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package Dallycot::AST::Sum; |
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our $AUTHORITY = 'cpan:JSMITH'; |
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# ABSTRACT: Calculates the sum of a list of values |
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12557
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use strict; |
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use warnings; |
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use utf8; |
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use parent 'Dallycot::AST'; |
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use Carp qw(croak); |
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1140
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use List::MoreUtils qw(all_u); |
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use Readonly; |
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10556
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Readonly my $NUMERIC => ['Numeric']; |
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sub to_string { |
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my ($self) = @_; |
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return "(" . join( "+", map { $_->to_string } @{$self} ) . ")"; |
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} |
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sub to_rdf { |
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my($self, $model) = @_; |
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# |
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# node -> expression_set -> [ ... ] |
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# |
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return $model -> apply( |
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$model -> meta_uri('loc:sum'), |
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[ @$self ], |
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{} |
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); |
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# my $bnode = $model->bnode; |
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# $model -> add_type($bnode, 'loc:Sum'); |
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# |
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# foreach my $expr (@$self) { |
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# $model -> add_expression($bnode, $expr); |
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# } |
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# return $bnode; |
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} |
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sub execute { |
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my ( $self, $engine ) = @_; |
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return $engine->collect( map { [ $_, $NUMERIC ] } @$self )->then( |
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sub { |
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my $num_durations = grep { $_ -> isa('Dallycot::Value::Duration') } @_; |
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my $num_dates = grep { $_ -> isa('Dallycot::Value::DateTime') } @_; |
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if( $num_durations == @_ ) { |
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my (@values) = map { $_ -> value } @_; |
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my $first = pop @values; |
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my $next = pop @values; |
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my $acc = $first + $next; |
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$acc += $_ for @values; |
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return Dallycot::Value::Duration->new( object => $acc ); |
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} |
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elsif( $num_durations + $num_dates == @_ && $num_dates == 1 ) { |
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my (@values) = map { $_ -> value } @_; |
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my $first = shift @values; |
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my $next = shift @values; |
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my $acc = $first + $next; |
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$acc += $_ for @values; |
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return Dallycot::Value::DateTime->new( object => $acc ); |
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} |
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elsif( $num_dates > 1 ) { |
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0
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croak 'Multiple dates can not be added together'; |
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} |
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else { |
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my (@values) = map { $_->value } @_; |
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my $acc = pop @values; |
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my $next = pop @values; |
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$acc = $acc + $next; |
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0
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$acc += $_ for @values; |
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0
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return Dallycot::Value::Numeric->new($acc); |
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} |
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} |
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0
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); |
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} |
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86
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1; |