Added a new package org.eclipse.jgit.api and a builder-style API for jgit. Added also the first implementation for two git commands: Commit and Log. This API is intended to be used by external components when functionalities of the standard git commands are required. It will also help to ease writing JGit tests. For internal usages this API may often not be optimal because the git commands are doing much more than required or they expect parameters of an unappropriate type. Change-Id: I71ac4839ab9d2f848307eba9252090c586b4146b Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>

14 years ago · f3fb5824ba
--- a/org.eclipse.jgit.test/META-INF/MANIFEST.MF
+++ b/org.eclipse.jgit.test/META-INF/MANIFEST.MF
@@ -9,6 +9,7 @@ Bundle-ActivationPolicy: lazy
 Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Import-Package: junit.framework;version="[3.8.2,4.0.0)",
 junit.textui;version="[3.8.2,4.0.0)",
 org.eclipse.jgit.api;version="[0.8.0,0.9.0)",
 org.eclipse.jgit.diff;version="[0.8.0,0.9.0)",
 org.eclipse.jgit.dircache;version="[0.8.0,0.9.0)",
 org.eclipse.jgit.errors;version="[0.8.0,0.9.0)",
--- a/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/CommitAndLogCommandTests.java
+++ b/org.eclipse.jgit.test/tst/org/eclipse/jgit/api/CommitAndLogCommandTests.java
@@ -0,0 +1,117 @@
 /*
 * 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 org.eclipse.jgit.errors.UnmergedPathException;
 import org.eclipse.jgit.lib.PersonIdent;
 import org.eclipse.jgit.lib.RepositoryTestCase;
 import org.eclipse.jgit.revwalk.RevCommit;

 public class CommitAndLogCommandTests extends RepositoryTestCase {
 	public void testSomeCommits() throws NoHeadException, NoMessageException,
 			UnmergedPathException, ConcurrentRefUpdateException {

 		// do 4 commits
 		Git git = new Git(db);
 		git.commit().setMessage("initial commit").call();
 		git.commit().setMessage("second commit").setCommitter(committer).call();
 		git.commit().setMessage("third commit").setAuthor(author).call();
 		git.commit().setMessage("fourth commit").setAuthor(author)
 				.setCommitter(committer).call();
 		Iterable<RevCommit> commits = git.log().call();

 		// check that all commits came in correctly
 		PersonIdent defaultCommitter = new PersonIdent(db);
 		PersonIdent expectedAuthors[] = new PersonIdent[] {
 				defaultCommitter, committer, author, author };
 		PersonIdent expectedCommitters[] = new PersonIdent[] {
 				defaultCommitter, committer, defaultCommitter, committer };
 		String expectedMessages[] = new String[] { "initial commit",
 				"second commit", "third commit", "fourth commit" };
 		int l = expectedAuthors.length - 1;
 		for (RevCommit c : commits) {
 			assertEquals(expectedAuthors[l].getName(), c.getAuthorIdent()
 					.getName());
 			assertEquals(expectedCommitters[l].getName(), c.getCommitterIdent()
 					.getName());
 			assertEquals(c.getFullMessage(), expectedMessages[l]);
 			l--;
 		}
 		assertEquals(l, -1);
 	}

 	// try to do a commit without specifying a message. Should fail!
 	public void testWrongParams() throws UnmergedPathException,
 			NoHeadException, ConcurrentRefUpdateException {
 		Git git = new Git(db);
 		try {
 			git.commit().setAuthor(author).call();
 			fail("Didn't get the expected exception");
 		} catch (NoMessageException e) {
 		}
 	}

