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

Class CsvToMapResourceBuilder

java.lang.Object

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

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

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

All Implemented Interfaces:

IResourceBuilder

public class CsvToMapResourceBuilder
extends AbstractCsvResourceBuilder

Load a CSV as a resource tuple. This builder reads the input file or resource using a streaming strategy and parse the CSV on the fly.

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
CsvToMapResourceBuilder(Supplier<IResourceTuple> supplier, List<String> columns, String delimiter, boolean inferTypes, String hashKey, boolean lowerCase, boolean hasHeader) Ctor.

Method Summary

Modifier and Type	Method and Description
void	onStart() The same resource tuple is kept in memory, we simply signal a new loading is about to happen.

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

onEnd

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

CsvToMapResourceBuilder

public CsvToMapResourceBuilder(Supplier<IResourceTuple> supplier,
                               List<String> columns,
                               String delimiter,
                               boolean inferTypes,
                               String hashKey,
                               boolean lowerCase,
                               boolean hasHeader)

Ctor.

Parameters:

supplier - the tuple supplier. It is invoked at every re‚Singsource loading.

isLazy - true to make the tuple contain only strings, to avoid costly inner tuples. This is backed by special tuple implementations.

hashKey - the key to be used as a hash key for the resource tuple.

lowerCaseKeys - true to convert all keys to lower case‚

Method Detail

onStart

public void onStart()

The same resource tuple is kept in memory, we simply signal a new loading is about to happen.

Specified by:

onStart in interface IResourceBuilder

Overrides:

onStart in class AbstractCsvLineResourceBuilder