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/*******************************************************************************
* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.internal.ccvs.ui.operations;
import java.util.*;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.team.core.TeamException;
import org.eclipse.team.internal.ccvs.core.*;
import org.eclipse.team.internal.ccvs.core.client.*;
import org.eclipse.team.internal.ccvs.core.client.listeners.LogEntry;
import org.eclipse.team.internal.ccvs.core.client.listeners.LogListener;
import org.eclipse.team.internal.ccvs.core.resources.CVSWorkspaceRoot;
import org.eclipse.team.internal.ccvs.core.util.Util;
import org.eclipse.team.internal.ccvs.ui.Policy;
import org.eclipse.ui.IWorkbenchPart;
/**
* Performs an rlog on the resources and caches the results.
*/
public class RemoteLogOperation extends RepositoryLocationOperation {
private RLog rlog = new RLog();
private CVSTag tag1;
private CVSTag tag2;
private LogEntryCache entryCache;
/**
* A log entry cache that can be shared by multiple instances of the
* remote log operation.
*/
public static class LogEntryCache {
/*
* Map that is used for the single revision cases
*/
private Map entries = new HashMap(); /* Map ICVSRemoteFile->ILogEntry */
/*
* Map that is used to cache multiple ILogEntry for a single resource
*/
private Map allEntries = new HashMap(); /* Map String->ILogEntry[] */
/**
* Return the log entry that was fetch for the given resource
* or <code>null</code> if no entry was fetched.
* @param getFullPath(resource) the resource
* @return the fetched log entry or <code>null</code>
*/
public synchronized ILogEntry getLogEntry(ICVSRemoteResource resource) {
return (ILogEntry)entries.get(resource);
}
/**
* Return the log entries that were fetched for the given resource
* or an empty list if no entry was fetched.
* @param getFullPath(resource) the resource
* @return the fetched log entries or an empty list is none were found
*/
public synchronized ILogEntry[] getLogEntries(ICVSRemoteResource resource) {
return (ILogEntry[])allEntries.get(getFullPath(resource));
}
/*
* Return the full path that uniquely identifies the resource
* accross repositories. This path include the repository and
* resource path but does not include the revision so that
* all log entries for a file can be retrieved.
*/
private String getFullPath(ICVSRemoteResource resource) {
return Util.appendPath(resource.getRepository().getLocation(), resource.getRepositoryRelativePath());
}
public synchronized void clearEntries() {
entries.clear();
allEntries.clear();
}
public synchronized void cacheEntries(ICVSRemoteResource[] remotes, LogListener listener) {
// Record the log entries for the files we want
for (int i = 0; i < remotes.length; i++) {
ICVSRemoteResource resource = remotes[i];
if (!resource.isContainer()) {
ICVSRemoteFile file = (ICVSRemoteFile) resource;
ILogEntry entry = listener.getEntryFor(file);
if (entry != null) {
entries.put(file, entry);
}
ILogEntry allLogs[] = listener.getEntriesFor(file);
allEntries.put(getFullPath(file), allLogs);
}
}
}
public synchronized ICVSRemoteFile getImmediatePredecessor(ICVSRemoteFile file) throws TeamException {
ILogEntry[] allLogs = (ILogEntry[])allEntries.get(getFullPath(file));
String revision = file.getRevision();
// First decrement the last digit and see if that revision exists
String predecessorRevision = getPredecessorRevision(revision);
ICVSRemoteFile predecessor = findRevison(allLogs, predecessorRevision);
// If nothing was found, try to fond the base of a branch
if (predecessor == null && isBrancheRevision(revision)) {
predecessorRevision = getBaseRevision(revision);
predecessor = findRevison(allLogs, predecessorRevision);
}
// If that fails, it is still possible that there is a revision.
// This can happen if the revision has been manually set.
if (predecessor == null) {
// We don't search in this case since this is costly and would be done
// for any file that is new as well.
}
return predecessor;
}
/*
* Find the given revision in the list of log entries.
* Return null if the revision wasn't found.
*/
private ICVSRemoteFile findRevison(ILogEntry[] allLogs, String predecessorRevision) throws TeamException {
for (int i = 0; i < allLogs.length; i++) {
ILogEntry entry = allLogs[i];
ICVSRemoteFile file = entry.getRemoteFile();
if (file.getRevision().equals(predecessorRevision)) {
return file;
}
}
return null;
}
/*
* Decrement the trailing digit by one.
