org.apache.gora.filter

Interface Filter<K,T extends Persistent>

Type Parameters:

K -

T -

All Superinterfaces:

org.apache.hadoop.io.Writable

All Known Implementing Classes:

FilterList, MapFieldValueFilter, SingleFieldValueFilter

public interface Filter<K,T extends Persistent>
extends org.apache.hadoop.io.Writable

Defines filtering (possibly including modification) of rows. By default all filtering is done client side. (In generic Gora classes). Datastore implementations can decide if they install remote filters, when possible.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	filter(K key, T persistent) Filter the key and persistent.

Methods inherited from interface org.apache.hadoop.io.Writable

readFields, write

Method Detail

filter

boolean filter(K key,
             T persistent)

Filter the key and persistent. Modification is possible.

Parameters:

key -

persistent -

Returns:

true if the row is filtered out (excluded), false otherwise.