 	// try to work with Commands after command has been invoked. Should throw
 	// exceptions
 	public void testMultipleInvocations() throws NoHeadException,
 			ConcurrentRefUpdateException, NoMessageException,
 			UnmergedPathException {
 		Git git = new Git(db);
 		CommitCommand commitCmd = git.commit();
 		commitCmd.setMessage("initial commit").call();
 		try {
 			// check that setters can't be called after invocation
 			commitCmd.setAuthor(author);
 			fail("didn't catch the expected exception");
 		} catch (IllegalStateException e) {
 		}
 		LogCommand logCmd = git.log();
 		logCmd.call();
 		try {
 			// check that call can't be called twice
 			logCmd.call();
 			fail("didn't catch the expected exception");
 		} catch (IllegalStateException e) {
 		}
 	}
 }
--- a/org.eclipse.jgit/META-INF/MANIFEST.MF
+++ b/org.eclipse.jgit/META-INF/MANIFEST.MF
@@ -5,7 +5,8 @@ Bundle-SymbolicName: org.eclipse.jgit
 Bundle-Version: 0.8.0.qualifier
 Bundle-Localization: plugin
 Bundle-Vendor: %provider_name
 Export-Package: org.eclipse.jgit.diff;version="0.8.0",
 Export-Package: org.eclipse.jgit.api;version="0.8.0",
 org.eclipse.jgit.diff;version="0.8.0",
 org.eclipse.jgit.dircache;version="0.8.0",
 org.eclipse.jgit.errors;version="0.8.0",
 org.eclipse.jgit.fnmatch;version="0.8.0",
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/CommitCommand.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/CommitCommand.java
@@ -0,0 +1,299 @@
 /*
 * 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 org.eclipse.jgit.dircache.DirCache;
 import org.eclipse.jgit.errors.UnmergedPathException;
 import org.eclipse.jgit.lib.Commit;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.ObjectId;
 import org.eclipse.jgit.lib.ObjectWriter;
 import org.eclipse.jgit.lib.PersonIdent;
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.RefUpdate;
 import org.eclipse.jgit.lib.RefUpdate.Result;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevWalk;

 /**
 * A class used to execute a {@code Commit} command. It has setters for all
 * supported options and arguments of this command and a {@link #call()} method
 * to finally execute the command.
 *
 * @see <a
 *      href="http://www.kernel.org/pub/software/scm/git/docs/git-commit.html"
 *      >Git documentation about Commit</a>
 */
 public class CommitCommand extends GitCommand<RevCommit> {
 	private PersonIdent author;

 	private PersonIdent committer;

 	private String message;

 	/**
 	 * @param repo
 	 */
 	protected CommitCommand(Repository repo) {
 		super(repo);
 	}

 	/**
 	 * Executes the {@code commit} command with all the options and parameters
 	 * collected by the setter methods of this class. Each instance of this
 	 * class should only be used for one invocation of the command (means: one
 	 * call to {@link #call()})
 	 *
 	 * @return a {@link Commit} object representing the successful commit
 	 * @throws NoHeadException
 	 *             when called on a git repo without a HEAD reference
 	 * @throws NoMessageException
 	 *             when called without specifying a commit message
 	 * @throws UnmergedPathException
 	 *             when the current index contained unmerged pathes (conflicts)
 	 * @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 UnmergedPathException}) are
 	 *             typically not wrapped here but thrown as original exception
 	 */
 	public RevCommit call() throws NoHeadException, NoMessageException,
 			UnmergedPathException, ConcurrentRefUpdateException,
 			JGitInternalException {
 		checkCallable();
 		processOptions();

 		try {
 			Ref head = repo.getRef(Constants.HEAD);
 			if (head == null)
 				throw new NoHeadException(
 						"Commit on repo without HEAD currently not supported");

 			// determine the current HEAD and the commit it is referring to
 			ObjectId parentID = repo.resolve(Constants.HEAD + "^{commit}");

 			// lock the index
 			DirCache index = DirCache.lock(repo);
 			try {
 				ObjectWriter repoWriter = new ObjectWriter(repo);

 				// Write the index as tree to the object database. This may fail
 				// for example when the index contains unmerged pathes
 				// (unresolved conflicts)
 				ObjectId indexTreeId = index.writeTree(repoWriter);

