private StoredObject createCombinedObjectSmall(CombinedStoredObject combinedObject) { ImmutableList.Builder<InputSupplier<InputStream>> builder = ImmutableList.builder(); List<URI> sourceParts = Lists.transform(combinedObject.getSourceParts(), StoredObject.GET_LOCATION_FUNCTION); for (URI sourcePart : sourceParts) { builder.add(getInputSupplier(sourcePart)); } InputSupplier<InputStream> source = ByteStreams.join(builder.build()); File tempFile = null; try { tempFile = File.createTempFile( S3StorageHelper.getS3FileName(combinedObject.getLocation()), ".small.s3.data"); Files.copy(source, tempFile); StoredObject result = putObject(combinedObject.getLocation(), tempFile); return result; } catch (IOException e) { throw Throwables.propagate(e); } finally { if (tempFile != null) { tempFile.delete(); } } }