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This code is derived from jgit (http://eclipse.org/jgit).
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Copyright owners are documented in jgit's IP log.
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This program and the accompanying materials are made available
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under the terms of the Eclipse Distribution License v1.0 which
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accompanies this distribution, is reproduced below, and is
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available at http://www.eclipse.org/org/documents/edl-v10.php
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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- Neither the name of the Eclipse Foundation, Inc. nor the
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names of its contributors may be used to endorse or promote
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products derived from this software without specific prior
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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namespace NGit.Revwalk
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/// <summary>Produces commits for RevWalk to return to applications.</summary>
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/// Produces commits for RevWalk to return to applications.
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/// Implementations of this basic class provide the real work behind RevWalk.
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/// Conceptually a Generator is an iterator or a queue, it returns commits until
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/// there are no more relevant. Generators may be piped/stacked together to
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/// create a more complex set of operations.
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/// <seealso cref="PendingGenerator">PendingGenerator</seealso>
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/// <seealso cref="StartGenerator">StartGenerator</seealso>
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public abstract class Generator
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/// <summary>Commits are sorted by commit date and time, descending.</summary>
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/// <remarks>Commits are sorted by commit date and time, descending.</remarks>
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internal const int SORT_COMMIT_TIME_DESC = 1 << 0;
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/// <see cref="RevWalk.REWRITE">RevWalk.REWRITE</see>
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internal const int HAS_REWRITE = 1 << 1;
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/// <see cref="RewriteGenerator">RewriteGenerator</see>
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internal const int NEEDS_REWRITE = 1 << 2;
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/// <summary>Topological ordering is enforced (all children before parents).</summary>
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/// <remarks>Topological ordering is enforced (all children before parents).</remarks>
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internal const int SORT_TOPO = 1 << 3;
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/// <see cref="RevWalk.UNINTERESTING">RevWalk.UNINTERESTING</see>
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internal const int HAS_UNINTERESTING = 1 << 4;
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/// <summary>Connect the supplied queue to this generator's own free list (if any).</summary>
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/// <remarks>Connect the supplied queue to this generator's own free list (if any).</remarks>
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/// <param name="q">another FIFO queue that wants to share our queue's free list.</param>
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internal virtual void ShareFreeList(BlockRevQueue q)
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// Do nothing by default.
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/// <summary>Obtain flags describing the output behavior of this generator.</summary>
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/// <remarks>Obtain flags describing the output behavior of this generator.</remarks>
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/// one or more of the constants declared in this class, describing
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/// how this generator produces its results.
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internal abstract int OutputType();
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/// <summary>Return the next commit to the application, or the next generator.</summary>
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/// <remarks>Return the next commit to the application, or the next generator.</remarks>
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/// <returns>next available commit; null if no more are to be returned.</returns>
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/// <exception cref="NGit.Errors.MissingObjectException">NGit.Errors.MissingObjectException
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/// <exception cref="NGit.Errors.IncorrectObjectTypeException">NGit.Errors.IncorrectObjectTypeException
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/// <exception cref="System.IO.IOException">System.IO.IOException</exception>
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internal abstract RevCommit Next();