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java.lang.Objectorg.apache.jackrabbit.uuid.UUID
UUID
represents a Universally Unique Identifier per IETF
Draft specification. For more information regarding the IETF Draft UUID
specification
See: http://www.ietf.org/internet-drafts/draft-mealling-uuid-urn-01.txt
Copied from the Jakarta Commons-Id project
todo remove and use official commons-id release as soon as it is available
Field Summary |
Constructor Summary | |
UUID()
Constructs a nil UUID |
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UUID(byte[] byteArray)
Constructs a UUID from a 16 byte array. |
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UUID(DataInput input)
Constructs a UUID from a DataInput. |
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UUID(long mostSignificant,
long leastSignificant)
Constructs a UUID from two long values in most significant byte, and least significant bytes order. |
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UUID(String uuidString)
Constructs a UUID from a UUID formatted String. |
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UUID(UUID copyFrom)
Copy constructor. |
Method Summary | |
int |
clockSequence()
Returns the clock sequence value in the UUID. |
int |
compareTo(Object compareTo)
Compares two UUID's for equality |
boolean |
equals(Object obj)
Compares two UUID for equality. |
static UUID |
fromString(String uuidString)
Parses a string for a UUID. |
byte[] |
getRawBytes()
Returns a copy of the byte values contained in this UUID. |
int |
hashCode()
Returns a hash code value for the object. |
long |
node()
Returns the node identifier found in this UUID. |
static UUID |
randomUUID()
XXX begin modification by stefan@apache.org |
long |
timestamp()
Returns the timestamp value of the UUID as 100-nano second intervals since the Gregorian change offset (00:00:00.00, 15 October 1582 ). |
String |
toString()
Returns a string representation of the UUID. |
String |
toUrn()
Returns a urn representation of the UUID. |
int |
variant()
Returns the variant field of the UUID. |
int |
version()
Returns the version of the UUID. |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public UUID()
public UUID(UUID copyFrom)
Copy constructor.
copyFrom
- the UUID to copy to create this UUID.public UUID(byte[] byteArray) throws IllegalArgumentException
Constructs a UUID from a 16 byte array.
byteArray
- the 16 byte array to construct this UUID from.
IllegalArgumentException
- argument must be 16 bytespublic UUID(DataInput input) throws IOException
Constructs a UUID from a DataInput. Note if 16 bytes are not available this method will block.
input
- the datainput with 16 bytes to read in from.
IOException
- exception if there is an IO problem also argument must contain 16 bytes.public UUID(long mostSignificant, long leastSignificant)
Constructs a UUID from two long values in most significant byte, and least significant bytes order.
mostSignificant
- - the most significant 8 bytes of the uuid to be constructed.leastSignificant
- - the least significant 8 bytes of the uuid to be constructed.public UUID(String uuidString)
Constructs a UUID from a UUID formatted String.
uuidString
- the String representing a UUID to construct this UUID
UUIDFormatException
- String must be a properly formatted UUID stringMethod Detail |
public static UUID fromString(String uuidString) throws IllegalArgumentException
Parses a string for a UUID.
uuidString
- the UUID formatted String to parse.
XXX begin modification by stefan@apache.org
IllegalArgumentException
- the String must be a properly formatted UUID String.
XXX end modification by stefan@apache.orgpublic String toString()
Returns a string representation of the UUID.
public String toUrn()
Returns a urn representation of the UUID. This is same as the
toString() value prefixed with urn:uuid:
public boolean equals(Object obj)
Compares two UUID for equality.
Object.equals(Object)
public int hashCode()
Returns a hash code value for the object.
Object.hashCode()
public int compareTo(Object compareTo) throws ClassCastException
Compares two UUID's for equality
compareTo
in interface Comparable
ClassCastException
Comparable.compareTo(Object)
public int clockSequence() throws UnsupportedOperationException
Returns the clock sequence value in the UUID. The clock sequence is a random assigned to a particular clock instance that generated the time in the timestamp of a time based UUID.
UnsupportedOperationException
- thrown if this is not a IETF variant or not a time-based UUID.public int version()
Returns the version of the UUID.
public int variant()
Returns the variant field of the UUID.
Constants.VARIANT_NCS_COMPAT
,
Constants.VARIANT_IETF_DRAFT
,
Constants.VARIANT_MS
,
Constants.VARIANT_FUTURE
public long node() throws UnsupportedOperationException
Returns the node identifier found in this UUID. The specification was written such that this value holds the IEEE 802 MAC address. The specification permits this value to be calculated from other sources other than the MAC.
UnsupportedOperationException
- thrown if this is not a IETF variant or not a time-based UUID.public long timestamp() throws UnsupportedOperationException
Returns the timestamp value of the UUID as 100-nano second intervals since the Gregorian change offset (00:00:00.00, 15 October 1582 ).
UnsupportedOperationException
- thrown if this is not a IETF variant or not a time-based UUID.public byte[] getRawBytes()
Returns a copy of the byte values contained in this UUID.
public static UUID randomUUID()
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