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 Summary

Fields

Modifier and Type	Field	Description
protected int	length
protected int	offset
protected byte[]	store

Fields inherited from class convex.core.data.ABlob

contentHash

Fields inherited from class convex.core.data.ACell

cachedRef, EMPTY_ARRAY

Fields inherited from class convex.core.data.AObject

encoding

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AArrayBlob(byte[] bytes, int offset, int length)

Method Summary

Modifier and Type	Method	Description
ABlob	append(ABlob d)	Append an additional data object to this, creating a new data object.
byte	byteAt(long i)	Gets the byte at the specified position in this blob
long	commonHexPrefixLength(ABlob b)	Computes the length of the longest common hex prefix between two blobs
int	compareTo(AArrayBlob b)
int	compareTo(ABlob b)	Compares this blob to another blob, in lexographic order sorting by first bytes.
long	count()	Gets the length of this Blob
int	encodeRaw(byte[] bs, int pos)	Writes this Cell's encoding to a byte array, excluding the tag byte
boolean	equalsBytes(byte[] bytes, int byteOffset)	Tests if this Blob is equal to a subset of a byte array
boolean	equalsBytes(ABlob k)	Tests if this Blob has exactly the same bytes as another Blob
ByteBuffer	getByteBuffer()	Gets a byte buffer containing this Blob's data.
void	getBytes(byte[] dest, int destOffset)	Copies the bytes from this blob to a given destination
int	getHexDigit(long digitPos)	Gets the specified hex digit from this data object.
byte[]	getInternalArray()	Gets the internal array backing this Blob.
int	getInternalOffset()	Gets this offset into the internal array backing this Blob.
int	getRefCount()	Gets the number of Refs contained within this Cell.
byte	getUnchecked(long i)	Gets the byte at the specified position in this data object, without bounds checking.
boolean	hexMatches(ABlob key, int start, int end)	Tests if a specific range of hex digits are exactly equal.
long	hexMatchLength(ABlob b, long start, long length)	Returns the number of matching hex digits in the given hex range of another blob.
long	longValue()	Gets the long value of this Blob if the length is exactly 8 bytes, otherwise throws an Exception
boolean	rangeMatches(AArrayBlob b, int start, int end)	Tests if a specific range of bytes are exactly equal from this Blob with another Blob
boolean	rangeMatches(ABlob b, int start, int end)	Tests if a specific range of bytes are exactly equal.
Blob	slice(long start)	Gets a slice of this blob, as a new blob, starting from the given offset and extending to the end of the blob.
Blob	slice(long start, long length)	Gets a contiguous slice of this blob, as a new Blob.
Blob	toBlob()	Converts this object to a Blob instance
String	toHexString()	Converts this data object to a lowercase hex string representation
void	toHexString(StringBuilder sb)
long	toLong()	Converts this Blob to the corresponding long value.
void	updateDigest(MessageDigest digest)
void	validate()	Validates the complete structure of this object.
void	validateCell()	Validates the local structure and invariants of this cell.
int	writeToBuffer(byte[] bs, int pos)	Writes the raw byte contents of this blob to a byte array
ByteBuffer	writeToBuffer(ByteBuffer bb)	Writes the raw byte contents of this blob to a ByteBuffer.

Methods inherited from class convex.core.data.ABlob

computeHash, empty, equals, equals, get, getBytes, getChunk, getContentHash, getElementRef, getType, hashCode, hexEquals, hexEquals, hexLength, isRegularBlob, print, toByteBuffer, toCanonical, toHexString

Methods inherited from class convex.core.data.ACountable

isEmpty, size

Methods inherited from class convex.core.data.ACell

announce, announce, attachMemorySize, attachRef, cachedEncoding, cachedHash, calcMemorySize, createAnnounced, createEncoding, createPersisted, createPersisted, createRef, encode, equals, getChildRefs, getEncoding, getEncodingLength, getHash, getMemorySize, getRef, getRef, getTag, isCanonical, isCVMValue, isEmbedded, toString, updateRefs, write

Methods inherited from class convex.core.data.AObject

attachEncoding, print

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface convex.core.data.IWriteable

estimatedEncodingSize

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 Blob slice(long start,
 long length)

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

length - Length of the slice

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 data object to this, creating a new data object.

Specified by:

append in class ABlob

Parameters:

d - Blob to append

Returns:

A new blob, containing the additional data appended to this blob.

slice

public Blob slice(long start)

Description copied from class: ABlob

Gets a slice of this blob, as a new blob, starting from the given offset and extending to the end of the blob. Shares underlying backing data where possible. Returned Blob may not be the same type as the original Blob

Overrides:

slice in class ABlob

Parameters:

start - Start position to slice from

Returns:

Slice of Blob

toBlob

public Blob toBlob()

Description copied from class: ABlob

Converts this object to a Blob instance

Specified by:

toBlob 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 lexographic order sorting by first bytes. Note: This means that compareTo does not precisely match equality, because different 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.

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 int encodeRaw(byte[] bs,
 int pos)

Description copied from class: ACell

Writes this Cell's encoding to a byte array, excluding the tag byte

Specified by:

encodeRaw in class ACell

Parameters:

bs - A byte array to which to write the encoding

pos - The offset into the byte array

Returns:

New position after writing

toHexString

public final String toHexString()

Description copied from class: ABlob

Converts this data object to a lowercase hex string representation

Specified by:

toHexString in class ABlob

Returns:

Hex String representation

toHexString

public void toHexString(StringBuilder sb)

Specified by:

toHexString in class ABlob

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. Result is undefined if index is out of bounds.

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 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.

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 signed 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. Contained Refs may be either external or embedded.

Specified by:

getRefCount in class ACell

Returns:

The number of Refs in this Cell