annotate Lib/IMPL/SQL/Schema/Table.pm @ 273:ad93c9f4dd93

+Added support for destructors, (special method named DTOR)
author sergey
date Tue, 29 Jan 2013 17:19:10 +0400
parents 56364d0c4b4f
children 4ddb27ff4a0b
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1 use strict;
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2 package IMPL::SQL::Schema::Table;
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3
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4 use IMPL::lang qw(:declare is);
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5
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6 use parent qw(
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7 IMPL::Object
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8 IMPL::Object::Disposable
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9 );
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10
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11 require IMPL::SQL::Schema::Column;
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12 require IMPL::SQL::Schema::Constraint;
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13 require IMPL::SQL::Schema::Constraint::PrimaryKey;
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14 require IMPL::SQL::Schema::Constraint::ForeignKey;
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15
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16 use IMPL::Class::Property::Direct;
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17
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18 BEGIN {
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19 public _direct property name => PROP_GET;
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20 public _direct property schema => PROP_GET;
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21 public _direct property columns => PROP_GET;
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22 public _direct property constraints => PROP_GET;
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23 public _direct property columnsByName => 0;
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24 public _direct property primaryKey => PROP_GET;
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25 public _direct property tag => PROP_ALL;
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26 }
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27
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28 sub CTOR {
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29 my ($this,%args) = @_;
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30
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31 $this->{$name} = $args{'name'} or die new IMPL::InvalidArgumentException('a table name is required');
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32 $this->{$schema} = $args{'schema'} or die new IMPL::InvalidArgumentException('a parent schema is required');
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33
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34 if ($args{columns}) {
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35 die new IMPL::InvalidOperationException('A columns property should be a reference to an array') unless ref $args{columns} eq 'ARRAY';
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36
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37 $this->InsertColumn($_) foreach @{$args{columns}};
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38 }
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39 }
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40
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41 sub InsertColumn {
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42 my ($this,$column,$index) = @_;
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43
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44 $index = ($this->{$columns} ? scalar(@{$this->{$columns}}) : 0) if not defined $index;
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45
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46 die new IMPL::InvalidArgumentException("The index is out of range") if ($index < 0 || $index > ($this->{$columns} ? scalar(@{$this->{$columns}}) : 0));
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47
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48 if (UNIVERSAL::isa($column,'IMPL::SQL::Schema::Column')) {
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49
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50 } elsif (UNIVERSAL::isa($column,'HASH')) {
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51 $column = new IMPL::SQL::Schema::Column(%{$column});
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52 } else {
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53 die new IMPL::InvalidArgumentException("The invalid column parameter");
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54 }
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55
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56 if (exists $this->{$columnsByName}->{$column->name}) {
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57 die new IMPL::InvalidOperationException("The column already exists",$column->name);
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58 } else {
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59 $this->{$columnsByName}->{$column->name} = $column;
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60 splice @{$this->{$columns}},$index,0,$column;
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61 }
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62
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63 return $column;
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64 }
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65
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66 sub RemoveColumn {
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67 my ($this,$NameOrColumn,$Force) = @_;
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68
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69 my $ColName;
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70 if (UNIVERSAL::isa($NameOrColumn,'IMPL::SQL::Schema::Column')) {
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71 $ColName = $NameOrColumn->name;
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72 } elsif (not ref $NameOrColumn) {
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73 $ColName = $NameOrColumn;
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74 }
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75
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76 if (exists $this->{$columnsByName}->{$ColName}) {
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77 my $index = 0;
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78 foreach my $column(@{$this->{$columns}}) {
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79 last if $column->name eq $ColName;
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80 $index++;
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81 }
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82
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83 my $column = $this->{$columns}[$index];
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84 if (my @constraints = $this->GetColumnConstraints($column)){
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85 $Force or die new IMPL::InvalidOperationException('Can\'t remove column which is used in the constraints',@constraints);
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86 $this->RemoveConstraint($_) foreach @constraints;
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87 }
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88
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89 my $removed = splice @{$this->{$columns}},$index,1;
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90 delete $this->{$columnsByName}->{$ColName};
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91 return $removed;
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92 } else {
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93 die new IMPL::InvalidOperationException("The column not found",$NameOrColumn->name);
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94 }
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95 }
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96
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97 sub GetColumn {
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98 my ($this,$name) = @_;
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99
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100 return $this->{$columnsByName}->{$name};
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101 }
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102
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103 sub GetColumnAt {
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104 my ($this,$index) = @_;
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105
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106 die new IMPL::InvalidArgumentException("The index is out of range")
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107 if $index < 0 || $index >= ($this->{$columns} ? scalar(@{$this->{$columns}}) : 0);
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108
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109 return $this->{$columns}[$index];
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110 }
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111
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112 sub SetColumnPosition {
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113 my ($this,$nameOrColumn,$pos) = @_;
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114
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115 my $colName;
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116 if (is($nameOrColumn,'IMPL::SQL::Schema::Column')) {
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117 $colName = $nameOrColumn->name;
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118 } elsif (not ref $nameOrColumn) {
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119 $colName = $nameOrColumn;
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120 } else {
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121 die IMPL::InvalidArgumentException->new(column => 'The specified column isn\'t found in the table');
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122 }
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123
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124 die IMPL::InvalidArgumentException->new( 'pos' => 'The specified position is invalid')
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125 if not defined $pos || $pos < 0 || $pos >= $this->columnsCount;
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126
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127 my $index = 0;
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128 foreach my $column(@{$this->{$columns}}) {
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129 last if $column->name eq $colName;
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130 $index++;
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131 }
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132
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133 if ($pos != $index) {
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134 #position needs to be changed;
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135
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136 my ($column) = splice @{$this->{$columns}}, $index, 1;
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137 splice @{$this->{$columns}}, $pos, 0, $column;
