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/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.idea.svn.history;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.Ref;
import com.intellij.openapi.vcs.VcsException;
import com.intellij.openapi.vfs.VirtualFile;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.idea.svn.RootUrlInfo;
import org.jetbrains.idea.svn.SvnFileUrlMapping;
import org.jetbrains.idea.svn.SvnUtil;
import org.jetbrains.idea.svn.SvnVcs;
import org.jetbrains.idea.svn.commandLine.SvnBindException;
import org.jetbrains.idea.svn.info.Info;
import org.tmatesoft.svn.core.*;
import org.tmatesoft.svn.core.internal.util.SVNURLUtil;
import org.tmatesoft.svn.core.wc.SVNRevision;
import org.tmatesoft.svn.core.wc2.SvnTarget;
import java.util.Map;
public class LatestExistentSearcher {
private static final Logger LOG = Logger.getInstance(LatestExistentSearcher.class);
private long myStartNumber;
private boolean myStartExistsKnown;
@NotNull private final SVNURL myUrl;
@NotNull private final SVNURL myRepositoryUrl;
@NotNull private final String myRelativeUrl;
private final SvnVcs myVcs;
private long myEndNumber;
public LatestExistentSearcher(final SvnVcs vcs, @NotNull SVNURL url, @NotNull SVNURL repositoryUrl) {
this(0, -1, false, vcs, url, repositoryUrl);
}
public LatestExistentSearcher(final long startNumber,
final long endNumber,
final boolean startExistsKnown,
final SvnVcs vcs,
@NotNull SVNURL url,
@NotNull SVNURL repositoryUrl) {
myStartNumber = startNumber;
myEndNumber = endNumber;
myStartExistsKnown = startExistsKnown;
myVcs = vcs;
myUrl = url;
myRepositoryUrl = repositoryUrl;
// TODO: Make utility method that compare relative urls checking all possible cases when start/end slash exists or not.
myRelativeUrl = SvnUtil.ensureStartSlash(SVNURLUtil.getRelativeURL(myRepositoryUrl, myUrl, true));
}
public long getDeletionRevision() {
if (! detectStartRevision()) return -1;
final Ref<Long> latest = new Ref<Long>(myStartNumber);
try {
if (myEndNumber == -1) {
myEndNumber = getLatestRevision();
}
final SVNURL existingParent = getExistingParent(myUrl);
if (existingParent == null) {
return myStartNumber;
}
final SVNRevision startRevision = SVNRevision.create(myStartNumber);
SvnTarget target = SvnTarget.fromURL(existingParent, startRevision);
myVcs.getFactory(target).createHistoryClient().doLog(target, startRevision, SVNRevision.HEAD, false, true, false, 0, null,
createHandler(latest));
}
catch (VcsException e) {
LOG.info(e);
}
return latest.get().longValue();
}
@NotNull
private LogEntryConsumer createHandler(@NotNull final Ref<Long> latest) {
return new LogEntryConsumer() {
@Override
public void consume(final LogEntry logEntry) throws SVNException {
final Map changedPaths = logEntry.getChangedPaths();
for (Object o : changedPaths.values()) {
final LogEntryPath path = (LogEntryPath)o;
if ((path.getType() == 'D') && (myRelativeUrl.equals(path.getPath()))) {
latest.set(logEntry.getRevision());
throw new SVNException(SVNErrorMessage.UNKNOWN_ERROR_MESSAGE);
}
}
}
};
}
public long getLatestExistent() {
if (! detectStartRevision()) return myStartNumber;
long latestOk = myStartNumber;
try {
if (myEndNumber == -1) {
myEndNumber = getLatestRevision();
}
// TODO: At least binary search could be applied here for optimization
for (long i = myStartNumber + 1; i < myEndNumber; i++) {
if (existsInRevision(myUrl, i)) {
latestOk = i;
}
}
}
catch (SvnBindException e) {
LOG.info(e);
}
return latestOk;
}
private boolean detectStartRevision() {
if (! myStartExistsKnown) {
final SvnFileUrlMapping mapping = myVcs.getSvnFileUrlMapping();
final RootUrlInfo rootUrlInfo = mapping.getWcRootForUrl(myUrl.toString());
if (rootUrlInfo == null) return true;
final VirtualFile vf = rootUrlInfo.getVirtualFile();
final Info info = myVcs.getInfo(vf);
if ((info == null) || (info.getRevision() == null)) {
return false;
}
myStartNumber = info.getRevision().getNumber();
myStartExistsKnown = true;
}
return true;
}
@Nullable
private SVNURL getExistingParent(SVNURL url) throws SvnBindException {
while (url != null && !url.equals(myRepositoryUrl) && !existsInRevision(url, myEndNumber)) {
url = SvnUtil.removePathTail(url);
}
return url;
}
private boolean existsInRevision(@NotNull SVNURL url, long revisionNumber) throws SvnBindException {
SVNRevision revision = SVNRevision.create(revisionNumber);
Info info = null;
try {
info = myVcs.getInfo(url, revision, revision);
}
catch (SvnBindException e) {
// throw error if not "does not exist" error code
if (!e.contains(SVNErrorCode.RA_ILLEGAL_URL)) {
throw e;
}
}
return info != null;
}
private long getLatestRevision() throws SvnBindException {
return SvnUtil.getHeadRevision(myVcs, myRepositoryUrl).getNumber();
}
}
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