Package convex.core.data

Class Address

java.lang.Object

convex.core.data.AObject

convex.core.data.ACell

convex.core.data.ACountable<CVMByte>

convex.core.data.ABlob

convex.core.data.ALongBlob

convex.core.data.Address

All Implemented Interfaces:

IValidated, IWriteable, Comparable<ABlob>

public final class Address
extends ALongBlob

Immutable class representing an Address, generally used to uniquely identify an Account. An Address is a specialised 8-byte long blob instance that wraps a non-negative long Account number. This number serves as an index into the vector of accounts for the current state.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	MAX_ENCODING_LENGTH
static final Address	ZERO	The Zero Address

Fields inherited from class convex.core.data.ALongBlob

HEX_LENGTH, LENGTH, value

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

Method Summary

Modifier and Type	Method	Description
static Address	create(long number)	Creates an Address from a blob.
static Address	create(ABlob b)	Creates an Address from a blob.
int	encode(byte[] bs, int pos)	Writes this Cell's encoding to a byte array, including a tag byte which will be written first.
int	encodeRaw(byte[] bs, int pos)	Writes this Blob's encoding to a byte array, excluding the tag byte
boolean	equals(ABlob o)	Determines if this Blob is equal to another Blob.
boolean	equals(Address o)
boolean	equalsBytes(byte[] bytes, int byteOffset)	Tests if this Blob is equal to a subset of a byte array
int	estimatedEncodingSize()	Estimate the encoded data size for this Cell.
static Address	fromHex(String hexString)	Constructs an Address object from a hex string
void	getBytes(byte[] dest, int destOffset)	Copies the bytes from this blob to a given destination
byte	getTag()	Gets the tag byte for this cell.
AType	getType()	Gets the most specific known runtime Type for this Cell.
int	hashCode()	Gets the Java hashCode for this cell.
boolean	isCanonical()	Returns true if this Cell is in a canonical representation for message writing.
boolean	isRegularBlob()	Returns true if this object is a regular blob (i.e.
long	longValue()	Gets the long value of this Blob if the length is exactly 8 bytes, otherwise throws an Exception
Address	offset(long offset)	Creates a new Address at an offset to this Address
static Address	parse(Object o)	Attempts to parse an address from an arbitrary object.
static Address	parse(String s)	Constructs an Address from an arbitrary String, attempting to parse different possible formats
boolean	print(BlobBuilder sb, long limit)	Prints this Blob in a readable Hex representation, typically in the format "0x01abcd...." Subclasses may override this if they require a different representation.
static Address	readRaw(ByteBuffer bb)
Blob	slice(long start, long end)	Gets a contiguous slice of this Blob, as a new Blob.
Address	toCanonical()	Converts this Cell to its canonical version.
AString	toCVMString(long limit)	Returns the CVM String representation of this Cell.
Blob	toFlatBlob()	Converts this object to a flat array-backed Blob instance.
protected void	updateDigest(MessageDigest digest)
void	validateCell()	Validates the local structure and invariants of this cell.

Methods inherited from class convex.core.data.ALongBlob

append, appendHex, byteAt, calcMemorySize, commonHexPrefixLength, compareTo, compareTo, count, createRef, equalsBytes, getByteBuffer, getChunk, getHexDigit, getRefCount, getUnchecked, hexMatchLength, isEmbedded, toLong, writeToBuffer, writeToBuffer

Methods inherited from class convex.core.data.ABlob

computeHash, empty, encodeRawData, equals, get, getBytes, getContentHash, getElementRef, hexEquals, hexEquals, hexLength, isCVMValue, slice, toByteBuffer, toHexString, toHexString, validate

Methods inherited from class convex.core.data.ACountable

isEmpty, size

Methods inherited from class convex.core.data.ACell

announce, announce, attachMemorySize, attachRef, cachedEncoding, cachedHash, createAnnounced, createEncoding, createPersisted, createPersisted, equals, getCanonical, getChildRefs, getEncoding, getEncodingLength, getHash, getMemorySize, getRef, getRef, isCompletelyEncoded, mark, mark, toString, updateRefs, write

Methods inherited from class convex.core.data.AObject

attachEncoding, print, print

Methods inherited from class java.lang.Object

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

Field Details

ZERO

public static final Address ZERO

The Zero Address

MAX_ENCODING_LENGTH

public static final int MAX_ENCODING_LENGTH

See Also:

• Constant Field Values

Method Details

create

public static Address create(long number)

Creates an Address from a blob. Number be a valid non-negative long value.

