Package convex.core.data

Class AArrayBlob

java.lang.Object
convex.core.data.AObject
convex.core.data.ACell
convex.core.data.ACountable<CVMByte>
convex.core.data.ABlob
convex.core.data.AArrayBlob
All Implemented Interfaces:
IValidated, IWriteable, Comparable<ABlob>
Direct Known Subclasses:
AccountKey, ANumericBlob, Blob, Hash
public abstract class AArrayBlob extends ABlob
Abstract base class for binary data stored in Java arrays.

  • Field Details

    • store

      protected final byte[] store

    • offset

      protected final int offset

    • length

      protected final int length

  • Constructor Details

    • AArrayBlob

      protected AArrayBlob​(byte[] bytes, int offset, int length)

  • Method Details

    • updateDigest

      public void updateDigest​(MessageDigest digest)
      Specified by:
      updateDigest in class ABlob

    • slice

      public AArrayBlob slice​(long start, long end)
      Description copied from class: ABlob
      Gets a contiguous slice of this Blob, as a new Blob. Shares underlying backing data where possible
      Specified by:
      slice in class ABlob
      Parameters:
      start - Start position for the created slice (inclusive)
      end - End of the slice (exclusive)
      Returns:
      A blob of the specified length, representing a slice of this blob.

    • append

      public ABlob append​(ABlob d)
      Description copied from class: ABlob
      Append an additional Blob to this, creating a new Blob as needed. New Blob will be canonical.
      Specified by:
      append in class ABlob
      Parameters:
      d - Blob to append
      Returns:
      A new Blob, containing the additional data appended to this blob.

    • appendSmall

      protected ABlob appendSmall​(ABlob d)

    • toFlatBlob

      public Blob toFlatBlob()
      Description copied from class: ABlob
      Converts this object to a flat array-backed Blob instance. Warning: might be O(n) in size of Blob, may not be canonical etc.
      Specified by:
      toFlatBlob in class ABlob
      Returns:
      A Blob instance containing the same data as this Blob.

    • compareTo

      public final int compareTo​(ABlob b)
      Description copied from class: ABlob
      Compares this Blob to another Blob, in lexicographic order sorting by first bytes (unsigned). Note: This means that compareTo does not precisely match equality, because specialised Blob types may be lexicographically equal but represent different values.
      Specified by:
      compareTo in interface Comparable<ABlob>
      Overrides:
      compareTo in class ABlob

    • compareTo

      public final int compareTo​(AArrayBlob b)

    • getBytes

      public final void getBytes​(byte[] dest, int destOffset)
      Description copied from class: ABlob
      Copies the bytes from this blob to a given destination
      Specified by:
      getBytes in class ABlob
      Parameters:
      dest - Destination array
      destOffset - Offset into destination array

    • writeToBuffer

      public ByteBuffer writeToBuffer​(ByteBuffer bb)
      Description copied from class: ABlob
      Writes the raw byte contents of this Blob to a ByteBuffer. May be big!
      Specified by:
      writeToBuffer in class ABlob
      Parameters:
      bb - ByteBuffer to write to
      Returns:
      The passed ByteBuffer, after writing byte content

    • writeToBuffer

      public int writeToBuffer​(byte[] bs, int pos)
      Description copied from class: ABlob
      Writes the raw byte contents of this blob to a byte array
      Specified by:
      writeToBuffer in class ABlob
      Parameters:
      bs - Byte array to write to
      pos - Starting position in byte array to write to
      Returns:
      The position in the array after writing

    • encodeRaw

      public final int encodeRaw​(byte[] bs, int pos)
      Encodes this Blob, excluding tag byte (will include count)
      Specified by:
      encodeRaw in class ABlob
      Parameters:
      bs - A byte array to which to write the encoding
      pos - The offset into the byte array
      Returns:
      New position after writing

    • encodeRawData

      public int encodeRawData​(byte[] bs, int pos)
      Encodes the raw data of this Blob. Assumes buffer has enough space for (length) bytes.
      Overrides:
      encodeRawData in class ABlob
      Parameters:
      bs - Byte array to write to
      pos - Position to write at
      Returns:
      Updates position

    • appendHex

      public final boolean appendHex​(BlobBuilder bb, long hexLength)
      Description copied from class: ABlob
      Append hex string up to the given length in hex digits (a multiple of two)
      Specified by:
      appendHex in class ABlob
      Parameters:
      bb - BlobBuilder instance to append to
      hexLength - Length in Hex digits to append
      Returns:
      true if Blob fully appended, false if more more hex digits remain

    • count

      public final long count()
      Description copied from class: ABlob
      Gets the length of this Blob
      Specified by:
      count in class ABlob
      Returns:
      The length in bytes of this data object

    • byteAt

      public final byte byteAt​(long i)
      Description copied from class: ABlob
      Gets the byte at the specified position in this blob
      Overrides:
      byteAt in class ABlob
      Parameters:
      i - Index of the byte to get
      Returns:
      The byte at the specified position

    • getUnchecked

      public final byte getUnchecked​(long i)
      Description copied from class: ABlob
      Gets the byte at the specified position in this data object, without bounds checking. Only safe if index is known to be in bounds, otherwise result is undefined.
      Specified by:
      getUnchecked in class ABlob
      Parameters:
      i - Index of the byte to get
      Returns:
      The byte at the specified position

