Class BlobInfo (2.21.0) 

public class BlobInfo implements Serializable

Information about an object in Google Cloud Storage. A BlobInfo object includes the BlobId instance and the set of properties, such as the blob's access control configuration, user provided metadata, the CRC32C checksum, etc. Instances of this class are used to create a new object in Google Cloud Storage or update the properties of an existing object. To deal with existing Storage objects the API includes the Blob class which extends BlobInfo and declares methods to perform operations on the object. Neither BlobInfo nor Blob instances keep the object content, just the object properties.

Example of usage BlobInfo to create an object in Google Cloud Storage:


 BlobId blobId = BlobId.of(bucketName, blobName);
 BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("text/plain").build();
 Blob blob = storage.create(blobInfo, "Hello, world".getBytes(StandardCharsets.UTF_8));

See Also: Concepts and Terminology

Inheritance

Object > BlobInfo

Implements

Serializable

Static Methods

newBuilder(BlobId blobId)

public static BlobInfo.Builder newBuilder(BlobId blobId)

Returns a BlobInfo builder where blob identity is set using the provided value.

Parameter
Name Description
blobId BlobId
Returns
Type Description
BlobInfo.Builder

newBuilder(BucketInfo bucketInfo, String name)

public static BlobInfo.Builder newBuilder(BucketInfo bucketInfo, String name)

Returns a BlobInfo builder where blob identity is set using the provided values.

Parameters
Name Description
bucketInfo BucketInfo
name String
Returns
Type Description
BlobInfo.Builder

newBuilder(BucketInfo bucketInfo, String name, Long generation)

public static BlobInfo.Builder newBuilder(BucketInfo bucketInfo, String name, Long generation)

Returns a BlobInfo builder where blob identity is set using the provided values.

Parameters
Name Description
bucketInfo BucketInfo
name String
generation Long
Returns
Type Description
BlobInfo.Builder

newBuilder(String bucket, String name)

public static BlobInfo.Builder newBuilder(String bucket, String name)

Returns a BlobInfo builder where blob identity is set using the provided values.

Parameters
Name Description
bucket String
name String
Returns
Type Description
BlobInfo.Builder

newBuilder(String bucket, String name, Long generation)

public static BlobInfo.Builder newBuilder(String bucket, String name, Long generation)

Returns a BlobInfo builder where blob identity is set using the provided values.

Parameters
Name Description
bucket String
name String
generation Long
Returns
Type Description
BlobInfo.Builder

Methods

equals(Object o)

public boolean equals(Object o)
Parameter
Name Description
o Object
Returns
Type Description
boolean
Overrides

getAcl()

public List<Acl> getAcl()

Returns the blob's access control configuration. See Also: About Access Control Lists

Returns
Type Description
List<Acl>

getBlobId()

public BlobId getBlobId()

Returns the blob's identity.

Returns
Type Description
BlobId

getBucket()

public String getBucket()

Returns the name of the containing bucket.

Returns
Type Description
String

getCacheControl()

public String getCacheControl()

Returns the blob's data cache control. See Also: Cache-Control

Returns
Type Description
String

getComponentCount()

public Integer getComponentCount()

Returns the number of components that make up this blob. Components are accumulated through the Storage#compose(Storage.ComposeRequest) operation and are limited to a count of 1024, counting 1 for each non-composite component blob and componentCount for each composite component blob. This value is set only for composite blobs. See Also: Component Count Property

Returns
Type Description
Integer

getContentDisposition()

public String getContentDisposition()

Returns the blob's data content disposition. See Also: Content-Disposition

Returns
Type Description
String

getContentEncoding()

public String getContentEncoding()

Returns the blob's data content encoding. See Also: Content-Encoding

Returns
Type Description
String

getContentLanguage()

public String getContentLanguage()

Returns the blob's data content language. See Also: Content-Language

Returns
Type Description
String

getContentType()

public String getContentType()

Returns the blob's data content type. See Also: Content-Type

Returns
Type Description
String

getCrc32c()

public String getCrc32c()

Returns the CRC32C checksum of blob's data as described in RFC 4960, Appendix B; encoded in base64 in big-endian order. See Also: Hashes and ETags: Best Practices

Returns
Type Description
String

getCrc32cToHexString()

public String getCrc32cToHexString()

Returns the CRC32C checksum of blob's data as described in RFC 4960, Appendix B; decoded to string. See Also: Hashes and ETags: Best Practices

Returns
Type Description
String

getCreateTime() (deprecated)

public Long getCreateTime()

Deprecated. Use #getCreateTimeOffsetDateTime()

Returns the creation time of the blob expressed as the number of milliseconds since the Unix epoch.

