com.neurosys.etl.common.transformers

Class DefaultValueTransformer<T>

java.lang.Object

com.neurosys.etl.common.transformers.DefaultValueTransformer<T>

Type Parameters:

T - type of default

All Implemented Interfaces:

ChainAware, Lookup, FunctionTransformer<Void,T>, Serializable, Function<Void,T>, Supplier<T>, org.apache.commons.collections.Transformer

public class DefaultValueTransformer<T>
extends Object
implements Lookup, FunctionTransformer<Void,T>, Supplier<T>, ChainAware, Serializable

Allows one to simply provide a default value.
One may extend this class in case the Default Value differs for different situations

Author:

Arjun Dhar

See Also:

SeedTransformer, Serialized Form

Constructor Summary

Constructors

Constructor and Description
DefaultValueTransformer()
DefaultValueTransformer(T defaultValue)

Method Summary

Modifier and Type	Method and Description
T	get()
Chain	getChain() If the processor that implements this is part of a chain, it will return a reference to the chain else null
Object	getDefaultValue() The Default Value
Object	getPredecessor() Get the item before this one in the Chain
void	setChain(Chain chain) If the processor that implements this is part of a chain, it will have a reference to the chain
void	setDefaultValue(T defaultValue) The Default Value
void	setPredecessor(Object predecessor) Get the item before this one in the Chain
Object	transform(Object input) For a Given String, Lookup a value for it

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.neurosys.etl.common.transformers.FunctionTransformer

apply

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Constructor Detail

DefaultValueTransformer

public DefaultValueTransformer()

DefaultValueTransformer

public DefaultValueTransformer(T defaultValue)

Method Detail

transform

public Object transform(Object input)

Description copied from interface: Lookup

For a Given String, Lookup a value for it

Specified by:

transform in interface Lookup

Specified by:

transform in interface org.apache.commons.collections.Transformer

setChain

public void setChain(Chain chain)

Description copied from interface: ChainAware

If the processor that implements this is part of a chain, it will have a reference to the chain

Specified by:

setChain in interface ChainAware

Parameters:

chain - as Chain

getChain

public Chain getChain()

Description copied from interface: ChainAware

If the processor that implements this is part of a chain, it will return a reference to the chain else null

Specified by:

getChain in interface ChainAware

Returns:

Chain

getPredecessor

public Object getPredecessor()

Description copied from interface: ChainAware

Get the item before this one in the Chain

Specified by:

getPredecessor in interface ChainAware

setPredecessor

public void setPredecessor(Object predecessor)

Description copied from interface: ChainAware

Get the item before this one in the Chain

Specified by:

setPredecessor in interface ChainAware

getDefaultValue

public Object getDefaultValue()

The Default Value

Default value:

null

setDefaultValue

public void setDefaultValue(T defaultValue)

The Default Value

Default value:

null

get

public T get()

Specified by:

get in interface Supplier<T>