*/
private String getPredecessorRevision(String revision) {
int digits[] = Util.convertToDigits(revision);
digits[digits.length -1]--;
StringBuffer buffer = new StringBuffer(revision.length());
for (int i = 0; i < digits.length; i++) {
buffer.append(Integer.toString(digits[i]));
if (i < digits.length - 1) {
buffer.append('.');
}
}
return buffer.toString();
}
/*
* Return true if there are more than 2 digits in the revision number
* (i.e. the revision is on a branch)
*/
private boolean isBrancheRevision(String revision) {
return Util.convertToDigits(revision).length > 2;
}
/*
* Remove the trailing revision digits such that the
* returned revision is shorter than the given revision
* and is an even number of digits long
*/
private String getBaseRevision(String revision) {
int digits[] = Util.convertToDigits(revision);
int length = digits.length - 1;
if (length % 2 == 1) {
length--;
}
StringBuffer buffer = new StringBuffer(revision.length());
for (int i = 0; i < length; i++) {
buffer.append(Integer.toString(digits[i]));
if (i < length - 1) {
buffer.append('.');
}
}
return buffer.toString();
}
/**
* Remove any entries for the remote resources
* @param resource the remote resource
*/
public synchronized void clearEntries(ICVSRemoteResource resource) {
String remotePath = getFullPath(resource);
LogEntry[] entries = (LogEntry[])allEntries.remove(remotePath);
if (entries != null) {
for (int i = 0; i < entries.length; i++) {
LogEntry entry = entries[i];
this.entries.remove(entry.getRemoteFile());
}
}
}
}
public RemoteLogOperation(IWorkbenchPart part, ICVSRemoteResource[] remoteResources, CVSTag tag1, CVSTag tag2, LogEntryCache cache) {
super(part, remoteResources);
this.tag1 = tag1;
this.tag2 = tag2;
this.entryCache = cache;
}
/* (non-Javadoc)
* @see org.eclipse.team.internal.ccvs.ui.operations.RepositoryLocationOperation#execute(org.eclipse.team.internal.ccvs.core.ICVSRepositoryLocation, org.eclipse.team.internal.ccvs.core.ICVSRemoteResource[], org.eclipse.core.runtime.IProgressMonitor)
*/
protected void execute(ICVSRepositoryLocation location, ICVSRemoteResource[] remoteResources, IProgressMonitor monitor) throws CVSException {
monitor.beginTask(Policy.bind("RemoteLogOperation.0", location.getHost()), 100); //$NON-NLS-1$
Session s = new Session(location, CVSWorkspaceRoot.getCVSFolderFor(ResourcesPlugin.getWorkspace().getRoot()), false /* do not output to console */);
LogListener listener = new LogListener();
ICVSRemoteResource[] remotes = remoteResources;
Command.LocalOption[] localOptions;
if(tag1 != null && tag2 != null) {
localOptions = new Command.LocalOption[] {RLog.NO_TAGS, RLog.makeTagOption(tag1, tag2)};
} else {
localOptions = new Command.LocalOption[] {RLog.NO_TAGS};
// Optimize the cases were we are only fetching the history for a single revision. If it is
// already cached, don't fetch it again.
ArrayList unCachedRemotes = new ArrayList();
for (int i = 0; i < remoteResources.length; i++) {
ICVSRemoteResource r = remoteResources[i];
if(entryCache.getLogEntry(r) == null) {
unCachedRemotes.add(r);
}
}
remotes = (ICVSRemoteResource[]) unCachedRemotes.toArray(new ICVSRemoteResource[unCachedRemotes.size()]);
}
if (remotes.length > 0) {
try {
s.open(Policy.subMonitorFor(monitor, 10));
IStatus status = rlog.execute(s, Command.NO_GLOBAL_OPTIONS, localOptions, remotes, listener, Policy.subMonitorFor(monitor, 90));
collectStatus(status);
} finally {
s.close();
}
entryCache.cacheEntries(remotes, listener);
}
}
/* (non-Javadoc)
* @see org.eclipse.team.internal.ccvs.ui.operations.CVSOperation#getTaskName()
*/
protected String getTaskName() {
return Policy.bind("RemoteLogOperation.1"); //$NON-NLS-1$
}
}
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