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138 }
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139
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140 return;
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141 }
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142
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143 sub columnsCount {
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144 my ($this) = @_;
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145
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146 return scalar(@{$this->{$columns}});
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147 }
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148
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149 sub ColumnsCount {
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150 goto &columnsCount;
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151 }
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152
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153 sub AddConstraint {
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154 my $this = shift;
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155 if (@_ == 1) {
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156 my ($Constraint) = @_;
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157
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158 die new IMPL::InvalidArgumentException('The invalid parameter') if not is($Constraint,typeof IMPL::SQL::Schema::Constraint);
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159
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160 $Constraint->table == $this or die new IMPL::InvalidOperationException('The constaint must belong to the target table');
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161
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162 if (exists $this->{$constraints}->{$Constraint->name}) {
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163 die new IMPL::InvalidOperationException('The table already has the specified constraint',$Constraint->name);
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164 } else {
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165 if (UNIVERSAL::isa($Constraint,'IMPL::SQL::Schema::Constraint::PrimaryKey')) {
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166 not $this->{$primaryKey} or die new IMPL::InvalidOperationException('The table already has a primary key');
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167 $this->{$primaryKey} = $Constraint;
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168 }
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169
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170 $this->{$constraints}->{$Constraint->name} = $Constraint;
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171 }
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172 } elsif( @_ == 2) {
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173 my ($type,$params) = @_;
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174
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175 $type = IMPL::SQL::Schema::Constraint->ResolveAlias($type) or
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176 die new IMPL::Exception("Can't resolve a constraint alias",$_[0]);
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177
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178 $params = {%{$params}};
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179
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180 $params->{table} = $this;
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181
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182 $this->AddConstraint($type->new(%$params));
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183 } else {
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184 die new IMPL::Exception("Wrong arguments number",scalar(@_));
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185 }
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186 }
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187
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188 sub RemoveConstraint {
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189 my ($this,$Constraint,$Force) = @_;
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190
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191 my $cn = UNIVERSAL::isa($Constraint,'IMPL::SQL::Schema::Constraint') ? $Constraint->name : $Constraint;
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192 $Constraint = $this->{$constraints}->{$cn} or die new IMPL::InvalidOperationException('The specified constraint doesn\'t exists',$cn);
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193
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194 if (UNIVERSAL::isa($Constraint,'IMPL::SQL::Schema::Constraint::PrimaryKey')) {
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195 not scalar keys %{$this->{$primaryKey}->ConnectedFK} or die new IMPL::InvalidOperationException('Can\'t remove Primary Key unless some foreign keys referenses it');
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196
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197 delete $this->{$primaryKey};
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198 }
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199 $Constraint->Dispose;
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200 delete $this->{$constraints}->{$cn};
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201 return $cn;
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202 }
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203
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204 sub GetConstraint {
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205 my ($this,$name) = @_;
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206
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207 return $this->{$constraints}{$name};
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208 }
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209
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210 sub GetConstraints {
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211 my ($this) = @_;
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212
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213 return wantarray ? values %{$this->{$constraints}} : [values %{$this->{$constraints}}];
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214 }
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215
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216 sub GetColumnConstraints {
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217 my ($this,@Columns) = @_;
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218
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219 my @cn = map { UNIVERSAL::isa($_ ,'IMPL::SQL::Schema::Column') ? $_ ->name : $_ } @Columns;
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220 exists $this->{$columnsByName}->{$_} or die new IMPL::InvalidOperationException('The specified column isn\'t found',$_) foreach @cn;
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221
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222 return grep {$_->HasColumn(@cn)} values %{$this->{$constraints}};
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223 }
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224
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225 sub SetPrimaryKey {
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226 my ($this,@ColumnList) = @_;
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227
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228 $this->AddConstraint(new IMPL::SQL::Schema::Constraint::PrimaryKey(name => $this->{$name}.'_PK', table => $this, columns => \@ColumnList));
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229 }
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230
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231 sub LinkTo {
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232 my ($this,$table,@ColumnList) = @_;
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233 $table->primaryKey or die new IMPL::InvalidOperationException('The referenced table must have a primary key');
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234 my $constraintName = $this->{$name}.'_'.$table->name.'_FK_'.join('_',map {ref $_ ? $_->name : $_} @ColumnList);
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235 $this->AddConstraint(new IMPL::SQL::Schema::Constraint::ForeignKey(name => $constraintName, table => $this, columns => \@ColumnList, referencedTable => $table, referencedColumns => $table->primaryKey->columns->as_list));
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236 }
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237
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238 sub Dispose {
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239 my ($this) = @_;
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240
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241 $_->Dispose() foreach values %{$this->{$constraints}};
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242
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243 undef %{$this};
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244 $this->SUPER::Dispose();
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245 }
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246
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247 sub SameValue {
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248 my ($this,$other) = @_;
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249
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250 return 0 unless is $other, typeof $this;
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251
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252 return 0 unless $this->name eq $other->name;
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253 return 0 unless $this->ColumnsCount eq $other->ColumnsCount;
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254
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255 for (my $i = 0; $i < $this->ColumsCount; $i ++) {
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256 return 0 unless $this->($i)->SameValue($other->GetColumnAt($i));
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257 }
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258
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259 my %thisConstraints = map { $_->name, $_ } $this->GetConstraints();
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260 my %otherConstraints = map { $_->name, $_ } $other->GetConstraints();
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261
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262 foreach my $name ( keys %thisConstraints ) {
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263 return 0 unless $otherConstraints{$name};
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264 return 0 unless $thisConstraints{$name}->SameValue(delete $otherConstraints{$name});
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265 }
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266
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267 return 0 if %otherConstraints;
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268
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269 return 1;
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270 }
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271
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272 1;
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273
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274