 				// Create a Commit object, populate it and write it
 				Commit commit = new Commit(repo);
 				commit.setCommitter(committer);
 				commit.setAuthor(author);
 				commit.setMessage(message);
 				if (parentID != null)
 					commit.setParentIds(new ObjectId[] { parentID });
 				commit.setTreeId(indexTreeId);
 				ObjectId commitId = repoWriter.writeCommit(commit);

 				RevCommit revCommit = new RevWalk(repo).parseCommit(commitId);
 				RefUpdate ru = repo.updateRef(Constants.HEAD);
 				ru.setNewObjectId(commitId);
 				ru.setRefLogMessage("commit : " + revCommit.getShortMessage(),
 						false);

 				ru.setExpectedOldObjectId(parentID);
 				Result rc = ru.update();
 				switch (rc) {
 				case NEW:
 				case FAST_FORWARD:
 					setCallable(false);
 					return revCommit;
 				case REJECTED:
 				case LOCK_FAILURE:
 					throw new ConcurrentRefUpdateException(
 							"Could lock HEAD during commit", ru.getRef(), rc);
 				default:
 					throw new JGitInternalException(
 							"Updating the ref "
 									+ Constants.HEAD
 									+ " to "
 									+ commitId.toString()
 									+ " failed. ReturnCode from RefUpdate.update() was "
 									+ rc);
 				}
 			} finally {
 				index.unlock();
 			}
 		} catch (UnmergedPathException e) {
 			// since UnmergedPathException is a subclass of IOException
 			// which should not be wrapped by a JGitInternalException we
 			// have to catch and re-throw it here
 			throw e;
 		} catch (IOException e) {
 			throw new JGitInternalException(
 					"Exception caught during execution of commit command", e);
 		}
 	}

 	/**
 	 * Sets default values for not explicitly specified options. Then validates
 	 * that all required data has been provided.
 	 *
 	 * @throws NoMessageException
 	 *             if the commit message has not been specified
 	 */
 	private void processOptions() throws NoMessageException {
 		if (message == null)
 			// as long as we don't suppport -C option we have to have
 			// an explicit message
 			throw new NoMessageException("commit message not specified");
 		if (committer == null)
 			committer = new PersonIdent(repo);
 		if (author == null)
 			author = committer;
 	}

 	/**
 	 * @param message
 	 *            the commit message used for the {@code commit}
 	 * @return {@code this}
 	 */
 	public CommitCommand setMessage(String message) {
 		checkCallable();
 		this.message = message;
 		return this;
 	}

 	/**
 	 * @return the commit message used for the <code>commit</code>
 	 */
 	public String getMessage() {
 		return message;
 	}

 	/**
 	 * Sets the committer for this {@code commit}. If no committer is explicitly
 	 * specified because this method is never called or called with {@code null}
 	 * value then the committer will be deduced from config info in repository,
 	 * with current time.
 	 *
 	 * @param committer
 	 *            the committer used for the {@code commit}
 	 * @return {@code this}
 	 */
 	public CommitCommand setCommitter(PersonIdent committer) {
 		checkCallable();
 		this.committer = committer;
 		return this;
 	}

 	/**
 	 * Sets the committer for this {@code commit}. If no committer is explicitly
 	 * specified because this method is never called or called with {@code null}
 	 * value then the committer will be deduced from config info in repository,
 	 * with current time.
 	 *
 	 * @param name
 	 *            the name of the committer used for the {@code commit}
 	 * @param email
 	 *            the email of the committer used for the {@code commit}
 	 * @return {@code this}
 	 */
 	public CommitCommand setCommitter(String name, String email) {
 		checkCallable();
 		return setCommitter(new PersonIdent(name, email));
 	}

 	/**
 	 * @return the committer used for the {@code commit}. If no committer was
 	 *         specified {@code null} is returned and the default
 	 *         {@link PersonIdent} of this repo is used during execution of the
 	 *         command
 	 */
 	public PersonIdent getCommitter() {
 		return committer;
 	}

