PackageService.java 文件源码

@Transactional
public Package downloadPackage(PackageMetadata packageMetadata) {
    Assert.notNull(packageMetadata, "Can't download PackageMetadata, it is a null value.");
    // Database contains the package file from a previous upload
    if (packageMetadata.getPackageFile() != null) {
        return deserializePackageFromDatabase(packageMetadata);
    }
    else {
        return downloadAndDeserializePackage(packageMetadata);
    }
}