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1 package Schema::Form::Filter;
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2 use strict;
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3 use Common;
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4 our @ISA = qw(Object);
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5
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6 my %LoadedModules;
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7
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8 BEGIN {
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9 DeclareProperty Name => ACCESS_READ;
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10 DeclareProperty Class => ACCESS_READ;
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11 DeclareProperty Args => ACCESS_READ;
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12 DeclareProperty Attributes => ACCESS_READ;
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13 DeclareProperty _Instance => ACCESS_READ;
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14 }
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15
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16 sub CTOR {
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17 my ($this,%args) = @_;
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18
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19 $this->{$Name} = $args{'Name'} or die new Exception('A filter name is required');
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20 $this->{$Class} = $args{'Class'} or die new Exception('A filter class is required');
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21 $this->{$Args} = $args{'Args'};
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22 $this->{$Attributes} = {};
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23 }
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24
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25 sub Create {
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26 my ($this) = @_;
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27
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28 if (not $LoadedModules{$this->{$Class}}) {
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29 eval "require $this->{$Class};" or die new Exception('Can\'t load the specified filter',$this->{$Name},$this->{$Class},$@);
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30 $LoadedModules{$this->{$Class}} = 1;
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31 }
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32
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33 return $this->{$Class}->new($this->{$Name},$this->{$Attributes}{'message'},$this->Args);
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34 }
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35
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36 sub Instance {
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37 my ($this) = @_;
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38
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39 if (my $instance = $this->{$_Instance}) {
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40 return $instance;
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41 } else {
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42 return $this->{$_Instance} = $this->Create;
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43 }
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44 }
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45
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46 1;
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