 	/**
 	 * Sets the author for this {@code commit}. If no author is explicitly
 	 * specified because this method is never called or called with {@code null}
 	 * value then the author will be set to the committer.
 	 *
 	 * @param author
 	 *            the author used for the {@code commit}
 	 * @return {@code this}
 	 */
 	public CommitCommand setAuthor(PersonIdent author) {
 		checkCallable();
 		this.author = author;
 		return this;
 	}

 	/**
 	 * Sets the author for this {@code commit}. If no author is explicitly
 	 * specified because this method is never called or called with {@code null}
 	 * value then the author will be set to the committer.
 	 *
 	 * @param name
 	 *            the name of the author used for the {@code commit}
 	 * @param email
 	 *            the email of the author used for the {@code commit}
 	 * @return {@code this}
 	 */
 	public CommitCommand setAuthor(String name, String email) {
 		checkCallable();
 		return setAuthor(new PersonIdent(name, email));
 	}

 	/**
 	 * @return the author used for the {@code commit}. If no author was
 	 *         specified {@code null} is returned and the default
 	 *         {@link PersonIdent} of this repo is used during execution of the
 	 *         command
 	 */
 	public PersonIdent getAuthor() {
 		return author;
 	}
 }
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/ConcurrentRefUpdateException.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/ConcurrentRefUpdateException.java
@@ -0,0 +1,84 @@
 /*
 * 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 org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.lib.RefUpdate;

 /**
 * Exception thrown when a command want's to update a ref but failed because
 * another process is accessing (or even also updating) the ref.
 *
 * @see RefUpdate.Result#LOCK_FAILURE
 */
 public class ConcurrentRefUpdateException extends GitAPIException {
 	private static final long serialVersionUID = 1L;
 	private RefUpdate.Result rc;
 	private Ref ref;

 	ConcurrentRefUpdateException(String message, Ref ref,
 			RefUpdate.Result rc, Throwable cause) {
 		super((rc == null) ? message : message
 				+ ". RefUpdate return code was: " + rc, cause);
 		this.rc = rc;
 		this.ref = ref;
 	}

 	ConcurrentRefUpdateException(String message, Ref ref,
 			RefUpdate.Result rc) {
 		super((rc == null) ? message : message
 				+ ". RefUpdate return code was: " + rc);
 		this.rc = rc;
 		this.ref = ref;
 	}

 	/**
 	 * @return the {@link Ref} which was tried to by updated
 	 */
 	public Ref getRef() {
 		return ref;
 	}

 	/**
 	 * @return the result which was returned by {@link RefUpdate#update()} and
 	 *         which caused this error
 	 */
 	public RefUpdate.Result getResult() {
 		return rc;
 	}
 }
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/Git.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/Git.java
@@ -0,0 +1,128 @@
 /*
 * 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 org.eclipse.jgit.lib.Repository;

 /**
 * Offers a "GitPorcelain"-like API to interact with a git repository.
 * <p>
 * The GitPorcelain commands are described in the <a href="http://www.kernel.org/pub/software/scm/git/docs/git.html#_high_level_commands_porcelain"
 * >Git Documentation</a>.
 * <p>
 * This class only offers methods to construct so-called command classes. Each
 * GitPorcelain command is represented by one command class.<br>
 * Example: this class offers a {@code commit()} method returning an instance of
 * the {@code CommitCommand} class. The {@code CommitCommand} class has setters
 * for all the arguments and options. The {@code CommitCommand} class also has a
 * {@code call} method to actually execute the commit. The following code show's
 * how to do a simple commit:
 *
 * <pre>
 * Git git = new Git(myRepo);
 * git.commit().setMessage(&quot;Fix393&quot;).setAuthor(developerIdent).call();
 * </pre>
 *
 * All mandatory parameters for commands have to be specified in the methods of
 * this class, the optional parameters have to be specified by the
 * setter-methods of the Command class.
 * <p>
 * This class is intended to be used internally (e.g. by JGit tests) or by
 * external components (EGit, third-party tools) when they need exactly the
 * functionality of a GitPorcelain command. There are use-cases where this class
 * is not optimal and where you should use the more low-level JGit classes. The
 * methods in this class may for example offer too much functionality or they
 * offer the functionality with the wrong arguments.
 */
 public class Git {
 	/** The git repository this class is interacting with */
 	private final Repository repo;

