com.hp.util.persistence.cassandra.entitymgr.column

Class ValuelessColumn<C extends Serializable & Comparable<C>>

java.lang.Object

com.hp.util.persistence.cassandra.entitymgr.column.Column<C,Void>

com.hp.util.persistence.cassandra.entitymgr.column.ValuelessColumn<C>

Type Parameters:

C - type of the column name or column key

All Implemented Interfaces:

Visitable<ColumnVisitor<C>>

public final class ValuelessColumn<C extends Serializable & Comparable<C>>
extends Column<C,Void>

Defined for creating Value-less column.

Author:

Nachiket Abhyankar

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ValuelessColumn.ValuelessColumnDecoder<C extends Serializable & Comparable<C>> Value-less column decoder.

Field Summary

Fields inherited from class com.hp.util.persistence.cassandra.entitymgr.column.Column

serializer

Constructor Summary

Constructors

Constructor and Description
ValuelessColumn(ColumnName<C,Void> name) Creates a boolean column with no value.

Method Summary

Modifier and Type	Method and Description
void	accept(ColumnVisitor<C> visitor) Accepts a visitor (See visitor pattern).
int	compareTo(Column<C,Void> o2) Valueless column does not contain any values.

Methods inherited from class com.hp.util.persistence.cassandra.entitymgr.column.Column

equals, getName, getSerializer, getValue, hashCode, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ValuelessColumn

public ValuelessColumn(ColumnName<C,Void> name)

Creates a boolean column with no value.

Parameters:

name - column's name

Method Detail

compareTo

public int compareTo(Column<C,Void> o2)

Valueless column does not contain any values. We will compare the names instead.

Specified by:

compareTo in class Column<C extends Serializable & Comparable<C>,Void>

Parameters:

o2 - The other valueless column.

Returns:

comparison result.

accept

public void accept(ColumnVisitor<C> visitor)

Description copied from interface: Visitable

Accepts a visitor (See visitor pattern).

Parameters:

visitor - visitor.