/**
* Returns a list of versions starting from source and ending with target. This method returns the
* version always in an ascanding order. So if you need it ordered differently you have to reverse
* the list.
*
* @param projectId project id
* @param source source
* @param target target
* @return list of versions
* @throws ESException if source or target are out of range or any other problem occurs
*/
protected List<Version> getVersions(
ProjectId projectId, PrimaryVersionSpec source, PrimaryVersionSpec target)
throws ESException {
if (source.compareTo(target) < 1) {
final ProjectHistory projectHistory =
getSubInterface(ProjectSubInterfaceImpl.class).getProject(projectId);
final Version sourceVersion = getVersion(projectHistory, source);
final Version targetVersion = getVersion(projectHistory, target);
if (sourceVersion == null || targetVersion == null) {
throw new InvalidVersionSpecException(Messages.VersionSubInterfaceImpl_NoSourceNorTarget);
}
final List<Version> result = new ArrayList<Version>();
// since the introduction of branches the versions are collected
// in different order.
Version currentVersion = targetVersion;
while (currentVersion != null) {
result.add(currentVersion);
if (currentVersion.equals(sourceVersion)) {
break;
}
if (currentVersion.getPrimarySpec().compareTo(sourceVersion.getPrimarySpec()) < 0) {
// walked too far, invalid path.
throw new InvalidVersionSpecException(Messages.VersionSubInterfaceImpl_InvalidPath);
}
// Shortcut for most common merge usecase: If you have 2
// parallel branches and merge several times
// from the one branch into the another.
if (currentVersion.getMergedFromVersion().contains(sourceVersion)) {
// add sourceVersion because #getChanges always removes
// the first version
result.add(sourceVersion);
break;
}
currentVersion = findNextVersion(currentVersion);
}
// versions are collected in descending order, so the result has to be reversed.
Collections.reverse(result);
return result;
}
return getVersions(projectId, target, source);
}
private PrimaryVersionSpec resolveAncestorVersionSpec(
ProjectHistory projectHistory, AncestorVersionSpec versionSpec)
throws InvalidVersionSpecException {
Version currentSource = getVersion(projectHistory, versionSpec.getSource());
Version currentTarget = getVersion(projectHistory, versionSpec.getTarget());
if (currentSource == null || currentTarget == null) {
throw new InvalidVersionSpecException(
Messages.VersionSubInterfaceImpl_Invalid_Source_Or_Target);
}
// The goal is to find the common ancestor version of the source and
// target version from different branches. In
// order to find the ancestor the algorithm starts at the specified
// version and walks down the version tree in
// parallel for source and target until the current versions are equal
// and the ancestor is found. In Each step
// only one version (of target and source) is decremented. To find the
// global ancestor it is necessary that the
// version with the higher version number is decremented.
while (currentSource != null && currentTarget != null) {
if (currentSource == currentTarget) {
return currentSource.getPrimarySpec();
}
// Shortcut for most common merge usecase: If you have 2 parallel
// branches, only seperated by one level and merge several times from the one branch into the
// another.
// This case is also supported by #getVersions
if (currentSource.getMergedFromVersion().contains(currentTarget)) {
return currentTarget.getPrimarySpec();
}
if (currentSource.getPrimarySpec().getIdentifier()
>= currentTarget.getPrimarySpec().getIdentifier()) {
currentSource = findNextVersion(currentSource);
} else {
currentTarget = findNextVersion(currentTarget);
}
}
throw new InvalidVersionSpecException(Messages.VersionSubInterfaceImpl_NoAncestorFound);
}
private PrimaryVersionSpec internalCreateVersion(
ProjectId projectId,
PrimaryVersionSpec baseVersionSpec,
AbstractChangePackage changePackage,
BranchVersionSpec targetBranch,
PrimaryVersionSpec sourceVersion,
LogMessage logMessage,
final ACUser user)
throws ESException {
synchronized (getMonitor()) {
final long currentTimeMillis = System.currentTimeMillis();
final ProjectHistory projectHistory =
getSubInterface(ProjectSubInterfaceImpl.class).getProject(projectId);
// Find branch
final BranchInfo baseBranch = getBranchInfo(projectHistory, baseVersionSpec);
final Version baseVersion = getVersion(projectHistory, baseVersionSpec);
if (baseVersion == null || baseBranch == null) {
throw new InvalidVersionSpecException(
Messages.VersionSubInterfaceImpl_InvalidBranchOrVersion);
}
// defined here fore scoping reasons
Version newVersion = null;
BranchInfo newBranch = null;
// copy project and apply changes
final Project newProjectState =
((ProjectImpl) getSubInterface(ProjectSubInterfaceImpl.class).getProject(baseVersion))
.copy();
changePackage.apply(newProjectState);
// regular commit
if (isRegularCommit(targetBranch, baseVersion)) {
newVersion =
performRegularCommit(
baseVersionSpec,
logMessage,
user,
projectHistory,
baseBranch,
baseVersion,
newProjectState);
// case for new branch creation
} else if (isNewBranchCommit(targetBranch, projectHistory)) {
checkNewBranchCommitPreRequisites(targetBranch.getBranch());
// when branch does NOT exist, create new branch
newVersion = createVersion(projectHistory, newProjectState, logMessage, user, baseVersion);
newBranch =
createNewBranch(
projectHistory,
baseVersion.getPrimarySpec(),
newVersion.getPrimarySpec(),
targetBranch);
newVersion.setAncestorVersion(baseVersion);
} else {
// This point only can be reached with invalid input
throw new IllegalStateException(
Messages.VersionSubInterfaceImpl_TargetBranchCombination_Invalid);
}
if (sourceVersion != null) {
newVersion.getMergedFromVersion().add(getVersion(projectHistory, sourceVersion));
}
// try to save
try {
try {
trySave(projectId, changePackage, projectHistory, newVersion, newProjectState);
} catch (final FatalESException e) {
// try to roll back. removing version is necessary in all cases
rollback(projectHistory, baseBranch, baseVersion, newVersion, newBranch, e);
}
// if ancestor isn't null, a new branch was created. In this
// case we want to keep the old base project
// state
if (newVersion.getAncestorVersion() == null && baseVersion.getProjectState() != null) {
// delete projectstate from last revision depending on
// persistence policy
deleteOldProjectStateAccordingToOptions(projectId, baseVersion);
}
save(baseVersion);
save(projectHistory);
} catch (final FatalESException e) {
// roll back failed
EMFStoreController.getInstance().shutdown(e);
throw new ESException(Messages.VersionSubInterfaceImpl_ShuttingServerDown);
}
ModelUtil.logInfo(
Messages.VersionSubInterfaceImpl_TotalTimeForCommit
+ (System.currentTimeMillis() - currentTimeMillis));
return newVersion.getPrimarySpec();
}
}