 	/**
 	 * Constructs a new {@link Git} class which can interact with the specified
 	 * git repository. All command classes returned by methods of this class
 	 * will always interact with this git repository.
 	 *
 	 * @param repo
 	 *            the git repository this class is interacting with.
 	 *            {@code null} is not allowed
 	 */
 	public Git(Repository repo) {
 		if (repo == null)
 			throw new NullPointerException();
 		this.repo = repo;
 	}

 	/**
 	 * Returns a command class to execute a {@code Commit} command
 	 *
 	 * @see <a
 	 *      href="http://www.kernel.org/pub/software/scm/git/docs/git-commit.html"
 	 *      >Git documentation about Commit</a>
 	 * @return a {@link CommitCommand} used to collect all optional parameters
 	 *         and to finally execute the {@code Commit} command
 	 */
 	public CommitCommand commit() {
 		return new CommitCommand(repo);
 	}

 	/**
 	 * Returns a command class to execute a {@code Log} command
 	 *
 	 * @see <a
 	 *      href="http://www.kernel.org/pub/software/scm/git/docs/git-log.html"
 	 *      >Git documentation about Log</a>
 	 * @return a {@link LogCommand} used to collect all optional parameters and
 	 *         to finally execute the {@code Log} command
 	 */
 	public LogCommand log() {
 		return new LogCommand(repo);
 	}

 	/**
 	 * @return the git repository this class is interacting with
 	 */
 	public Repository getRepository() {
 		return repo;
 	}
 }
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/GitAPIException.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/GitAPIException.java
@@ -0,0 +1,55 @@
 /*
 * 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;

 /**
 * Superclass of all exceptions thrown by the API classes in
 * {@code org.eclipse.jgit.api}
 *
 */
 public abstract class GitAPIException extends Exception {
 	private static final long serialVersionUID = 1L;

 	GitAPIException(String message, Throwable cause) {
 		super(message, cause);
 	}

 	GitAPIException(String message) {
 		super(message);
 	}
 }
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/GitCommand.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/GitCommand.java
@@ -0,0 +1,117 @@
 /*
 * 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.util.concurrent.Callable;

 import org.eclipse.jgit.lib.Repository;

 /**
 * Common superclass of all commands in the package {@code org.eclipse.jgit.api}
 * <p>
 * This class ensures that all commands fulfill the {@link Callable} interface.
 * It also has a property {@link #repo} holding a reference to the git
 * {@link Repository} this command should work with.
 * <p>
 * Finally this class stores a state telling whether it is allowed to call
 * {@link #call()} on this instance. Instances of {@link GitCommand} can only be
 * used for one single successful call to {@link #call()}. Afterwards this
 * instance may not be used anymore to set/modify any properties or to call
 * {@link #call()} again. This is achieved by setting the {@link #callable}
 * property to false after the successful execution of {@link #call()} and to
 * check the state (by calling {@link #checkCallable()}) before setting of
 * properties and inside {@link #call()}.
 *
 * @param <T>
 *            the return type which is expected from {@link #call()}
 */
 public abstract class GitCommand<T> implements Callable<T> {
 	/** The repository this command is working with */
 	final protected Repository repo;

 	/**
 	 * a state which tells whether it is allowed to call {@link #call()} on this
 	 * instance.
 	 */
 	private boolean callable = true;

 	/**
 	 * Creates a new command which interacts with a single repository
 	 *
 	 * @param repo
 	 *            the {@link Repository} this command should interact with
 	 */
 	protected GitCommand(Repository repo) {
 		this.repo = repo;
 	}

 	/**
 	 * @return the {@link Repository} this command is interacting with
 	 */
 	public Repository getRepository() {
 		return repo;
 	}

