2 * Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
3 * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
7 * Redistribution and use in source and binary forms, with or
8 * without modification, are permitted provided that the following
11 * - Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * - Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer in the documentation and/or other materials provided
17 * with the distribution.
19 * - Neither the name of the Git Development Community nor the
20 * names of its contributors may be used to endorse or promote
21 * products derived from this software without specific prior
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
25 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
26 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
32 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
33 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
34 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
36 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 package org
.spearce
.jgit
.lib
;
41 import java
.io
.IOException
;
43 import org
.spearce
.jgit
.errors
.CorruptObjectException
;
45 /** Reads a deltified object which uses an offset to find its base. */
46 class DeltaOfsPackedObjectLoader
extends DeltaPackedObjectLoader
{
47 private final long deltaBase
;
49 DeltaOfsPackedObjectLoader(final WindowCursor curs
, final PackFile pr
,
50 final long dataOffset
, final long objectOffset
, final int deltaSz
,
52 super(curs
, pr
, dataOffset
, objectOffset
, deltaSz
);
56 protected PackedObjectLoader
getBaseLoader() throws IOException
{
57 return pack
.resolveBase(curs
, deltaBase
);
61 public int getRawType() {
62 return Constants
.OBJ_OFS_DELTA
;
66 public ObjectId
getDeltaBase() throws IOException
{
67 final ObjectId id
= pack
.findObjectForOffset(deltaBase
);
69 throw new CorruptObjectException(
70 "Offset-written delta base for object not found in a pack");