/*
* Copyright (c) 2013 TMate Software Ltd
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* For information on how to redistribute this software under
* the terms of a license other than GNU General Public License
* contact TMate Software at support@hg4j.com
*/
package org.tmatesoft.hg.internal;
import static org.tmatesoft.hg.core.HgIterateDirection.NewToOld;
import static org.tmatesoft.hg.core.HgIterateDirection.OldToNew;
import java.util.Collections;
import java.util.LinkedList;
import org.tmatesoft.hg.core.HgIterateDirection;
import org.tmatesoft.hg.core.Nodeid;
import org.tmatesoft.hg.internal.FileRenameHistory.Chunk;
import org.tmatesoft.hg.repo.HgDataFile;
import org.tmatesoft.hg.repo.HgRuntimeException;
/**
* History of a file, with copy/renames, and corresponding revision information.
* Facility for file history iteration.
*
* TODO [post-1.1] Utilize in HgLogCommand and anywhere else we need to follow file history
*
* @author Artem Tikhomirov
* @author TMate Software Ltd.
*/
public class FileHistory {
private LinkedList<FileRevisionHistoryChunk> fileCompleteHistory = new LinkedList<FileRevisionHistoryChunk>();
private final HgDataFile df;
private final int csetTo;
private final int csetFrom;
public FileHistory(HgDataFile file, int fromChangeset, int toChangeset) {
df = file;
csetFrom = fromChangeset;
csetTo = toChangeset;
}
public int getStartChangeset() {
return csetFrom;
}
public int getEndChangeset() {
return csetTo;
}
public void build() throws HgRuntimeException {
fileCompleteHistory.clear(); // just in case, #build() is not expected to be called more than once
Nodeid fileRev = df.getRepo().getManifest().getFileRevision(csetTo, df.getPath());
int fileRevIndex = df.getRevisionIndex(fileRev);
FileRenameHistory frh = new FileRenameHistory(csetFrom, csetTo);
if (frh.isOutOfRange(df, fileRevIndex)) {
return;
}
frh.build(df, fileRevIndex);
FileRevisionHistoryChunk prevChunk = null;
for (Chunk c : frh.iterate(OldToNew)) {
FileRevisionHistoryChunk fileHistory = new FileRevisionHistoryChunk(c.file(), c.firstCset(), c.lastCset(), c.firstFileRev(), c.lastFileRev());
fileHistory.init();
if (fileHistory.revisionCount() == 0) {
// no revisions on our cset range of interest
continue;
}
if (prevChunk != null) {
prevChunk.linkTo(fileHistory);
}
fileCompleteHistory.addLast(fileHistory); // to get the list in old-to-new order
prevChunk = fileHistory;
}
// fileCompleteHistory is in (origin, intermediate target, ultimate target) order
}
public Iterable<FileRevisionHistoryChunk> iterate(HgIterateDirection order) {
if (order == NewToOld) {
return ReverseIterator.reversed(fileCompleteHistory);
}
return Collections.unmodifiableList(fileCompleteHistory);
}
}