 	/**
 	 * Set's the state which tells whether it is allowed to call {@link #call()}
 	 * on this instance. {@link #checkCallable()} will throw an exception when
 	 * called and this property is set to {@code false}
 	 *
 	 * @param callable
 	 *            if <code>true</code> it is allowed to call {@link #call()} on
 	 *            this instance.
 	 */
 	protected void setCallable(boolean callable) {
 		this.callable = callable;
 	}

 	/**
 	 * Checks that the property {@link #callable} is {@code true}. If not then
 	 * an {@link IllegalStateException} is thrown
 	 *
 	 * @throws IllegalStateException
 	 *             when this method is called and the property {@link #callable}
 	 *             is {@code false}
 	 */
 	protected void checkCallable() {
 		if (!callable)
 			throw new IllegalStateException("Command "
 					+ this.getClass().getName()
 					+ " was called in the wrong state");
 	}
 }
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/JGitInternalException.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/JGitInternalException.java
@@ -0,0 +1,69 @@
 /*
 * 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;

 /**
 * Exception thrown when during command execution a low-level exception from the
 * JGit library is thrown. Also when certain low-level error situations are
 * reported by JGit through return codes this Exception will be thrown.
 * <p>
 * During command execution a lot of exceptions may be thrown. Some of them
 * represent error situations which can be handled specifically by the caller of
 * the command. But a lot of exceptions are so low-level that is is unlikely
 * that the caller of the command can handle them effectively. The huge number
 * of these low-level exceptions which are thrown by the commands lead to a
 * complicated and wide interface of the commands. Callers of the API have to
 * deal with a lot of exceptions they don't understand.
 * <p>
 * To overcome this situation this class was introduced. Commands will wrap all
 * exceptions they declare as low-level in their context into an instance of
 * this class. Callers of the commands have to deal with one type of low-level
 * exceptions. Callers will always get access to the original exception (if
 * available) by calling {@code #getCause()}.
 */
 public class JGitInternalException extends RuntimeException {
 	private static final long serialVersionUID = 1L;

 	JGitInternalException(String message, Throwable cause) {
 		super(message, cause);
 	}

 	JGitInternalException(String message) {
 		super(message);
 	}
 }
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/LogCommand.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/LogCommand.java
@@ -0,0 +1,222 @@
 /*
 * 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 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.Repository;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.jgit.revwalk.RevWalk;

 /**
 * 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;

 	/**
 	 * @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 (!startSpecified) {
 			try {
 				ObjectId headId = repo.resolve(Constants.HEAD);
 				if (headId == null)
 					throw new NoHeadException(
 							"No HEAD exists and no explicit starting revision was specified");
 				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(
 						"An exception occured while trying to add the Id of HEAD",
 						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);
 	}

 	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(
 					"Exception occured during adding of " + start
 							+ " as option to a Log command", e);
 		}
 	}
 }
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/NoHeadException.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/NoHeadException.java
@@ -0,0 +1,54 @@
 /*
 * 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;

 /**
 * Exception thrown when a command expected the {@code HEAD} reference to exist
 * but couldn't find such a reference
 */
 public class NoHeadException extends GitAPIException {
 	private static final long serialVersionUID = 1L;

 	NoHeadException(String message, Throwable cause) {
 		super(message, cause);
 	}

 	NoHeadException(String message) {
 		super(message);
 	}
 }
--- a/org.eclipse.jgit/src/org/eclipse/jgit/api/NoMessageException.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/api/NoMessageException.java
@@ -0,0 +1,56 @@
 /*
 * 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;

 /**
 * Exception thrown when the options given to a command doesn't include a
 * specification of a message text (e.g. a commit was called without explicitly
 * specifying a commit message (or other options telling where to take the
 * message from.
 */
 public class NoMessageException extends GitAPIException {
 	private static final long serialVersionUID = 1L;

 	NoMessageException(String message, Throwable cause) {
 		super(message, cause);
 	}

 	NoMessageException(String message) {
 		super(message);
 	}
 }