org.apache.hadoop.hbase
Class CellComparator

java.lang.Object
  org.apache.hadoop.hbase.CellComparator

All Implemented Interfaces:

Serializable, Comparator<Cell>

@InterfaceAudience.Private
@InterfaceStability.Evolving
public class CellComparator
extends Object
implements Comparator<Cell>, Serializable

Compare two HBase cells. Do not use this method comparing -ROOT- or hbase:meta cells. Cells from these tables need a specialized comparator, one that takes account of the special formatting of the row where we have commas to delimit table from regionname, from row. See KeyValue for how it has a special comparator to do hbase:meta cells and yet another for -ROOT-.

See Also:

Serialized Form

Constructor Summary

CellComparator()

Method Summary

static boolean	areKeyLengthsEqual(Cell a, Cell b) lengths
static boolean	areRowLengthsEqual(Cell a, Cell b)
int	compare(Cell a, Cell b)
static int	compareStatic(Cell a, Cell b)
static int	compareStatic(Cell a, Cell b, boolean onlyKey)
static boolean	equals(Cell a, Cell b) equals
static boolean	equalsFamily(Cell a, Cell b)
static boolean	equalsIgnoreMvccVersion(Cell a, Cell b) special case for KeyValue.equals
static boolean	equalsQualifier(Cell a, Cell b)
static boolean	equalsRow(Cell a, Cell b)
static boolean	equalsTimestamp(Cell a, Cell b)
static boolean	equalsType(Cell a, Cell b)
static int	hashCode(Cell cell) Returns a hash code that is always the same for two Cells having a matching equals(..) result.
static int	hashCodeIgnoreMvcc(Cell cell) Returns a hash code that is always the same for two Cells having a matching equals(..) result.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

CellComparator

public CellComparator()

Method Detail

compare

public int compare(Cell a,
                   Cell b)

Specified by:

compare in interface Comparator<Cell>

compareStatic

public static int compareStatic(Cell a,
                                Cell b)

compareStatic

public static int compareStatic(Cell a,
                                Cell b,
                                boolean onlyKey)

equals

public static boolean equals(Cell a,
                             Cell b)

equals

equalsRow

public static boolean equalsRow(Cell a,
                                Cell b)

equalsFamily

public static boolean equalsFamily(Cell a,
                                   Cell b)

equalsQualifier

public static boolean equalsQualifier(Cell a,
                                      Cell b)

equalsTimestamp

public static boolean equalsTimestamp(Cell a,
                                      Cell b)

equalsType

public static boolean equalsType(Cell a,
                                 Cell b)

hashCode

public static int hashCode(Cell cell)

Returns a hash code that is always the same for two Cells having a matching equals(..) result.

hashCodeIgnoreMvcc

public static int hashCodeIgnoreMvcc(Cell cell)

Returns a hash code that is always the same for two Cells having a matching equals(..) result. Note : Ignore mvcc while calculating the hashcode

Parameters:

cell -

Returns:

hashCode

areKeyLengthsEqual

public static boolean areKeyLengthsEqual(Cell a,
                                         Cell b)

lengths

areRowLengthsEqual

public static boolean areRowLengthsEqual(Cell a,
                                         Cell b)

equalsIgnoreMvccVersion

public static boolean equalsIgnoreMvccVersion(Cell a,
                                              Cell b)

special case for KeyValue.equals