2
This code is derived from jgit (http://eclipse.org/jgit).
3
Copyright owners are documented in jgit's IP log.
5
This program and the accompanying materials are made available
6
under the terms of the Eclipse Distribution License v1.0 which
7
accompanies this distribution, is reproduced below, and is
8
available at http://www.eclipse.org/org/documents/edl-v10.php
12
Redistribution and use in source and binary forms, with or
13
without modification, are permitted provided that the following
16
- Redistributions of source code must retain the above copyright
17
notice, this list of conditions and the following disclaimer.
19
- Redistributions in binary form must reproduce the above
20
copyright notice, this list of conditions and the following
21
disclaimer in the documentation and/or other materials provided
22
with the distribution.
24
- Neither the name of the Eclipse Foundation, Inc. nor the
25
names of its contributors may be used to endorse or promote
26
products derived from this software without specific prior
29
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
49
/// <summary>Queue to open objects asynchronously.</summary>
51
/// Queue to open objects asynchronously.
52
/// A queue may perform background decompression of objects and supply them
53
/// (possibly out-of-order) to the application.
56
public interface AsyncObjectLoaderQueue<T> : AsyncOperation where T:ObjectId
58
/// <summary>Position this queue onto the next available result.</summary>
60
/// Position this queue onto the next available result.
61
/// Even if this method returns true,
62
/// <see cref="AsyncObjectLoaderQueue{T}.Open()">AsyncObjectLoaderQueue<T>.Open()
65
/// <see cref="NGit.Errors.MissingObjectException">NGit.Errors.MissingObjectException
67
/// if the underlying object database was
68
/// concurrently modified and the current object is no longer available.
71
/// true if there is a result available; false if the queue has
72
/// finished its input iteration.
74
/// <exception cref="NGit.Errors.MissingObjectException">
75
/// the object does not exist. If the implementation is retaining
76
/// the application's objects
77
/// <see cref="AsyncObjectLoaderQueue{T}.GetCurrent()">AsyncObjectLoaderQueue<T>.GetCurrent()
80
/// current object that is missing. There may be more results
81
/// still available, so the caller should continue invoking next
82
/// to examine another result.
84
/// <exception cref="System.IO.IOException">the object store cannot be accessed.</exception>
88
/// the current object, null if the implementation lost track.
89
/// Implementations may for performance reasons discard the caller's
90
/// ObjectId and provider their own through
91
/// <see cref="AsyncObjectLoaderQueue{T}.GetObjectId()">AsyncObjectLoaderQueue<T>.GetObjectId()
97
/// <returns>the ObjectId of the current object. Never null.</returns>
98
ObjectId GetObjectId();
100
/// <summary>Obtain a loader to read the object.</summary>
102
/// Obtain a loader to read the object.
103
/// This method can only be invoked once per result
104
/// Due to race conditions with a concurrent modification of the underlying
105
/// object database, an object may be unavailable when this method is
106
/// invoked, even though next returned successfully.
108
/// <returns>the ObjectLoader to read this object. Never null.</returns>
109
/// <exception cref="NGit.Errors.MissingObjectException">
110
/// the object does not exist. If the implementation is retaining
111
/// the application's objects
112
/// <see cref="AsyncObjectLoaderQueue{T}.GetCurrent()">AsyncObjectLoaderQueue<T>.GetCurrent()
115
/// current object that is missing. There may be more results
116
/// still available, so the caller should continue invoking next
117
/// to examine another result.
119
/// <exception cref="System.IO.IOException">the object store cannot be accessed.</exception>