com.googlecode.n_orm.memory

Class Memory.Table.Row.ColumnFamily

java.lang.Object

com.googlecode.n_orm.memory.Memory.Table.Row.ColumnFamily

Enclosing class:

Memory.Table.Row

public class Memory.Table.Row.ColumnFamily
extends Object

A column family owning values. Values are sorted according to their qualifier so that rage search can be fast.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	Memory.Table.Row.ColumnFamily.ByteValue
class	Memory.Table.Row.ColumnFamily.IncrementingValue
class	Memory.Table.Row.ColumnFamily.Value<T>

Field Summary

Fields

Modifier and Type	Field and Description
String	name The name for this column family

Constructor Summary

Constructors

Constructor and Description
ColumnFamily(String name)

Method Summary

Modifier and Type	Method and Description
Map<String,byte[]>	getValues(String fromQualifierIncl, String toQualifierIcl) The set of values in this column family mapped according to their qualifier.
void	incr(String qualifier, Number increment) Increments the value at the given key.
protected Memory.Table.Row.ColumnFamily.Value<?>	newElement(String qualifier) Creates a byte value
Memory.Table.Row.ColumnFamily.Value<?>	remove(String key) Removes an element from the map.
void	removeAll(Set<String> keys) Removes elements from the map according to their keys.

Methods inherited from class java.lang.Object

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

Field Detail

name

public final String name

The name for this column family

Constructor Detail

ColumnFamily

public ColumnFamily(String name)

Method Detail

newElement

protected Memory.Table.Row.ColumnFamily.Value<?> newElement(String qualifier)

Creates a byte value

Parameters:

qualifier - the key for the newly created element

Returns:

the created element that is not in this map yet

incr

public void incr(String qualifier,
                 Number increment)

Increments the value at the given key.

Parameters:

qualifier - the qualifier of the incremented value

increment - the non-null increment to be applied

getValues

public Map<String,byte[]> getValues(String fromQualifierIncl,
                                    String toQualifierIcl)

The set of values in this column family mapped according to their qualifier. Qualifiers must be included between fromQualifierIncl and toQualifierIcl

remove

public final Memory.Table.Row.ColumnFamily.Value<?> remove(String key)

Removes an element from the map.

Parameters:

key - the non-null key of the element

Returns:

the previous value for the map

removeAll

public final void removeAll(Set<String> keys)

Removes elements from the map according to their keys.

Parameters:

keys - the list of keys to remove