com.neurosys.etl.common.transformers

Class IterableToMapTransformer

java.lang.Object

com.neurosys.etl.common.transformers.IterableToMapTransformer

All Implemented Interfaces:

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

public class IterableToMapTransformer
extends Object
implements FunctionTransformer, Serializable

Based on a expected order of elements in sequence; where each element can be mapped to a name in a map due to predictability of its order index.
Works on Iterable and Array types. Any index beyond sequence will be mapped using unmappedNameTransformer
Useful when we want to convert a raw output of Object array into say a Map of well defined variables.

Author:

Arjun Dhar

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
IterableToMapTransformer()
IterableToMapTransformer(String[] sequence)

Method Summary

Modifier and Type	Method and Description
String[]	getSequence() Sequence of names to map to the variables in the order of the index of the name
org.apache.commons.collections.Transformer	getUnmappedNameTransformer() Any index not in sequence; the index will be passed to this and the output will be the variable name. If this is null; then the index itself will become the key as Integer.
void	setSequence(String[] sequence) Sequence of names to map to the variables in the order of the index of the name
void	setUnmappedNameTransformer(org.apache.commons.collections.Transformer unmappedNameTransformer) Any index not in sequence; the index will be passed to this and the output will be the variable name. If this is null; then the index itself will become the key as Integer.
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

IterableToMapTransformer

public IterableToMapTransformer()

IterableToMapTransformer

public IterableToMapTransformer(String[] sequence)

Method Detail

transform

public Object transform(Object input)

Specified by:

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

getSequence

public String[] getSequence()

Sequence of names to map to the variables in the order of the index of the name

setSequence

public void setSequence(String[] sequence)

Sequence of names to map to the variables in the order of the index of the name

getUnmappedNameTransformer

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

Any index not in sequence; the index will be passed to this and the output will be the variable name. If this is null; then the index itself will become the key as Integer.

Can be null:

true

setUnmappedNameTransformer

public void setUnmappedNameTransformer(org.apache.commons.collections.Transformer unmappedNameTransformer)

Any index not in sequence; the index will be passed to this and the output will be the variable name. If this is null; then the index itself will become the key as Integer.

Can be null:

true