    • getHexDigit

      public int getHexDigit​(long digitPos)
      Description copied from class: ABlob
      Gets the specified hex digit from this data object. WARNING: Result is undefined if index is out of bounds, but probably an IndexOutOfBoundsException.
      Overrides:
      getHexDigit in class ABlob
      Parameters:
      digitPos - The position of the hex digit
      Returns:
      The value of the hex digit, in the range 0-15 inclusive

    • getInternalArray

      public byte[] getInternalArray()
      Gets the internal array backing this Blob. Use with caution!
      Returns:
      Byte array backing this blob

    • getInternalOffset

      public int getInternalOffset()
      Gets this offset into the internal array backing this Blob.
      Returns:
      Offset into backing array

    • getByteBuffer

      public ByteBuffer getByteBuffer()
      Description copied from class: ABlob
      Gets a byte buffer containing this Blob's raw data. Will have remaining bytes equal to this Blob's size.
      Specified by:
      getByteBuffer in class ABlob
      Returns:
      A ByteBuffer containing the Blob's data.

    • equals

      public boolean equals​(ABlob o)
      Description copied from class: ABlob
      Determines if this Blob is equal to another Blob. Blobs are defined to be equal if they have the same on-chain representation, i.e. if and only if all of the following are true: - Blob is of the same general type - Blobs are of the same length - All byte values are equal
      Specified by:
      equals in class ABlob
      Parameters:
      o - Blob to compare with
      Returns:
      true if Blobs are equal, false otherwise

    • equalsBytes

      public boolean equalsBytes​(byte[] bytes, int byteOffset)
      Description copied from class: ABlob
      Tests if this Blob is equal to a subset of a byte array
      Specified by:
      equalsBytes in class ABlob
      Parameters:
      bytes - Byte array to compare with
      byteOffset - Offset into byte array
      Returns:
      true if exactly equal, false otherwise

    • equalsBytes

      public boolean equalsBytes​(ABlob k)
      Description copied from class: ABlob
      Tests if this Blob has exactly the same bytes as another Blob
      Specified by:
      equalsBytes in class ABlob
      Parameters:
      k - Blob to compare with
      Returns:
      True if byte content is exactly equal, false otherwise

    • rangeMatches

      public boolean rangeMatches​(ABlob b, int start, int end)
      Tests if a specific range of bytes are exactly equal.
      Parameters:
      b - Blob to compare with
      start - Start index of range (inclusive)
      end - End index of range (exclusive)
      Returns:
      true if digits are equal, false otherwise

    • rangeMatches

      public boolean rangeMatches​(AArrayBlob b, int start, int end)
      Tests if a specific range of bytes are exactly equal from this Blob with another Blob
      Parameters:
      b - Blob with which to compare
      start - Start index in both Blobs
      end - End index in both Blobs
      Returns:
      true if digits are equal, false otherwise

    • hexMatchLength

      public long hexMatchLength​(ABlob b, long start, long length)
      Description copied from class: ABlob
      Returns the number of matching hex digits in the given hex range of another Blob. Assumes range is valid for both blobs. Returns length if this Blob is exactly equal to the specified hex range.
      Specified by:
      hexMatchLength in class ABlob
      Parameters:
      b - Blob to compare with
      start - Start position (in hex digits)
      length - Length to compare (in hex digits)
      Returns:
      The number of matching hex characters

    • hexMatches

      public boolean hexMatches​(ABlob key, int start, int end)
      Tests if a specific range of hex digits are exactly equal.
      Parameters:
      key - Blob to compare with
      start - Start hex digit index (inclusive)
      end - End hex digit index (Exclusive)
      Returns:
      true if digits are equal, false otherwise

    • commonHexPrefixLength

      public long commonHexPrefixLength​(ABlob b)
      Description copied from class: ABlob
      Computes the length of the longest common hex prefix between two blobs
      Specified by:
      commonHexPrefixLength in class ABlob
      Parameters:
      b - Blob to compare with
      Returns:
      The length of the longest common prefix in hex digits

    • validate

      public void validate() throws InvalidDataException
      Description copied from interface: IValidated
      Validates the complete structure of this object. It is necessary to ensure all child Refs are validated, so the general contract for validate is:
      1. Call super.validate() - which will indirectly call validateCell()
      2. Call validate() on any contained cells in this class
      Specified by:
      validate in interface IValidated
      Overrides:
      validate in class ABlob
      Throws:
      InvalidDataException - If the data Valie is invalid in any way

    • validateCell

      public void validateCell() throws InvalidDataException
      Description copied from class: ACell
      Validates the local structure and invariants of this cell. Called by validate() super implementation. Should validate directly contained data, but should not validate all other structure of this cell. In particular, should not traverse potentially missing child Refs.
      Overrides:
      validateCell in class ABlob
      Throws:
      InvalidDataException - If the Cell is invalid

    • longValue

      public long longValue()
      Description copied from class: ABlob
      Gets the long value of this Blob if the length is exactly 8 bytes, otherwise throws an Exception
      Specified by:
      longValue in class ABlob
      Returns:
      The long value represented by the Blob

    • toLong

      public long toLong()
      Description copied from class: ABlob
      Converts this Blob to the corresponding long value. Assumes big-endian format, as if the entire blob is interpreted as a big integer. Higher bytes outside the Long range will be ignored.
      Specified by:
      toLong in class ABlob
      Returns:
      long value of this blob

    • getRefCount

      public int getRefCount()
      Description copied from class: ACell
      Gets the number of Refs contained within this Cell. This number is final / immutable for any given instance and is defined by the Cell encoding rules. Contained Refs may be either external or embedded.
      Specified by:
      getRefCount in class ACell
      Returns:
      The number of Refs in this Cell