org.apache.cassandra.db.marshal
Class UUIDType

java.lang.Object
  extended by org.apache.cassandra.db.marshal.AbstractType<java.util.UUID>
      extended by org.apache.cassandra.db.marshal.UUIDType
All Implemented Interfaces:
java.util.Comparator<java.nio.ByteBuffer>

public class UUIDType
extends AbstractType<java.util.UUID>

Compares UUIDs using the following criteria:
- if count of supplied bytes is less than 16, compare counts
- compare UUID version fields
- nil UUID is always lesser
- compare timestamps if both are time-based
- compare lexically, unsigned msb-to-lsb comparison

See Also:
"com.fasterxml.uuid.UUIDComparator"

Field Summary
static UUIDType instance
           
 
Fields inherited from class org.apache.cassandra.db.marshal.AbstractType
columnComparator, columnReverseComparator, indexComparator, indexReverseComparator, reverseComparator
 
Method Summary
 int compare(java.nio.ByteBuffer b1, java.nio.ByteBuffer b2)
           
 java.util.UUID compose(java.nio.ByteBuffer bytes)
           
 java.nio.ByteBuffer decompose(java.util.UUID value)
           
 java.nio.ByteBuffer fromString(java.lang.String source)
          get a byte representation of the given string.
 java.lang.String getString(java.nio.ByteBuffer bytes)
          get a string representation of the bytes suitable for log messages
 void validate(java.nio.ByteBuffer bytes)
           
 
Methods inherited from class org.apache.cassandra.db.marshal.AbstractType
getColumnsString, getReverseComparator, getString, isCommutative, parseDefaultParameters, toString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface java.util.Comparator
equals
 

Field Detail

instance

public static final UUIDType instance
Method Detail

compare

public int compare(java.nio.ByteBuffer b1,
                   java.nio.ByteBuffer b2)

compose

public java.util.UUID compose(java.nio.ByteBuffer bytes)
Specified by:
compose in class AbstractType<java.util.UUID>

validate

public void validate(java.nio.ByteBuffer bytes)
Specified by:
validate in class AbstractType<java.util.UUID>

getString

public java.lang.String getString(java.nio.ByteBuffer bytes)
Description copied from class: AbstractType
get a string representation of the bytes suitable for log messages

Specified by:
getString in class AbstractType<java.util.UUID>

decompose

public java.nio.ByteBuffer decompose(java.util.UUID value)
Specified by:
decompose in class AbstractType<java.util.UUID>

fromString

public java.nio.ByteBuffer fromString(java.lang.String source)
                               throws MarshalException
Description copied from class: AbstractType
get a byte representation of the given string. defaults to unsupportedoperation so people deploying custom Types can update at their leisure.

Overrides:
fromString in class AbstractType<java.util.UUID>
Throws:
MarshalException


Copyright © 2012 The Apache Software Foundation