org.eclipse.egit.core/src/org/eclipse/egit/core/internal/storage/IndexFileRevision.java

   1 /*******************************************************************************
   2  * Copyright (C) 2007, Robin Rosenberg <me@lathund.dewire.com>
   3  * Copyright (C) 2006, Robin Rosenberg <robin.rosenberg@dewire.com>
   4  * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
   5  *
   6  * All rights reserved. This program and the accompanying materials
   7  * are made available under the terms of the Eclipse Public License v1.0
   8  * which accompanies this distribution, and is available at
   9  * http://www.eclipse.org/legal/epl-v10.html
  10  *******************************************************************************/
  11 package org.eclipse.egit.core.internal.storage;
  12
  13 import java.io.IOException;
  14
  15 import org.eclipse.core.internal.resources.ResourceException;
  16 import org.eclipse.core.resources.IResourceStatus;
  17 import org.eclipse.core.resources.IStorage;
  18 import org.eclipse.core.runtime.CoreException;
  19 import org.eclipse.core.runtime.IProgressMonitor;
  20 import org.eclipse.core.runtime.Path;
  21 import org.eclipse.team.core.history.IFileRevision;
  22 import org.spearce.jgit.lib.GitIndex;
  23 import org.spearce.jgit.lib.ObjectId;
  24 import org.spearce.jgit.lib.Repository;
  25 import org.spearce.jgit.lib.GitIndex.Entry;
  26
  27 /** An {@link IFileRevision} for the version in the Git index. */
  28 class IndexFileRevision extends GitFileRevision implements IFileRevision {
  29         private final Repository db;
  30
  31         private final String path;
  32
  33         private ObjectId blobId;
  34
  35         IndexFileRevision(final Repository repo, final String fileName) {
  36                 super(fileName);
  37                 db = repo;
  38                 path = fileName;
  39         }
  40
  41         public IStorage getStorage(IProgressMonitor monitor) throws CoreException {
  42                 if (blobId == null)
  43                         blobId = locateBlobObjectId();
  44                 return new BlobStorage(db, path, blobId);
  45         }
  46
  47         public boolean isPropertyMissing() {
  48                 return false;
  49         }
  50
  51         public IFileRevision withAllProperties(IProgressMonitor monitor)
  52                         throws CoreException {
  53                 return null;
  54         }
  55
  56         public String getAuthor() {
  57                 return "";
  58         }
  59
  60         public long getTimestamp() {
  61                 return -1;
  62         }
  63
  64         public String getComment() {
  65                 return null;
  66         }
  67
  68         public String getContentIdentifier() {
  69                 return INDEX;
  70         }
  71
  72         private ObjectId locateBlobObjectId() throws CoreException {
  73                 try {
  74                         final GitIndex idx = db.getIndex();
  75                         final Entry e = idx.getEntry(path);
  76                         if (e == null)
  77                                 throw new ResourceException(IResourceStatus.FAILED_READ_LOCAL,
  78                                                 Path.fromPortableString(path),
  79                                                 "Git index entry not found", null);
  80                         return e.getObjectId();
  81
  82                 } catch (IOException e) {
  83                         throw new ResourceException(IResourceStatus.FAILED_READ_LOCAL, Path
  84                                         .fromPortableString(path),
  85                                         "IO error looking up path in index.", e);
  86                 }
  87         }
  88 }