org.apache.storm.cassandra.query.selector

Class FieldSelector

java.lang.Object

org.apache.storm.cassandra.query.selector.FieldSelector

All Implemented Interfaces:

Serializable

public class FieldSelector
extends Object
implements Serializable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected String	field

Constructor Summary

Constructors

Constructor and Description
FieldSelector(String field) Creates a new FieldSelector instance.

Method Summary

Modifier and Type	Method and Description
FieldSelector	as(String as) Sets an alias for this field.
protected Object	getFieldValue(ITuple tuple)
FieldSelector	now() Sets the fields as an automatically generated TimeUUID.
Column	select(ITuple t)

Methods inherited from class java.lang.Object

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

Field Detail

field

protected final String field

Constructor Detail

FieldSelector

public FieldSelector(String field)

Creates a new FieldSelector instance.

Parameters:

field - the name of value.

Method Detail

select

public Column select(ITuple t)

getFieldValue

protected Object getFieldValue(ITuple tuple)

Parameters:

tuple -

Returns:

Compute the value of this field from given tuple.

now

public FieldSelector now()

Sets the fields as an automatically generated TimeUUID.

Returns:

this.

as

public FieldSelector as(String as)

Sets an alias for this field.

Parameters:

as - the alias name.

Returns:

this.