org.thales.punch.libraries.punchlang.resource.builder

Class CsvToArrayResourceBuilder

java.lang.Object

org.thales.punch.libraries.punchlang.resource.builder.AbstractCsvLineResourceBuilder

org.thales.punch.libraries.punchlang.resource.builder.CsvToArrayResourceBuilder

All Implemented Interfaces:

IResourceBuilder

public class CsvToArrayResourceBuilder
extends AbstractCsvLineResourceBuilder

This builder constructs an array tuple from a CSV file provided in a streaming line by line mode.

This builder always return a new array, it does not support an in place update strategy.

This is a rare case as most CSV resource files are used to be transformed as a dictionary tuple. Check out the CSV dictionary builder.

Author:

dimi

Nested Class Summary

Nested classes/interfaces inherited from interface org.thales.punch.libraries.punchlang.api.IResourceBuilder

IResourceBuilder.CompactionType

Field Summary

Fields inherited from class org.thales.punch.libraries.punchlang.resource.builder.AbstractCsvLineResourceBuilder

columns, csvOperator

Constructor Summary

Constructors

Constructor and Description
CsvToArrayResourceBuilder(List<String> columns, String delimiter, boolean inferTypes, boolean lowerCase, boolean hasHeader) Ctor.

Method Summary

Modifier and Type	Method and Description
Tuple	onEnd() Callback that tells you the scan is done.
void	onStart() Callback to tell you you are about to receive new lines.

Methods inherited from class org.thales.punch.libraries.punchlang.resource.builder.AbstractCsvLineResourceBuilder

onStream

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.thales.punch.libraries.punchlang.api.IResourceBuilder

prepare

Constructor Detail

CsvToArrayResourceBuilder

public CsvToArrayResourceBuilder(List<String> columns,
                                 String delimiter,
                                 boolean inferTypes,
                                 boolean lowerCase,
                                 boolean hasHeader)

Ctor.

Parameters:

columns - the expected csv columns

delimiter - the csv delimiter

inferTypes - true to make the inner tuple typed.

hashKey - not null to declare the key to be used to build the hash table

lowerCase - true if keys must be converted to loewr cases

hasHeader - true if the csv file has a header with column declared

compact - true to leverage compact tuples

Method Detail

onStart

public void onStart()

Description copied from interface: IResourceBuilder

Callback to tell you you are about to receive new lines.

Specified by:

onStart in interface IResourceBuilder

Overrides:

onStart in class AbstractCsvLineResourceBuilder

onEnd

public Tuple onEnd()

Description copied from interface: IResourceBuilder

Callback that tells you the scan is done. You can safely terminate and return the building of your resource.

You should typically free any temporary storage, if any, used to build your resource.

Returns:

the built resource.