annotate Lib/IMPL/ORM/Schema/TransformToSQL.pm @ 96:4c55aed00ff2

Minor changes
author wizard
date Fri, 30 Apr 2010 15:03:38 +0400
parents 2d1c3f713280
children 4267a2ac3d46
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 package IMPL::ORM::Schema::TransformToSQL;
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2 use strict;
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3 use warnings;
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4
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5 use base qw(IMPL::DOM::Transform);
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6 use IMPL::Class::Property;
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7 use IMPL::SQL::Types qw(DateTime Varchar Integer Float Text Binary);
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8
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9 require IMPL::SQL::Schema;
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10
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11 BEGIN {
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12 public property Types => prop_get | owner_set;
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13 }
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14
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15 our %CTOR = (
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16 'IMPL::DOM::Transform' => sub {
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17 ORMSchema => \&ORMSchemaTransform,
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18 Entity => \&EntityTransform,
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19 Field => \&FieldTransform,
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20 HasOne => \&HasOneTransform,
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21 HasMany => \&HasManyTransform,
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22 Subclass => \&SubclassTransform,
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23 ValueType => sub {}
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24 }
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25 );
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26
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27 sub CTOR {
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28 my ($this,$refTypeMap) = @_;
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29
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30 $this->Types($refTypeMap) or die new IMPL::InvalidArgumentException("A reference to the type map hash is required");
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31 }
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32
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33 sub ORMSchemaTransform {
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34 my ($this,$node) = @_;
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35
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36 my $schema = IMPL::SQL::Schema->new(Name => ref $node);
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37
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38 my @constraints;
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39
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40 my %ctx = (Schema => $schema);
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41
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42 # all tables
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43 foreach my $entity ($node->selectNodes('Entity')) {
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44 $schema->AddTable($this->Transform($entity,\%ctx));
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45 push @constraints, $entity->selectNodes(sub {$_->isa('IMPL::ORM::Schema::Relation')});
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46 }
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47
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48 # establish relations
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49 $this->Transform($_,\%ctx) foreach @constraints;
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50
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51 return $schema;
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52 }
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53
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54 sub EntityTransform {
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55 my ($this,$node,$ctx) = @_;
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56
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57 my $table = IMPL::SQL::Schema::Table->new(Name => $node->entityName, Schema => $ctx->{Schema});
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58
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59 $this->MakePrimaryKey($table);
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60
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61 $table->InsertColumn( $this->Transform($_,$ctx)) foreach$node->selectNodes('Field');
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62
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63 return $table;
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64 }
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65
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66 sub FieldTransform {
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67 my ($this,$field,$ctx) = @_;
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68
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69 return {
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70 Name => $field->fieldName,
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71 Type => $this->MapType($field->fieldType) || die new IMPL::Exception("Can't get map a rom schema type to the SQL type",$field->fieldType),
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72 CanBeNull => $field->fieldNullable
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73 };
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74 }
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75
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76 sub HasOneTransform {
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77 my ($this,$relation,$ctx) = @_;
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78
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79 my $sqlSchema = $ctx->{Schema};
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80 my $table = $sqlSchema->Tables->{$relation->parentNode->entityName};
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81 my $tableForeign = $sqlSchema->Tables->{$relation->target};
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82 my $prefix = $relation->name;
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83
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84 my @fkColumns = @{$tableForeign->PrimaryKey->Columns};
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85
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86 if (@fkColumns > 1) {
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87 @fkColumns = map
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88 $table->InsertColumn({
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89 Name => $prefix . $_->Name,
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90 Type => $_->Type,
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91 CanBeNull => 1
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92 }), @fkColumns;
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93 } else {
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94 @fkColumns = $table->InsertColumn({
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95 Name => $prefix,
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96 Type => $fkColumns[0]->Type,
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97 CanBeNull => 1
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98 });
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99 }
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100
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101 $table->LinkTo($tableForeign,@fkColumns);
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102 }
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103
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104 sub HasManyTransform {
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105 my ($this,$relation,$ctx) = @_;
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106
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107 #similar to HasOne
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108
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109 my $sqlSchema = $ctx->{Schema};
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110 my $table = $sqlSchema->Tables->{$relation->parentNode->entityName};
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111 my $tableForeign = $sqlSchema->Tables->{$relation->target};
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112 my $prefix = $relation->name;
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113
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114 my @fkColumns = @{$table->PrimaryKey->Columns};
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115
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116 if (@fkColumns > 1 ) {
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117 @fkColumns = map $tableForeign->InsertColumn({
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118 Name => $prefix . $_->Name,
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119 Type => $_->Type,
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120 CanBeNull => 1
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121 }), @fkColumns;
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122 } else {
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123 @fkColumns = $tableForeign->InsertColumn({
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124 Name => $prefix,
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125 Type => $fkColumns[0]->Type,
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126 CanBeNull => 1
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127 });
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128 }
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129
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130 $tableForeign->LinkTo($table,@fkColumns);
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131 }
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132
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133 sub SubclassTransform {
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134 # actually this rlations has only logical implementation
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135 }
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136
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137 sub MapType {
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138 my ($this,$typeName) = @_;
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139
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140 $this->Types->{$typeName} || die new IMPL::Exception("Can't map a type",$typeName);
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141 }
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142
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143 sub MakePrimaryKey {
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144 my ($this,$table) = @_;
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145
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146 $table->InsertColumn( {Name => '_Id', Type => Integer } );
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147 $table->SetPrimaryKey('_Id');
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148 }
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149
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150 {
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151 my $std;
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152 sub Std {
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153 $std ||= __PACKAGE__->new({
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154 String => Varchar(255),
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155 DateTime => DateTime,
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156 Integer => Integer,
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157 Float => Float(24),
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158 Decimal => Float(53),
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159 Real => Float(24),
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160 Binary => Binary,
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161 Text => Text
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162 });
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163 }
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164 }
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165
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166 1;
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167
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168 __END__
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169
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170 =pod
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171
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172 =head1 SYNOPSIS
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173
79
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174 =begin code
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175
49
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176 my $sqlSchema = IMPL::ORM::Schema::TransformToSQL->Default->Transform(Data::Schema->instance);
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177
79
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178 =end code
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179
49
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180 =cut
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181