com.neurosys.etl.common.transformers

Class CollectionToMapSplitterTransformer

java.lang.Object

com.neurosys.etl.common.transformers.CollectionToMapSplitterTransformer

All Implemented Interfaces:

FunctionTransformer, Function, org.apache.commons.collections.Transformer

public class CollectionToMapSplitterTransformer
extends Object
implements FunctionTransformer

Take a Collection and convert it to a Map based on an identifier. This Transformer will take a Collection and convert to a Map, where the Map value is the same as the Collection. The key in the Map is constructed using Identifier if provided. The Identifier is a Transformer set in this bean via setIdentifier(Transformer); which acts on the Collection value and converts into a Key.
If the identifier Transformer throws ContinueProcessingException then that element will not be added in the Value map (i.e. it will be Skipped)

Author:

Arjun Dhar TODO: Add to unit test case, esp when identifier is null and other null conditions

Constructor Summary

Constructors

Constructor and Description
CollectionToMapSplitterTransformer()

Method Summary

Modifier and Type	Method and Description
protected Collection	create()
org.apache.commons.collections.Transformer	getIdentifier() From the record identifies which key the node will be associated with. If the identifier Transformer throws ContinueProcessingException then that element will not be added in the Value map (i.e.
org.apache.commons.collections.Transformer	getValueTransformer() (Optional) Apply over the object to obtain the value in the map
boolean	isMultipleValues() If true will indicate that the values to the Map are a Collection and not a singular Object If false the last value matching the id will be the value
void	setIdentifier(org.apache.commons.collections.Transformer identifier) From the record identifies which key the node will be associated with. If the identifier Transformer throws ContinueProcessingException then that element will not be added in the Value map (i.e.
void	setMultipleValues(boolean multipleValues) If true will indicate that the values to the Map are a Collection and not a singular Object If false the last value matching the id will be the value
void	setValueTransformer(org.apache.commons.collections.Transformer valueTransformer) (Optional) Apply over the object to obtain the value in the map
Object	transform(Object collection)

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

CollectionToMapSplitterTransformer

public CollectionToMapSplitterTransformer()

Method Detail

create

protected Collection create()

transform

public Object transform(Object collection)

Specified by:

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

getIdentifier

public org.apache.commons.collections.Transformer getIdentifier()

From the record identifies which key the node will be associated with.
If the identifier Transformer throws ContinueProcessingException then that element will not be added in the Value map (i.e. it will be Skipped)

See Also:


If null then the identifier is the Object in the collection itself

Can be null:

true

setIdentifier

public void setIdentifier(org.apache.commons.collections.Transformer identifier)

From the record identifies which key the node will be associated with.
If the identifier Transformer throws ContinueProcessingException then that element will not be added in the Value map (i.e. it will be Skipped)

See Also:


If null then the identifier is the Object in the collection itself

Can be null:

true

isMultipleValues

public boolean isMultipleValues()

If true will indicate that the values to the Map are a Collection and not a singular Object
If false the last value matching the id will be the value

Default value:

false

setMultipleValues

public void setMultipleValues(boolean multipleValues)

If true will indicate that the values to the Map are a Collection and not a singular Object
If false the last value matching the id will be the value

Default value:

false

getValueTransformer

public org.apache.commons.collections.Transformer getValueTransformer()

(Optional) Apply over the object to obtain the value in the map

Can be null:

true

setValueTransformer

public void setValueTransformer(org.apache.commons.collections.Transformer valueTransformer)

(Optional) Apply over the object to obtain the value in the map

Can be null:

true