Returns
Type Description
Long

getCreateTimeOffsetDateTime()

public OffsetDateTime getCreateTimeOffsetDateTime()

Returns the creation time of the blob.

Returns
Type Description
OffsetDateTime

getCustomTime() (deprecated)

public Long getCustomTime()

Deprecated. Use #getCustomTimeOffsetDateTime()

Returns the custom time specified by the user for an object.

Returns
Type Description
Long

getCustomTimeOffsetDateTime()

public OffsetDateTime getCustomTimeOffsetDateTime()

Returns the custom time specified by the user for an object.

Returns
Type Description
OffsetDateTime

getCustomerEncryption()

public BlobInfo.CustomerEncryption getCustomerEncryption()

Returns information on the customer-supplied encryption key, if the blob is encrypted using such a key.

Returns
Type Description
BlobInfo.CustomerEncryption

getDeleteTime() (deprecated)

public Long getDeleteTime()

Deprecated. Use #getDeleteTimeOffsetDateTime()

Returns the deletion time of the blob expressed as the number of milliseconds since the Unix epoch.

Returns
Type Description
Long

getDeleteTimeOffsetDateTime()

public OffsetDateTime getDeleteTimeOffsetDateTime()

Returns the deletion time of the blob.

Returns
Type Description
OffsetDateTime

getEtag()

public String getEtag()

Returns HTTP 1.1 Entity tag for the blob. See Also: Entity Tags

Returns
Type Description
String

getEventBasedHold()

public Boolean getEventBasedHold()

Returns a Boolean with either true, null and in certain cases false.

Case 1: true the field com.google.cloud.storage.Storage.BlobField#EVENT_BASED_HOLD is selected in a Storage#get(BlobId, Storage.BlobGetOption...) and event-based hold for the blob is enabled.

Case 2.1: null the field com.google.cloud.storage.Storage.BlobField#EVENT_BASED_HOLD is selected in a Storage#get(BlobId, Storage.BlobGetOption...), but event-based hold for the blob is not enabled. This case can be considered implicitly false.

Case 2.2: null the field com.google.cloud.storage.Storage.BlobField#EVENT_BASED_HOLD is not selected in a Storage#get(BlobId, Storage.BlobGetOption...), and the state for this field is unknown.

Case 3: false event-based hold is explicitly set to false using in a Builder#setEventBasedHold(Boolean) client side for a follow-up request e.g. Storage#update(BlobInfo, Storage.BlobTargetOption...) in which case the value of event-based hold will remain false for the given instance.

Returns
Type Description
Boolean

getGeneratedId()

public String getGeneratedId()

Returns the service-generated for the blob.

Returns
Type Description
String

getGeneration()

public Long getGeneration()

Returns blob's data generation. Used for blob versioning.

Returns
Type Description
Long

getKmsKeyName()

public String getKmsKeyName()

Returns the Cloud KMS key used to encrypt the blob, if any.

Returns
Type Description
String

getMd5()

public String getMd5()

Returns the MD5 hash of blob's data encoded in base64. See Also: Hashes and ETags: Best Practices

Returns
Type Description
String

getMd5ToHexString()

public String getMd5ToHexString()

Returns the MD5 hash of blob's data decoded to string. See Also: Hashes and ETags: Best Practices

Returns
Type Description
String

getMediaLink()

public String getMediaLink()

Returns the blob's media download link.

Returns
Type Description
String

getMetadata()

public @Nullable Map<@NonNull String,@Nullable String> getMetadata()

Returns blob's user provided metadata.

Returns
Type Description
@org.checkerframework.checker.nullness.qual.Nullable java.util.Map<@org.checkerframework.checker.nullness.qual.NonNull java.lang.String,@org.checkerframework.checker.nullness.qual.Nullable java.lang.String>

getMetageneration()

public Long getMetageneration()

Returns blob's metageneration. Used for preconditions and for detecting changes in metadata. A metageneration number is only meaningful in the context of a particular generation of a particular blob.

