com.yahoo.bard.webservice.sql

Class ApiToFieldMapper

java.lang.Object

com.yahoo.bard.webservice.sql.ApiToFieldMapper

All Implemented Interfaces:

Function<String,String>

public class ApiToFieldMapper
extends Object
implements Function<String,String>

Maps between logical and physical column names given a table schema.

Constructor Summary

Constructors

Constructor and Description
ApiToFieldMapper(PhysicalTableSchema physicalTableSchema) Construct the alias maker with the given schema.

Method Summary

Modifier and Type	Method and Description
String	apply(String input)
String	unApply(String input) Finds the api name given a field name and if none are found then it returns the given input.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Constructor Detail

ApiToFieldMapper

public ApiToFieldMapper(PhysicalTableSchema physicalTableSchema)

Construct the alias maker with the given schema.

Parameters:

physicalTableSchema - The physical table schema which maps between logical and physical column names.

Method Detail

apply

public String apply(String input)

Specified by:

apply in interface Function<String,String>

unApply

public String unApply(String input)

Finds the api name given a field name and if none are found then it returns the given input.

Parameters:

input - The string to attempt to unalias.

Returns:

the api name of the column or the original input if no mapping was found.