com.neurosys.etl.common.transformers

Class EntityFieldsCopyTransformer<T,F>

java.lang.Object

com.neurosys.etl.common.transformers.EntityFieldsCopyTransformer<T,F>

All Implemented Interfaces:

ContextAware<List<T>>, org.apache.commons.collections.Transformer

public class EntityFieldsCopyTransformer<T,F>
extends Object
implements ContextAware<List<T>>, org.apache.commons.collections.Transformer

Copies fields from an Entity to another (accepts an array or Iterable of 2 objects FROM and a Collection of TO).
If the input is not an array type, it assumes it as the INPUT object and generates a clone with the required copy.
The returned object(s) is the output collection of updated entities. It optionally supports an exception list and an inverse mode.

Author:

Arjun Dhar

See Also:

CloneCollection

Field Summary

Fields

Modifier and Type	Field and Description
protected Object	exceptions List or Map of Field to its fields that are included or excluded depending on the inverseMode To support complex nested exceptions, the Map is recursive in nature for each nested field.
protected boolean	inverseMode By default, the exceptions are the fields in the entity that are EXCLUDED. In inverseMode, the exceptions list are the only ones included in the copy.

Constructor Summary

Constructors

Constructor and Description
EntityFieldsCopyTransformer()

Method Summary

Modifier and Type	Method and Description
protected Object	copy(Object inputEntity, Object outputEntity, Object exceptions)
Object	getExceptions() List or Map of Field to its fields that are included or excluded depending on the inverseMode To support complex nested exceptions, the Map is recursive in nature for each nested field.
boolean	isInverseMode() By default, the exceptions are the fields in the entity that are EXCLUDED. In inverseMode, the exceptions list are the only ones included in the copy.
void	setExceptions(Object exceptions) List or Map of Field to its fields that are included or excluded depending on the inverseMode To support complex nested exceptions, the Map is recursive in nature for each nested field.
void	setInverseMode(boolean inverseMode) By default, the exceptions are the fields in the entity that are EXCLUDED. In inverseMode, the exceptions list are the only ones included in the copy.
Object	transform(Object input)

Methods inherited from class java.lang.Object

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

Field Detail

inverseMode

protected boolean inverseMode

By default, the exceptions are the fields in the entity that are EXCLUDED.
In inverseMode, the exceptions list are the only ones included in the copy.

exceptions

protected Object exceptions

List or Map of Field to its fields that are included or excluded depending on the inverseMode

To support complex nested exceptions, the Map is recursive in nature for each nested field. The value maybe another map or a List of exception fields for the field
null key in this Map maps to the default top level object. The Map keys map to inner fields.

In inverseMode, it looks for the name of the field in the Map to follow. In the opposite mode the key represents to follow an exclude or null key to complete exclude.

Can be null:

true

Constructor Detail

EntityFieldsCopyTransformer

public EntityFieldsCopyTransformer()

Method Detail

copy

protected Object copy(Object inputEntity,
                      Object outputEntity,
                      Object exceptions)
               throws Exception

Throws:

Exception

transform

public Object transform(Object input)

Specified by:

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

isInverseMode

public boolean isInverseMode()

By default, the exceptions are the fields in the entity that are EXCLUDED.
In inverseMode, the exceptions list are the only ones included in the copy.

setInverseMode

public void setInverseMode(boolean inverseMode)

By default, the exceptions are the fields in the entity that are EXCLUDED.
In inverseMode, the exceptions list are the only ones included in the copy.

getExceptions

public Object getExceptions()

List or Map of Field to its fields that are included or excluded depending on the inverseMode

To support complex nested exceptions, the Map is recursive in nature for each nested field. The value maybe another map or a List of exception fields for the field
null key in this Map maps to the default top level object. The Map keys map to inner fields.

In inverseMode, it looks for the name of the field in the Map to follow. In the opposite mode the key represents to follow an exclude or null key to complete exclude.

Can be null:

true

setExceptions

public void setExceptions(Object exceptions)

List or Map of Field to its fields that are included or excluded depending on the inverseMode

To support complex nested exceptions, the Map is recursive in nature for each nested field. The value maybe another map or a List of exception fields for the field
null key in this Map maps to the default top level object. The Map keys map to inner fields.

In inverseMode, it looks for the name of the field in the Map to follow. In the opposite mode the key represents to follow an exclude or null key to complete exclude.

Can be null:

true