annotate Lib/IMPL/Transform.pm @ 13:bb8d67f811ea

merge heads
author Sergey
date Wed, 02 Sep 2009 23:11:14 +0400
parents 94d47b388442
children d660fb38b7cc
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1 package IMPL::Transform;
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2 use base qw(IMPL::Object);
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3
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4 use IMPL::Class::Property;
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5 use IMPL::Class::Property::Direct;
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6
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7 BEGIN {
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8 protected _direct property Templates => prop_all;
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9 protected _direct property Default => prop_all;
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10 protected _direct property Plain => prop_all;
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11 }
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12
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13 sub CTOR {
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14 my ($this,%args) = @_;
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16 $this->{$Plain} = delete $args{-plain};
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17 $this->{$Default} = delete $args{-default};
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18
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19 $this->{$Templates} = \%args;
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20 }
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21
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22 sub Transform {
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23 my ($this,$object) = @_;
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24
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25 if (not ref $object) {
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26 die new IMPL::Exception("There is no the template for a plain value in the transform") unless $this->{$Plain};
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27 my $template = $this->{$Plain};
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28 return $this->$template($object);
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29 } else {
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30
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31 my $template = $this->MatchTemplate($object) || $this->Default or die new IMPL::Transform::NoTransformException(ref $object);
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32
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33 return $this->$template($object);
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34 }
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35 }
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36
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37 sub MatchTemplate {
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38 my ($this,$object) = @_;
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39 my $class = ref $object;
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40
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41 foreach my $tClass ( keys %{$this->Templates || {}} ) {
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42 return $this->Templates->{$tClass} if ($tClass eq $class);
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43 }
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44 }
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45
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46 package IMPL::Transform::NoTransformException;
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47 use base qw(IMPL::Exception);
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48
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49 1;
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50
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51 __END__
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52
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53 =pod
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54 =head1 SYNOPSIS
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55
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56 my $obj = new AnyObject;
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57
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58 my $t = new Transform (
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59 AnyClass => sub {
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60 my ($this,$object) = @_;
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61 return new NewClass({ Name => $object->name, Document => $this->Transform($object->Data) })
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62 },
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63 DocClass => sub {
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64 my ($this,$object) = @_;
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65 return new DocPreview(Author => $object->Author, Text => $object->Data);
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66 },
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67 -default => sub {
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68 my ($this,$object) = @_;
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69 return $object;
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70 },
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71 -plain => sub {
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72 my ($this,$object) = @_;
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73 return $object;
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74 }
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75 );
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76
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77 my $result = $t->Transform($obj);
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78
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79 =head1 Summary
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80 .
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81
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82 =cut