org.spearce.egit.core/src/org/spearce/egit/core/internal/storage/GitFileRevision.java

   1 /*******************************************************************************
   2  * Copyright (C) 2006, Robin Rosenberg <robin.rosenberg@dewire.com>
   3  * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
   4  *
   5  * All rights reserved. This program and the accompanying materials
   6  * are made available under the terms of the Eclipse Public License v1.0
   7  * See LICENSE for the full license text, also available.
   8  *******************************************************************************/
   9 package org.spearce.egit.core.internal.storage;
  10
  11 import java.net.URI;
  12 import java.net.URISyntaxException;
  13
  14 import org.eclipse.core.runtime.CoreException;
  15 import org.eclipse.core.runtime.IProgressMonitor;
  16 import org.eclipse.team.core.history.IFileRevision;
  17 import org.eclipse.team.core.history.provider.FileRevision;
  18 import org.spearce.jgit.lib.ObjectId;
  19 import org.spearce.jgit.lib.Repository;
  20 import org.spearce.jgit.revwalk.RevCommit;
  21
  22 /**
  23  * A Git related {@link IFileRevision}. It references a version and a resource,
  24  * i.e. the version we think corresponds to the resource in specific version.
  25  */
  26 public abstract class GitFileRevision extends FileRevision {
  27         /** Content identifier for the working copy. */
  28         public static final String WORKSPACE = "Workspace";
  29
  30         /** Content identifier for the content staged in the index. */
  31         public static final String INDEX = "Index";
  32
  33         /**
  34          * Obtain a file revision for a specific blob of an existing commit.
  35          *
  36          * @param db
  37          *            the repository this commit was loaded out of, and that this
  38          *            file's blob should also be reachable through.
  39          * @param commit
  40          *            the commit the blob was identified to be within.
  41          * @param path
  42          *            path within the commit's tree of the file.
  43          * @param blobId
  44          *            unique name of the content.
  45          * @return revision implementation for this file in the given commit.
  46          */
  47         public static GitFileRevision inCommit(final Repository db,
  48                         final RevCommit commit, final String path, final ObjectId blobId) {
  49                 return new CommitFileRevision(db, commit, path, blobId);
  50         }
  51
  52         /**
  53          * @param db
  54          *            the repository which contains the index to use.
  55          * @param path
  56          *            path of the resource in the index
  57          * @return revision implementation for the given path in the index
  58          */
  59         public static GitFileRevision inIndex(final Repository db, final String path) {
  60                 return new IndexFileRevision(db, path);
  61         }
  62
  63         private final String path;
  64
  65         GitFileRevision(final String fileName) {
  66                 path = fileName;
  67         }
  68
  69         public String getName() {
  70                 final int last = path.lastIndexOf('/');
  71                 return last >= 0 ? path.substring(last + 1) : path;
  72         }
  73
  74         public boolean isPropertyMissing() {
  75                 return false;
  76         }
  77
  78         public IFileRevision withAllProperties(final IProgressMonitor monitor)
  79                         throws CoreException {
  80                 return this;
  81         }
  82
  83         public URI getURI() {
  84                 try {
  85                         return new URI(null, null, path, null);
  86                 } catch (URISyntaxException e) {
  87                         return null;
  88                 }
  89         }
  90 }