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package Alzabo::Runtime::RowCursor; |
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use strict; |
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453
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use vars qw($VERSION); |
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497
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use Alzabo::Exceptions; |
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100
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use Alzabo::Runtime; |
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use Params::Validate qw( :all ); |
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3573
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Params::Validate::validation_options( on_fail => sub { Alzabo::Exception::Params->throw( error => join '', @_ ) } ); |
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use base qw( Alzabo::Runtime::Cursor ); |
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1449
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$VERSION = 2.0; |
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5595
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use constant NEW_SPEC => { statement => { isa => 'Alzabo::DriverStatement' }, |
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table => { isa => 'Alzabo::Runtime::Table' }, |
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76
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}; |
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sub new |
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{ |
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0
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1
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my $proto = shift; |
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0
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0
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my $class = ref $proto || $proto; |
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0
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my %p = validate( @_, NEW_SPEC ); |
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0
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my $self = bless { %p, |
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count => 0, |
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}, $class; |
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0
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return $self; |
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} |
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sub next |
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{ |
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0
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1
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my $self = shift; |
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38
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0
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my $row; |
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40
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# This loop is intended to allow the end caller to ignore rows |
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# that can't be created because they're not in the table. |
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# |
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# For example, imagine that query in the statement is looking at |
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# table 'foo' to get PK values for table 'bar'. If table 'foo' |
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# has a record indicating that there is a row in 'bar' where PK == |
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# 1 but no such row actually exists then we want to skip this. |
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# |
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# If they really want to know we do save the exception. |
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0
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until ( defined $row ) |
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{ |
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0
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my @row = $self->{statement}->next; |
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53
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0
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0
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0
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last unless @row && grep { defined } @row; |
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54
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55
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0
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my %hash; |
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0
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my @pk = $self->{table}->primary_key; |
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0
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@hash{ map { $_->name } @pk } = @row[0..$#pk]; |
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58
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59
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0
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my %prefetch; |
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0
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0
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0
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if ( (my @pre = $self->{table}->prefetch) && @row > @pk ) |
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{ |
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0
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@prefetch{@pre} = @row[$#pk + 1 .. $#row]; |
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} |
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65
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0
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$row = $self->{table}->row_by_pk( @_, |
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pk => \%hash, |
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prefetch => \%prefetch, |
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0
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%{ $self->{row_params} }, |
69
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); |
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} |
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72
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0
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0
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return unless $row; |
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0
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$self->{count}++; |
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75
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0
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return $row; |
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} |
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78
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sub all_rows |
79
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{ |
80
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0
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0
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1
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my $self = shift; |
81
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82
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0
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my @rows; |
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0
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while ( my $row = $self->next ) |
84
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{ |
85
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0
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push @rows, $row; |
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} |
87
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88
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89
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0
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$self->{count} = scalar @rows; |
90
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91
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0
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return @rows; |
92
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} |
93
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94
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95
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1; |
96
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97
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__END__ |