NAME

Text::FixedWidth::Parser - Used to parse the fixed width text file 

DESCRIPTION

The Text::FixedWidth::Parser module allows you to read fixed width text file by specifying string mapper

SYNOPSIS

 use Text::FixedWidth::Parser;

 FileData
 ~~~~~~~~
 ADDRESS001XXXXX YYYYYYY84 SOUTH STREET USA
 MARK00182869890         
 ADDRESS002YYYYYYY      69 BELL STREET  UK 
 MARK00288698939         

 my $string_mapper = [
       {
           Rule => {
               LinePrefix => [1, 7],
               Expression => "LinePrefix eq 'ADDRESS'"
           },
           Id   => [8,  3],
           Name => [11, 13],
           Address => {DoorNo => [24, 2], Street => [26, 14]},
           Country => [40, 3]
       },
       {
           Rule => {
               LinePrefix => [1, 4],
               Expression => "LinePrefix eq 'MARK'"
           },
           Id    => [5,  3],
           Mark1 => [8,  2],
           Mark2 => [10, 2],
           Mark3 => [12, 2],
           Mark4 => [14, 3],
       }
 ];


 # StringMapper should be passed while creating object
 my $obj = Text::FixedWidth::Parser->new( 
               { 
                  #Required Params
                  StringMapper  => $string_mapper,
                  #optional Params
                  ConcateString => '', 
                  EmptyAsUndef  => 1
               }
           );

 open my $fh, '<', 'filename';

 $data = $obj->read($fh);

PARAMS

StringMapper

* StringMapper can be HASHRef or multiple StringMappers as ARRAY of HASHRefs.
* If Multiple StringMappers exist, Based on Rule apropriate StringMapper will get selected.
* In Multiple StringMappers, Its better to place Rule-less mapper after Rule based mappers.
     * Rule-less mapper will picked as soon as its get access in an array
* StringMapper fields should be defined as ARRAY, First element as StringPoint of string and Second element as length of the string.
* Rule, Expression are keywords, overriding or changing those will affect the functionality.

ConcateString

    * StringMapper can have field values can be defined as {Address => [24, 2, 26, 14]}, 
    * This reperesents Address field will value will be concatenation of two strings, 
      which are has Startingpoint 24, Length 2 and Startingpoint 26, Lenght 14.
    * While concatenate those two strings value of ConcateString String will be used in between those .
	  Eg: ConcateString = '-';  
          The Value of Address = 84-SOUTH STREET    
    * Space(' ') is default ConcateString

EmptyAsUndef

    * If this flag is enabled, Empty values will be assigned as undef
	* Eg: Name = '', it will be assigned as Name = undef

METHODS

get_string_mapper

Desc : This method will return the StringMapper

Params : NONE

Returns: HASHRef as Mentioned in the config

set_string_mapper

Desc : This method is used set the StringMapper

Params : StringMapper

Returns: NONE

get_concate_string

Desc : This method will return the ConcateString

Params : NONE

Returns: ConcateString

set_concate_string

Desc : This method is used to set ConcateString

Params : String

Returns: NONE

is_empty_undef

Desc : This method will indeicate is empty flag enabled or disabled

Params : NONE

Returns: 1 on enabled, 0 on disabled

set_empty_undef

Desc : This method used to enable or disable EmptyAsUndef flag

Params : 1 to enable, 0 to disable

Returns: NONE

read

Desc : This method is used to read the line by line values

Params : FileHandle

Returns: HASHRef as Mentioned in the StringMapper

Eg : {
         'Address' => {
           'DoorNo' => '84',
           'Street' => 'SOUTH STREET'
         },
         'Country' => 'USA',
         'Id' => '001',
         'Name' => 'XXXXX YYYYYYY'
      }

read_all

Desc : This method is used to read complete file

Params : FileHandle

Returns: HASHRef as Mentioned in the StringMapper

Eg : [
        {
          'Address' => {
            'DoorNo' => '84',
            'Street' => 'SOUTH STREET'
          },
          'Country' => 'USA',
          'Id' => '001',
          'Name' => 'XXXXX YYYYYYY'
        },
        {
          'Id' => '001',
          'Mark1' => '82',
          'Mark2' => '86',
          'Mark3' => '98',
          'Mark4' => '90'
        },
        {
          'Address' => {
            'DoorNo' => '69',
            'Street' => 'BELL STREET'
          },
          'Country' => 'UK',
          'Id' => '002',
          'Name' => 'YYYYYYY'
        },
        {
          'Id' => '002',
          'Mark1' => '88',
          'Mark2' => '69',
          'Mark3' => '89',
          'Mark4' => '39'
        }
      ]

LICENSE

This library is free software; you can redistribute and/or modify it under the same terms as Perl itself.

AUTHORS

Venkatesan Narayanan, <venkatesanmusiri@gmail.com>