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/*
* Copyright (C) 2009-2010, Google Inc.
* Copyright (C) 2009, Robin Rosenberg
* Copyright (C) 2009, Robin Rosenberg <robin.rosenberg@dewire.com>
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
* 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.lib;
import java.io.IOException;
import org.eclipse.jgit.lib.RefUpdate.Result;
/**
* A RefUpdate combination for renaming a reference.
* <p>
* If the source reference is currently pointed to by {@code HEAD}, then the
* HEAD symbolic reference is updated to point to the new destination.
*/
public abstract class RefRename {
/** Update operation to read and delete the source reference. */
protected final RefUpdate source;
/** Update operation to create/overwrite the destination reference. */
protected final RefUpdate destination;
private Result result = Result.NOT_ATTEMPTED;
/**
* Initialize a new rename operation.
*
* @param src
* operation to read and delete the source.
* @param dst
* operation to create (or overwrite) the destination.
*/
protected RefRename(RefUpdate src, RefUpdate dst) {
source = src;
destination = dst;
String cmd = ""; //$NON-NLS-1$
if (source.getName().startsWith(Constants.R_HEADS)
&& destination.getName().startsWith(Constants.R_HEADS))
cmd = "Branch: "; //$NON-NLS-1$
setRefLogMessage(cmd + "renamed " //$NON-NLS-1$
+ Repository.shortenRefName(source.getName()) + " to " //$NON-NLS-1$
+ Repository.shortenRefName(destination.getName()));
}
/**
* Get identity of the user making the change in the reflog.
*
* @return identity of the user making the change in the reflog.
*/
public PersonIdent getRefLogIdent() {
return destination.getRefLogIdent();
}
/**
* Set the identity of the user appearing in the reflog.
* <p>
* The timestamp portion of the identity is ignored. A new identity with the
* current timestamp will be created automatically when the rename occurs
* and the log record is written.
*
* @param pi
* identity of the user. If null the identity will be
* automatically determined based on the repository
* configuration.
*/
public void setRefLogIdent(PersonIdent pi) {
destination.setRefLogIdent(pi);
}
/**
* Get the message to include in the reflog.
*
* @return message the caller wants to include in the reflog; null if the
* rename should not be logged.
*/
public String getRefLogMessage() {
return destination.getRefLogMessage();
}
/**
* Set the message to include in the reflog.
*
* @param msg
* the message to describe this change.
*/
public void setRefLogMessage(String msg) {
if (msg == null)
disableRefLog();
else
destination.setRefLogMessage(msg, false);
}
/**
* Don't record this rename in the ref's associated reflog.
*/
public void disableRefLog() {
destination.setRefLogMessage("", false); //$NON-NLS-1$
}
/**
* Get result of rename operation
*
* @return result of rename operation
*/
public Result getResult() {
return result;
}
/**
* Rename
*
* @return the result of the new ref update
* @throws java.io.IOException
*/
public Result rename() throws IOException {
try {
result = doRename();
return result;
} catch (IOException err) {
result = Result.IO_FAILURE;
throw err;
}
}
/**
* Do the actual rename
*
* @return the result of the rename operation.
* @throws java.io.IOException
*/
protected abstract Result doRename() throws IOException;
/**
* Whether the {@code Constants#HEAD} reference needs to be linked to the
* new destination name.
*
* @return true if the {@code Constants#HEAD} reference needs to be linked
* to the new destination name.
* @throws java.io.IOException
* the current value of {@code HEAD} cannot be read.
*/
protected boolean needToUpdateHEAD() throws IOException {
Ref head = source.getRefDatabase().exactRef(Constants.HEAD);
if (head != null && head.isSymbolic()) {
head = head.getTarget();
return head.getName().equals(source.getName());
}
return false;
}
}
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