (children == null) { | |
114 | initialize(); | |
115 | } | |
116 | ||
117 | return (children.get(element)); | |
118 | } | |
119 | ||
120 | @Override | |
121 | public InputStream getContents(Object element) { | |
122 | try { | |
123 | return tarFile.getInputStream((TarEntry) element); | |
124 | } catch (TarException e) { | |
125 | IDEWorkbenchPlugin.log(e.getLocalizedMessage(), e); | |
126 | return null; | |
127 | } catch (IOException e) { | |
128 | IDEWorkbenchPlugin.log(e.getLocalizedMessage(), e); | |
129 | return null; | |
130 | } | |
131 | } | |
132 | ||
133 | /** | |
134 | * Returns the resource attributes for this file. | |
135 | * | |
136 | * @param element the element to get the attributes from | |
137 | * @return the attributes of the file | |
138 | */ | |
139 | public ResourceAttributes getResourceAttributes(Object element) { | |
140 | ResourceAttributes attributes = new ResourceAttributes(); | |
141 | TarEntry entry = (TarEntry) element; | |
142 | attributes.setExecutable((entry.getMode() & 0100) != 0); | |
143 | attributes.setReadOnly((entry.getMode() & 0200) == 0); | |
144 | return attributes; | |
145 | } | |
146 | ||
147 | @Override | |
148 | public String getFullPath(Object element) { | |
149 | return stripPath(((TarEntry) element).getName()); | |
150 | } | |
151 | ||
152 | @Override | |
153 | public String getLabel(Object element) { | |
154 | if (element.equals(root)) { | |
155 | return ((TarEntry) element).getName(); | |
156 | } | |
157 | ||
158 | return stripPath(new Path(((TarEntry) element).getName()).lastSegment()); | |
159 | } | |
160 | ||
161 | /** | |
162 | * Returns the entry that this importer uses as the root sentinel. | |
163 | * | |
164 | * @return TarEntry entry | |
165 | */ | |
166 | @Override | |
167 | public Object getRoot() { | |
168 | return root; | |
169 | } | |
170 | ||
171 | /** | |
172 | * Returns the tar file that this provider provides structure for. | |
173 | * | |
174 | * @return TarFile file | |
175 | */ | |
176 | public TarFile getTarFile() { | |
177 | return tarFile; | |
178 | } | |
179 | ||
180 | @Override | |
181 | public boolean closeArchive(){ | |
182 | try { | |
183 | getTarFile().close(); | |
184 | } catch (IOException e) { | |
185 | IDEWorkbenchPlugin.log(DataTransferMessages.ZipImport_couldNotClose | |
186 | + getTarFile().getName(), e); | |
187 | return false; | |
188 | } | |
189 | return true; | |
190 | } | |
191 | ||
192 | /** | |
193 | * Initializes this object's children table based on the contents of the | |
194 | * specified source file. | |
195 | */ | |
196 | protected void initialize() { | |
197 | children = new HashMap<>(1000); | |
198 | ||
199 | children.put(root, new ArrayList<>()); | |
200 | Enumeration<TarEntry> entries = tarFile.entries(); | |
201 | while (entries.hasMoreElements()) { | |
202 | TarEntry entry = entries.nextElement(); | |
203 | IPath path = new Path(entry.getName()).addTrailingSeparator(); | |
204 | ||
205 | if (entry.getFileType() == TarEntry.DIRECTORY) { | |
206 | createContainer(path); | |
207 | } else | |
208 | { | |
209 | // Ensure the container structure for all levels above this is initialized | |
210 | // Once we hit a higher-level container that's already added we need go no further | |
211 | int pathSegmentCount = path.segmentCount(); | |
212 | if (pathSegmentCount > 1) { | |
213 | createContainer(path.uptoSegment(pathSegmentCount - 1)); | |
214 | } | |
215 | createFile(entry); | |
216 | } | |
217 | } | |
218 | } | |
219 | ||
220 | @Override | |
221 | public boolean isFolder(Object element) { | |
222 | return (((TarEntry) element).getFileType() == TarEntry.DIRECTORY); | |
223 | } | |
224 | ||
225 | /* | |
226 | * Strip the leading directories from the path | |
227 | */ | |
228 | private String stripPath(String path) { | |
229 | String strippedPath = path; | |
230 | String pathOrig = strippedPath; | |
231 | for (int i = 0; i < stripLevel; i++) { | |
232 | int firstSep = strippedPath.indexOf('/'); | |
233 | // If the first character was a seperator we must strip to the next | |
234 | // seperator as well | |
235 | if (firstSep == 0) { | |
236 | strippedPath = strippedPath.substring(1); | |
237 | firstSep = strippedPath.indexOf('/'); | |
238 | } | |
239 | // No seperator wasw present so we're in a higher directory right | |
240 | // now | |
241 | if (firstSep == -1) { | |
242 | return pathOrig; | |
243 | } | |
244 | strippedPath = strippedPath.substring(firstSep); | |
245 | } | |
246 | return strippedPath; | |
247 | } | |
248 | ||
249 | @Override | |
250 | public void setStrip(int level) { | |
251 | stripLevel = level; | |
252 | } | |
253 | ||
254 | @Override | |
255 | public int getStrip() { | |
256 | return stripLevel; | |
257 | } | |
258 | } |