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49
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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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167
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4 use IMPL::lang qw(:declare :constants is);
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5
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165
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6 use parent qw(
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163
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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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167
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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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49
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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 @{$args{columns}};
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38 }
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39
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40 if ($args{constraints}) {
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41 die new IMPL::InvalidOperationException('A constraints property should be a reference to an array') unless ref $args{constraints} eq 'ARRAY';
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42
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43 $this->AddConstraint($_) foreach @{$args{constraints}};
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44 }
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49
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45 }
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46
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47 sub InsertColumn {
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48 my ($this,$column,$index) = @_;
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49
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50 $index = ($this->{$columns} ? scalar(@{$this->{$columns}}) : 0) if not defined $index;
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51
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52 die new IMPL::InvalidArgumentException("The index is out of range") if ($index < 0 || $index > ($this->{$columns} ? scalar(@{$this->{$columns}}) : 0));
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49
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53
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54 if (UNIVERSAL::isa($column,'IMPL::SQL::Schema::Column')) {
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55
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56 } elsif (UNIVERSAL::isa($column,'HASH')) {
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57 $column = new IMPL::SQL::Schema::Column(%{$column});
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58 } else {
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59 die new IMPL::InvalidArgumentException("The invalid column parameter");
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60 }
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61
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62 if (exists $this->{$columnsByName}->{$column->name}) {
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63 die new IMPL::InvalidOperationException("The column already exists",$column->name);
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64 } else {
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65 $this->{$columnsByName}->{$column->name} = $column;
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66 splice @{$this->{$columns}},$index,0,$column;
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67 }
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68
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69 return $column;
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70 }
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71
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72 sub RemoveColumn {
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73 my ($this,$NameOrColumn,$Force) = @_;
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74
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75 my $ColName;
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76 if (UNIVERSAL::isa($NameOrColumn,'IMPL::SQL::Schema::Column')) {
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165
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77 $ColName = $NameOrColumn->name;
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49
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78 } elsif (not ref $NameOrColumn) {
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79 $ColName = $NameOrColumn;
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80 }
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81
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82 if (exists $this->{$columnsByName}->{$ColName}) {
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83 my $index = 0;
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84 foreach my $column(@{$this->{$columns}}) {
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85 last if $column->name eq $ColName;
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86 $index++;
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87 }
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88
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89 my $column = $this->{$columns}[$index];
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90 if (my @constraints = $this->GetColumnConstraints($column)){
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91 $Force or die new IMPL::InvalidOperationException('Can\'t remove column which is used in the constraints',@constraints);
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92 $this->RemoveConstraint($_) foreach @constraints;
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93 }
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94
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95 my $removed = splice @{$this->{$columns}},$index,1;
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96 delete $this->{$columnsByName}->{$ColName};
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97 return $removed;
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98 } else {
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99 die new IMPL::InvalidOperationException("The column not found",$NameOrColumn->name);
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100 }
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101 }
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102
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103 sub GetColumn {
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104 my ($this,$name) = @_;
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105
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106 return $this->{$columnsByName}->{$name};
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107 }
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108
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167
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109 sub GetColumnAt {
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110 my ($this,$index) = @_;
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111
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112 die new IMPL::InvalidArgumentException("The index is out of range")
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113 if $index < 0 || $index >= ($this->{$columns} ? scalar(@{$this->{$columns}}) : 0);
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114
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115 return $this->{$columns}[$index];
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116 }
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117
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118 sub ColumnsCount {
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119 my ($this) = @_;
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120
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121 return scalar(@{$this->{$columns}});
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122 }
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123
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124 sub AddConstraint {
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125 my $this = shift;
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126 if (@_ == 1) {
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127 my ($Constraint) = @_;
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128
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129 die new IMPL::InvalidArgumentException('The invalid parameter') if not is($Constraint,typeof IMPL::SQL::Schema::Constraint);
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130
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131 $Constraint->table == $this or die new IMPL::InvalidOperationException('The constaint must belong to the target table');
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132
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133 if (exists $this->{$constraints}->{$Constraint->name}) {
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134 die new IMPL::InvalidOperationException('The table already has the specified constraint',$Constraint->name);
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135 } else {
