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1 package Schema::DB::Column;
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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 Type => ACCESS_READ;
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8 DeclareProperty CanBeNull => ACCESS_READ;
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9 DeclareProperty DefaultValue => ACCESS_READ;
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10 DeclareProperty Tag => ACCESS_READ;
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11 }
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12
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13 sub CTOR {
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14 my $this = shift;
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15 $this->SUPER::CTOR(@_);
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16
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17 $this->{$Name} or die new Exception('a column name is required');
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18 $this->{$CanBeNull} = 0 if not exists $this->{$CanBeNull};
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19 UNIVERSAL::isa($this->{$Type},'Schema::DB::Type') or die new Exception('a type is required for the column',$this->{$Name});
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20 }
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21
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22 sub isEqualsStr {
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23 my ($a,$b) = @_;
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24
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25 if (defined $a and defined $b) {
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26 return $a eq $b;
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27 } else {
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28 if (defined $a or defined $b) {
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29 return 0;
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30 } else {
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31 return 1;
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32 }
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33 }
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34 }
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35
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36 sub isEquals {
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37 my ($a,$b) = @_;
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38
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39 if (defined $a and defined $b) {
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40 return $a == $b;
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41 } else {
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42 if (defined $a or defined $b) {
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43 return 0;
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44 } else {
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45 return 1;
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46 }
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47 }
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48 }
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49
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50 sub isSame {
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51 my ($this,$other) = @_;
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52
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53 return ($this->{$Name} eq $other->{$Name} and $this->{$CanBeNull} == $other->{$CanBeNull} and isEqualsStr($this->{$DefaultValue}, $other->{$DefaultValue}) and $this->{$Type}->isSame($other->{$Type}));
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54 }
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55
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56 1;
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