/*
* Copyright (C) 2010, Christian Halstrick <christian.halstrick@sap.com>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.api;
import java.io.IOException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jgit.JGitText;
import org.eclipse.jgit.api.errors.JGitInternalException;
import org.eclipse.jgit.api.errors.NoHeadException;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.lib.AnyObjectId;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.revwalk.filter.AndRevFilter;
import org.eclipse.jgit.revwalk.filter.MaxCountRevFilter;
import org.eclipse.jgit.revwalk.filter.SkipRevFilter;
import org.eclipse.jgit.treewalk.filter.AndTreeFilter;
import org.eclipse.jgit.treewalk.filter.PathFilter;
import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
import org.eclipse.jgit.treewalk.filter.TreeFilter;
/**
* A class used to execute a {@code Log} command. It has setters for all
* supported options and arguments of this command and a {@link #call()} method
* to finally execute the command. Each instance of this class should only be
* used for one invocation of the command (means: one call to {@link #call()})
* <p>
* This is currently a very basic implementation which takes only one starting
* revision as option.
*
* TODO: add more options (revision ranges, sorting, ...)
*
* @see <a href="http://www.kernel.org/pub/software/scm/git/docs/git-log.html"
* >Git documentation about Log</a>
*/
public class LogCommand extends GitCommand<Iterable<RevCommit>> {
private RevWalk walk;
private boolean startSpecified = false;
private final List<PathFilter> pathFilters = new ArrayList<PathFilter>();
private int maxCount = -1;
private int skip = -1;
/**
* @param repo
*/
protected LogCommand(Repository repo) {
super(repo);
walk = new RevWalk(repo);
}
/**
* Executes the {@code Log} command with all the options and parameters
* collected by the setter methods (e.g. {@link #add(AnyObjectId)},
* {@link #not(AnyObjectId)}, ..) of this class. Each instance of this class
* should only be used for one invocation of the command. Don't call this
* method twice on an instance.
*
* @return an iteration over RevCommits
*/
public Iterable<RevCommit> call() throws NoHeadException,
JGitInternalException {
checkCallable();
if (pathFilters.size() > 0)
walk.setTreeFilter(AndTreeFilter.create(
PathFilterGroup.create(pathFilters), TreeFilter.ANY_DIFF));
if (skip > -1 && maxCount > -1)
walk.setRevFilter(AndRevFilter.create(SkipRevFilter.create(skip),
MaxCountRevFilter.create(maxCount)));
else if (skip > -1)
walk.setRevFilter(SkipRevFilter.create(skip));
else if (maxCount > -1)
walk.setRevFilter(MaxCountRevFilter.create(maxCount));
if (!startSpecified) {
try {
ObjectId headId = repo.resolve(Constants.HEAD);
if (headId == null)
throw new NoHeadException(
JGitText.get().noHEADExistsAndNoExplicitStartingRevisionWasSpecified);
add(headId);
} catch (IOException e) {
// all exceptions thrown by add() shouldn't occur and represent
// severe low-level exception which are therefore wrapped
throw new JGitInternalException(
JGitText.get().anExceptionOccurredWhileTryingToAddTheIdOfHEAD,
e);
}
}
setCallable(false);
return walk;
}
/**
* Mark a commit to start graph traversal from.