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136 if (UNIVERSAL::isa($Constraint,'IMPL::SQL::Schema::Constraint::PrimaryKey')) {
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137 not $this->{$primaryKey} or die new IMPL::InvalidOperationException('The table already has a primary key');
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138 $this->{$primaryKey} = $Constraint;
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139 }
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140
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141 $this->{$constraints}->{$Constraint->name} = $Constraint;
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142 }
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143 } elsif( @_ == 2) {
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144 my ($type,$params) = @_;
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145
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146 $type = IMPL::SQL::Schema::Constraint->ResolveAlias($type) or
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147 die new IMPL::Exception("Can't resolve a constraint alias",$_[0]);
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148
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149 $params->{table} = $this;
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150
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151 $this->AddConstraint($type->new(%$params));
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152 } else {
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153 die new IMPL::Exception("Wrong arguments number",scalar(@_));
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154 }
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155 }
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156
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157 sub RemoveConstraint {
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158 my ($this,$Constraint,$Force) = @_;
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159
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160 my $cn = UNIVERSAL::isa($Constraint,'IMPL::SQL::Schema::Constraint') ? $Constraint->name : $Constraint;
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161 $Constraint = $this->{$constraints}->{$cn} or die new IMPL::InvalidOperationException('The specified constraint doesn\'t exists',$cn);
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162
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163 if (UNIVERSAL::isa($Constraint,'IMPL::SQL::Schema::Constraint::PrimaryKey')) {
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164 not scalar keys %{$this->{$primaryKey}->ConnectedFK} or die new IMPL::InvalidOperationException('Can\'t remove Primary Key unless some foreign keys referenses it');
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165
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166 delete $this->{$primaryKey};
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167 }
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168 $Constraint->Dispose;
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169 delete $this->{$constraints}->{$cn};
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170 return $cn;
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171 }
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172
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165
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173 sub GetConstraint {
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174 my ($this,$name) = @_;
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175
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176 return $this->{$constraints}{$name};
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177 }
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178
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179 sub GetConstraints {
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180 my ($this) = @_;
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181
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182 return wantarray ? values %{$this->{$constraints}} : [values %{$this->{$constraints}}];
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183 }
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184
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185 sub GetColumnConstraints {
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186 my ($this,@Columns) = @_;
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187
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188 my @cn = map { UNIVERSAL::isa($_ ,'IMPL::SQL::Schema::Column') ? $_ ->name : $_ } @Columns;
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189 exists $this->{$columnsByName}->{$_} or die new IMPL::InvalidOperationException('The specified column isn\'t found',$_) foreach @cn;
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190
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191 return grep {$_->HasColumn(@cn)} values %{$this->{$constraints}};
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192 }
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193
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194 sub SetPrimaryKey {
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195 my ($this,@ColumnList) = @_;
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196
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197 $this->AddConstraint(new IMPL::SQL::Schema::Constraint::PrimaryKey(name => $this->{$name}.'_PK', table => $this, columns => \@ColumnList));
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198 }
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199
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200 sub LinkTo {
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201 my ($this,$table,@ColumnList) = @_;
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202 $table->primaryKey or die new IMPL::InvalidOperationException('The referenced table must have a primary key');
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203 my $constraintName = $this->{$name}.'_'.$table->name.'_FK_'.join('_',map {ref $_ ? $_->name : $_} @ColumnList);
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204 $this->AddConstraint(new IMPL::SQL::Schema::Constraint::ForeignKey(name => $constraintName, table => $this, columns => \@ColumnList, referencedTable => $table, referencedColumns => $table->primaryKey->columns->as_list));
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205 }
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206
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207 sub Dispose {
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208 my ($this) = @_;
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209
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210 $_->Dispose() foreach values %{$this->{$constraints}};
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211
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212 undef %{$this};
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213 $this->SUPER::Dispose();
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214 }
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215
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216 sub SameValue {
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217 my ($this,$other) = @_;
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218
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219 return 0 unless is $other, typeof $this;
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220
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221 return 0 unless $this->name eq $other->name;
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222 return 0 unless $this->ColumnsCount eq $other->ColumnsCount;
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223
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224 for (my $i = 0; $i < $this->ColumsCount; $i ++) {
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225 return 0 unless $this->($i)->SameValue($other->GetColumnAt($i));
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226 }
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227
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228 my %thisConstraints = map { $_->name, $_ } $this->GetConstraints();
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229 my %otherConstraints = map { $_->name, $_ } $other->GetConstraints();
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230
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231 foreach my $name ( keys %thisConstraints ) {
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232 return 0 unless $otherConstraints{$name};
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233 return 0 unless $thisConstraints{$name}->SameValue(delete $otherConstraints{$name});
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234 }
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235
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236 return 0 if %otherConstraints;
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237
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238 return 1;
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239 }
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240
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241 1;
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242
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243
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