Class SegmentBlob

  • All Implemented Interfaces:
    Blob

    public class SegmentBlob
    extends Object
    implements Blob
    A BLOB (stream of bytes). This is a record of type "VALUE".
    • Method Detail

      • getNewStream

        @NotNull
        public @NotNull InputStream getNewStream()
        Description copied from interface: Blob
        Returns a new stream for this blob. The streams returned from multiple calls to this method are byte wise equals. That is, subsequent calls to read return the same sequence of bytes as long as neither call throws an exception.
        Specified by:
        getNewStream in interface Blob
        Returns:
        a new stream for this blob
      • length

        public long length()
        Description copied from interface: Blob
        Returns the length of this blob or -1 if unknown.
        Specified by:
        length in interface Blob
        Returns:
        the length of this blob.
      • getReference

        @Nullable
        public @Nullable String getReference()
        Description copied from interface: Blob
        Returns a secure reference to this blob, or null if such a reference is not available.
        Specified by:
        getReference in interface Blob
        Returns:
        binary reference, or null
        See Also:
        OAK-834
      • getContentIdentity

        public String getContentIdentity()
        Description copied from interface: Blob
        A unique identifier of the content of this value. Usually this is a message digest of the content (a cryptographically secure one-way hash). This allows to avoid processing large binary values multiple times.

        This method returns null if the identifier is unknown. The identifier may not always be available, for example if the value has not yet been saved or processed. Once an identifier is available, it will never change because values are immutable.

        If two values have the same identifier, the content of the value is guaranteed to be the same. However it is not guaranteed that two values with the same content will return the same identifier.

        The identifier is opaque, meaning it can have any format and size.

        Specified by:
        getContentIdentity in interface Blob
        Returns:
        the unique identifier or null
      • isInlined

        public boolean isInlined()
        Description copied from interface: Blob
        Checks if the external blob is inlined in the id itself
        Specified by:
        isInlined in interface Blob
        Returns:
      • isExternal

        public boolean isExternal()
      • getBlobId

        @Nullable
        public @Nullable String getBlobId()
      • readBlobId

        @Nullable
        public static @Nullable String readBlobId​(@NotNull
                                                  @NotNull Segment segment,
                                                  int recordNumber)
      • readBlobId

        @Nullable
        public static @Nullable String readBlobId​(@NotNull
                                                  @NotNull Segment segment,
                                                  int recordNumber,
                                                  Map<SegmentId,​Segment> recoveredSegments)
      • equals

        public boolean equals​(Object object)
      • hashCode

        public int hashCode()
      • getSegment

        protected Segment getSegment()
        Returns the segment that contains this record.
        Returns:
        segment that contains this record
      • getRecordNumber

        protected int getRecordNumber()
      • getRecordId

        public RecordId getRecordId()
        Returns the identifier of this record.
        Returns:
        record identifier
      • getGcGeneration

        @NotNull
        public @NotNull GCGeneration getGcGeneration()
        Get the underlying segment's gc generation. Might cause the segment to get loaded if the generation info is missing
        Returns:
        the segment's gc generation