RolloverDescriptionPtr FixedWindowRollingPolicy::rollover()

in src/main/cpp/fixedwindowrollingpolicy.cpp [160:229]
59 lines of code
7 McCabe index (conditional complexity)

RolloverDescriptionPtr FixedWindowRollingPolicy::rollover(
	const   LogString&  currentActiveFile,
	const   bool        append,
	Pool&       pool)
{
	RolloverDescriptionPtr desc;

	if (priv->maxIndex < 0)
	{
		return desc;
	}

	int purgeStart = priv->minIndex;

	if (!priv->explicitActiveFile)
	{
		purgeStart++;
	}

	if (!purge(purgeStart, priv->maxIndex, pool))
	{
		return desc;
	}

	LogString buf;
	ObjectPtr obj = std::make_shared<Integer>(purgeStart);
	formatFileName(obj, buf, pool);

	LogString renameTo(buf);
	LogString compressedName(renameTo);
	ActionPtr compressAction ;

	if(getCreateIntermediateDirectories()){
		File compressedFile(compressedName);
		File compressedParent (compressedFile.getParent(pool));
		compressedParent.mkdirs(pool);
	}

	if (StringHelper::endsWith(renameTo, LOG4CXX_STR(".gz")))
	{
		renameTo.resize(renameTo.size() - 3);
		GZCompressActionPtr comp = std::make_shared<GZCompressAction>(
					File().setPath(renameTo),
					File().setPath(compressedName),
					true);
		comp->setThrowIOExceptionOnForkFailure(priv->throwIOExceptionOnForkFailure);
		compressAction = comp;
	}
	else if (StringHelper::endsWith(renameTo, LOG4CXX_STR(".zip")))
	{
		renameTo.resize(renameTo.size() - 4);
		ZipCompressActionPtr comp = std::make_shared<ZipCompressAction>(
					File().setPath(renameTo),
					File().setPath(compressedName),
					true);
		comp->setThrowIOExceptionOnForkFailure(priv->throwIOExceptionOnForkFailure);
		compressAction = comp;
	}

	auto renameAction = std::make_shared<FileRenameAction>(
				File().setPath(currentActiveFile),
				File().setPath(renameTo),
				false);

	desc = std::make_shared<RolloverDescription>(
				currentActiveFile,  append,
				renameAction,       compressAction);

	return desc;
}