Returns
Type Description
Long

getName()

public String getName()

Returns the blob's name.

Returns
Type Description
String

getOwner()

public Acl.Entity getOwner()

Returns the blob's owner. This will always be the uploader of the blob.

Returns
Type Description
Acl.Entity

getRetentionExpirationTime() (deprecated)

public Long getRetentionExpirationTime()

Deprecated. Use #getRetentionExpirationTimeOffsetDateTime()

Returns the retention expiration time of the blob as Long, if a retention period is defined. If retention period is not defined this value returns null

Returns
Type Description
Long

getRetentionExpirationTimeOffsetDateTime()

public OffsetDateTime getRetentionExpirationTimeOffsetDateTime()

Returns the retention expiration time of the blob, if a retention period is defined. If retention period is not defined this value returns null

Returns
Type Description
OffsetDateTime

getSelfLink()

public String getSelfLink()

Returns the URI of this blob as a string.

Returns
Type Description
String

getSize()

public Long getSize()

Returns the content length of the data in bytes. See Also: Content-Length

Returns
Type Description
Long

getStorageClass()

public StorageClass getStorageClass()

Returns the storage class of the blob.

Returns
Type Description
StorageClass

getTemporaryHold()

public Boolean getTemporaryHold()

Returns a Boolean with either true, null and in certain cases false.

Case 1: true the field com.google.cloud.storage.Storage.BlobField#TEMPORARY_HOLD is selected in a Storage#get(BlobId, Storage.BlobGetOption...) and temporary hold for the blob is enabled.

Case 2.1: null the field com.google.cloud.storage.Storage.BlobField#TEMPORARY_HOLD is selected in a Storage#get(BlobId, Storage.BlobGetOption...), but temporary hold for the blob is not enabled. This case can be considered implicitly false.

Case 2.2: null the field com.google.cloud.storage.Storage.BlobField#TEMPORARY_HOLD is not selected in a Storage#get(BlobId, Storage.BlobGetOption...), and the state for this field is unknown.

Case 3: false event-based hold is explicitly set to false using in a Builder#setEventBasedHold(Boolean) client side for a follow-up request e.g. Storage#update(BlobInfo, Storage.BlobTargetOption...) in which case the value of temporary hold will remain false for the given instance.

Returns
Type Description
Boolean

getTimeStorageClassUpdated() (deprecated)

public Long getTimeStorageClassUpdated()

Deprecated. Use #getTimeStorageClassUpdatedOffsetDateTime()

Returns the time that the object's storage class was last changed or the time of the object creation.

Returns
Type Description
Long

getTimeStorageClassUpdatedOffsetDateTime()

public OffsetDateTime getTimeStorageClassUpdatedOffsetDateTime()

Returns the time that the object's storage class was last changed or the time of the object creation.

Returns
Type Description
OffsetDateTime

getUpdateTime() (deprecated)

public Long getUpdateTime()

Deprecated. Use #getUpdateTimeOffsetDateTime()

Returns the last modification time of the blob's metadata expressed as the number of milliseconds since the Unix epoch.

Returns
Type Description
Long

getUpdateTimeOffsetDateTime()

public OffsetDateTime getUpdateTimeOffsetDateTime()

Returns the last modification time of the blob's metadata.

Returns
Type Description
OffsetDateTime

hashCode()

public int hashCode()
Returns
Type Description
int
Overrides

isDirectory()

public boolean isDirectory()

Returns true if the current blob represents a directory. This can only happen if the blob is returned by Storage#list(String, Storage.BlobListOption...) when the Storage.BlobListOption#currentDirectory() option is used. When this is the case only #getBlobId() and #getSize() are set for the current blob: BlobId#getName() ends with the '/' character, BlobId#getGeneration() returns null and #getSize() is 0.

Returns
Type Description
boolean

toBuilder()

public BlobInfo.Builder toBuilder()

Returns a builder for the current blob.

Returns
Type Description
BlobInfo.Builder

toString()

public String toString()
Returns
Type Description
String
Overrides