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1 package Schema::DB::Constraint;
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2 use Common;
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3 our @ISA = qw(Object);
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4
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5 BEGIN {
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6 DeclareProperty Name => ACCESS_READ;
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7 DeclareProperty Table => ACCESS_READ;
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8 DeclareProperty Columns => ACCESS_READ;
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9 }
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10
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11 sub CTOR {
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12 my ($this,%args) = @_;
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13 die new Exception("The table argument must be an instance of a table object") if not UNIVERSAL::isa($args{'Table'},'Schema::DB::Table');
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14 $this->{$Name} = $args{'Name'};
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15 $this->{$Table} = $args{'Table'};
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16 $this->{$Columns} = [map { ResolveColumn($this->Table,$_) } @{$args{'Columns'}}];
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17 }
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18
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19 sub ResolveColumn {
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20 my ($Table,$Column) = @_;
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21
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22 my $cn = UNIVERSAL::isa($Column,'Schema::DB::Column') ? $Column->Name : $Column;
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23
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24 my $resolved = $Table->Column($cn);
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25 die new Exception("The column is not found in the table", $cn, $Table->Name) if not $resolved;
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26 return $resolved;
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27 }
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28
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29 sub HasColumn {
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30 my ($this,@Columns) = @_;
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31
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32 my %Columns = map { $_, 1} @Columns;
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33
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34 return scalar(grep { $Columns{$_->Name} } $this->Columns) == scalar(@Columns);
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35 }
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36
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37 sub UniqName {
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38 my ($this) = @_;
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39 return $this->{$Table}->Name.'_'.$this->{$Name};
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40 }
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41
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42 sub Dispose {
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43 my ($this) = @_;
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44
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45 delete @$this{$Table,$Columns};
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46 $this->SUPER::Dispose;
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47 }
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48 1; |