Parameters:

number - Account number

Returns:

Address instance, or null if not valid

create

public static Address create(ABlob b)

Creates an Address from a blob. Must be a valid long value

Parameters:

b - Blob to convert to an Address

Returns:

Address instance, or null if not valid

getType

public AType getType()

Description copied from class: ACell

Gets the most specific known runtime Type for this Cell.

Overrides:

getType in class ABlob

Returns:

The Type of this Call

hashCode

public int hashCode()

Description copied from class: ACell

Gets the Java hashCode for this cell. Must be consistent with equals. Default is the first bytes (big-endian) of the Cell Encoding's hash, since this is consistent with encoding-based equality. However, different Types may provide more efficient hashcodes provided that the usual invariants are preserved

Overrides:

hashCode in class ABlob

Returns:

integer hash code.

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 ALongBlob

Parameters:

o - Blob to compare with

Returns:

true if Blobs are equal, false otherwise

equals

public boolean equals(Address o)

fromHex

public static Address fromHex(String hexString)

Constructs an Address object from a hex string

Parameters:

hexString - String to read Address from

Returns:

An Address constructed from the hex string, or null if not a valid hex string

parse

public static Address parse(String s)

Constructs an Address from an arbitrary String, attempting to parse different possible formats

Parameters:

s - String to parse

Returns:

Address parsed, or null if not valid

parse

public static Address parse(Object o)

Attempts to parse an address from an arbitrary object. Accepts strings and numbers on a best efforts basis.

Parameters:

o - Object to parse as an Address

Returns:

Address parsed, or null if not valid

readRaw

public static Address readRaw(ByteBuffer bb)
                       throws BadFormatException

Throws:

BadFormatException

encode

public int encode(byte[] bs,
 int pos)

Description copied from class: ACell

Writes this Cell's encoding to a byte array, including a tag byte which will be written first. Cell must be canonical, or else an error may occur.

Specified by:

encode in interface IWriteable

Specified by:

encode 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

print

public boolean print(BlobBuilder sb,
 long limit)

Description copied from class: ABlob

Prints this Blob in a readable Hex representation, typically in the format "0x01abcd...." Subclasses may override this if they require a different representation.

Overrides:

print in class ABlob

Parameters:

sb - BlobBuilder to append to

limit - Limit of printing in string bytes

Returns:

True if fully printed within limit, false otherwise

toCVMString

public AString toCVMString(long limit)

Description copied from class: ACell

Returns the CVM String representation of this Cell. Normally, this is as printed, but may be different for some types. MUST return null in O(1) time if the length of the CVM String would exceed limit. The String representation is intended to be a easy-to-read textual representation of the Cell's data content.

Overrides:

toCVMString in class ACell

Parameters:

limit - Limit of CVM String length in UTF-8 bytes

Returns:

CVM String, or null if limit exceeded

isCanonical

public boolean isCanonical()

Description copied from class: ACell

Returns true if this Cell is in a canonical representation for message writing. Non-canonical objects may be used on a temporary internal basis, they must always be converted to canonical representations for external use (e.g. Encoding).

Overrides:

isCanonical in class ALongBlob

Returns:

true if the object is in canonical format, false otherwise

estimatedEncodingSize

public int estimatedEncodingSize()

Description copied from interface: IWriteable

Estimate the encoded data size for this Cell. Used for quickly sizing buffers. Implementations should try to return a size that is likely to contain the entire object when represented in binary format, including the tag byte.

Returns:

The estimated size for the binary representation of this object.

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

isRegularBlob

public boolean isRegularBlob()

Description copied from class: ABlob

Returns true if this object is a regular blob (i.e. not a special blob type like Address)

Overrides:

isRegularBlob in class ABlob

Returns:

True if a regular blob

getBytes

public 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

slice

public Blob 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 ALongBlob

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.

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 ALongBlob

Returns:

A Blob instance containing the same data as this Blob.

updateDigest

protected void updateDigest(MessageDigest digest)

Specified by:

updateDigest in class ABlob

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

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

Overrides:

longValue in class ALongBlob

Returns:

The long value represented by the Blob

encodeRaw

public int encodeRaw(byte[] bs,
 int pos)

Description copied from class: ABlob

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

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

getTag

public byte getTag()

Description copied from class: ACell

Gets the tag byte for this cell. The tag byte is always written as the first byte of the Cell's Encoding

Specified by:

getTag in class ALongBlob

Returns:

Tag byte for this Cell

toCanonical

public Address toCanonical()

Description copied from class: ACell

Converts this Cell to its canonical version. Returns this Cell if already canonical, may be O(n) in size of value otherwise.

Specified by:

toCanonical in class ABlob

Returns:

Canonical version of Cell

offset

public Address offset(long offset)

Creates a new Address at an offset to this Address

Parameters:

offset - Offset to add to this Address (may be negative)

Returns:

New Address