com.neurosys.etl.common.transformers

Class EntityChainAccessModifierTransformer

java.lang.Object

com.neurosys.etl.common.transformers.EntityChainAccessModifierTransformer

All Implemented Interfaces:

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

public class EntityChainAccessModifierTransformer
extends Object
implements FunctionTransformer

A convenient way to modify an entity accessor (e.g. a.b.c), using a modifier

• Dot chaining convention like "a.b.c". Assuming the passed entity has an attribute a; a contains b; b contains c.
• Map based derivation: One may also substitute and derive from Maps where c could be a Key in a Map b in the entity a.
• List/Object Array based derivation: If List is provided; one can provide Index number as the accessor.
• NO JSON SUPPORT YET

This differs from EntityChainAccessTransformer in the sense that the transformation returns the original Entity but modifies the accessor using the modifier
TODO: Add unit test case for List scenarios

Author:

Arjun Dhar

See Also:

EntityChainAccessTransformer

Constructor Summary

Constructors

Constructor and Description
EntityChainAccessModifierTransformer()
EntityChainAccessModifierTransformer(String accessor, org.apache.commons.collections.Transformer modifier)

Method Summary

Modifier and Type	Method and Description
String	getAccessor() A string representation in a.b.c format; where any word represents a property as an entity or a map.
org.apache.commons.collections.Transformer	getModifier() Apply the modifier on the accessor
boolean	isReturnNullOnException() If true return null as output for this transformer on an Exception rather than throw an Exception
boolean	isTransformInput() if true will apply the #transformer over the input rather than the property itself
void	setAccessor(String accessor) A string representation in a.b.c format; where any word represents a property as an entity or a map.
void	setModifier(org.apache.commons.collections.Transformer modifier) Apply the modifier on the accessor
void	setReturnNullOnException(boolean returnNullOnException) If true return null as output for this transformer on an Exception rather than throw an Exception
void	setTransformInput(boolean transformInput) if true will apply the #transformer over the input rather than the property itself
Object	transform(Object input)

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

EntityChainAccessModifierTransformer

public EntityChainAccessModifierTransformer()

EntityChainAccessModifierTransformer

public EntityChainAccessModifierTransformer(String accessor,
                                            org.apache.commons.collections.Transformer modifier)

Method Detail

transform

public Object transform(Object input)

Specified by:

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

getAccessor

public String getAccessor()

A string representation in a.b.c format; where any word represents a property as an entity or a map.

setAccessor

public void setAccessor(String accessor)

A string representation in a.b.c format; where any word represents a property as an entity or a map.

isReturnNullOnException

public boolean isReturnNullOnException()

If true return null as output for this transformer on an Exception rather than throw an Exception

setReturnNullOnException

public void setReturnNullOnException(boolean returnNullOnException)

If true return null as output for this transformer on an Exception rather than throw an Exception

getModifier

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

Apply the modifier on the accessor

setModifier

public void setModifier(org.apache.commons.collections.Transformer modifier)

Apply the modifier on the accessor

isTransformInput

public boolean isTransformInput()

if true will apply the #transformer over the input rather than the property itself

Default value:

false

setTransformInput

public void setTransformInput(boolean transformInput)

if true will apply the #transformer over the input rather than the property itself

Default value:

false