Method to produce a BlobInfo to be used for the upload to Cloud Storage.
The bucket name in the returned BlobInfo MUST be equal to the value provided to the ParallelUploadConfig.Builder#setBucketName(String), if not that upload will fail with a
TransferStatus#FAILED_TO_START and a BucketNameMismatchException.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-16 UTC."],[],[],null,["# Interface ParallelUploadConfig.UploadBlobInfoFactory (2.55.0)\n\nVersion latestkeyboard_arrow_down\n\n- [2.55.0 (latest)](/java/docs/reference/google-cloud-storage/latest/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.54.0](/java/docs/reference/google-cloud-storage/2.54.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.53.3](/java/docs/reference/google-cloud-storage/2.53.3/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.52.3](/java/docs/reference/google-cloud-storage/2.52.3/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.50.0](/java/docs/reference/google-cloud-storage/2.50.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.49.0](/java/docs/reference/google-cloud-storage/2.49.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.48.2](/java/docs/reference/google-cloud-storage/2.48.2/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.47.0](/java/docs/reference/google-cloud-storage/2.47.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.46.0](/java/docs/reference/google-cloud-storage/2.46.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.45.0](/java/docs/reference/google-cloud-storage/2.45.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.44.1](/java/docs/reference/google-cloud-storage/2.44.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.43.2](/java/docs/reference/google-cloud-storage/2.43.2/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.42.0](/java/docs/reference/google-cloud-storage/2.42.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.41.0](/java/docs/reference/google-cloud-storage/2.41.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.40.1](/java/docs/reference/google-cloud-storage/2.40.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.39.0](/java/docs/reference/google-cloud-storage/2.39.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.38.0](/java/docs/reference/google-cloud-storage/2.38.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.37.0](/java/docs/reference/google-cloud-storage/2.37.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.36.1](/java/docs/reference/google-cloud-storage/2.36.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.34.0](/java/docs/reference/google-cloud-storage/2.34.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.33.0](/java/docs/reference/google-cloud-storage/2.33.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.32.1](/java/docs/reference/google-cloud-storage/2.32.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.30.1](/java/docs/reference/google-cloud-storage/2.30.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.29.1](/java/docs/reference/google-cloud-storage/2.29.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.28.0](/java/docs/reference/google-cloud-storage/2.28.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.27.1](/java/docs/reference/google-cloud-storage/2.27.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.24.0](/java/docs/reference/google-cloud-storage/2.24.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.23.0](/java/docs/reference/google-cloud-storage/2.23.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.22.6](/java/docs/reference/google-cloud-storage/2.22.6/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.21.0](/java/docs/reference/google-cloud-storage/2.21.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.20.2](/java/docs/reference/google-cloud-storage/2.20.2/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.19.0](/java/docs/reference/google-cloud-storage/2.19.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.18.0](/java/docs/reference/google-cloud-storage/2.18.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.17.2](/java/docs/reference/google-cloud-storage/2.17.2/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.16.0](/java/docs/reference/google-cloud-storage/2.16.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.15.1](/java/docs/reference/google-cloud-storage/2.15.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.14.0](/java/docs/reference/google-cloud-storage/2.14.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.13.1](/java/docs/reference/google-cloud-storage/2.13.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.12.0](/java/docs/reference/google-cloud-storage/2.12.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.11.3](/java/docs/reference/google-cloud-storage/2.11.3/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.10.0](/java/docs/reference/google-cloud-storage/2.10.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.9.3](/java/docs/reference/google-cloud-storage/2.9.3/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.8.1](/java/docs/reference/google-cloud-storage/2.8.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.7.1](/java/docs/reference/google-cloud-storage/2.7.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.6.1](/java/docs/reference/google-cloud-storage/2.6.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.5.1](/java/docs/reference/google-cloud-storage/2.5.1/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.4.5](/java/docs/reference/google-cloud-storage/2.4.5/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.3.0](/java/docs/reference/google-cloud-storage/2.3.0/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.2.3](/java/docs/reference/google-cloud-storage/2.2.3/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory)\n- [2.1.10](/java/docs/reference/google-cloud-storage/2.1.10/com.google.cloud.storage.transfermanager.ParallelUploadConfig.UploadBlobInfoFactory) \n\n public static interface ParallelUploadConfig.UploadBlobInfoFactory\n\nStatic Methods\n--------------\n\n### defaultInstance()\n\n public static ParallelUploadConfig.UploadBlobInfoFactory defaultInstance()\n\nThe default instance which applies not modification to the provided `fileName`\n\n### prefixObjectNames(String prefix)\n\n public static ParallelUploadConfig.UploadBlobInfoFactory prefixObjectNames(String prefix)\n\nAdapter factory to provide the same semantics as if using Builder#setPrefix(String)\n\n### transformFileName(Function\\\u003cString,String\\\u003e fileNameTransformer)\n\n public static ParallelUploadConfig.UploadBlobInfoFactory transformFileName(Function\u003cString,String\u003e fileNameTransformer)\n\nConvenience method to \"lift\" a [Function](https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html) that transforms the file name to an UploadBlobInfoFactory\n\nMethods\n-------\n\n### apply(String bucketName, String fileName)\n\n public abstract BlobInfo apply(String bucketName, String fileName)\n\nMethod to produce a [BlobInfo](/java/docs/reference/google-cloud-storage/latest/com.google.cloud.storage.BlobInfo) to be used for the upload to Cloud Storage.\n\nThe bucket name in the returned BlobInfo MUST be equal to the value provided to the ParallelUploadConfig.Builder#setBucketName(String), if not that upload will fail with a\n[TransferStatus#FAILED_TO_START](/java/docs/reference/google-cloud-storage/latest/com.google.cloud.storage.transfermanager.TransferStatus#com_google_cloud_storage_transfermanager_TransferStatus_FAILED_TO_START) and a [BucketNameMismatchException](/java/docs/reference/google-cloud-storage/latest/com.google.cloud.storage.transfermanager.BucketNameMismatchException)."]]
