com.neurosys.etl.common.transformers

Class MapCleanTransformer

java.lang.Object

com.neurosys.etl.common.transformers.MapCleanTransformer

All Implemented Interfaces:

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

public class MapCleanTransformer
extends Object
implements FunctionTransformer

Remove unnecessary elements from a Map. If the value passed to the filter qualifies then the corresponding key, value from the Map will be removed
This can be useful in cleaning Map of Null attributes etc.
If NO filter is provided by default null values will be weeded out.

Author:

Arjun Dhar TODO: Add unit test case

Constructor Summary

Constructors

Constructor and Description
MapCleanTransformer()

Method Summary

Modifier and Type	Method and Description
org.apache.commons.collections.Predicate	getFilter() If null ; entries with null values in the map will be removed If the filter is specified and returns true for a given value then it will be removed.
void	setFilter(org.apache.commons.collections.Predicate filter) If null ; entries with null values in the map will be removed If the filter is specified and returns true for a given value then it will be removed.
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

MapCleanTransformer

public MapCleanTransformer()

Method Detail

transform

public Object transform(Object input)

Specified by:

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

getFilter

public org.apache.commons.collections.Predicate getFilter()

If null ; entries with null values in the map will be removed
If the filter is specified and returns true for a given value then it will be removed.

Can be null:

true

setFilter

public void setFilter(org.apache.commons.collections.Predicate filter)

If null ; entries with null values in the map will be removed
If the filter is specified and returns true for a given value then it will be removed.

Can be null:

true