*
* @see RevWalk#markStart(RevCommit)
* @param start
* @return {@code this}
* @throws MissingObjectException
* the commit supplied is not available from the object
* database. This usually indicates the supplied commit is
* invalid, but the reference was constructed during an earlier
* invocation to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws IncorrectObjectTypeException
* the object was not parsed yet and it was discovered during
* parsing that it is not actually a commit. This usually
* indicates the caller supplied a non-commit SHA-1 to
* {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws JGitInternalException
* a low-level exception of JGit has occurred. The original
* exception can be retrieved by calling
* {@link Exception#getCause()}. Expect only
* {@code IOException's} to be wrapped. Subclasses of
* {@link IOException} (e.g. {@link MissingObjectException}) are
* typically not wrapped here but thrown as original exception
*/
public LogCommand add(AnyObjectId start) throws MissingObjectException,
IncorrectObjectTypeException, JGitInternalException {
return add(true, start);
}
/**
* Same as {@code --not start}, or {@code ^start}
*
* @param start
* @return {@code this}
* @throws MissingObjectException
* the commit supplied is not available from the object
* database. This usually indicates the supplied commit is
* invalid, but the reference was constructed during an earlier
* invocation to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws IncorrectObjectTypeException
* the object was not parsed yet and it was discovered during
* parsing that it is not actually a commit. This usually
* indicates the caller supplied a non-commit SHA-1 to
* {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws JGitInternalException
* a low-level exception of JGit has occurred. The original
* exception can be retrieved by calling
* {@link Exception#getCause()}. Expect only
* {@code IOException's} to be wrapped. Subclasses of
* {@link IOException} (e.g. {@link MissingObjectException}) are
* typically not wrapped here but thrown as original exception
*/
public LogCommand not(AnyObjectId start) throws MissingObjectException,
IncorrectObjectTypeException, JGitInternalException {
return add(false, start);
}
/**
* Adds the range {@code since..until}
*
* @param since
* @param until
* @return {@code this}
* @throws MissingObjectException
* the commit supplied is not available from the object
* database. This usually indicates the supplied commit is
* invalid, but the reference was constructed during an earlier
* invocation to {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws IncorrectObjectTypeException
* the object was not parsed yet and it was discovered during
* parsing that it is not actually a commit. This usually
* indicates the caller supplied a non-commit SHA-1 to
* {@link RevWalk#lookupCommit(AnyObjectId)}.
* @throws JGitInternalException
* a low-level exception of JGit has occurred. The original
* exception can be retrieved by calling
* {@link Exception#getCause()}. Expect only
* {@code IOException's} to be wrapped. Subclasses of
* {@link IOException} (e.g. {@link MissingObjectException}) are
* typically not wrapped here but thrown as original exception
*/
public LogCommand addRange(AnyObjectId since, AnyObjectId until)
throws MissingObjectException, IncorrectObjectTypeException,
JGitInternalException {
return not(since).add(until);
}
/**
* Add all refs as commits to start the graph traversal from.
*
* @see #add(AnyObjectId)
* @return {@code this}
* @throws IOException
* the references could not be accessed
*/
public LogCommand all() throws IOException {
for (Ref ref : getRepository().getAllRefs().values()) {
ObjectId objectId = ref.getPeeledObjectId();
if (objectId == null)
objectId = ref.getObjectId();
add(objectId);
}
return this;
}
/**
* Show only commits that affect any of the specified paths. The path must
* either name a file or a directory exactly. Note that regex expressions or
* wildcards are not supported.
*
* @param path
* a path is relative to the top level of the repository
* @return {@code this}
*/
public LogCommand addPath(String path) {
checkCallable();
pathFilters.add(PathFilter.create(path));
return this;
}
/**
* Skip the number of commits before starting to show the commit output.
*
* @param skip
* the number of commits to skip
* @return {@code this}
*/
public LogCommand setSkip(int skip) {
checkCallable();
this.skip = skip;
return this;
}
/**
* Limit the number of commits to output.
*
* @param maxCount
* the limit
* @return {@code this}
*/
public LogCommand setMaxCount(int maxCount) {
checkCallable();
this.maxCount = maxCount;
return this;
}
private LogCommand add(boolean include, AnyObjectId start)
throws MissingObjectException, IncorrectObjectTypeException,
JGitInternalException {
checkCallable();
try {
if (include) {
walk.markStart(walk.lookupCommit(start));
startSpecified = true;
} else
walk.markUninteresting(walk.lookupCommit(start));
return this;
} catch (MissingObjectException e) {
throw e;
} catch (IncorrectObjectTypeException e) {
throw e;
} catch (IOException e) {
throw new JGitInternalException(MessageFormat.format(
JGitText.get().exceptionOccurredDuringAddingOfOptionToALogCommand
, start), e);
}
}
}