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=head1 NAME |
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ETL::Pipeline::Input::UnitTest - Input source for unit tests |
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=head1 SYNOPSIS |
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use ETL::Pipeline; |
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ETL::Pipeline->new( { |
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input => ['UnitTest'], |
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mapping => {First => 'Header1', Second => 'Header2'}, |
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output => ['UnitTest'] |
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} )->process; |
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=head1 DESCRIPTION |
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B<ETL::Pipeline::Input::UnitTest> is an input source used by the unit tests. |
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It proves that the L<ETL::Pipeline::Input> role works. |
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The "data" is hard coded. |
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=cut |
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package ETL::Pipeline::Input::UnitTest; |
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use Moose; |
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use strict; |
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use warnings; |
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use 5.014; |
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our $VERSION = '2.00'; |
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=head1 METHODS & ATTRIBUTES |
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=head3 current |
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This array reference holds the current record. |
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=cut |
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has 'current' => ( |
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handles => { |
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fields => 'elements', |
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_get_value => 'get', |
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number_of_fields => 'count', |
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}, |
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is => 'rw', |
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isa => 'ArrayRef[Str]', |
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traits => [qw/Array/], |
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); |
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=head3 data |
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The real input source. This is the data returned by L</next_record>. |
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=cut |
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has 'data' => ( |
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default => sub { [ |
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[qw/Header1 Header2 Header3/, ' Header4 '], |
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[qw/Field1 Field2 Field3 Field4 Field5/], |
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[qw/Field6 Field7 Field8 Field9 Field0/], |
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] }, |
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handles => {retrieve => 'shift'}, |
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is => 'ro', |
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isa => 'ArrayRef[ArrayRef[Str]]', |
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traits => [qw/Array/], |
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); |
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=head2 Called from L<ETL::Pipeline/process> |
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=head3 get |
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B<get> retrieves one field from the record. Pass an index number as the field |
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name. The test data has 4 header fields and 5 values in each data row. |
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Remember that index numbers start at zero. |
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=cut |
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sub get { |
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my ($self, $index) = @_; |
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return undef unless $index =~ m/^\d+$/; |
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return $self->_get_value( $index ); |
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} |
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=head3 next_record |
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B<ETL::Pipeline::Input::UnitTest> returns 3 records by cycling through |
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L</data>. |
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=cut |
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sub next_record { |
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my $self = shift; |
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my $record = $self->retrieve; |
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if (defined $record) { |
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$self->current( $record ); |
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return 1; |
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} else { return 0; } |
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} |
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110
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111
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=head3 configure |
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113
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B<configure> doesn't actually do anything. But it is required by |
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L<ETL::Pipeline/process>. |
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116
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=cut |
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118
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10
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1
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sub configure {} |
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120
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121
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=head3 finish |
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123
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B<finish> doesn't actually do anything. But it is required by |
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L<ETL::Pipeline/process>. |
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126
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=cut |
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128
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sub finish {} |
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130
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131
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=head1 SEE ALSO |
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133
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L<ETL::Pipeline>, L<ETL::Pipeline::Input>, L<ETL::Pipeline::Output::UnitTest> |
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135
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=cut |
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137
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with 'ETL::Pipeline::Input'; |
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139
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140
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=head1 AUTHOR |
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142
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Robert Wohlfarth <robert.j.wohlfarth@vanderbilt.edu> |
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143
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144
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=head1 LICENSE |
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146
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Copyright 2016 (c) Vanderbilt University |
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148
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This program is free software; you can redistribute it and/or modify it under |
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the same terms as Perl itself. |
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150
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151
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=cut |
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153
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3
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3
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16
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no Moose; |
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12
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154
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__PACKAGE__->meta->make_immutable; |