Source:
<code>public synchronized RepositoryDTO fetchInstallableApplications() { LOGGER.info(String.format("Begin fetching process of git-repository '%s' in '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); boolean folderExists = gitRepositoryLocation.exists(); if (!folderExists) { LOGGER.info(String.format("Creating new folder '%s' for git-repository '%s'", gitRepositoryLocation.getAbsolutePath(), this.gitRepositoryUri)); if (!gitRepositoryLocation.mkdirs()) { LOGGER.error(String.format("Couldn't create folder for git repository '%s' at '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); <START> return null; <END> } } RepositoryDTO result = null; try { Git gitRepository = null; if (!folderExists) { LOGGER.info(String.format("Cloning git-repository '%s' to '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); gitRepository = Git.cloneRepository().setURI(this.gitRepositoryUri.toString()) .setDirectory(gitRepositoryLocation).call(); } else { LOGGER.info(String.format("Opening git-repository '%s' at '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); gitRepository = Git.open(gitRepositoryLocation); LOGGER.info(String.format("Pulling new commits from git-repository '%s' to '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); gitRepository.pull().call(); } gitRepository.close(); result = localRepositoryFactory.createInstance(this.gitRepositoryLocation, this.gitRepositoryUri) .fetchInstallableApplications(); } catch (RepositoryNotFoundException | GitAPIException e) { LOGGER.error(String.format("Folder '%s' is no git-repository", gitRepositoryLocation.getAbsolutePath()), e); } catch (IOException e) { LOGGER.error(String.format("An unknown error occured", e)); } return result; }</code><technical_language>Please return empty RepositoryDTO</technical_language>

Target:
public synchronized RepositoryDTO fetchInstallableApplications() { LOGGER.info(String.format("Begin fetching process of git-repository '%s' in '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); boolean folderExists = gitRepositoryLocation.exists(); if (!folderExists) { LOGGER.info(String.format("Creating new folder '%s' for git-repository '%s'", gitRepositoryLocation.getAbsolutePath(), this.gitRepositoryUri)); if (!gitRepositoryLocation.mkdirs()) { LOGGER.error(String.format("Couldn't create folder for git repository '%s' at '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); return new RepositoryDTO.Builder().build(); } } RepositoryDTO result = null; try { Git gitRepository = null; if (!folderExists) { LOGGER.info(String.format("Cloning git-repository '%s' to '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); gitRepository = Git.cloneRepository().setURI(this.gitRepositoryUri.toString()) .setDirectory(gitRepositoryLocation).call(); } else { LOGGER.info(String.format("Opening git-repository '%s' at '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); gitRepository = Git.open(gitRepositoryLocation); LOGGER.info(String.format("Pulling new commits from git-repository '%s' to '%s'", this.gitRepositoryUri, gitRepositoryLocation.getAbsolutePath())); gitRepository.pull().call(); } gitRepository.close(); result = localRepositoryFactory.createInstance(this.gitRepositoryLocation, this.gitRepositoryUri) .fetchInstallableApplications(); } catch (RepositoryNotFoundException | GitAPIException e) { LOGGER.error(String.format("Folder '%s' is no git-repository", gitRepositoryLocation.getAbsolutePath()), e); } catch (IOException e) { LOGGER.error(String.format("An unknown error occured", e)); } return result; }